./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-213.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:35,317 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:35,404 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bee9e4-2c78-43e2-bf9c-fca082772b6a/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:35,412 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:35,412 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:35,449 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:35,450 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:35,450 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:35,452 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:35,452 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:35,452 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:35,452 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:35,452 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:35,453 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:35,453 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:35,453 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:35,453 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:35,453 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:35,453 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:35,453 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:35,453 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:35,453 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:35,454 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:35,454 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:35,454 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:35,455 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:35,455 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:35,777 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:35,787 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:35,789 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:35,791 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:35,791 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:35,794 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bee9e4-2c78-43e2-bf9c-fca082772b6a/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-213.smt2
[2025-04-28 21:21:35,796 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:35,800 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:36,346 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0bee9e4-2c78-43e2-bf9c-fca082772b6a/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-213.smt2
[2025-04-28 21:21:36,352 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:36,354 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:36,357 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:36,357 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:36,357 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:36,362 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,415 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36 Unit
[2025-04-28 21:21:36,415 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:36,416 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:36,417 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:36,417 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:36,433 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,433 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,469 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,469 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,483 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,488 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,498 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,502 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,503 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,534 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:36,538 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:36,538 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:36,538 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:36,539 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (1/1) ...
[2025-04-28 21:21:36,543 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:36,562 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:36,578 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2025-04-28 21:21:36,582 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2025-04-28 21:21:36,601 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:36,601 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:36,601 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:36,601 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure CHC_COMP_FALSE given in one single declaration
[2025-04-28 21:21:36,602 INFO  L130     BoogieDeclarations]: Found specification of procedure CHC_COMP_FALSE
[2025-04-28 21:21:36,602 INFO  L138     BoogieDeclarations]: Found implementation of procedure CHC_COMP_FALSE
[2025-04-28 21:21:36,602 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn__bar given in one single declaration
[2025-04-28 21:21:36,602 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn__bar
[2025-04-28 21:21:36,602 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn__bar
[2025-04-28 21:21:36,602 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn__bar given in one single declaration
[2025-04-28 21:21:36,603 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn__bar
[2025-04-28 21:21:36,603 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn__bar
[2025-04-28 21:21:36,603 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn given in one single declaration
[2025-04-28 21:21:36,604 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn
[2025-04-28 21:21:36,604 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn
[2025-04-28 21:21:36,604 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn given in one single declaration
[2025-04-28 21:21:36,604 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn
[2025-04-28 21:21:36,604 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn
[2025-04-28 21:21:36,605 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure lturn given in one single declaration
[2025-04-28 21:21:36,605 INFO  L130     BoogieDeclarations]: Found specification of procedure lturn
[2025-04-28 21:21:36,605 INFO  L138     BoogieDeclarations]: Found implementation of procedure lturn
[2025-04-28 21:21:36,605 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:36,605 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:36,606 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:36,694 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:36,698 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:37,375 INFO  L?                        ?]: Removed 4 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:37,376 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:37,400 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:37,402 INFO  L312             CfgBuilder]: Removed 12 assume(true) statements.
[2025-04-28 21:21:37,403 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:37 BoogieIcfgContainer
[2025-04-28 21:21:37,403 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:37,406 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:37,406 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:37,411 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:37,411 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:36" (1/3) ...
[2025-04-28 21:21:37,412 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b534985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:37, skipping insertion in model container
[2025-04-28 21:21:37,413 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:36" (2/3) ...
[2025-04-28 21:21:37,413 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b534985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:37, skipping insertion in model container
[2025-04-28 21:21:37,413 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:37" (3/3) ...
