/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 22:57:58,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 22:57:58,772 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 22:57:58,777 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 22:57:58,778 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 22:57:58,801 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 22:57:58,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 22:57:58,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 22:57:58,802 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 22:57:58,806 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 22:57:58,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 22:57:58,806 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 22:57:58,807 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 22:57:58,808 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 22:57:58,808 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 22:57:58,808 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 22:57:58,808 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 22:57:58,809 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 22:57:58,809 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 22:57:58,810 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 22:57:58,810 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 22:57:58,810 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 22:57:58,810 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 22:57:58,811 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 22:57:58,811 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 22:57:58,811 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 22:57:58,811 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 22:57:58,811 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 22:57:58,812 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 22:57:58,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 22:57:58,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 22:57:58,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 22:57:58,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:57:58,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 22:57:58,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 22:57:58,813 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 22:57:58,813 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 22:57:58,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 22:57:58,813 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 22:57:58,814 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 22:57:58,814 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 22:57:58,814 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 22:57:58,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 22:57:58,814 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 22:57:59,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 22:57:59,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 22:57:59,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 22:57:59,043 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 22:57:59,044 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 22:57:59,044 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2023-12-15 22:58:00,174 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 22:58:00,431 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 22:58:00,434 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2023-12-15 22:58:00,440 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298522bfe/7fb0d7457aa8488fb64145b52e223b64/FLAGa0f0311a0 [2023-12-15 22:58:00,455 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298522bfe/7fb0d7457aa8488fb64145b52e223b64 [2023-12-15 22:58:00,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 22:58:00,464 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 22:58:00,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 22:58:00,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 22:58:00,478 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 22:58:00,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37a32c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00, skipping insertion in model container [2023-12-15 22:58:00,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,512 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 22:58:00,619 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c[975,988] [2023-12-15 22:58:00,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:58:00,630 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 22:58:00,640 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c[975,988] [2023-12-15 22:58:00,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 22:58:00,649 INFO L206 MainTranslator]: Completed translation [2023-12-15 22:58:00,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00 WrapperNode [2023-12-15 22:58:00,650 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 22:58:00,651 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 22:58:00,651 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 22:58:00,651 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 22:58:00,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,676 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-12-15 22:58:00,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 22:58:00,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 22:58:00,677 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 22:58:00,677 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 22:58:00,683 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,684 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,692 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-15 22:58:00,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,692 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,694 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,695 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,697 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 22:58:00,697 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 22:58:00,698 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 22:58:00,698 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 22:58:00,698 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (1/1) ... [2023-12-15 22:58:00,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 22:58:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:00,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 22:58:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 22:58:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-12-15 22:58:00,779 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-12-15 22:58:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 22:58:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-12-15 22:58:00,779 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-12-15 22:58:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 22:58:00,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 22:58:00,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 22:58:00,823 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 22:58:00,825 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 22:58:00,945 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 22:58:00,961 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 22:58:00,961 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-15 22:58:00,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:58:00 BoogieIcfgContainer [2023-12-15 22:58:00,961 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 22:58:00,963 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 22:58:00,963 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 22:58:00,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 22:58:00,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:58:00" (1/3) ... [2023-12-15 22:58:00,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e1b2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:58:00, skipping insertion in model container [2023-12-15 22:58:00,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:58:00" (2/3) ... [2023-12-15 22:58:00,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e1b2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:58:00, skipping insertion in model container [2023-12-15 22:58:00,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:58:00" (3/3) ... [2023-12-15 22:58:00,967 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2023-12-15 22:58:00,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 22:58:00,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 22:58:01,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 22:58:01,022 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@510ebd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 22:58:01,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 22:58:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 22:58:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 22:58:01,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:01,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:01,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:01,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1415048223, now seen corresponding path program 1 times [2023-12-15 22:58:01,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:01,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806714126] [2023-12-15 22:58:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:01,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:01,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:58:01,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:01,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806714126] [2023-12-15 22:58:01,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806714126] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:58:01,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:58:01,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 22:58:01,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105788181] [2023-12-15 22:58:01,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:58:01,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 22:58:01,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:01,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 22:58:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 22:58:01,634 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:58:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:01,717 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-12-15 22:58:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 22:58:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-15 22:58:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:01,724 INFO L225 Difference]: With dead ends: 32 [2023-12-15 22:58:01,724 INFO L226 Difference]: Without dead ends: 23 [2023-12-15 22:58:01,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-15 22:58:01,730 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:01,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 76 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:58:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-15 22:58:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-15 22:58:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-15 22:58:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-12-15 22:58:01,759 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2023-12-15 22:58:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:01,759 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-12-15 22:58:01,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:58:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-12-15 22:58:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-15 22:58:01,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:01,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:01,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 22:58:01,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:01,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash -168268323, now seen corresponding path program 1 times [2023-12-15 22:58:01,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:01,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5108229] [2023-12-15 