./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-117.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:20,364 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:20,487 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4e4398-f455-496c-8bed-62ace094fdcf/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:20,495 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:20,495 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:20,531 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:20,531 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:20,532 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:20,533 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:20,533 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:20,534 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:20,535 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:20,535 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:20,535 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:20,535 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:20,535 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:20,536 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:20,536 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:20,536 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:20,536 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:20,536 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:20,537 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:20,537 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:20,537 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:20,537 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:20,538 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:20,538 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:20,917 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:20,930 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:20,934 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:20,937 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:20,938 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:20,939 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4e4398-f455-496c-8bed-62ace094fdcf/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-117.smt2
[2025-04-28 21:21:20,941 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:20,948 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:21,141 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b4e4398-f455-496c-8bed-62ace094fdcf/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-117.smt2
[2025-04-28 21:21:21,146 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:21,149 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:21,150 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:21,150 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:21,151 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:21,155 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,186 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21 Unit
[2025-04-28 21:21:21,186 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:21,188 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:21,188 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:21,188 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:21,208 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,209 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,241 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,241 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,243 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,244 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,246 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,247 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,247 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,261 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:21,262 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:21,262 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:21,263 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:21,264 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (1/1) ...
[2025-04-28 21:21:21,266 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:21,282 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:21,299 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 21:21:21,302 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 21:21:21,317 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:21,317 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:21,318 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:21,318 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure inv given in one single declaration
[2025-04-28 21:21:21,318 INFO  L130     BoogieDeclarations]: Found specification of procedure inv
[2025-04-28 21:21:21,318 INFO  L138     BoogieDeclarations]: Found implementation of procedure inv
[2025-04-28 21:21:21,318 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure itp given in one single declaration
[2025-04-28 21:21:21,318 INFO  L130     BoogieDeclarations]: Found specification of procedure itp
[2025-04-28 21:21:21,319 INFO  L138     BoogieDeclarations]: Found implementation of procedure itp
[2025-04-28 21:21:21,319 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:21,319 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:21,319 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:21,364 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:21,367 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:21,454 INFO  L?                        ?]: Removed 1 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:21,454 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:21,468 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:21,469 INFO  L312             CfgBuilder]: Removed 2 assume(true) statements.
[2025-04-28 21:21:21,469 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:21 BoogieIcfgContainer
[2025-04-28 21:21:21,469 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:21,472 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:21,473 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:21,477 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:21,477 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:21" (1/3) ...
[2025-04-28 21:21:21,478 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ed6ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:21, skipping insertion in model container
[2025-04-28 21:21:21,478 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21" (2/3) ...
[2025-04-28 21:21:21,479 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ed6ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:21, skipping insertion in model container
[2025-04-28 21:21:21,479 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:21" (3/3) ...
[2025-04-28 21:21:21,480 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:21,497 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:21,499 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 4 procedures, 16 locations, 24 edges, 4 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:21,551 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:21,572 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;@aa5ddb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:21,573 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:21,578 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 16 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:21,588 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2025-04-28 21:21:21,588 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:21,589 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:21,589 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:21,596 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:21,597 INFO  L85        PathProgramCache]: Analyzing trace with hash 407077779, now seen corresponding path program 1 times
[2025-04-28 21:21:21,605 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:21,606 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114923884]
[2025-04-28 21:21:21,606 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:21,607 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:21,631 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes.
[2025-04-28 21:21:21,652 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements.
[2025-04-28 21:21:21,652 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:21,652 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:21,774 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 21:21:21,774 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:21,774 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114923884]
[2025-04-28 21:21:21,775 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114923884] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:21,775 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:21,778 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:21,780 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588821852]
[2025-04-28 21:21:21,781 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:21,785 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:21,785 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:21,819 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:21,819 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:21,822 INFO  L87              Difference]: Start difference. First operand  has 16 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2025-04-28 21:21:21,860 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:21,860 INFO  L93              Difference]: Finished difference Result 16 states and 19 transitions.
[2025-04-28 21:21:21,862 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:21,864 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 9
[2025-04-28 21:21:21,864 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:21,871 INFO  L225             Difference]: With dead ends: 16
[2025-04-28 21:21:21,871 INFO  L226             Difference]: Without dead ends: 16
[2025-04-28 21:21:21,873 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:21,877 INFO  L437           NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:21,878 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:21,892 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2025-04-28 21:21:21,922 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2025-04-28 21:21:21,923 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16 states, 8 states have (on average 1.0) internal successors, (8), 8 states have internal predecessors, (8), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6)
[2025-04-28 21:21:21,927 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions.
