./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-184.smt2 .


--------------------------------------------------------------------------------


This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:20,372 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:20,474 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f670d54-4629-46e2-9ca5-eac1fc38494c/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:20,479 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:20,479 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:20,507 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:20,508 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:20,508 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:20,509 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:20,509 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:20,509 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:20,509 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:20,510 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:20,510 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:20,510 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:20,510 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:20,510 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:20,511 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:20,511 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:20,511 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:20,511 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:20,511 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:20,511 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:20,511 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:20,512 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:20,512 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:20,513 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:20,898 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:20,911 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:20,916 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:20,918 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:20,919 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:20,922 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f670d54-4629-46e2-9ca5-eac1fc38494c/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-184.smt2
[2025-04-28 21:21:20,924 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:20,930 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:21,546 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f670d54-4629-46e2-9ca5-eac1fc38494c/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-184.smt2
[2025-04-28 21:21:21,550 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:21,551 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:21,553 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:21,553 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:21,553 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:21,562 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 21:21:21,618 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:21 Unit
[2025-04-28 21:21:21,619 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:21,620 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:21,620 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:21,620 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:21,644 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 21:21:21,644 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 21:21:21,682 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 21:21:21,682 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 21:21:21,694 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 21:21:21,697 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 21:21:21,700 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 21:21:21,708 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 21:21:21,710 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 21:21:21,732 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:21,733 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:21,733 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:21,733 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:21,734 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 21:21:21,738 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:21,760 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:21,778 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 21:21:21,783 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 21:21:21,808 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:21,809 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:21,809 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:21,809 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure CHC_COMP_FALSE given in one single declaration
[2025-04-28 21:21:21,809 INFO  L130     BoogieDeclarations]: Found specification of procedure CHC_COMP_FALSE
[2025-04-28 21:21:21,809 INFO  L138     BoogieDeclarations]: Found implementation of procedure CHC_COMP_FALSE
[2025-04-28 21:21:21,810 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn__bar given in one single declaration
[2025-04-28 21:21:21,810 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn__bar
[2025-04-28 21:21:21,810 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn__bar
[2025-04-28 21:21:21,811 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn__bar given in one single declaration
[2025-04-28 21:21:21,811 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn__bar
[2025-04-28 21:21:21,811 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn__bar
[2025-04-28 21:21:21,811 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure step_lturn given in one single declaration
[2025-04-28 21:21:21,811 INFO  L130     BoogieDeclarations]: Found specification of procedure step_lturn
[2025-04-28 21:21:21,811 INFO  L138     BoogieDeclarations]: Found implementation of procedure step_lturn
[2025-04-28 21:21:21,813 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure combined_lturn given in one single declaration
[2025-04-28 21:21:21,814 INFO  L130     BoogieDeclarations]: Found specification of procedure combined_lturn
[2025-04-28 21:21:21,814 INFO  L138     BoogieDeclarations]: Found implementation of procedure combined_lturn
[2025-04-28 21:21:21,814 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure lturn given in one single declaration
[2025-04-28 21:21:21,814 INFO  L130     BoogieDeclarations]: Found specification of procedure lturn
[2025-04-28 21:21:21,814 INFO  L138     BoogieDeclarations]: Found implementation of procedure lturn
[2025-04-28 21:21:21,814 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:21,814 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:21,814 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:21,927 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:21,931 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:22,685 INFO  L?                        ?]: Removed 4 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:22,685 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:22,707 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:22,708 INFO  L312             CfgBuilder]: Removed 12 assume(true) statements.
[2025-04-28 21:21:22,708 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:22 BoogieIcfgContainer
[2025-04-28 21:21:22,708 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:22,714 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:22,715 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:22,719 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:22,719 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 21:21:22,720 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6693b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:22, skipping insertion in model container
[2025-04-28 21:21:22,720 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 21:21:22,720 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6693b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:22, skipping insertion in model container
[2025-04-28 21:21:22,720 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:22" (3/3) ...