22:58:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:01,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:01,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:58:01,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:01,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5108229] [2023-12-15 22:58:01,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5108229] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:58:01,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:58:01,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 22:58:01,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757815420] [2023-12-15 22:58:01,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:58:01,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 22:58:01,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:01,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 22:58:01,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 22:58:01,958 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:58:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:02,028 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-12-15 22:58:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 22:58:02,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-15 22:58:02,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:02,030 INFO L225 Difference]: With dead ends: 29 [2023-12-15 22:58:02,030 INFO L226 Difference]: Without dead ends: 25 [2023-12-15 22:58:02,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:58:02,032 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:02,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:58:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-15 22:58:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-12-15 22:58:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-15 22:58:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-12-15 22:58:02,038 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2023-12-15 22:58:02,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:02,039 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-12-15 22:58:02,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 22:58:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-12-15 22:58:02,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-15 22:58:02,040 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:02,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:02,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 22:58:02,040 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:02,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:02,040 INFO L85 PathProgramCache]: Analyzing trace with hash 236008797, now seen corresponding path program 1 times [2023-12-15 22:58:02,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:02,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865976506] [2023-12-15 22:58:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:02,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:58:02,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:02,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865976506] [2023-12-15 22:58:02,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865976506] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:58:02,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:58:02,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 22:58:02,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87070400] [2023-12-15 22:58:02,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:58:02,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 22:58:02,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:02,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 22:58:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:58:02,154 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-12-15 22:58:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:02,174 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-12-15 22:58:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 22:58:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2023-12-15 22:58:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:02,176 INFO L225 Difference]: With dead ends: 37 [2023-12-15 22:58:02,176 INFO L226 Difference]: Without dead ends: 25 [2023-12-15 22:58:02,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:58:02,177 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:02,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 62 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:58:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-15 22:58:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-12-15 22:58:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-15 22:58:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-12-15 22:58:02,181 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2023-12-15 22:58:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:02,181 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-12-15 22:58:02,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-12-15 22:58:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-12-15 22:58:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 22:58:02,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:02,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:02,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 22:58:02,182 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:02,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1342568457, now seen corresponding path program 1 times [2023-12-15 22:58:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:02,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329350360] [2023-12-15 22:58:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 22:58:02,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329350360] [2023-12-15 22:58:02,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329350360] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:58:02,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:58:02,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-15 22:58:02,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345813056] [2023-12-15 22:58:02,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:58:02,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-15 22:58:02,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-15 22:58:02,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-15 22:58:02,440 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:58:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:02,521 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-12-15 22:58:02,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 22:58:02,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-15 22:58:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:02,522 INFO L225 Difference]: With dead ends: 32 [2023-12-15 22:58:02,522 INFO L226 Difference]: Without dead ends: 28 [2023-12-15 22:58:02,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-15 22:58:02,530 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:02,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 75 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:58:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-15 22:58:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-12-15 22:58:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-15 22:58:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-15 22:58:02,540 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2023-12-15 22:58:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:02,541 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-15 22:58:02,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 22:58:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-15 22:58:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-15 22:58:02,542 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:02,542 INFO L195 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] [2023-12-15 22:58:02,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-15 22:58:02,543 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:02,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash -246412613, now seen corresponding path program 1 times [2023-12-15 22:58:02,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:02,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121502002] [2023-12-15 22:58:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:02,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:58:02,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:02,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121502002] [2023-12-15 22:58:02,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121502002] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 22:58:02,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 22:58:02,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 22:58:02,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855263928] [2023-12-15 22:58:02,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 22:58:02,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-15 22:58:02,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:02,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-15 22:58:02,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:58:02,613 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 22:58:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:02,643 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-12-15 22:58:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 22:58:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-12-15 22:58:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:02,645 INFO L225 Difference]: With dead ends: 38 [2023-12-15 22:58:02,645 INFO L226 Difference]: Without dead ends: 26 [2023-12-15 22:58:02,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-15 22:58:02,648 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:02,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 22:58:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-15 22:58:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-15 22:58:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-15 22:58:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-12-15 22:58:02,653 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2023-12-15 22:58:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:02,653 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-12-15 22:58:02,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 22:58:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-12-15 22:58:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 22:58:02,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:02,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:02,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-15 22:58:02,656 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:02,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:02,657 INFO L85 PathProgramCache]: Analyzing trace with hash -962722745, now seen corresponding path program 1 times [2023-12-15 22:58:02,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:02,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926777375] [2023-12-15 22:58:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:02,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:58:02,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926777375] [2023-12-15 22:58:02,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926777375] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826191543] [2023-12-15 22:58:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:02,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:02,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:03,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:03,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 22:58:03,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-15 22:58:03,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 22:58:03,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 22:58:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826191543] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:03,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:03,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2023-12-15 