[2025-04-28 21:21:21,928 INFO  L79                 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9
[2025-04-28 21:21:21,929 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:21,929 INFO  L485      AbstractCegarLoop]: Abstraction has 16 states and 19 transitions.
[2025-04-28 21:21:21,929 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2025-04-28 21:21:21,929 INFO  L278                IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions.
[2025-04-28 21:21:21,933 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2025-04-28 21:21:21,933 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:21,933 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:21,933 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:21,934 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:21,934 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:21,935 INFO  L85        PathProgramCache]: Analyzing trace with hash -1636059143, now seen corresponding path program 1 times
[2025-04-28 21:21:21,935 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:21,935 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252192851]
[2025-04-28 21:21:21,935 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:21,935 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:21,942 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes.
[2025-04-28 21:21:21,955 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements.
[2025-04-28 21:21:21,955 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:21,955 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:22,112 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 21:21:22,116 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:22,116 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252192851]
[2025-04-28 21:21:22,116 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252192851] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:22,116 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:22,117 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2025-04-28 21:21:22,117 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861976304]
[2025-04-28 21:21:22,117 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:22,118 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2025-04-28 21:21:22,118 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:22,119 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2025-04-28 21:21:22,120 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2025-04-28 21:21:22,120 INFO  L87              Difference]: Start difference. First operand 16 states and 19 transitions. Second operand  has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)
[2025-04-28 21:21:22,197 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:22,197 INFO  L93              Difference]: Finished difference Result 20 states and 24 transitions.
[2025-04-28 21:21:22,198 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2025-04-28 21:21:22,198 INFO  L79                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 15
[2025-04-28 21:21:22,199 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:22,199 INFO  L225             Difference]: With dead ends: 20
[2025-04-28 21:21:22,199 INFO  L226             Difference]: Without dead ends: 20
[2025-04-28 21:21:22,199 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2025-04-28 21:21:22,200 INFO  L437           NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:22,201 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:22,202 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2025-04-28 21:21:22,205 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18.
[2025-04-28 21:21:22,205 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8)
[2025-04-28 21:21:22,206 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions.
[2025-04-28 21:21:22,206 INFO  L79                 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15
[2025-04-28 21:21:22,206 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:22,206 INFO  L485      AbstractCegarLoop]: Abstraction has 18 states and 22 transitions.
[2025-04-28 21:21:22,207 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)
[2025-04-28 21:21:22,207 INFO  L278                IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions.
[2025-04-28 21:21:22,207 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2025-04-28 21:21:22,208 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:22,208 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:22,208 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2025-04-28 21:21:22,208 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:22,209 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:22,209 INFO  L85        PathProgramCache]: Analyzing trace with hash -2123822147, now seen corresponding path program 1 times
[2025-04-28 21:21:22,209 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:22,209 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187313938]
[2025-04-28 21:21:22,209 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:22,209 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:22,219 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:22,246 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:22,246 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:22,246 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:22,701 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 21:21:22,702 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:22,702 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187313938]
[2025-04-28 21:21:22,702 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187313938] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:22,702 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894595863]
[2025-04-28 21:21:22,702 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:22,703 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:22,708 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:22,711 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 21:21:22,715 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:22,767 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:22,795 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:22,795 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:22,795 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:22,801 INFO  L256         TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:22,819 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:23,286 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 21:21:23,286 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:26,551 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 21:21:26,552 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [894595863] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:26,552 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:26,552 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15
[2025-04-28 21:21:26,553 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136481417]
[2025-04-28 21:21:26,553 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:26,553 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2025-04-28 21:21:26,554 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:26,555 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2025-04-28 21:21:26,557 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210
[2025-04-28 21:21:26,557 INFO  L87              Difference]: Start difference. First operand 18 states and 22 transitions. Second operand  has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11)
[2025-04-28 21:21:26,763 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:26,763 INFO  L93              Difference]: Finished difference Result 26 states and 33 transitions.
[2025-04-28 21:21:26,764 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:21:26,764 INFO  L79                 Accepts]: Start accepts. Automaton has  has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 19
[2025-04-28 21:21:26,764 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:26,765 INFO  L225             Difference]: With dead ends: 26
[2025-04-28 21:21:26,765 INFO  L226             Difference]: Without dead ends: 26
[2025-04-28 21:21:26,766 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272
[2025-04-28 21:21:26,767 INFO  L437           NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:26,767 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 116 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:26,768 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2025-04-28 21:21:26,773 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22.
[2025-04-28 21:21:26,773 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 22 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 5 states have call successors, (5), 3 states have call predecessors, (5), 7 states have return successors, (11), 8 states have call predecessors, (11), 5 states have call successors, (11)
[2025-04-28 21:21:26,774 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions.
