/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:19:36,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:19:36,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:19:36,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 01:19:36,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:19:36,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:19:36,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:19:36,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:19:36,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:19:36,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:19:36,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:19:36,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:19:36,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:19:36,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:19:36,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:19:36,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:19:36,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 01:19:36,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 01:19:36,767 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:19:36,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:19:36,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:19:36,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:19:36,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:19:36,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:19:36,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:19:36,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:19:36,770 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:19:36,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:19:36,771 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:19:36,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:19:36,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:19:36,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:19:36,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:19:36,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:19:36,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:19:36,772 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:19:36,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:19:36,772 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:19:36,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:19:36,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:19:36,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:19:36,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:19:36,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:19:36,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:19:36,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:19:36,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:19:36,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:19:36,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:19:36,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:19:36,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:19:36,774 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:19:36,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:19:36,775 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:19:36,775 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:19:37,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:19:37,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:19:37,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:19:37,026 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:19:37,026 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:19:37,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2023-03-31 01:19:38,150 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:19:38,320 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:19:38,321 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2023-03-31 01:19:38,325 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724ce11c9/70ae950ac13041b6895f6ea264327c8c/FLAGc186a9ee5 [2023-03-31 01:19:38,342 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724ce11c9/70ae950ac13041b6895f6ea264327c8c [2023-03-31 01:19:38,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:19:38,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:19:38,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:19:38,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:19:38,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:19:38,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfad07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38, skipping insertion in model container [2023-03-31 01:19:38,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:19:38,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:19:38,524 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2023-03-31 01:19:38,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:19:38,541 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:19:38,560 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2023-03-31 01:19:38,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:19:38,572 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:19:38,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38 WrapperNode [2023-03-31 01:19:38,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:19:38,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:19:38,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:19:38,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:19:38,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,606 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:19:38,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:19:38,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:19:38,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:19:38,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (1/1) ... [2023-03-31 01:19:38,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:19:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:19:38,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 01:19:38,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 01:19:38,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:19:38,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:19:38,690 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:19:38,690 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2023-03-31 01:19:38,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:19:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:19:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:19:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:19:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:19:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:19:38,756 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:19:38,758 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:19:38,884 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:19:38,892 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:19:38,893 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:19:38,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:19:38 BoogieIcfgContainer [2023-03-31 01:19:38,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:19:38,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:19:38,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:19:38,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:19:38,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:19:38" (1/3) ... [2023-03-31 01:19:38,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c770f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:19:38, skipping insertion in model container [2023-03-31 01:19:38,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:19:38" (2/3) ... [2023-03-31 01:19:38,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c770f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:19:38, skipping insertion in model container [2023-03-31 01:19:38,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:19:38" (3/3) ... [2023-03-31 01:19:38,904 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2023-03-31 01:19:38,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:19:38,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:19:38,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:19:38,967 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=LoopsAndPotentialCycles, 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;@37080a29, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:19:38,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:19:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 01:19:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 01:19:38,978 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:38,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:38,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:38,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash 156428420, now seen corresponding path program 1 times [2023-03-31 01:19:38,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:38,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513432969] [2023-03-31 01:19:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:38,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:39,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:39,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:39,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-03-31 01:19:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 01:19:39,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513432969] [2023-03-31 