22:58:03,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342767335] [2023-12-15 22:58:03,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:03,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-15 22:58:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-15 22:58:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-12-15 22:58:03,646 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-15 22:58:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:03,789 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-12-15 22:58:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 22:58:03,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 25 [2023-12-15 22:58:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:03,790 INFO L225 Difference]: With dead ends: 38 [2023-12-15 22:58:03,790 INFO L226 Difference]: Without dead ends: 34 [2023-12-15 22:58:03,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-12-15 22:58:03,792 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:03,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 112 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:58:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-15 22:58:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-12-15 22:58:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-15 22:58:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-12-15 22:58:03,800 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2023-12-15 22:58:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:03,800 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-12-15 22:58:03,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-15 22:58:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-12-15 22:58:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-15 22:58:03,801 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:03,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:03,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:04,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-15 22:58:04,002 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:04,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash -503357871, now seen corresponding path program 1 times [2023-12-15 22:58:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:04,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182703028] [2023-12-15 22:58:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:04,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:04,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:04,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:04,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:04,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 22:58:04,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:04,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182703028] [2023-12-15 22:58:04,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182703028] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:04,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126025081] [2023-12-15 22:58:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:04,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:04,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:04,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 22:58:04,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-15 22:58:04,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 22:58:04,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 22:58:04,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126025081] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:04,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:04,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 24 [2023-12-15 22:58:04,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488767270] [2023-12-15 22:58:04,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:04,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 22:58:04,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 22:58:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-12-15 22:58:04,862 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 17 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-15 22:58:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:05,096 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-12-15 22:58:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-15 22:58:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 17 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 32 [2023-12-15 22:58:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:05,097 INFO L225 Difference]: With dead ends: 44 [2023-12-15 22:58:05,097 INFO L226 Difference]: Without dead ends: 40 [2023-12-15 22:58:05,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 22:58:05,098 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:05,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 155 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:58:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-15 22:58:05,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-12-15 22:58:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-15 22:58:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-12-15 22:58:05,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 32 [2023-12-15 22:58:05,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:05,102 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-12-15 22:58:05,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 17 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-15 22:58:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-12-15 22:58:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-15 22:58:05,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:05,103 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:05,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:05,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-15 22:58:05,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:05,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1867179313, now seen corresponding path program 2 times [2023-12-15 22:58:05,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:05,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725393656] [2023-12-15 22:58:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:05,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:05,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:05,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:05,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:05,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:05,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 22:58:05,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725393656] [2023-12-15 22:58:05,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725393656] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875470773] [2023-12-15 22:58:05,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:58:05,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:05,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:05,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:05,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 22:58:05,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:58:05,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:05,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-15 22:58:05,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-15 22:58:05,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 22:58:06,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875470773] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:06,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:06,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 28 [2023-12-15 22:58:06,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986360287] [2023-12-15 22:58:06,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:06,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-15 22:58:06,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-15 22:58:06,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-12-15 22:58:06,372 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-15 22:58:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:06,579 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-12-15 22:58:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 22:58:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 39 [2023-12-15 22:58:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:06,580 INFO L225 Difference]: With dead ends: 50 [2023-12-15 22:58:06,580 INFO L226 Difference]: Without dead ends: 46 [2023-12-15 22:58:06,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-12-15 22:58:06,581 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:06,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 194 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 22:58:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-15 22:58:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2023-12-15 22:58:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-15 22:58:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-12-15 22:58:06,584 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2023-12-15 22:58:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:06,584 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-12-15 22:58:06,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 20 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-15 22:58:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-12-15 22:58:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-15 22:58:06,585 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:06,585 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:06,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 22:58:06,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:06,790 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:06,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2003597525, now seen corresponding path program 2 times [2023-12-15 22:58:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:06,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062018959] [2023-12-15 22:58:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:06,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:06,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:07,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:07,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:07,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:07,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-15 22:58:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062018959] [2023-12-15 22:58:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062018959] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209402344] [2023-12-15 22:58:07,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:58:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:07,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:07,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:07,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 22:58:07,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:58:07,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:07,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-15 22:58:07,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-15 22:58:07,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 22:58:08,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209402344] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:08,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:08,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 30 [2023-12-15 22:58:08,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830716216] [2023-12-15 22:58:08,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:08,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-15 22:58:08,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-15 22:58:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-12-15 22:58:08,135 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-15 22:58:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:08,481 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2023-12-15 22:58:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 22:58:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 46 [2023-12-15 