[2025-04-28 21:21:22,722 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:22,740 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:22,743 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 8 procedures, 150 locations, 449 edges, 8 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:22,796 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:22,811 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;@219c352, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:22,812 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:22,818 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 150 states, 13 states have (on average 2.923076923076923) internal successors, (38), 38 states have internal predecessors, (38), 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 21:21:22,852 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:22,852 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:22,856 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 21:21:22,857 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:22,863 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:22,864 INFO  L85        PathProgramCache]: Analyzing trace with hash 1989682162, now seen corresponding path program 1 times
[2025-04-28 21:21:22,872 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:22,873 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527345557]
[2025-04-28 21:21:22,873 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:22,874 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:22,918 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:23,056 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:23,056 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:23,056 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:23,886 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 21:21:23,888 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:23,889 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527345557]
[2025-04-28 21:21:23,890 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527345557] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:23,892 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:23,895 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:23,897 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237286640]
[2025-04-28 21:21:23,898 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:23,902 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:23,903 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:23,954 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:23,958 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:23,960 INFO  L87              Difference]: Start difference. First operand  has 150 states, 13 states have (on average 2.923076923076923) internal successors, (38), 38 states have internal predecessors, (38), 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 21:21:26,133 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:26,134 INFO  L93              Difference]: Finished difference Result 196 states and 564 transitions.
[2025-04-28 21:21:26,135 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:26,137 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 21:21:26,137 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:26,170 INFO  L225             Difference]: With dead ends: 196
[2025-04-28 21:21:26,170 INFO  L226             Difference]: Without dead ends: 196
[2025-04-28 21:21:26,173 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 21:21:26,177 INFO  L437           NwaCegarLoop]: 305 mSDtfsCounter, 9 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:26,178 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1637 Invalid, 1132 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time]
[2025-04-28 21:21:26,199 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 196 states.
[2025-04-28 21:21:26,378 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193.
[2025-04-28 21:21:26,379 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 193 states, 16 states have (on average 3.0) internal successors, (48), 47 states have internal predecessors, (48), 170 states have call successors, (177), 9 states have call predecessors, (177), 10 states have return successors, (334), 137 states have call predecessors, (334), 170 states have call successors, (334)
[2025-04-28 21:21:26,400 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 559 transitions.
[2025-04-28 21:21:26,401 INFO  L79                 Accepts]: Start accepts. Automaton has 193 states and 559 transitions. Word has length 21
[2025-04-28 21:21:26,402 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:26,402 INFO  L485      AbstractCegarLoop]: Abstraction has 193 states and 559 transitions.
[2025-04-28 21:21:26,403 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 21:21:26,403 INFO  L278                IsEmpty]: Start isEmpty. Operand 193 states and 559 transitions.
[2025-04-28 21:21:26,418 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:21:26,418 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:26,418 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 21:21:26,419 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:26,419 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:26,420 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:26,420 INFO  L85        PathProgramCache]: Analyzing trace with hash -174217751, now seen corresponding path program 1 times
[2025-04-28 21:21:26,420 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:26,420 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734053683]
[2025-04-28 21:21:26,420 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:26,421 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:26,441 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:26,467 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:26,467 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:26,468 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:26,922 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 21:21:26,922 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:26,923 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734053683]
[2025-04-28 21:21:26,923 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734053683] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:26,923 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:26,923 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:26,923 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694895580]
[2025-04-28 21:21:26,923 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:26,924 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:26,928 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:26,928 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:26,929 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:26,929 INFO  L87              Difference]: Start difference. First operand 193 states and 559 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 21:21:28,548 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:28,549 INFO  L93              Difference]: Finished difference Result 247 states and 941 transitions.
[2025-04-28 21:21:28,550 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:28,550 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 21:21:28,551 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:28,570 INFO  L225             Difference]: With dead ends: 247
[2025-04-28 21:21:28,570 INFO  L226             Difference]: Without dead ends: 246
[2025-04-28 21:21:28,572 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 21:21:28,573 INFO  L437           NwaCegarLoop]: 316 mSDtfsCounter, 9 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:28,575 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1363 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2025-04-28 21:21:28,577 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 246 states.
[2025-04-28 21:21:28,808 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242.
[2025-04-28 21:21:28,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 242 states, 21 states have (on average 2.857142857142857) internal successors, (60), 59 states have internal predecessors, (60), 211 states have call successors, (220), 11 states have call predecessors, (220), 14 states have return successors, (654), 172 states have call predecessors, (654), 211 states have call successors, (654)
[2025-04-28 21:21:28,818 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 934 transitions.