01:19:39,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513432969] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:19:39,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:19:39,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:19:39,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164464633] [2023-03-31 01:19:39,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:19:39,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:19:39,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:19:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:19:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:19:39,594 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 01:19:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:19:39,890 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-03-31 01:19:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 01:19:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-03-31 01:19:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:19:39,898 INFO L225 Difference]: With dead ends: 48 [2023-03-31 01:19:39,898 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 01:19:39,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:19:39,903 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:19:39,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 41 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:19:39,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 01:19:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-03-31 01:19:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-31 01:19:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-03-31 01:19:39,934 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 24 [2023-03-31 01:19:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:19:39,935 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-03-31 01:19:39,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 01:19:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-03-31 01:19:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 01:19:39,937 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:39,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:39,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:19:39,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:39,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1285538244, now seen corresponding path program 1 times [2023-03-31 01:19:39,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:39,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312808222] [2023-03-31 01:19:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:40,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:40,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:40,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-03-31 01:19:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:40,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-03-31 01:19:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 01:19:40,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:40,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312808222] [2023-03-31 01:19:40,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312808222] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:19:40,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852562253] [2023-03-31 01:19:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:40,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:19:40,153 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) [2023-03-31 01:19:40,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 01:19:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:40,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 01:19:40,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:19:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 01:19:40,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:19:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 01:19:40,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852562253] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:19:40,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:19:40,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 14 [2023-03-31 01:19:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577354359] [2023-03-31 01:19:40,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:19:40,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 01:19:40,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:19:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 01:19:40,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-03-31 01:19:40,417 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-31 01:19:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:19:40,722 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2023-03-31 01:19:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 01:19:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 30 [2023-03-31 01:19:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:19:40,725 INFO L225 Difference]: With dead ends: 56 [2023-03-31 01:19:40,725 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 01:19:40,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-03-31 01:19:40,728 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:19:40,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 62 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:19:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 01:19:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-03-31 01:19:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 01:19:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-03-31 01:19:40,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 30 [2023-03-31 01:19:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:19:40,747 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-03-31 01:19:40,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-31 01:19:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-03-31 01:19:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 01:19:40,751 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:40,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:40,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 01:19:40,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:40,957 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:40,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:40,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1029208082, now seen corresponding path program 1 times [2023-03-31 01:19:40,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:40,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762406723] [2023-03-31 01:19:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:40,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-31 01:19:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 01:19:41,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:41,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762406723] [2023-03-31 01:19:41,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762406723] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:19:41,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:19:41,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:19:41,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633622148] [2023-03-31 01:19:41,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:19:41,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:19:41,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:19:41,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:19:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:19:41,060 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 01:19:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:19:41,161 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-03-31 01:19:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:19:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-03-31 01:19:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:19:41,163 INFO L225 Difference]: With dead ends: 35 [2023-03-31 01:19:41,163 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 01:19:41,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:19:41,164 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:19:41,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:19:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 01:19:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 01:19:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 01:19:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-03-31 01:19:41,178 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 31 [2023-03-31 01:19:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:19:41,179 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-03-31 01:19:41,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 01:19:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-03-31 01:19:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 01:19:41,188 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:41,188 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:41,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:19:41,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:41,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1780942468, now seen corresponding path program 1 times [2023-03-31 01:19:41,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:41,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284039917] [2023-03-31 01:19:41,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:41,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-31 01:19:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-03-31 