22:58:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:08,482 INFO L225 Difference]: With dead ends: 56 [2023-12-15 22:58:08,482 INFO L226 Difference]: Without dead ends: 52 [2023-12-15 22:58:08,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-12-15 22:58:08,483 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:08,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 217 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:58:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-15 22:58:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2023-12-15 22:58:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-15 22:58:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-12-15 22:58:08,486 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 46 [2023-12-15 22:58:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:08,486 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-12-15 22:58:08,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-15 22:58:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-12-15 22:58:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-15 22:58:08,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:08,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:08,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:08,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:08,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:08,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash -48123749, now seen corresponding path program 3 times [2023-12-15 22:58:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:08,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337606616] [2023-12-15 22:58:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:08,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:08,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:08,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:08,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:08,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:09,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:09,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-15 22:58:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337606616] [2023-12-15 22:58:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337606616] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729782998] [2023-12-15 22:58:09,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:58:09,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:09,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:09,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 22:58:09,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-15 22:58:09,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:09,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-15 22:58:09,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-15 22:58:09,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-15 22:58:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729782998] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:10,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:10,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 24] total 34 [2023-12-15 22:58:10,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927462838] [2023-12-15 22:58:10,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:10,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-15 22:58:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-15 22:58:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2023-12-15 22:58:10,260 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 34 states, 32 states have (on average 1.75) internal successors, (56), 24 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-15 22:58:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:10,636 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2023-12-15 22:58:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 22:58:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.75) internal successors, (56), 24 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 53 [2023-12-15 22:58:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:10,637 INFO L225 Difference]: With dead ends: 62 [2023-12-15 22:58:10,637 INFO L226 Difference]: Without dead ends: 58 [2023-12-15 22:58:10,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2023-12-15 22:58:10,638 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:10,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 251 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 22:58:10,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-15 22:58:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2023-12-15 22:58:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-15 22:58:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-12-15 22:58:10,642 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 53 [2023-12-15 22:58:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:10,642 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-12-15 22:58:10,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.75) internal successors, (56), 24 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-15 22:58:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-12-15 22:58:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-15 22:58:10,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:10,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:10,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:10,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-15 22:58:10,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:10,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2001067387, now seen corresponding path program 3 times [2023-12-15 22:58:10,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:10,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751960914] [2023-12-15 22:58:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:10,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:11,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:11,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:11,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:11,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:11,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:11,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:11,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-15 22:58:11,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:11,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751960914] [2023-12-15 22:58:11,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751960914] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:11,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538158172] [2023-12-15 22:58:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:58:11,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:11,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:11,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:11,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 22:58:11,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-15 22:58:11,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:11,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-15 22:58:11,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-15 22:58:11,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 22:58:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538158172] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:12,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 27] total 36 [2023-12-15 22:58:12,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265244332] [2023-12-15 22:58:12,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:12,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-15 22:58:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-15 22:58:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2023-12-15 22:58:12,863 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-12-15 22:58:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:13,365 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2023-12-15 22:58:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-15 22:58:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 60 [2023-12-15 22:58:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:13,366 INFO L225 Difference]: With dead ends: 68 [2023-12-15 22:58:13,366 INFO L226 Difference]: Without dead ends: 64 [2023-12-15 22:58:13,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2023-12-15 22:58:13,367 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:13,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 329 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:58:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-15 22:58:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2023-12-15 22:58:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-15 22:58:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-12-15 22:58:13,371 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 60 [2023-12-15 22:58:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:13,371 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-12-15 22:58:13,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 25 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-12-15 22:58:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-12-15 22:58:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-15 22:58:13,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:13,372 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:13,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:13,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:13,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:13,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:13,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1494415739, now seen corresponding path program 4 times [2023-12-15 22:58:13,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:13,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105005166] [2023-12-15 22:58:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:13,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:13,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:13,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:13,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:14,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:14,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:14,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-15 22:58:14,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105005166] [2023-12-15 22:58:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105005166] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571358591] [2023-12-15 22:58:14,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:58:14,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:14,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:14,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 22:58:14,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:58:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:14,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-15 22:58:14,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-15 22:58:14,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-15 22:58:15,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571358591] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:15,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:15,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 30] total 40 [2023-12-15 22:58:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260262463] [2023-12-15 22:58:15,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:15,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-15 22:58:15,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-15 22:58:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2023-12-15 22:58:15,665 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 28 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-12-15 22:58:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:16,211 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2023-12-15 22:58:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-15 22:58:16,212 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 28 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) Word has length 67 [2023-12-15 