[2025-04-28 21:21:37,414 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:37,431 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:37,434 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 8 procedures, 150 locations, 451 edges, 8 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:37,486 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:37,501 INFO  L340      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17bd36a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:37,502 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:37,506 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 150 states, 13 states have (on average 3.076923076923077) internal successors, (40), 38 states have internal predecessors, (40), 131 states have call successors, (137), 7 states have call predecessors, (137), 7 states have return successors, (137), 105 states have call predecessors, (137), 131 states have call successors, (137)
[2025-04-28 21:21:37,542 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:37,542 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:37,543 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:37,543 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:37,555 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:37,556 INFO  L85        PathProgramCache]: Analyzing trace with hash 2123362628, now seen corresponding path program 1 times
[2025-04-28 21:21:37,565 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:37,566 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075938984]
[2025-04-28 21:21:37,566 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:37,567 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:37,618 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:37,766 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:37,767 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:37,767 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:38,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:38,523 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:38,523 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075938984]
[2025-04-28 21:21:38,524 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075938984] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:38,528 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:38,535 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:38,540 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333771221]
[2025-04-28 21:21:38,542 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:38,555 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:38,556 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:38,612 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:38,613 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:38,616 INFO  L87              Difference]: Start difference. First operand  has 150 states, 13 states have (on average 3.076923076923077) internal successors, (40), 38 states have internal predecessors, (40), 131 states have call successors, (137), 7 states have call predecessors, (137), 7 states have return successors, (137), 105 states have call predecessors, (137), 131 states have call successors, (137) Second operand  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:40,711 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:40,712 INFO  L93              Difference]: Finished difference Result 196 states and 567 transitions.
[2025-04-28 21:21:40,713 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:40,715 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 21
[2025-04-28 21:21:40,716 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:40,743 INFO  L225             Difference]: With dead ends: 196
[2025-04-28 21:21:40,743 INFO  L226             Difference]: Without dead ends: 196
[2025-04-28 21:21:40,749 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:40,753 INFO  L437           NwaCegarLoop]: 292 mSDtfsCounter, 9 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:40,757 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1559 Invalid, 1124 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2025-04-28 21:21:40,776 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 196 states.
[2025-04-28 21:21:40,944 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194.
[2025-04-28 21:21:40,948 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 194 states, 16 states have (on average 3.1875) internal successors, (51), 48 states have internal predecessors, (51), 171 states have call successors, (178), 9 states have call predecessors, (178), 10 states have return successors, (335), 138 states have call predecessors, (335), 171 states have call successors, (335)
[2025-04-28 21:21:40,962 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions.
[2025-04-28 21:21:40,963 INFO  L79                 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 21
[2025-04-28 21:21:40,965 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:40,965 INFO  L485      AbstractCegarLoop]: Abstraction has 194 states and 564 transitions.
[2025-04-28 21:21:40,965 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:40,965 INFO  L278                IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions.
[2025-04-28 21:21:40,980 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:21:40,980 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:40,980 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:40,981 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:40,981 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:40,982 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:40,982 INFO  L85        PathProgramCache]: Analyzing trace with hash 694286929, now seen corresponding path program 1 times
[2025-04-28 21:21:40,982 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:40,982 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309509223]
[2025-04-28 21:21:40,983 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:40,983 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:41,000 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:41,036 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:41,037 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:41,037 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:41,439 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:41,440 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:41,440 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309509223]
[2025-04-28 21:21:41,440 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309509223] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:41,440 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562044938]
[2025-04-28 21:21:41,440 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:41,440 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:41,444 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:41,450 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:41,452 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:41,515 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:41,569 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:41,569 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:41,569 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:41,573 INFO  L256         TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:41,588 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:41,776 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:41,776 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:42,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:42,662 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [562044938] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:42,662 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:42,662 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14
[2025-04-28 21:21:42,663 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595532162]
[2025-04-28 21:21:42,663 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:42,663 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2025-04-28 21:21:42,664 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:42,664 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2025-04-28 21:21:42,664 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182
[2025-04-28 21:21:42,665 INFO  L87              Difference]: Start difference. First operand 194 states and 564 transitions. Second operand  has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12)
[2025-04-28 21:21:43,892 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:43,893 INFO  L93              Difference]: Finished difference Result 211 states and 718 transitions.