01:19:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-03-31 01:19:41,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284039917] [2023-03-31 01:19:41,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284039917] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:19:41,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859634957] [2023-03-31 01:19:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:41,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:19:41,411 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) [2023-03-31 01:19:41,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 01:19:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:41,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 01:19:41,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:19:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-03-31 01:19:41,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:19:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-03-31 01:19:41,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859634957] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:19:41,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:19:41,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2023-03-31 01:19:41,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744999896] [2023-03-31 01:19:41,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:19:41,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 01:19:41,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:19:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 01:19:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-03-31 01:19:41,767 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-31 01:19:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:19:41,914 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-03-31 01:19:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 01:19:41,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 51 [2023-03-31 01:19:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:19:41,917 INFO L225 Difference]: With dead ends: 50 [2023-03-31 01:19:41,917 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 01:19:41,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-03-31 01:19:41,921 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 01:19:41,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 37 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 01:19:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 01:19:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 01:19:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-31 01:19:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-03-31 01:19:41,930 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 51 [2023-03-31 01:19:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:19:41,932 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-03-31 01:19:41,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-31 01:19:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-03-31 01:19:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 01:19:41,934 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:41,934 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:41,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 01:19:42,140 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,SelfDestructingSolverStorable3 [2023-03-31 01:19:42,141 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:42,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:42,142 INFO L85 PathProgramCache]: Analyzing trace with hash 556765202, now seen corresponding path program 2 times [2023-03-31 01:19:42,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:42,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626012160] [2023-03-31 01:19:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:42,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:42,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:42,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:42,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:42,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-31 01:19:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 01:19:42,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:42,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626012160] [2023-03-31 01:19:42,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626012160] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:19:42,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45619840] [2023-03-31 01:19:42,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 01:19:42,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:42,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:19:42,595 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) [2023-03-31 01:19:42,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 01:19:42,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 01:19:42,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 01:19:42,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 41 conjunts are in the unsatisfiable core [2023-03-31 01:19:42,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:19:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 01:19:42,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:19:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 01:19:43,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45619840] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:19:43,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:19:43,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 14] total 36 [2023-03-31 01:19:43,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998292977] [2023-03-31 01:19:43,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:19:43,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-03-31 01:19:43,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:19:43,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-03-31 01:19:43,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 01:19:43,882 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 24 states have internal predecessors, (52), 8 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2023-03-31 01:19:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:19:44,413 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-03-31 01:19:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 01:19:44,413 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 24 states have internal predecessors, (52), 8 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 38 [2023-03-31 01:19:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:19:44,414 INFO L225 Difference]: With dead ends: 37 [2023-03-31 01:19:44,414 INFO L226 Difference]: Without dead ends: 33 [2023-03-31 01:19:44,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2023-03-31 01:19:44,416 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:19:44,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 107 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:19:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-31 01:19:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-03-31 01:19:44,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 01:19:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-03-31 01:19:44,421 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 38 [2023-03-31 01:19:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:19:44,422 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-03-31 01:19:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 24 states have internal predecessors, (52), 8 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2023-03-31 01:19:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-03-31 01:19:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 01:19:44,423 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:44,423 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:44,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 01:19:44,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:44,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:44,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash 436635868, now seen corresponding path program 3 times [2023-03-31 01:19:44,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:44,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43868858] [2023-03-31 01:19:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:44,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:44,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:44,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-31 01:19:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:45,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:45,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 01:19:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43868858] [2023-03-31 01:19:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43868858] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:19:45,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146175455] [2023-03-31 01:19:45,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 01:19:45,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:45,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:19:45,168 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) [2023-03-31 01:19:45,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 01:19:45,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-31 01:19:45,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 01:19:45,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjunts are in the unsatisfiable core [2023-03-31 01:19:45,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:19:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 01:19:45,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:19:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 01:19:46,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146175455] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:19:46,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:19:46,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 50 [2023-03-31 01:19:46,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954710968] [2023-03-31 01:19:46,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:19:46,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-31 01:19:46,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:19:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-31 01:19:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2249, Unknown=0, NotChecked=0, Total=2450 [2023-03-31 01:19:46,948 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 50 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 34 states have internal predecessors, (70), 10 states have call successors, (13), 2 states have call predecessors, (13), 14 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-03-31 01:19:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:19:48,312 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-03-31 01:19:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-03-31 01:19:48,313 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 34 states have internal predecessors, (70), 10 states have call successors, (13), 2 states have call predecessors, (13), 14 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 45 [2023-03-31 01:19:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:19:48,314 INFO L225 Difference]: With dead ends: 62 [2023-03-31 01:19:48,314 INFO L226 Difference]: Without dead ends: 56 [2023-03-31 01:19:48,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=581, Invalid=4821, Unknown=0, NotChecked=0, Total=5402 [2023-03-31 01:19:48,319 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 87 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:19:48,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 117 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:19:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-31 01:19:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-03-31 01:19:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2023-03-31 01:19:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2023-03-31 01:19:48,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 45 [2023-03-31 01:19:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:19:48,334 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2023-03-31 01:19:48,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 34 states have internal predecessors, (70), 10 states have call successors, (13), 2 states have call predecessors, (13), 14 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-03-31 01:19:48,334 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2023-03-31 01:19:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 01:19:48,336 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:48,336 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:48,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 01:19:48,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:48,543 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:48,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash 346523370, now seen corresponding path program 4 times [2023-03-31 01:19:48,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:48,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014208376] [2023-03-31 01:19:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:48,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:48,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:48,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:48,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:49,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-31 01:19:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:49,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 01:19:49,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:49,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014208376] [2023-03-31 01:19:49,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014208376] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:19:49,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622942084] [2023-03-31 01:19:49,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 01:19:49,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:49,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:19:49,171 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) [2023-03-31 01:19:49,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 01:19:49,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 01:19:49,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 01:19:49,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 57 conjunts are in the unsatisfiable core [2023-03-31 01:19:49,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:19:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 01:19:49,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:19:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 01:19:50,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622942084] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:19:50,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:19:50,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 49 [2023-03-31 01:19:50,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909282857] [2023-03-31 01:19:50,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:19:50,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-03-31 01:19:50,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:19:50,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-03-31 01:19:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2023-03-31 01:19:50,666 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 49 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 33 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-03-31 01:19:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:19:51,687 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2023-03-31 01:19:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 01:19:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 33 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 45 [2023-03-31 01:19:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:19:51,688 INFO L225 Difference]: With dead ends: 62 [2023-03-31 01:19:51,688 INFO L226 Difference]: Without dead ends: 56 [2023-03-31 01:19:51,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=529, Invalid=4441, Unknown=0, NotChecked=0, Total=4970 [2023-03-31 01:19:51,690 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:19:51,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 122 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:19:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-31 01:19:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2023-03-31 01:19:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (18), 10 states have call predecessors, (18), 8 states have call successors, (18) [2023-03-31 01:19:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2023-03-31 01:19:51,697 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 45 [2023-03-31 01:19:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:19:51,697 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2023-03-31 01:19:51,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 33 states have internal predecessors, (69), 10 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-03-31 01:19:51,698 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2023-03-31 01:19:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 01:19:51,698 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:51,698 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:51,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 01:19:51,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:51,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:51,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:51,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1619694410, now seen corresponding path program 5 times [2023-03-31 01:19:51,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:51,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106465330] [2023-03-31 01:19:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:51,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 01:19:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-03-31 01:19:52,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:52,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106465330] [2023-03-31 01:19:52,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106465330] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:19:52,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744899036] [2023-03-31 01:19:52,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 01:19:52,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:19:52,717 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) [2023-03-31 01:19:52,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 01:19:52,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-03-31 01:19:52,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 