22:58:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:16,212 INFO L225 Difference]: With dead ends: 74 [2023-12-15 22:58:16,212 INFO L226 Difference]: Without dead ends: 70 [2023-12-15 22:58:16,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2023-12-15 22:58:16,214 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:16,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 400 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:58:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-15 22:58:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2023-12-15 22:58:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-15 22:58:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-12-15 22:58:16,217 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 67 [2023-12-15 22:58:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:16,217 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-12-15 22:58:16,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 28 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-12-15 22:58:16,218 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-12-15 22:58:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-15 22:58:16,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:16,218 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:16,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:16,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:16,422 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:16,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1411305567, now seen corresponding path program 4 times [2023-12-15 22:58:16,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:16,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705195] [2023-12-15 22:58:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:16,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:16,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:16,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:16,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:16,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:16,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:17,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:17,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-15 22:58:17,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705195] [2023-12-15 22:58:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705195] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829710563] [2023-12-15 22:58:17,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 22:58:17,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:17,216 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:17,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 22:58:17,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 22:58:17,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:17,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-15 22:58:17,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-15 22:58:17,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-15 22:58:18,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829710563] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:18,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:18,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 33] total 43 [2023-12-15 22:58:18,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248180344] [2023-12-15 22:58:18,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:18,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-15 22:58:18,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-15 22:58:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2023-12-15 22:58:18,845 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 30 states have internal predecessors, (71), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-15 22:58:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:19,552 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2023-12-15 22:58:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-15 22:58:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 30 states have internal predecessors, (71), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) Word has length 74 [2023-12-15 22:58:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:19,553 INFO L225 Difference]: With dead ends: 80 [2023-12-15 22:58:19,553 INFO L226 Difference]: Without dead ends: 76 [2023-12-15 22:58:19,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=3681, Unknown=0, NotChecked=0, Total=4032 [2023-12-15 22:58:19,555 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:19,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 417 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:58:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-15 22:58:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2023-12-15 22:58:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-15 22:58:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2023-12-15 22:58:19,558 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 74 [2023-12-15 22:58:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:19,558 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2023-12-15 22:58:19,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 30 states have internal predecessors, (71), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-15 22:58:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2023-12-15 22:58:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-15 22:58:19,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:19,559 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:19,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:19,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-15 22:58:19,760 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:19,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1222670609, now seen corresponding path program 5 times [2023-12-15 22:58:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:19,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300638714] [2023-12-15 22:58:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:19,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:19,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-15 22:58:20,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300638714] [2023-12-15 22:58:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300638714] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013829001] [2023-12-15 22:58:20,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:58:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:20,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:20,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 22:58:20,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-15 22:58:20,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:20,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-15 22:58:20,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-15 22:58:21,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-15 22:58:22,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013829001] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:22,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:22,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 36] total 46 [2023-12-15 22:58:22,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633180933] [2023-12-15 22:58:22,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:22,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-15 22:58:22,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:22,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-15 22:58:22,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1916, Unknown=0, NotChecked=0, Total=2070 [2023-12-15 22:58:22,528 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 46 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 32 states have internal predecessors, (76), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-12-15 22:58:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:23,152 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-12-15 22:58:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-15 22:58:23,153 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 32 states have internal predecessors, (76), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) Word has length 81 [2023-12-15 22:58:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:23,153 INFO L225 Difference]: With dead ends: 86 [2023-12-15 22:58:23,153 INFO L226 Difference]: Without dead ends: 82 [2023-12-15 22:58:23,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=382, Invalid=4174, Unknown=0, NotChecked=0, Total=4556 [2023-12-15 22:58:23,155 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:23,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 436 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-15 22:58:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-15 22:58:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2023-12-15 22:58:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-15 22:58:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-12-15 22:58:23,158 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 81 [2023-12-15 22:58:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:23,158 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-12-15 22:58:23,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 32 states have internal predecessors, (76), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-12-15 22:58:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-12-15 22:58:23,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-15 22:58:23,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:23,159 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:23,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:23,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-15 22:58:23,364 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:23,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash 51720377, now seen corresponding path program 5 times [2023-12-15 22:58:23,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:23,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203078400] [2023-12-15 22:58:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:23,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:23,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:23,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:23,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:23,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:23,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:24,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:24,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:24,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:24,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:24,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:24,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-15 22:58:24,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:24,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203078400] [2023-12-15 22:58:24,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203078400] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:24,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391733536] [2023-12-15 22:58:24,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 22:58:24,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:24,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:24,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 22:58:24,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-15 22:58:24,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:24,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 104 conjunts are in the unsatisfiable core [2023-12-15 22:58:24,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-15 22:58:24,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-15 22:58:26,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391733536] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:26,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 39] total 48 [2023-12-15 22:58:26,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040416101] [2023-12-15 22:58:26,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-15 22:58:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-15 