[2025-04-28 21:21:43,893 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:43,893 INFO  L79                 Accepts]: Start accepts. Automaton has  has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 24
[2025-04-28 21:21:43,894 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:43,903 INFO  L225             Difference]: With dead ends: 211
[2025-04-28 21:21:43,904 INFO  L226             Difference]: Without dead ends: 211
[2025-04-28 21:21:43,904 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:21:43,907 INFO  L437           NwaCegarLoop]: 302 mSDtfsCounter, 2 mSDsluCounter, 3422 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3724 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:43,908 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3724 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2025-04-28 21:21:43,909 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 211 states.
[2025-04-28 21:21:43,997 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209.
[2025-04-28 21:21:43,998 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 209 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 51 states have internal predecessors, (54), 180 states have call successors, (187), 9 states have call predecessors, (187), 13 states have return successors, (475), 150 states have call predecessors, (475), 180 states have call successors, (475)
[2025-04-28 21:21:44,003 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 716 transitions.
[2025-04-28 21:21:44,004 INFO  L79                 Accepts]: Start accepts. Automaton has 209 states and 716 transitions. Word has length 24
[2025-04-28 21:21:44,004 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:44,004 INFO  L485      AbstractCegarLoop]: Abstraction has 209 states and 716 transitions.
[2025-04-28 21:21:44,005 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12)
[2025-04-28 21:21:44,006 INFO  L278                IsEmpty]: Start isEmpty. Operand 209 states and 716 transitions.
[2025-04-28 21:21:44,014 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:44,014 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:44,014 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:44,022 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:44,218 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:44,219 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:44,219 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:44,219 INFO  L85        PathProgramCache]: Analyzing trace with hash -2080543123, now seen corresponding path program 1 times
[2025-04-28 21:21:44,219 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:44,219 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155116794]
[2025-04-28 21:21:44,219 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:44,220 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:44,231 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:44,264 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:44,264 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:44,264 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:44,439 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:44,439 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:44,439 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155116794]
[2025-04-28 21:21:44,439 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155116794] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:44,439 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:44,440 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:44,440 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275978267]
[2025-04-28 21:21:44,440 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:44,440 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:44,440 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:44,441 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:44,441 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:44,441 INFO  L87              Difference]: Start difference. First operand 209 states and 716 transitions. Second operand  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:44,773 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:44,773 INFO  L93              Difference]: Finished difference Result 211 states and 716 transitions.
[2025-04-28 21:21:44,773 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:44,774 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 21
[2025-04-28 21:21:44,774 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:44,780 INFO  L225             Difference]: With dead ends: 211
[2025-04-28 21:21:44,780 INFO  L226             Difference]: Without dead ends: 211
[2025-04-28 21:21:44,781 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:44,781 INFO  L437           NwaCegarLoop]: 296 mSDtfsCounter, 1 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:44,782 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1438 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2025-04-28 21:21:44,783 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 211 states.
[2025-04-28 21:21:44,856 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209.
[2025-04-28 21:21:44,857 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 209 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 51 states have internal predecessors, (54), 180 states have call successors, (187), 9 states have call predecessors, (187), 13 states have return successors, (473), 150 states have call predecessors, (473), 180 states have call successors, (473)
[2025-04-28 21:21:44,864 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 714 transitions.
[2025-04-28 21:21:44,864 INFO  L79                 Accepts]: Start accepts. Automaton has 209 states and 714 transitions. Word has length 21
[2025-04-28 21:21:44,864 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:44,864 INFO  L485      AbstractCegarLoop]: Abstraction has 209 states and 714 transitions.
[2025-04-28 21:21:44,865 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:44,865 INFO  L278                IsEmpty]: Start isEmpty. Operand 209 states and 714 transitions.