01:19:52,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 85 conjunts are in the unsatisfiable core [2023-03-31 01:19:52,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:19:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-03-31 01:19:53,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:19:56,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744899036] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:19:56,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 01:19:56,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 35 [2023-03-31 01:19:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058382483] [2023-03-31 01:19:56,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 01:19:56,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-03-31 01:19:56,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:19:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-03-31 01:19:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2458, Unknown=3, NotChecked=0, Total=2652 [2023-03-31 01:19:56,877 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 35 states, 32 states have (on average 1.34375) internal successors, (43), 22 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-31 01:19:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:19:57,838 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-03-31 01:19:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 01:19:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.34375) internal successors, (43), 22 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 5 states have call successors, (13) Word has length 59 [2023-03-31 01:19:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:19:57,839 INFO L225 Difference]: With dead ends: 66 [2023-03-31 01:19:57,839 INFO L226 Difference]: Without dead ends: 60 [2023-03-31 01:19:57,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=438, Invalid=4115, Unknown=3, NotChecked=0, Total=4556 [2023-03-31 01:19:57,842 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:19:57,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 122 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:19:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-03-31 01:19:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2023-03-31 01:19:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (24), 12 states have call predecessors, (24), 9 states have call successors, (24) [2023-03-31 01:19:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2023-03-31 01:19:57,850 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 59 [2023-03-31 01:19:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:19:57,850 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2023-03-31 01:19:57,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.34375) internal successors, (43), 22 states have internal predecessors, (43), 5 states have call successors, (8), 2 states have call predecessors, (8), 12 states have return successors, (13), 13 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-31 01:19:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2023-03-31 01:19:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-03-31 01:19:57,851 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:19:57,851 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:19:57,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 01:19:58,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:58,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:19:58,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:19:58,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1686458552, now seen corresponding path program 6 times [2023-03-31 01:19:58,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:19:58,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319601104] [2023-03-31 01:19:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:19:58,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:19:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:58,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:19:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:58,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:19:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:58,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:58,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:58,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 01:19:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:58,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:59,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:59,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:19:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:19:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-31 01:19:59,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:19:59,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319601104] [2023-03-31 01:19:59,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319601104] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:19:59,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770479936] [2023-03-31 01:19:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-31 01:19:59,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:19:59,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:19:59,184 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) [2023-03-31 01:19:59,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 01:19:59,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-03-31 01:19:59,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 01:19:59,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 109 conjunts are in the unsatisfiable core [2023-03-31 01:19:59,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:19:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 01:19:59,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:20:02,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770479936] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:20:02,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 01:20:02,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18] total 41 [2023-03-31 01:20:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783650620] [2023-03-31 01:20:02,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 01:20:02,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-03-31 01:20:02,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:20:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-03-31 01:20:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3552, Unknown=0, NotChecked=0, Total=3782 [2023-03-31 01:20:02,512 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2023-03-31 01:20:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:20:03,539 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2023-03-31 01:20:03,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 01:20:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) Word has length 73 [2023-03-31 01:20:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:20:03,548 INFO L225 Difference]: With dead ends: 70 [2023-03-31 01:20:03,548 INFO L226 Difference]: Without dead ends: 66 [2023-03-31 01:20:03,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=529, Invalid=5477, Unknown=0, NotChecked=0, Total=6006 [2023-03-31 01:20:03,550 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:20:03,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 132 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:20:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-03-31 01:20:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2023-03-31 01:20:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (29), 13 states have call predecessors, (29), 9 states have call successors, (29) [2023-03-31 01:20:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2023-03-31 01:20:03,565 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 73 [2023-03-31 01:20:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:20:03,566 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2023-03-31 01:20:03,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 25 states have internal predecessors, (49), 5 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2023-03-31 01:20:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2023-03-31 01:20:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-03-31 01:20:03,567 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:20:03,567 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:20:03,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 01:20:03,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:20:03,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:20:03,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:20:03,768 INFO L85 PathProgramCache]: Analyzing trace with hash 310444680, now seen corresponding path program 7 times [2023-03-31 01:20:03,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:20:03,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615798414] [2023-03-31 01:20:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:20:03,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:20:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:20:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:20:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 01:20:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:04,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-03-31 01:20:05,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:20:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615798414] [2023-03-31 