[2025-04-28 21:21:28,818 INFO  L79                 Accepts]: Start accepts. Automaton has 242 states and 934 transitions. Word has length 24
[2025-04-28 21:21:28,819 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:28,819 INFO  L485      AbstractCegarLoop]: Abstraction has 242 states and 934 transitions.
[2025-04-28 21:21:28,822 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 21:21:28,823 INFO  L278                IsEmpty]: Start isEmpty. Operand 242 states and 934 transitions.
[2025-04-28 21:21:28,836 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:21:28,836 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:28,836 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 21:21:28,837 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2025-04-28 21:21:28,837 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:28,838 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:28,838 INFO  L85        PathProgramCache]: Analyzing trace with hash -746052380, now seen corresponding path program 1 times
[2025-04-28 21:21:28,838 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:28,838 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591206771]
[2025-04-28 21:21:28,838 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:28,839 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:28,865 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:28,896 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:28,900 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:28,900 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:29,357 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 21:21:29,358 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:29,358 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591206771]
[2025-04-28 21:21:29,358 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591206771] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:29,358 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:29,358 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:29,359 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194499695]
[2025-04-28 21:21:29,359 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:29,359 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:29,359 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:29,360 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:29,360 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:29,361 INFO  L87              Difference]: Start difference. First operand 242 states and 934 transitions. Second operand  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7)
[2025-04-28 21:21:31,252 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:31,252 INFO  L93              Difference]: Finished difference Result 357 states and 1860 transitions.
[2025-04-28 21:21:31,253 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:31,253 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 24
[2025-04-28 21:21:31,253 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:31,281 INFO  L225             Difference]: With dead ends: 357
[2025-04-28 21:21:31,281 INFO  L226             Difference]: Without dead ends: 356
[2025-04-28 21:21:31,281 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 21:21:31,285 INFO  L437           NwaCegarLoop]: 360 mSDtfsCounter, 17 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:31,285 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 1884 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]
[2025-04-28 21:21:31,287 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 356 states.
[2025-04-28 21:21:31,623 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 349.
[2025-04-28 21:21:31,626 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 349 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 81 states have internal predecessors, (82), 306 states have call successors, (318), 14 states have call predecessors, (318), 20 states have return successors, (1444), 254 states have call predecessors, (1444), 306 states have call successors, (1444)
[2025-04-28 21:21:31,643 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1844 transitions.
[2025-04-28 21:21:31,643 INFO  L79                 Accepts]: Start accepts. Automaton has 349 states and 1844 transitions. Word has length 24
[2025-04-28 21:21:31,644 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:31,644 INFO  L485      AbstractCegarLoop]: Abstraction has 349 states and 1844 transitions.
[2025-04-28 21:21:31,644 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7)
[2025-04-28 21:21:31,645 INFO  L278                IsEmpty]: Start isEmpty. Operand 349 states and 1844 transitions.
[2025-04-28 21:21:31,664 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2025-04-28 21:21:31,664 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:31,664 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 21:21:31,666 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2025-04-28 21:21:31,666 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:31,669 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:31,672 INFO  L85        PathProgramCache]: Analyzing trace with hash 189709308, now seen corresponding path program 1 times
[2025-04-28 21:21:31,673 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:31,673 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955328296]
[2025-04-28 21:21:31,673 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:31,673 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:31,694 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:31,723 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:31,723 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:31,723 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:32,231 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 21:21:32,231 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:32,231 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955328296]
[2025-04-28 21:21:32,232 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955328296] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:32,232 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96636985]
[2025-04-28 21:21:32,232 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:32,232 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:32,236 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:32,240 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 21:21:32,245 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:32,320 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes.
[2025-04-28 21:21:32,411 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements.