[2025-04-28 21:21:44,872 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:44,872 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:44,872 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:44,872 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2025-04-28 21:21:44,872 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:44,873 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:44,874 INFO  L85        PathProgramCache]: Analyzing trace with hash 804427721, now seen corresponding path program 1 times
[2025-04-28 21:21:44,874 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:44,874 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561600555]
[2025-04-28 21:21:44,874 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:44,874 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:44,882 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:44,904 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:44,904 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:44,904 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:45,113 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:45,113 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:45,114 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561600555]
[2025-04-28 21:21:45,114 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561600555] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:45,114 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:45,114 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:45,114 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196463589]
[2025-04-28 21:21:45,114 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:45,114 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:45,114 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:45,115 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:45,115 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:45,115 INFO  L87              Difference]: Start difference. First operand 209 states and 714 transitions. Second operand  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:46,557 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:46,557 INFO  L93              Difference]: Finished difference Result 293 states and 1311 transitions.
[2025-04-28 21:21:46,558 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:46,558 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 21
[2025-04-28 21:21:46,558 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:46,573 INFO  L225             Difference]: With dead ends: 293
[2025-04-28 21:21:46,573 INFO  L226             Difference]: Without dead ends: 293
[2025-04-28 21:21:46,573 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:46,574 INFO  L437           NwaCegarLoop]: 315 mSDtfsCounter, 10 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:46,577 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1704 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time]
[2025-04-28 21:21:46,579 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 293 states.
[2025-04-28 21:21:46,762 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291.
[2025-04-28 21:21:46,764 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 291 states, 25 states have (on average 3.08) internal successors, (77), 72 states have internal predecessors, (77), 254 states have call successors, (264), 13 states have call predecessors, (264), 17 states have return successors, (968), 208 states have call predecessors, (968), 254 states have call successors, (968)
[2025-04-28 21:21:46,775 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 1309 transitions.
[2025-04-28 21:21:46,775 INFO  L79                 Accepts]: Start accepts. Automaton has 291 states and 1309 transitions. Word has length 21
[2025-04-28 21:21:46,776 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:46,776 INFO  L485      AbstractCegarLoop]: Abstraction has 291 states and 1309 transitions.
[2025-04-28 21:21:46,776 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:46,776 INFO  L278                IsEmpty]: Start isEmpty. Operand 291 states and 1309 transitions.
[2025-04-28 21:21:46,787 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:21:46,787 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:46,787 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:46,787 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2025-04-28 21:21:46,788 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:46,788 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:46,788 INFO  L85        PathProgramCache]: Analyzing trace with hash 478541946, now seen corresponding path program 1 times
[2025-04-28 21:21:46,789 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:46,790 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889518889]
[2025-04-28 21:21:46,790 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:46,790 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:46,803 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:46,827 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:46,828 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:46,828 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:47,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:47,120 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:47,120 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889518889]
[2025-04-28 21:21:47,121 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889518889] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:47,121 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248890548]
[2025-04-28 21:21:47,121 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:47,121 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:47,123 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:47,125 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:47,127 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:47,180 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:47,229 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:47,230 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:47,230 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:47,232 INFO  L256         TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 12 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:47,234 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:47,390 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:47,391 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:48,176 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:48,176 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248890548] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:48,176 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:48,176 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14
[2025-04-28 21:21:48,176 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976795779]
[2025-04-28 21:21:48,176 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:48,177 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2025-04-28 21:21:48,177 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:48,178 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2025-04-28 21:21:48,178 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182
[2025-04-28 21:21:48,178 INFO  L87              Difference]: Start difference. First operand 291 states and 1309 transitions. Second operand  has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12)
[2025-04-28 21:21:53,679 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:53,679 INFO  L93              Difference]: Finished difference Result 639 states and 6191 transitions.