01:20:05,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615798414] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:20:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600394509] [2023-03-31 01:20:05,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 01:20:05,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:20:05,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:20:05,028 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) [2023-03-31 01:20:05,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 01:20:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:05,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 121 conjunts are in the unsatisfiable core [2023-03-31 01:20:05,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:20:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-03-31 01:20:05,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:20:08,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600394509] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:20:08,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 01:20:08,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 45 [2023-03-31 01:20:08,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960211567] [2023-03-31 01:20:08,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 01:20:08,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-03-31 01:20:08,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:20:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-03-31 01:20:08,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=4304, Unknown=0, NotChecked=0, Total=4556 [2023-03-31 01:20:08,726 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2023-03-31 01:20:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:20:09,852 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2023-03-31 01:20:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-31 01:20:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) Word has length 80 [2023-03-31 01:20:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:20:09,854 INFO L225 Difference]: With dead ends: 76 [2023-03-31 01:20:09,854 INFO L226 Difference]: Without dead ends: 72 [2023-03-31 01:20:09,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=612, Invalid=6698, Unknown=0, NotChecked=0, Total=7310 [2023-03-31 01:20:09,856 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:20:09,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 137 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:20:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-03-31 01:20:09,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2023-03-31 01:20:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (34), 14 states have call predecessors, (34), 9 states have call successors, (34) [2023-03-31 01:20:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 85 transitions. [2023-03-31 01:20:09,867 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 85 transitions. Word has length 80 [2023-03-31 01:20:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:20:09,867 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 85 transitions. [2023-03-31 01:20:09,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 27 states have internal predecessors, (53), 5 states have call successors, (8), 2 states have call predecessors, (8), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2023-03-31 01:20:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 85 transitions. [2023-03-31 01:20:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 01:20:09,869 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:20:09,869 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:20:09,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 01:20:10,082 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,SelfDestructingSolverStorable9 [2023-03-31 01:20:10,083 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:20:10,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:20:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash -21388506, now seen corresponding path program 8 times [2023-03-31 01:20:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:20:10,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639419466] [2023-03-31 01:20:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:20:10,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:20:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:10,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:20:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:10,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:20:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:10,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:10,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:10,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-03-31 01:20:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:10,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:10,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:11,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:11,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:11,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:11,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-03-31 01:20:11,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:20:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639419466] [2023-03-31 01:20:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639419466] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:20:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944853848] [2023-03-31 01:20:11,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 01:20:11,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:20:11,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:20:11,437 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) [2023-03-31 01:20:11,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 01:20:11,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 01:20:11,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 01:20:11,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 133 conjunts are in the unsatisfiable core [2023-03-31 01:20:11,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:20:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-03-31 01:20:12,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:20:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 35 proven. 253 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-03-31 01:20:15,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944853848] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:20:15,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:20:15,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 22, 36] total 74 [2023-03-31 01:20:15,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221698520] [2023-03-31 01:20:15,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:20:15,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-03-31 01:20:15,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:20:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-03-31 01:20:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=5128, Unknown=0, NotChecked=0, Total=5402 [2023-03-31 01:20:15,726 INFO L87 Difference]: Start difference. First operand 59 states and 85 transitions. Second operand has 74 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 44 states have internal predecessors, (100), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2023-03-31 01:20:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:20:18,228 INFO L93 Difference]: Finished difference Result 92 states and 133 transitions. [2023-03-31 01:20:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-03-31 01:20:18,228 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 44 states have internal predecessors, (100), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) Word has length 87 [2023-03-31 01:20:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:20:18,230 INFO L225 Difference]: With dead ends: 92 [2023-03-31 01:20:18,230 INFO L226 Difference]: Without dead ends: 86 [2023-03-31 01:20:18,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=853, Invalid=9859, Unknown=0, NotChecked=0, Total=10712 [2023-03-31 01:20:18,233 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2752 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:20:18,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 237 Invalid, 2799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2752 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 01:20:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-03-31 01:20:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2023-03-31 01:20:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 11 states have call successors, (11), 6 states have call predecessors, (11), 15 states have return successors, (45), 19 states have call predecessors, (45), 10 states have call successors, (45) [2023-03-31 01:20:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 111 transitions. [2023-03-31 01:20:18,244 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 111 transitions. Word has length 87 [2023-03-31 01:20:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:20:18,244 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 111 transitions. [2023-03-31 01:20:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 44 states have internal predecessors, (100), 15 states have call successors, (18), 2 states have call predecessors, (18), 22 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2023-03-31 01:20:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 111 transitions. [2023-03-31 01:20:18,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 01:20:18,246 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:20:18,246 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:20:18,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-03-31 01:20:18,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:20:18,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:20:18,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:20:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1316864196, now seen corresponding path program 9 times [2023-03-31 01:20:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:20:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762457684] [2023-03-31 01:20:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:20:18,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:20:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:18,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:20:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:18,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:20:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:18,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:18,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-03-31 01:20:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-03-31 01:20:19,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:20:19,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762457684] [2023-03-31 01:20:19,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762457684] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:20:19,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755165148] [2023-03-31 01:20:19,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 01:20:19,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:20:19,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:20:19,730 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) [2023-03-31 01:20:19,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 01:20:19,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-03-31 01:20:19,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 01:20:19,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 133 conjunts are in the unsatisfiable core [2023-03-31 01:20:19,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:20:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 5 proven. 163 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-03-31 01:20:20,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:20:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755165148] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:20:23,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 01:20:23,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 20] total 47 [2023-03-31 01:20:23,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459714264] [2023-03-31 01:20:23,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 01:20:23,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-03-31 01:20:23,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:20:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-03-31 01:20:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=4570, Unknown=0, NotChecked=0, Total=4830 [2023-03-31 01:20:23,629 INFO L87 Difference]: Start difference. First operand 78 states and 111 transitions. Second operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 28 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) [2023-03-31 01:20:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:20:24,998 INFO L93 Difference]: Finished difference Result 90 states and 126 transitions. [2023-03-31 01:20:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-03-31 01:20:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.25) internal successors, (55), 28 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) Word has length 87 [2023-03-31 01:20:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:20:24,999 INFO L225 Difference]: With dead ends: 90 [2023-03-31 01:20:24,999 INFO L226 Difference]: Without dead ends: 84 [2023-03-31 01:20:25,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=640, Invalid=7370, Unknown=0, NotChecked=0, Total=8010 [2023-03-31 01:20:25,002 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 01:20:25,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 172 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 01:20:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-03-31 01:20:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2023-03-31 01:20:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 12 states have call successors, (12), 6 states have call predecessors, (12), 15 states have return successors, (46), 20 states have call predecessors, (46), 11 states have call successors, (46) [2023-03-31 01:20:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 114 transitions. [2023-03-31 01:20:25,021 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 114 transitions. Word has length 87 [2023-03-31 01:20:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:20:25,022 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 114 transitions. [2023-03-31 01:20:25,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.25) internal successors, (55), 28 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) [2023-03-31 01:20:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 114 transitions. [2023-03-31 01:20:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-03-31 01:20:25,023 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:20:25,023 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:20:25,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 01:20:25,229 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,SelfDestructingSolverStorable11 [2023-03-31 01:20:25,229 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:20:25,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:20:25,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1548198130, now seen corresponding path program 10 times [2023-03-31 01:20:25,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:20:25,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545055547] [2023-03-31 01:20:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:20:25,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:20:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:25,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:20:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:25,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-31 01:20:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:25,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:25,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:25,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-31 01:20:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:25,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:25,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:25,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:26,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:26,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-03-31 01:20:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:20:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-31 01:20:26,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:20:26,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545055547] [2023-03-31 01:20:26,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545055547] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 01:20:26,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754115270] [2023-03-31 01:20:26,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 01:20:26,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 01:20:26,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:20:26,185 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) [2023-03-31 01:20:26,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 01:20:26,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 01:20:26,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 01:20:26,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 109 conjunts are in the unsatisfiable core [2023-03-31 01:20:26,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 01:20:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-03-31 01:20:26,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 01:20:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 01:20:29,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754115270] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 01:20:29,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 01:20:29,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 30] total 63 [2023-03-31 01:20:29,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263493219] [2023-03-31 01:20:29,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 01:20:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-03-31 01:20:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:20:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-03-31 01:20:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3678, Unknown=0, NotChecked=0, Total=3906 [2023-03-31 01:20:29,091 INFO L87 Difference]: Start difference. First operand 80 states and 114 transitions. Second operand has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 38 states have internal predecessors, (85), 13 states have call successors, (16), 2 states have call predecessors, (16), 18 states have return successors, (26), 25 states have call predecessors, (26), 13 states have call successors, (26)