[2025-04-28 21:21:32,411 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:32,411 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:32,418 INFO  L256         TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 15 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:32,436 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:32,554 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 21:21:32,554 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:33,968 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 21:21:33,968 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [96636985] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:33,968 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:33,969 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11
[2025-04-28 21:21:33,969 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136973477]
[2025-04-28 21:21:33,969 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:33,969 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2025-04-28 21:21:33,970 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:33,970 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2025-04-28 21:21:33,971 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:33,972 INFO  L87              Difference]: Start difference. First operand 349 states and 1844 transitions. Second operand  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10)
[2025-04-28 21:21:36,863 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:36,863 INFO  L93              Difference]: Finished difference Result 534 states and 4316 transitions.
[2025-04-28 21:21:36,863 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:21:36,864 INFO  L79                 Accepts]: Start accepts. Automaton has  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10) Word has length 24
[2025-04-28 21:21:36,864 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:36,915 INFO  L225             Difference]: With dead ends: 534
[2025-04-28 21:21:36,915 INFO  L226             Difference]: Without dead ends: 534
[2025-04-28 21:21:36,916 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:36,917 INFO  L437           NwaCegarLoop]: 307 mSDtfsCounter, 9 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2477 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:36,917 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 2477 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time]
[2025-04-28 21:21:36,918 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 534 states.
[2025-04-28 21:21:37,814 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 531.
[2025-04-28 21:21:37,819 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 531 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 112 states have internal predecessors, (114), 458 states have call successors, (474), 18 states have call predecessors, (474), 35 states have return successors, (3724), 401 states have call predecessors, (3724), 458 states have call successors, (3724)
[2025-04-28 21:21:37,853 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 4312 transitions.
[2025-04-28 21:21:37,854 INFO  L79                 Accepts]: Start accepts. Automaton has 531 states and 4312 transitions. Word has length 24
[2025-04-28 21:21:37,854 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:37,854 INFO  L485      AbstractCegarLoop]: Abstraction has 531 states and 4312 transitions.
[2025-04-28 21:21:37,854 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 3 states have call successors, (10)
[2025-04-28 21:21:37,854 INFO  L278                IsEmpty]: Start isEmpty. Operand 531 states and 4312 transitions.
[2025-04-28 21:21:37,879 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:37,880 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:37,880 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 21:21:37,888 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:38,080 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:38,082 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:38,083 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:38,083 INFO  L85        PathProgramCache]: Analyzing trace with hash -1399551294, now seen corresponding path program 1 times
[2025-04-28 21:21:38,083 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:38,083 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144183152]
[2025-04-28 21:21:38,083 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:38,083 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:38,101 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes.
[2025-04-28 21:21:38,137 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:38,137 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:38,137 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:38,453 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 21:21:38,453 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:38,453 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144183152]
[2025-04-28 21:21:38,453 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144183152] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:38,453 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:38,453 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:38,454 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120443424]
[2025-04-28 21:21:38,454 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:38,454 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:38,454 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:38,455 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:38,455 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:38,455 INFO  L87              Difference]: Start difference. First operand 531 states and 4312 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 21:21:39,984 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:39,984 INFO  L93              Difference]: Finished difference Result 538 states and 4339 transitions.
[2025-04-28 21:21:39,984 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:39,985 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 21:21:39,985 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:40,027 INFO  L225             Difference]: With dead ends: 538
[2025-04-28 21:21:40,027 INFO  L226             Difference]: Without dead ends: 537
[2025-04-28 21:21:40,028 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 21:21:40,028 INFO  L437           NwaCegarLoop]: 324 mSDtfsCounter, 9 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:40,029 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1738 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time]
[2025-04-28 21:21:40,031 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 537 states.
[2025-04-28 21:21:40,800 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 535.
[2025-04-28 21:21:40,806 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 535 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 112 states have internal predecessors, (114), 462 states have call successors, (478), 18 states have call predecessors, (478), 35 states have return successors, (3742), 405 states have call predecessors, (3742), 462 states have call successors, (3742)
[2025-04-28 21:21:40,838 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 4334 transitions.
[2025-04-28 21:21:40,839 INFO  L79                 Accepts]: Start accepts. Automaton has 535 states and 4334 transitions. Word has length 21
[2025-04-28 21:21:40,839 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:40,839 INFO  L485      AbstractCegarLoop]: Abstraction has 535 states and 4334 transitions.
[2025-04-28 21:21:40,839 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 21:21:40,839 INFO  L278                IsEmpty]: Start isEmpty. Operand 535 states and 4334 transitions.