[2025-04-28 21:21:53,680 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2025-04-28 21:21:53,680 INFO  L79                 Accepts]: Start accepts. Automaton has  has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 24
[2025-04-28 21:21:53,680 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:53,745 INFO  L225             Difference]: With dead ends: 639
[2025-04-28 21:21:53,745 INFO  L226             Difference]: Without dead ends: 639
[2025-04-28 21:21:53,745 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380
[2025-04-28 21:21:53,747 INFO  L437           NwaCegarLoop]: 335 mSDtfsCounter, 21 mSDsluCounter, 3367 mSDsCounter, 0 mSdLazyCounter, 5132 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 3702 SdHoareTripleChecker+Invalid, 5406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 5132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:53,748 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 3702 Invalid, 5406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 5132 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time]
[2025-04-28 21:21:53,749 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 639 states.
[2025-04-28 21:21:55,268 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 630.
[2025-04-28 21:21:55,274 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 630 states, 57 states have (on average 2.754385964912281) internal successors, (157), 141 states have internal predecessors, (157), 539 states have call successors, (554), 23 states have call predecessors, (554), 44 states have return successors, (5464), 470 states have call predecessors, (5464), 539 states have call successors, (5464)
[2025-04-28 21:21:55,312 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 6175 transitions.
[2025-04-28 21:21:55,312 INFO  L79                 Accepts]: Start accepts. Automaton has 630 states and 6175 transitions. Word has length 24
[2025-04-28 21:21:55,313 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:55,313 INFO  L485      AbstractCegarLoop]: Abstraction has 630 states and 6175 transitions.
[2025-04-28 21:21:55,313 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 3 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12)
[2025-04-28 21:21:55,313 INFO  L278                IsEmpty]: Start isEmpty. Operand 630 states and 6175 transitions.
[2025-04-28 21:21:55,327 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:21:55,327 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:55,327 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:55,333 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:55,528 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:55,528 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:55,529 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:55,529 INFO  L85        PathProgramCache]: Analyzing trace with hash 667904145, now seen corresponding path program 1 times
[2025-04-28 21:21:55,529 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:55,529 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363828555]
[2025-04-28 21:21:55,529 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:55,529 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:55,540 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:55,556 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:55,556 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:55,557 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:55,751 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:55,752 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:55,752 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363828555]
[2025-04-28 21:21:55,752 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363828555] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:55,752 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:55,752 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:55,752 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027485344]
[2025-04-28 21:21:55,752 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:55,753 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:55,753 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:55,753 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:55,753 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:55,753 INFO  L87              Difference]: Start difference. First operand 630 states and 6175 transitions. Second operand  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:56,939 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:56,939 INFO  L93              Difference]: Finished difference Result 777 states and 9238 transitions.
[2025-04-28 21:21:56,939 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:56,940 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24
[2025-04-28 21:21:56,940 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:57,035 INFO  L225             Difference]: With dead ends: 777
[2025-04-28 21:21:57,035 INFO  L226             Difference]: Without dead ends: 776
[2025-04-28 21:21:57,035 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:57,036 INFO  L437           NwaCegarLoop]: 367 mSDtfsCounter, 9 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:57,036 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1611 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2025-04-28 21:21:57,040 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 776 states.
[2025-04-28 21:21:58,828 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 771.
[2025-04-28 21:21:58,837 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 771 states, 83 states have (on average 2.289156626506024) internal successors, (190), 174 states have internal predecessors, (190), 630 states have call successors, (647), 25 states have call predecessors, (647), 69 states have return successors, (8374), 576 states have call predecessors, (8374), 630 states have call successors, (8374)
[2025-04-28 21:21:58,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 9211 transitions.
[2025-04-28 21:21:58,899 INFO  L79                 Accepts]: Start accepts. Automaton has 771 states and 9211 transitions. Word has length 24
[2025-04-28 21:21:58,899 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:58,899 INFO  L485      AbstractCegarLoop]: Abstraction has 771 states and 9211 transitions.