22:58:26,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2097, Unknown=0, NotChecked=0, Total=2256 [2023-12-15 22:58:26,353 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 33 states have internal predecessors, (80), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-12-15 22:58:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:27,209 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2023-12-15 22:58:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-15 22:58:27,209 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 33 states have internal predecessors, (80), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) Word has length 88 [2023-12-15 22:58:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:27,210 INFO L225 Difference]: With dead ends: 92 [2023-12-15 22:58:27,210 INFO L226 Difference]: Without dead ends: 88 [2023-12-15 22:58:27,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2023-12-15 22:58:27,213 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:27,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 601 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 22:58:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-15 22:58:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2023-12-15 22:58:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-15 22:58:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2023-12-15 22:58:27,223 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 88 [2023-12-15 22:58:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:27,223 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2023-12-15 22:58:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 33 states have internal predecessors, (80), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-12-15 22:58:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2023-12-15 22:58:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-15 22:58:27,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:27,224 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:27,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-15 22:58:27,429 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:27,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash -170667559, now seen corresponding path program 6 times [2023-12-15 22:58:27,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:27,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031280414] [2023-12-15 22:58:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:27,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:27,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:27,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:27,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:27,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:27,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-15 22:58:28,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:28,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031280414] [2023-12-15 22:58:28,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031280414] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:28,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703987899] [2023-12-15 22:58:28,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:58:28,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:28,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:28,547 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:28,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 22:58:28,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-15 22:58:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:28,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 112 conjunts are in the unsatisfiable core [2023-12-15 22:58:28,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-12-15 22:58:28,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-15 22:58:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703987899] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:30,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:30,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 42] total 52 [2023-12-15 22:58:30,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108951073] [2023-12-15 22:58:30,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:30,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-15 22:58:30,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:30,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-15 22:58:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2476, Unknown=0, NotChecked=0, Total=2652 [2023-12-15 22:58:30,691 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 52 states, 50 states have (on average 1.72) internal successors, (86), 36 states have internal predecessors, (86), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-12-15 22:58:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:31,448 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2023-12-15 22:58:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-15 22:58:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.72) internal successors, (86), 36 states have internal predecessors, (86), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) Word has length 95 [2023-12-15 22:58:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:31,449 INFO L225 Difference]: With dead ends: 98 [2023-12-15 22:58:31,449 INFO L226 Difference]: Without dead ends: 94 [2023-12-15 22:58:31,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=471, Invalid=5535, Unknown=0, NotChecked=0, Total=6006 [2023-12-15 22:58:31,451 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:31,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 651 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 22:58:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-15 22:58:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2023-12-15 22:58:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-15 22:58:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-12-15 22:58:31,454 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 95 [2023-12-15 22:58:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:31,454 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-12-15 22:58:31,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.72) internal successors, (86), 36 states have internal predecessors, (86), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-12-15 22:58:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-12-15 22:58:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-15 22:58:31,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:31,455 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:31,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:31,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-15 22:58:31,662 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:31,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash -291970157, now seen corresponding path program 6 times [2023-12-15 22:58:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:31,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98118272] [2023-12-15 22:58:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:31,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:31,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:31,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-12-15 22:58:32,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:32,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98118272] [2023-12-15 22:58:32,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98118272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:32,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679759731] [2023-12-15 22:58:32,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 22:58:32,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:32,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:32,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:32,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 22:58:32,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-15 22:58:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:32,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-15 22:58:32,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-12-15 22:58:33,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-15 22:58:35,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679759731] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:35,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:35,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 45] total 54 [2023-12-15 22:58:35,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118797432] [2023-12-15 22:58:35,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:35,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-15 22:58:35,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-15 22:58:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2681, Unknown=0, NotChecked=0, Total=2862 [2023-12-15 22:58:35,139 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 54 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-12-15 22:58:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:36,070 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2023-12-15 22:58:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-15 22:58:36,070 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) Word has length 102 [2023-12-15 22:58:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:36,071 INFO L225 Difference]: With dead ends: 104 [2023-12-15 22:58:36,071 INFO L226 Difference]: Without dead ends: 100 [2023-12-15 22:58:36,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=528, Invalid=6278, Unknown=0, NotChecked=0, Total=6806 [2023-12-15 22:58:36,073 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:36,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 574 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 22:58:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-15 22:58:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2023-12-15 22:58:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-15 22:58:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-12-15 22:58:36,075 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 102 [2023-12-15 22:58:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:36,076 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-12-15 22:58:36,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 37 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-12-15 22:58:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-12-15 22:58:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-15 22:58:36,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:36,080 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:36,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:36,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-15 22:58:36,286 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:36,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1832089789, now seen corresponding path program 7 times [2023-12-15 22:58:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:36,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015399522] [2023-12-15 22:58:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:36,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:36,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:36,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:36,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:36,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-12-15 22:58:37,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:37,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015399522] [2023-12-15 22:58:37,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015399522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:37,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554949552] [2023-12-15 22:58:37,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 22:58:37,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:37,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:37,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:37,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-15 22:58:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:37,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 128 conjunts are in the