[2025-04-28 21:21:40,865 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2025-04-28 21:21:40,865 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:40,866 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:40,866 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2025-04-28 21:21:40,867 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:40,868 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:40,869 INFO  L85        PathProgramCache]: Analyzing trace with hash -538323094, now seen corresponding path program 1 times
[2025-04-28 21:21:40,870 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:40,870 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201691602]
[2025-04-28 21:21:40,870 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:40,870 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:40,901 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes.
[2025-04-28 21:21:40,918 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements.
[2025-04-28 21:21:40,918 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:40,918 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:41,306 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 21:21:41,306 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:41,306 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201691602]
[2025-04-28 21:21:41,306 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201691602] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:41,306 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:41,307 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:41,308 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115285405]
[2025-04-28 21:21:41,308 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:41,308 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:41,308 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:41,309 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:41,311 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:41,312 INFO  L87              Difference]: Start difference. First operand 535 states and 4334 transitions. Second operand  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7)
[2025-04-28 21:21:42,692 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:42,692 INFO  L93              Difference]: Finished difference Result 609 states and 7208 transitions.
[2025-04-28 21:21:42,693 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:42,693 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 27
[2025-04-28 21:21:42,693 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:42,763 INFO  L225             Difference]: With dead ends: 609
[2025-04-28 21:21:42,763 INFO  L226             Difference]: Without dead ends: 609
[2025-04-28 21:21:42,763 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 21:21:42,764 INFO  L437           NwaCegarLoop]: 289 mSDtfsCounter, 1 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:42,765 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1593 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2025-04-28 21:21:42,766 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 609 states.
[2025-04-28 21:21:44,407 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 604.
[2025-04-28 21:21:44,414 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 604 states, 64 states have (on average 2.0625) internal successors, (132), 130 states have internal predecessors, (132), 495 states have call successors, (511), 18 states have call predecessors, (511), 53 states have return successors, (6549), 456 states have call predecessors, (6549), 495 states have call successors, (6549)
[2025-04-28 21:21:44,468 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 7192 transitions.
[2025-04-28 21:21:44,468 INFO  L79                 Accepts]: Start accepts. Automaton has 604 states and 7192 transitions. Word has length 27
[2025-04-28 21:21:44,469 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:44,469 INFO  L485      AbstractCegarLoop]: Abstraction has 604 states and 7192 transitions.
[2025-04-28 21:21:44,469 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7)
[2025-04-28 21:21:44,469 INFO  L278                IsEmpty]: Start isEmpty. Operand 604 states and 7192 transitions.
[2025-04-28 21:21:44,491 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2025-04-28 21:21:44,493 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:44,493 INFO  L218           NwaCegarLoop]: trace histogram [3, 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 21:21:44,493 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2025-04-28 21:21:44,493 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:44,494 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:44,495 INFO  L85        PathProgramCache]: Analyzing trace with hash 1578601506, now seen corresponding path program 2 times
[2025-04-28 21:21:44,495 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:44,495 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580109312]
[2025-04-28 21:21:44,495 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:44,495 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:44,511 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes.
[2025-04-28 21:21:44,541 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements.
[2025-04-28 21:21:44,541 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:44,541 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:44,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:44,973 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:44,974 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580109312]
[2025-04-28 21:21:44,974 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580109312] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:44,974 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541240113]
[2025-04-28 21:21:44,974 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:44,974 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:44,977 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:44,980 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 21:21:44,983 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:45,048 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes.
[2025-04-28 21:21:45,123 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements.
[2025-04-28 21:21:45,123 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:45,123 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:45,126 INFO  L256         TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 19 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:45,129 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:45,313 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:45,313 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:47,407 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:47,407 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [541240113] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:47,407 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:47,407 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19
[2025-04-28 21:21:47,407 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007640017]
[2025-04-28 21:21:47,408 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:47,409 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2025-04-28 21:21:47,409 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:47,410 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2025-04-28 21:21:47,410 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:21:47,410 INFO  L87              Difference]: Start difference. First operand 604 states and 7192 transitions. Second operand  has 19 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (17), 13 states have call predecessors, (17), 4 states have call successors, (17)