[2025-04-28 21:21:26,774 INFO  L79                 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19
[2025-04-28 21:21:26,774 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:26,775 INFO  L485      AbstractCegarLoop]: Abstraction has 22 states and 27 transitions.
[2025-04-28 21:21:26,775 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (8), 1 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11)
[2025-04-28 21:21:26,775 INFO  L278                IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions.
[2025-04-28 21:21:26,776 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2025-04-28 21:21:26,776 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:26,776 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:26,782 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:26,979 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:26,980 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:26,980 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:26,981 INFO  L85        PathProgramCache]: Analyzing trace with hash 824286721, now seen corresponding path program 2 times
[2025-04-28 21:21:26,981 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:26,981 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314415179]
[2025-04-28 21:21:26,981 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:26,981 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:26,989 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes.
[2025-04-28 21:21:27,009 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements.
[2025-04-28 21:21:27,009 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:27,009 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:27,415 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2025-04-28 21:21:27,415 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:27,415 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314415179]
[2025-04-28 21:21:27,416 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314415179] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:27,416 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954941338]
[2025-04-28 21:21:27,416 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:27,416 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:27,419 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:27,421 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 21:21:27,426 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:27,476 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes.
[2025-04-28 21:21:27,495 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements.
[2025-04-28 21:21:27,496 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:27,496 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:27,497 INFO  L256         TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 31 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:27,499 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:27,881 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2025-04-28 21:21:27,881 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:33,474 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2025-04-28 21:21:33,474 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954941338] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:33,474 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:33,474 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21
[2025-04-28 21:21:33,475 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695805197]
[2025-04-28 21:21:33,475 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:33,475 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2025-04-28 21:21:33,475 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:33,476 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2025-04-28 21:21:33,477 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420
[2025-04-28 21:21:33,477 INFO  L87              Difference]: Start difference. First operand 22 states and 27 transitions. Second operand  has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14)
[2025-04-28 21:21:33,955 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:33,955 INFO  L93              Difference]: Finished difference Result 40 states and 52 transitions.
[2025-04-28 21:21:33,956 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2025-04-28 21:21:33,956 INFO  L79                 Accepts]: Start accepts. Automaton has  has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) Word has length 23
[2025-04-28 21:21:33,957 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:33,957 INFO  L225             Difference]: With dead ends: 40
[2025-04-28 21:21:33,958 INFO  L226             Difference]: Without dead ends: 40
[2025-04-28 21:21:33,958 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870
[2025-04-28 21:21:33,959 INFO  L437           NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:33,960 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 212 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:21:33,960 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2025-04-28 21:21:33,966 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30.
[2025-04-28 21:21:33,966 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 15 states have (on average 1.0) internal successors, (15), 15 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 11 states have return successors, (18), 12 states have call predecessors, (18), 5 states have call successors, (18)
[2025-04-28 21:21:33,967 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions.
[2025-04-28 21:21:33,967 INFO  L79                 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 23
[2025-04-28 21:21:33,967 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:33,968 INFO  L485      AbstractCegarLoop]: Abstraction has 30 states and 38 transitions.
[2025-04-28 21:21:33,968 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14)
[2025-04-28 21:21:33,968 INFO  L278                IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions.
[2025-04-28 21:21:33,969 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2025-04-28 21:21:33,969 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:33,969 INFO  L218           NwaCegarLoop]: trace histogram [6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:33,974 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:34,173 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:34,173 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:34,174 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:34,174 INFO  L85        PathProgramCache]: Analyzing trace with hash 2084113357, now seen corresponding path program 3 times
[2025-04-28 21:21:34,174 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:34,174 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14343695]
[2025-04-28 21:21:34,174 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:34,174 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:34,181 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 7 equivalence classes.
[2025-04-28 21:21:34,230 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 35 of 35 statements.
[2025-04-28 21:21:34,231 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2025-04-28 21:21:34,231 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:35,654 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2025-04-28 21:21:35,655 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:35,655 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14343695]
[2025-04-28 21:21:35,655 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14343695] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:35,655 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041764935]
[2025-04-28 21:21:35,655 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:35,655 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:35,658 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:35,660 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 21:21:35,663 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:35,740 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 7 equivalence classes.
[2025-04-28 21:21:35,769 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 35 of 35 statements.
[2025-04-28 21:21:35,769 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2025-04-28 21:21:35,769 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:35,771 INFO  L256         TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 58 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:35,775 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:36,369 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2025-04-28 21:21:36,369 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