[2025-04-28 21:21:58,899 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:21:58,899 INFO  L278                IsEmpty]: Start isEmpty. Operand 771 states and 9211 transitions.
[2025-04-28 21:21:58,919 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:58,920 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:58,920 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:58,920 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2025-04-28 21:21:58,921 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:58,922 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:58,922 INFO  L85        PathProgramCache]: Analyzing trace with hash -2027608236, now seen corresponding path program 1 times
[2025-04-28 21:21:58,922 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:58,922 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730675517]
[2025-04-28 21:21:58,922 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:58,922 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:58,930 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:58,949 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:58,949 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:58,949 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:59,147 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:59,147 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:59,147 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730675517]
[2025-04-28 21:21:59,147 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730675517] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:59,147 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:59,147 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:59,147 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114902568]
[2025-04-28 21:21:59,147 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:59,148 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:59,148 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:59,148 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:59,148 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:59,148 INFO  L87              Difference]: Start difference. First operand 771 states and 9211 transitions. Second operand  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:22:00,478 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:00,478 INFO  L93              Difference]: Finished difference Result 778 states and 9289 transitions.
[2025-04-28 21:22:00,479 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:22:00,479 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 21
[2025-04-28 21:22:00,479 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:00,544 INFO  L225             Difference]: With dead ends: 778
[2025-04-28 21:22:00,544 INFO  L226             Difference]: Without dead ends: 777
[2025-04-28 21:22:00,544 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:00,545 INFO  L437           NwaCegarLoop]: 344 mSDtfsCounter, 9 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:00,545 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1845 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2025-04-28 21:22:00,547 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 777 states.
[2025-04-28 21:22:01,866 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 775.
[2025-04-28 21:22:01,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 775 states, 83 states have (on average 2.289156626506024) internal successors, (190), 174 states have internal predecessors, (190), 634 states have call successors, (651), 25 states have call predecessors, (651), 69 states have return successors, (8439), 580 states have call predecessors, (8439), 634 states have call successors, (8439)
[2025-04-28 21:22:01,925 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 9280 transitions.
[2025-04-28 21:22:01,925 INFO  L79                 Accepts]: Start accepts. Automaton has 775 states and 9280 transitions. Word has length 21
[2025-04-28 21:22:01,926 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:01,926 INFO  L485      AbstractCegarLoop]: Abstraction has 775 states and 9280 transitions.
[2025-04-28 21:22:01,926 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)
[2025-04-28 21:22:01,926 INFO  L278                IsEmpty]: Start isEmpty. Operand 775 states and 9280 transitions.
[2025-04-28 21:22:01,943 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:22:01,944 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:01,944 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:01,944 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2025-04-28 21:22:01,944 INFO  L403      AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:01,945 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:01,945 INFO  L85        PathProgramCache]: Analyzing trace with hash -508128308, now seen corresponding path program 1 times
[2025-04-28 21:22:01,945 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:01,945 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459954309]
[2025-04-28 21:22:01,946 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:01,946 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:01,952 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:22:01,962 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:22:01,962 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:01,962 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:02,192 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:22:02,192 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:02,192 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459954309]
[2025-04-28 21:22:02,192 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459954309] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:02,192 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652374764]
[2025-04-28 21:22:02,192 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:02,196 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:02,198 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:02,202 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:22:02,251 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:22:02,341 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:22:02,383 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:22:02,384 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:02,384 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:02,386 INFO  L256         TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:02,387 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:02,470 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:22:02,470 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:03,109 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:22:03,109 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652374764] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:03,109 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:03,109 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12
[2025-04-28 21:22:03,109 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305904399]
[2025-04-28 21:22:03,109 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:03,110 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2025-04-28 21:22:03,110 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:03,110 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2025-04-28 21:22:03,110 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:22:03,111 INFO  L87              Difference]: Start difference. First operand 775 states and 9280 transitions. Second operand  has 12 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12)