unsatisfiable core [2023-12-15 22:58:37,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-15 22:58:38,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-15 22:58:41,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554949552] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:41,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:41,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 48] total 58 [2023-12-15 22:58:41,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688632089] [2023-12-15 22:58:41,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:41,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-15 22:58:41,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-15 22:58:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3108, Unknown=0, NotChecked=0, Total=3306 [2023-12-15 22:58:41,066 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 40 states have internal predecessors, (96), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-12-15 22:58:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:42,137 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2023-12-15 22:58:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-15 22:58:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 40 states have internal predecessors, (96), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 109 [2023-12-15 22:58:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:42,138 INFO L225 Difference]: With dead ends: 110 [2023-12-15 22:58:42,138 INFO L226 Difference]: Without dead ends: 106 [2023-12-15 22:58:42,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=568, Invalid=7088, Unknown=0, NotChecked=0, Total=7656 [2023-12-15 22:58:42,139 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:42,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 659 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 22:58:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-15 22:58:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 65. [2023-12-15 22:58:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-15 22:58:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-12-15 22:58:42,142 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 109 [2023-12-15 22:58:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:42,143 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-12-15 22:58:42,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 40 states have internal predecessors, (96), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-12-15 22:58:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-12-15 22:58:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-15 22:58:42,144 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:42,144 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:42,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:42,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-15 22:58:42,348 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:42,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:42,348 INFO L85 PathProgramCache]: Analyzing trace with hash -900888339, now seen corresponding path program 7 times [2023-12-15 22:58:42,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:42,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925945865] [2023-12-15 22:58:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:42,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:42,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:42,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:42,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:42,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-12-15 22:58:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925945865] [2023-12-15 22:58:43,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925945865] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913582610] [2023-12-15 22:58:43,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 22:58:43,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:43,937 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:43,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-15 22:58:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:44,052 WARN L260 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 136 conjunts are in the unsatisfiable core [2023-12-15 22:58:44,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-12-15 22:58:44,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-15 22:58:47,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913582610] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:47,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:47,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 51] total 61 [2023-12-15 22:58:47,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618085138] [2023-12-15 22:58:47,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:47,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-15 22:58:47,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:47,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-15 22:58:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3453, Unknown=0, NotChecked=0, Total=3660 [2023-12-15 22:58:47,175 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 61 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 42 states have internal predecessors, (101), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) [2023-12-15 22:58:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:48,442 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2023-12-15 22:58:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-15 22:58:48,443 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 42 states have internal predecessors, (101), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) Word has length 116 [2023-12-15 22:58:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:48,443 INFO L225 Difference]: With dead ends: 116 [2023-12-15 22:58:48,443 INFO L226 Difference]: Without dead ends: 112 [2023-12-15 22:58:48,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=636, Invalid=8106, Unknown=0, NotChecked=0, Total=8742 [2023-12-15 22:58:48,444 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:48,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 908 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-15 22:58:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-15 22:58:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 68. [2023-12-15 22:58:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-15 22:58:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2023-12-15 22:58:48,455 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 116 [2023-12-15 22:58:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:48,457 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2023-12-15 22:58:48,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 42 states have internal predecessors, (101), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) [2023-12-15 22:58:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2023-12-15 22:58:48,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-15 22:58:48,458 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:48,458 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:48,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-15 22:58:48,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:48,663 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:48,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:48,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1888205011, now seen corresponding path program 8 times [2023-12-15 22:58:48,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:48,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266805042] [2023-12-15 22:58:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:48,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:48,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:49,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:50,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:50,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:50,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:50,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:50,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-12-15 22:58:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:50,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266805042] [2023-12-15 22:58:50,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266805042] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:50,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266390263] [2023-12-15 22:58:50,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:58:50,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:50,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:50,475 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:50,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-15 22:58:50,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:58:50,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:50,591 WARN L260 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 144 conjunts are in the unsatisfiable core [2023-12-15 22:58:50,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-12-15 22:58:50,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-15 22:58:53,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266390263] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:53,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:53,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 54] total 64 [2023-12-15 22:58:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660609611] [2023-12-15 22:58:53,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:53,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-15 22:58:53,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:53,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-15 22:58:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3812, Unknown=0, NotChecked=0, Total=4032 [2023-12-15 22:58:53,802 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 44 states have internal predecessors, (106), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-12-15 22:58:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:58:54,894 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2023-12-15 22:58:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-15 22:58:54,898 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 44 states have internal predecessors, (106), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) Word has length 123 [2023-12-15 22:58:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:58:54,898 INFO L225 Difference]: With dead ends: 122 [2023-12-15 22:58:54,898 INFO L226 Difference]: Without dead ends: 118 [2023-12-15 22:58:54,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=673, Invalid=8833, Unknown=0, NotChecked=0, Total=9506 [2023-12-15 22:58:54,900 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 22:58:54,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 771 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 22:58:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-15 22:58:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2023-12-15 22:58:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2023-12-15 22:58:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2023-12-15 22:58:54,910 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 123 [2023-12-15 22:58:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:58:54,910 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2023-12-15 22:58:54,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 44 states have internal predecessors, (106), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-12-15 22:58:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2023-12-15 22:58:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-15 22:58:54,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:58:54,911 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:58:54,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-15 22:58:55,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:55,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:58:55,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:58:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1048494279, now seen corresponding path program 8 times [2023-12-15 22:58:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:58:55,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045587965] [2023-12-15 22:58:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:58:55,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:58:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:55,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:58:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:55,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:55,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:55,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:55,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:58:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:58:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-15 22:58:56,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:58:56,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045587965] [2023-12-15 22:58:56,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045587965] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:58:56,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115998702] [2023-12-15 22:58:56,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 22:58:56,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:58:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:58:56,985 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:58:56,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-15 22:58:57,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 22:58:57,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:58:57,117 WARN L260 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 152 conjunts are in the unsatisfiable core [2023-12-15 22:58:57,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:58:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-12-15 22:58:57,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 22:58:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-15 22:58:59,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115998702] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 22:58:59,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 22:58:59,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 57] total 66 [2023-12-15 22:58:59,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315236382] [2023-12-15 22:58:59,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 22:58:59,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-12-15 22:58:59,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 22:58:59,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-12-15 22:58:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4065, Unknown=0, NotChecked=0, Total=4290 [2023-12-15 22:58:59,990 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 66 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 45 states have internal predecessors, (110), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-12-15 22:59:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 22:59:01,042 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-12-15 22:59:01,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-15 22:59:01,043 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 45 states have internal predecessors, (110), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) Word has length 130 [2023-12-15 22:59:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 22:59:01,044 INFO L225 Difference]: With dead ends: 128 [2023-12-15 22:59:01,044 INFO L226 Difference]: Without dead ends: 124 [2023-12-15 22:59:01,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=742, Invalid=9764, Unknown=0, NotChecked=0, Total=10506 [2023-12-15 22:59:01,069 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 25 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 22:59:01,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1018 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 22:59:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-15 22:59:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 74. [2023-12-15 22:59:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2023-12-15 22:59:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-12-15 22:59:01,073 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 130 [2023-12-15 22:59:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 22:59:01,073 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-12-15 22:59:01,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 45 states have internal predecessors, (110), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-12-15 22:59:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-12-15 22:59:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-15 22:59:01,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 22:59:01,074 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 22:59:01,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-15 22:59:01,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:59:01,277 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 22:59:01,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 22:59:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1461866089, now seen corresponding path program 9 times [2023-12-15 22:59:01,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 22:59:01,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508060524] [2023-12-15 22:59:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 22:59:01,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 22:59:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:01,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 22:59:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:01,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:02,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:02,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:02,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:02,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:02,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:02,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:02,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:02,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-15 22:59:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 22:59:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-12-15 22:59:03,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 22:59:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508060524] [2023-12-15 22:59:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508060524] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 22:59:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362645320] [2023-12-15 22:59:03,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 22:59:03,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:59:03,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 22:59:03,675 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 22:59:03,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process Received shutdown request... [2023-12-15 22:59:03,828 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:59:03,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-15 22:59:03,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 22:59:03,847 WARN L260 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 160 conjunts are in the unsatisfiable core [2023-12-15 22:59:03,851 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 22:59:03,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 22:59:03,870 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 22:59:03,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-15 22:59:04,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 22:59:04,071 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 138 with TraceHistMax 10,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 45 known predicates. [2023-12-15 22:59:04,075 INFO L445 BasicCegarLoop]: Path program histogram: [9, 8, 1, 1, 1, 1, 1] [2023-12-15 22:59:04,078 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 22:59:04,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:59:04 BoogieIcfgContainer [2023-12-15 22:59:04,079 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 22:59:04,083 INFO L158 Benchmark]: Toolchain (without parser) took 63616.10ms. Allocated memory was 235.9MB in the beginning and 759.2MB in the end (delta: 523.2MB). Free memory was 197.6MB in the beginning and 675.2MB in the end (delta: -477.6MB). Peak memory consumption was 46.7MB. Max. memory is 8.0GB. [2023-12-15 22:59:04,083 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 176.2MB. Free memory was 130.5MB in the beginning and 130.3MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 22:59:04,083 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.44ms. Allocated memory is still 235.9MB. Free memory was 197.6MB in the beginning and 186.6MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 22:59:04,083 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.82ms. Allocated memory is still 235.9MB. Free memory was 186.6MB in the beginning and 185.4MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 22:59:04,083 INFO L158 Benchmark]: Boogie Preprocessor took 20.13ms. Allocated memory is still 235.9MB. Free memory was 185.4MB in the beginning and 184.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-15 22:59:04,084 INFO L158 Benchmark]: RCFGBuilder took 263.88ms. Allocated memory is still 235.9MB. Free memory was 184.0MB in the beginning and 172.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 22:59:04,084 INFO L158 Benchmark]: TraceAbstraction took 63116.61ms. Allocated memory was 235.9MB in the beginning and 759.2MB in the end (delta: 523.2MB). Free memory was 171.4MB in the beginning and 675.2MB in the end (delta: -503.8MB). Peak memory consumption was 20.5MB. Max. memory is 8.0GB. [2023-12-15 22:59:04,088 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 176.2MB. Free memory was 130.5MB in the beginning and 130.3MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.44ms. Allocated memory is still 235.9MB. Free memory was 197.6MB in the beginning and 186.6MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.82ms. Allocated memory is still 235.9MB. Free memory was 186.6MB in the beginning and 185.4MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.13ms. Allocated memory is still 235.9MB. Free memory was 185.4MB in the beginning and 184.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 263.88ms. Allocated memory is still 235.9MB. Free memory was 184.0MB in the beginning and 172.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 63116.61ms. Allocated memory was 235.9MB in the beginning and 759.2MB in the end (delta: 523.2MB). Free memory was 171.4MB in the beginning and 675.2MB in the end (delta: -503.8MB). Peak memory consumption was 20.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 49). Cancelled while NwaCegarLoop was analyzing trace of length 138 with TraceHistMax 10,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 45 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 63.1s, OverallIterations: 22, TraceHistogramMax: 10, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 748 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 629 mSDsluCounter, 8054 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7640 mSDsCounter, 213 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14566 IncrementalHoareTripleChecker+Invalid, 14779 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 213 mSolverCounterUnsat, 414 mSDtfsCounter, 14566 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3582 GetRequests, 2537 SyntacticMatches, 0 SemanticMatches, 1045 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8662 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=21, InterpolantAutomatonStates: 472, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 446 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 44.0s InterpolantComputationTime, 2560 NumberOfCodeBlocks, 2560 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 3747 ConstructedInterpolants, 0 QuantifiedInterpolants, 21137 SizeOfPredicates, 184 NumberOfNonLiveVariables, 3032 ConjunctsInSsa, 1472 ConjunctsInUnsatCore, 53 InterpolantComputations, 5 PerfectInterpolantSequences, 3712/8896 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown