/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:36:21,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:36:21,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:36:21,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:36:21,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:36:21,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:36:21,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:36:21,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:36:21,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:36:21,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:36:21,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:36:21,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:36:21,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:36:21,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:36:21,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:36:21,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:36:21,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 06:36:21,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:36:21,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:36:21,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:36:21,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:36:21,854 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:36:21,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:36:21,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:36:21,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:36:21,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:36:21,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:36:21,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:36:21,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:36:21,856 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:36:21,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:36:21,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:36:21,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:36:21,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:36:21,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:36:21,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:36:21,857 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:36:21,857 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:36:21,857 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:36:21,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:36:21,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:36:21,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:36:21,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:36:21,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:36:21,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:21,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:36:21,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:36:21,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:36:21,858 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:36:21,859 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:36:21,859 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:36:21,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:36:21,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:36:21,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:36:21,859 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:36:22,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:36:22,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:36:22,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:36:22,085 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:36:22,085 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:36:22,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2022-01-10 06:36:22,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef0e3778f/2daf162939e942b294c441010bc3b76b/FLAGf63314ae1 [2022-01-10 06:36:22,519 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:36:22,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2022-01-10 06:36:22,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef0e3778f/2daf162939e942b294c441010bc3b76b/FLAGf63314ae1 [2022-01-10 06:36:22,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef0e3778f/2daf162939e942b294c441010bc3b76b [2022-01-10 06:36:22,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:36:22,546 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:36:22,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:22,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:36:22,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:36:22,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435aca45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22, skipping insertion in model container [2022-01-10 06:36:22,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:36:22,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:36:22,741 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c[975,988] [2022-01-10 06:36:22,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:22,754 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:36:22,768 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c[975,988] [2022-01-10 06:36:22,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:22,780 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:36:22,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22 WrapperNode [2022-01-10 06:36:22,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:22,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:22,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:36:22,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:36:22,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,805 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2022-01-10 06:36:22,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:22,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:36:22,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:36:22,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:36:22,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:36:22,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:36:22,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:36:22,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:36:22,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (1/1) ... [2022-01-10 06:36:22,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:36:22,865 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) [2022-01-10 06:36:22,872 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 [2022-01-10 06:36:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:36:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2022-01-10 06:36:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2022-01-10 06:36:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:36:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2022-01-10 06:36:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2022-01-10 06:36:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:36:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:36:22,954 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:36:22,956 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:36:23,071 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:36:23,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:36:23,074 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:36:23,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:23 BoogieIcfgContainer [2022-01-10 06:36:23,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:36:23,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:36:23,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:36:23,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:36:23,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:36:22" (1/3) ... [2022-01-10 06:36:23,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccdebe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:23, skipping insertion in model container [2022-01-10 06:36:23,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:22" (2/3) ... [2022-01-10 06:36:23,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccdebe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:23, skipping insertion in model container [2022-01-10 06:36:23,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:23" (3/3) ... [2022-01-10 06:36:23,091 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2022-01-10 06:36:23,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:36:23,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:36:23,128 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:36:23,133 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:36:23,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:36:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:36:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:36:23,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:23,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:23,147 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:23,150 INFO L85 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2022-01-10 06:36:23,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:23,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354233920] [2022-01-10 06:36:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:23,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:23,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:23,164 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:23,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:36:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:23,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:36:23,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:36:23,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:23,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:23,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354233920] [2022-01-10 06:36:23,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354233920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:23,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:23,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:36:23,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064226487] [2022-01-10 06:36:23,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:23,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:36:23,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:36:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:36:23,392 INFO L87 Difference]: Start difference. First operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:23,498 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-01-10 06:36:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:36:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 06:36:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:23,506 INFO L225 Difference]: With dead ends: 40 [2022-01-10 06:36:23,509 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 06:36:23,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:36:23,516 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:23,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 121 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 06:36:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 06:36:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 06:36:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-10 06:36:23,549 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2022-01-10 06:36:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:23,550 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-10 06:36:23,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-10 06:36:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 06:36:23,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:23,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:23,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:23,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:23,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:23,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:23,753 INFO L85 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2022-01-10 06:36:23,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:23,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870006740] [2022-01-10 06:36:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:23,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:23,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:23,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:36:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:36:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:36:23,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:23,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870006740] [2022-01-10 06:36:23,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870006740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:23,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:23,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:36:23,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534901997] [2022-01-10 06:36:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:23,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:36:23,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:36:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:36:23,881 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:23,959 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-10 06:36:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:36:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-10 06:36:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:23,961 INFO L225 Difference]: With dead ends: 30 [2022-01-10 06:36:23,961 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 06:36:23,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:36:23,962 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:23,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 06:36:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-10 06:36:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 06:36:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-10 06:36:23,967 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2022-01-10 06:36:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:23,967 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-10 06:36:23,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-10 06:36:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 06:36:23,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:23,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:23,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:24,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:24,176 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2022-01-10 06:36:24,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:24,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271384117] [2022-01-10 06:36:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:24,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:24,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:24,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:24,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:36:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:24,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:36:24,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:36:24,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:24,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271384117] [2022-01-10 06:36:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271384117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:24,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:24,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:36:24,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324921290] [2022-01-10 06:36:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:24,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:36:24,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:36:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:36:24,318 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:36:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:24,373 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-01-10 06:36:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:36:24,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-01-10 06:36:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:24,375 INFO L225 Difference]: With dead ends: 38 [2022-01-10 06:36:24,375 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 06:36:24,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:36:24,378 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:24,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 65 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 06:36:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-10 06:36:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 06:36:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-10 06:36:24,389 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2022-01-10 06:36:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:24,389 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-10 06:36:24,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:36:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-10 06:36:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 06:36:24,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:24,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:24,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:24,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:24,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:24,592 INFO L85 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2022-01-10 06:36:24,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254291635] [2022-01-10 06:36:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:24,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:24,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:24,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:36:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:24,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:36:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:36:24,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:24,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:24,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254291635] [2022-01-10 06:36:24,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254291635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:24,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:24,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 06:36:24,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308530924] [2022-01-10 06:36:24,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:24,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:36:24,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:36:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:36:24,747 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:36:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:24,863 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-01-10 06:36:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:36:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-01-10 06:36:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:24,864 INFO L225 Difference]: With dead ends: 33 [2022-01-10 06:36:24,864 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 06:36:24,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:36:24,865 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:24,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 89 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 06:36:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-01-10 06:36:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:36:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-10 06:36:24,869 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2022-01-10 06:36:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:24,869 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-10 06:36:24,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:36:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-10 06:36:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:36:24,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:24,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:24,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:25,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:25,078 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:25,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2022-01-10 06:36:25,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:25,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293238287] [2022-01-10 06:36:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:25,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:25,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:25,084 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:25,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:36:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:25,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:36:25,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:36:25,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:25,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293238287] [2022-01-10 06:36:25,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293238287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:25,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:25,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:36:25,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438817821] [2022-01-10 06:36:25,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:25,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:36:25,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:36:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:36:25,162 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:36:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:25,193 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-01-10 06:36:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:36:25,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-01-10 06:36:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:25,195 INFO L225 Difference]: With dead ends: 39 [2022-01-10 06:36:25,195 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:36:25,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:36:25,196 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:25,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 66 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:36:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 06:36:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:36:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-10 06:36:25,201 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2022-01-10 06:36:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:25,202 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-10 06:36:25,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:36:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-10 06:36:25,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 06:36:25,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:25,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:25,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:36:25,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:25,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:25,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2022-01-10 06:36:25,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:25,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462742676] [2022-01-10 06:36:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:25,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:25,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:25,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:25,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:36:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:36:25,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:36:25,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:36:26,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:26,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462742676] [2022-01-10 06:36:26,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462742676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:26,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:26,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-01-10 06:36:26,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837059271] [2022-01-10 06:36:26,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:26,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:36:26,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:36:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:36:26,107 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 06:36:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:26,303 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-01-10 06:36:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:36:26,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 26 [2022-01-10 06:36:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:26,304 INFO L225 Difference]: With dead ends: 39 [2022-01-10 06:36:26,304 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 06:36:26,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:36:26,305 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:26,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 164 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 06:36:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-01-10 06:36:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:36:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-10 06:36:26,309 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2022-01-10 06:36:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:26,309 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-10 06:36:26,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 06:36:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-10 06:36:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 06:36:26,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:26,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:26,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:26,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:26,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2022-01-10 06:36:26,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:26,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543232343] [2022-01-10 06:36:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:26,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:26,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:26,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:26,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:36:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:26,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 06:36:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:36:26,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:36:27,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543232343] [2022-01-10 06:36:27,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543232343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:27,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:27,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2022-01-10 06:36:27,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787447519] [2022-01-10 06:36:27,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:27,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 06:36:27,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 06:36:27,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:36:27,336 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:36:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:27,608 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-01-10 06:36:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:36:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2022-01-10 06:36:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:27,609 INFO L225 Difference]: With dead ends: 45 [2022-01-10 06:36:27,609 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 06:36:27,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:36:27,610 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:27,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 199 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 06:36:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-01-10 06:36:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 06:36:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-01-10 06:36:27,613 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2022-01-10 06:36:27,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:27,614 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-01-10 06:36:27,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:36:27,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-01-10 06:36:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 06:36:27,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:27,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:27,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:27,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:27,821 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2022-01-10 06:36:27,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:27,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844323505] [2022-01-10 06:36:27,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:27,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:27,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:27,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:27,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:36:27,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:27,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:27,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 06:36:27,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 06:36:28,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:36:29,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:29,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844323505] [2022-01-10 06:36:29,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844323505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:29,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:29,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2022-01-10 06:36:29,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290693437] [2022-01-10 06:36:29,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:29,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 06:36:29,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:29,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 06:36:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-01-10 06:36:29,349 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 22 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-10 06:36:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:29,777 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-01-10 06:36:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:36:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 22 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 40 [2022-01-10 06:36:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:29,779 INFO L225 Difference]: With dead ends: 51 [2022-01-10 06:36:29,779 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 06:36:29,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:36:29,781 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:29,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 350 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 323 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-01-10 06:36:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 06:36:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-01-10 06:36:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:36:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-10 06:36:29,786 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2022-01-10 06:36:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:29,786 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-10 06:36:29,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 22 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-10 06:36:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-10 06:36:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 06:36:29,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:29,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:29,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:29,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:29,999 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2022-01-10 06:36:30,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:30,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224554139] [2022-01-10 06:36:30,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:30,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:30,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:30,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:30,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:36:30,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 06:36:30,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:36:30,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:36:31,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224554139] [2022-01-10 06:36:31,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224554139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:31,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:31,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2022-01-10 06:36:31,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213724899] [2022-01-10 06:36:31,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:31,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 06:36:31,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 06:36:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 06:36:31,936 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 25 states have internal predecessors, (56), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 06:36:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:32,365 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-01-10 06:36:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 06:36:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 25 states have internal predecessors, (56), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 47 [2022-01-10 06:36:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:32,366 INFO L225 Difference]: With dead ends: 57 [2022-01-10 06:36:32,366 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 06:36:32,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:36:32,367 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:32,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 309 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 287 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-10 06:36:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 06:36:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-01-10 06:36:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:36:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-01-10 06:36:32,371 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2022-01-10 06:36:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:32,371 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-01-10 06:36:32,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 25 states have internal predecessors, (56), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 06:36:32,371 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-01-10 06:36:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 06:36:32,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:32,372 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:32,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:32,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:32,579 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2022-01-10 06:36:32,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:32,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291447523] [2022-01-10 06:36:32,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:36:32,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:32,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:32,582 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:32,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:36:32,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:36:32,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:32,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-10 06:36:32,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:36:33,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:36:35,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291447523] [2022-01-10 06:36:35,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291447523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:35,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:35,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 42 [2022-01-10 06:36:35,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976894938] [2022-01-10 06:36:35,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:35,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-10 06:36:35,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-10 06:36:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 06:36:35,016 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 42 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 28 states have internal predecessors, (63), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (14), 14 states have call predecessors, (14), 10 states have call successors, (14) [2022-01-10 06:36:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:35,491 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2022-01-10 06:36:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 06:36:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 28 states have internal predecessors, (63), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (14), 14 states have call predecessors, (14), 10 states have call successors, (14) Word has length 54 [2022-01-10 06:36:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:35,492 INFO L225 Difference]: With dead ends: 63 [2022-01-10 06:36:35,492 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 06:36:35,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=253, Invalid=2827, Unknown=0, NotChecked=0, Total=3080 [2022-01-10 06:36:35,493 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:35,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 452 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 337 Invalid, 0 Unknown, 278 Unchecked, 0.2s Time] [2022-01-10 06:36:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 06:36:35,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2022-01-10 06:36:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:36:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-01-10 06:36:35,497 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2022-01-10 06:36:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:35,497 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-01-10 06:36:35,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 28 states have internal predecessors, (63), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (14), 14 states have call predecessors, (14), 10 states have call successors, (14) [2022-01-10 06:36:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-01-10 06:36:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 06:36:35,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:35,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:35,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:35,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:35,705 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2022-01-10 06:36:35,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:35,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637663394] [2022-01-10 06:36:35,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:36:35,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:35,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:35,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:35,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:36:35,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:36:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:35,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 06:36:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 06:36:36,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:36:38,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:38,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637663394] [2022-01-10 06:36:38,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637663394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:38,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:38,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2022-01-10 06:36:38,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321832681] [2022-01-10 06:36:38,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:38,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-10 06:36:38,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:38,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-10 06:36:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2012, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 06:36:38,555 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 31 states have internal predecessors, (70), 11 states have call successors, (11), 1 states have call predecessors, (11), 16 states have return successors, (16), 16 states have call predecessors, (16), 11 states have call successors, (16) [2022-01-10 06:36:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:39,217 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-01-10 06:36:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:36:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 31 states have internal predecessors, (70), 11 states have call successors, (11), 1 states have call predecessors, (11), 16 states have return successors, (16), 16 states have call predecessors, (16), 11 states have call successors, (16) Word has length 61 [2022-01-10 06:36:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:39,218 INFO L225 Difference]: With dead ends: 69 [2022-01-10 06:36:39,218 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 06:36:39,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=3724, Unknown=0, NotChecked=0, Total=4032 [2022-01-10 06:36:39,220 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:39,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 475 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 522 Invalid, 0 Unknown, 300 Unchecked, 0.3s Time] [2022-01-10 06:36:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 06:36:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2022-01-10 06:36:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:36:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-01-10 06:36:39,225 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2022-01-10 06:36:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:39,226 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-01-10 06:36:39,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 31 states have internal predecessors, (70), 11 states have call successors, (11), 1 states have call predecessors, (11), 16 states have return successors, (16), 16 states have call predecessors, (16), 11 states have call successors, (16) [2022-01-10 06:36:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-01-10 06:36:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 06:36:39,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:39,227 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:39,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:39,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:39,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2022-01-10 06:36:39,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:39,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9751157] [2022-01-10 06:36:39,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:36:39,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:39,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:39,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:39,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:36:39,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:36:39,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-10 06:36:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-10 06:36:39,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:36:41,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:41,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9751157] [2022-01-10 06:36:41,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9751157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:41,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:41,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30] total 37 [2022-01-10 06:36:41,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243746018] [2022-01-10 06:36:41,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:41,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 06:36:41,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:41,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 06:36:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 06:36:41,863 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 37 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 26 states have internal predecessors, (62), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2022-01-10 06:36:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:42,445 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-01-10 06:36:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:36:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 26 states have internal predecessors, (62), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 68 [2022-01-10 06:36:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:42,452 INFO L225 Difference]: With dead ends: 75 [2022-01-10 06:36:42,452 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 06:36:42,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 06:36:42,453 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:42,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 380 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:36:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 06:36:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2022-01-10 06:36:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 06:36:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-10 06:36:42,471 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2022-01-10 06:36:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:42,474 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-10 06:36:42,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 26 states have internal predecessors, (62), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2022-01-10 06:36:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-10 06:36:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:36:42,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:42,475 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:42,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:42,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:42,683 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2022-01-10 06:36:42,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:42,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351486347] [2022-01-10 06:36:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:36:42,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:42,685 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:42,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:36:42,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:36:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-10 06:36:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-10 06:36:43,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:36:45,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:45,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351486347] [2022-01-10 06:36:45,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351486347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:45,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:45,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33] total 40 [2022-01-10 06:36:45,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778216389] [2022-01-10 06:36:45,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:45,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-10 06:36:45,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:45,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-10 06:36:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 06:36:45,505 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2022-01-10 06:36:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:46,239 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-01-10 06:36:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:36:46,239 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) Word has length 75 [2022-01-10 06:36:46,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:46,240 INFO L225 Difference]: With dead ends: 81 [2022-01-10 06:36:46,240 INFO L226 Difference]: Without dead ends: 77 [2022-01-10 06:36:46,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=3333, Unknown=0, NotChecked=0, Total=3660 [2022-01-10 06:36:46,241 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:46,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 419 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:36:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-10 06:36:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2022-01-10 06:36:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 06:36:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-01-10 06:36:46,245 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2022-01-10 06:36:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:46,246 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-01-10 06:36:46,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (20), 12 states have call predecessors, (20), 13 states have call successors, (20) [2022-01-10 06:36:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-01-10 06:36:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:36:46,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:46,249 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:46,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:46,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:46,457 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2022-01-10 06:36:46,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:46,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200298370] [2022-01-10 06:36:46,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:36:46,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:46,459 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:46,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:36:46,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 06:36:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-10 06:36:46,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-10 06:36:47,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:36:51,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:51,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200298370] [2022-01-10 06:36:51,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200298370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:51,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:51,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 36] total 62 [2022-01-10 06:36:51,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647937810] [2022-01-10 06:36:51,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:51,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-10 06:36:51,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:51,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-10 06:36:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=3578, Unknown=0, NotChecked=0, Total=3782 [2022-01-10 06:36:51,107 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 40 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 22 states have return successors, (22), 22 states have call predecessors, (22), 14 states have call successors, (22) [2022-01-10 06:36:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:52,046 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2022-01-10 06:36:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 06:36:52,046 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 40 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 22 states have return successors, (22), 22 states have call predecessors, (22), 14 states have call successors, (22) Word has length 82 [2022-01-10 06:36:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:52,047 INFO L225 Difference]: With dead ends: 87 [2022-01-10 06:36:52,047 INFO L226 Difference]: Without dead ends: 83 [2022-01-10 06:36:52,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=439, Invalid=6533, Unknown=0, NotChecked=0, Total=6972 [2022-01-10 06:36:52,049 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:52,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 738 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 648 Invalid, 0 Unknown, 478 Unchecked, 0.3s Time] [2022-01-10 06:36:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-10 06:36:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2022-01-10 06:36:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:36:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-01-10 06:36:52,053 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2022-01-10 06:36:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:52,053 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-01-10 06:36:52,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 40 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 22 states have return successors, (22), 22 states have call predecessors, (22), 14 states have call successors, (22) [2022-01-10 06:36:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-01-10 06:36:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:36:52,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:52,054 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:52,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 06:36:52,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:52,262 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2022-01-10 06:36:52,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:52,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932140084] [2022-01-10 06:36:52,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:36:52,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:52,264 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:52,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:36:52,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 06:36:52,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-10 06:36:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-01-10 06:36:52,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:36:56,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:56,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932140084] [2022-01-10 06:36:56,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932140084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:56,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:56,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 39] total 46 [2022-01-10 06:36:56,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908552473] [2022-01-10 06:36:56,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:56,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-10 06:36:56,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:56,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-10 06:36:56,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 06:36:56,134 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 46 states, 45 states have (on average 1.711111111111111) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (24), 14 states have call predecessors, (24), 15 states have call successors, (24) [2022-01-10 06:36:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:57,107 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-01-10 06:36:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 06:36:57,108 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.711111111111111) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (24), 14 states have call predecessors, (24), 15 states have call successors, (24) Word has length 89 [2022-01-10 06:36:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:57,108 INFO L225 Difference]: With dead ends: 93 [2022-01-10 06:36:57,108 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 06:36:57,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 124 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=412, Invalid=4558, Unknown=0, NotChecked=0, Total=4970 [2022-01-10 06:36:57,110 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:57,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 626 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:36:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 06:36:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2022-01-10 06:36:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:36:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-01-10 06:36:57,118 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2022-01-10 06:36:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:57,118 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-01-10 06:36:57,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.711111111111111) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (24), 14 states have call predecessors, (24), 15 states have call successors, (24) [2022-01-10 06:36:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-01-10 06:36:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 06:36:57,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:57,119 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:57,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:57,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:57,320 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:57,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2022-01-10 06:36:57,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:57,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164412950] [2022-01-10 06:36:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:36:57,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:57,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:57,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:57,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:36:57,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-10 06:36:57,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:57,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-10 06:36:57,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-10 06:36:58,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 06:37:03,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:03,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164412950] [2022-01-10 06:37:03,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164412950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:03,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:03,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 42] total 72 [2022-01-10 06:37:03,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251786374] [2022-01-10 06:37:03,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:03,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-10 06:37:03,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-10 06:37:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4872, Unknown=0, NotChecked=0, Total=5112 [2022-01-10 06:37:03,286 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 46 states have internal predecessors, (105), 16 states have call successors, (16), 1 states have call predecessors, (16), 26 states have return successors, (26), 26 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-10 06:37:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:04,803 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2022-01-10 06:37:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 06:37:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 46 states have internal predecessors, (105), 16 states have call successors, (16), 1 states have call predecessors, (16), 26 states have return successors, (26), 26 states have call predecessors, (26), 16 states have call successors, (26) Word has length 96 [2022-01-10 06:37:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:04,804 INFO L225 Difference]: With dead ends: 99 [2022-01-10 06:37:04,804 INFO L226 Difference]: Without dead ends: 95 [2022-01-10 06:37:04,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=531, Invalid=9171, Unknown=0, NotChecked=0, Total=9702 [2022-01-10 06:37:04,807 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:04,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 974 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 814 Invalid, 0 Unknown, 755 Unchecked, 0.4s Time] [2022-01-10 06:37:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-10 06:37:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2022-01-10 06:37:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-10 06:37:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-10 06:37:04,812 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2022-01-10 06:37:04,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:04,812 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-10 06:37:04,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 46 states have internal predecessors, (105), 16 states have call successors, (16), 1 states have call predecessors, (16), 26 states have return successors, (26), 26 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-10 06:37:04,812 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-10 06:37:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 06:37:04,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:04,813 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:04,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 06:37:05,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:05,020 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2022-01-10 06:37:05,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:05,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608100207] [2022-01-10 06:37:05,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:37:05,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:05,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:05,022 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:05,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:37:05,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-10 06:37:05,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-10 06:37:05,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-10 06:37:05,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 06:37:11,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:11,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608100207] [2022-01-10 06:37:11,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608100207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:11,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:11,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 45] total 77 [2022-01-10 06:37:11,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114310671] [2022-01-10 06:37:11,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:11,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-10 06:37:11,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-10 06:37:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5594, Unknown=0, NotChecked=0, Total=5852 [2022-01-10 06:37:11,730 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 77 states, 76 states have (on average 1.4736842105263157) internal successors, (112), 49 states have internal predecessors, (112), 17 states have call successors, (17), 1 states have call predecessors, (17), 28 states have return successors, (28), 28 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-10 06:37:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:13,157 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2022-01-10 06:37:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-10 06:37:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.4736842105263157) internal successors, (112), 49 states have internal predecessors, (112), 17 states have call successors, (17), 1 states have call predecessors, (17), 28 states have return successors, (28), 28 states have call predecessors, (28), 17 states have call successors, (28) Word has length 103 [2022-01-10 06:37:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:13,160 INFO L225 Difference]: With dead ends: 105 [2022-01-10 06:37:13,160 INFO L226 Difference]: Without dead ends: 101 [2022-01-10 06:37:13,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=595, Invalid=10325, Unknown=0, NotChecked=0, Total=10920 [2022-01-10 06:37:13,161 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:13,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 920 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 866 Invalid, 0 Unknown, 674 Unchecked, 0.4s Time] [2022-01-10 06:37:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-10 06:37:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2022-01-10 06:37:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 06:37:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-01-10 06:37:13,166 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2022-01-10 06:37:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:13,166 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-01-10 06:37:13,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.4736842105263157) internal successors, (112), 49 states have internal predecessors, (112), 17 states have call successors, (17), 1 states have call predecessors, (17), 28 states have return successors, (28), 28 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-10 06:37:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-01-10 06:37:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 06:37:13,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:13,167 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:13,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:13,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:13,374 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2022-01-10 06:37:13,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:13,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455446718] [2022-01-10 06:37:13,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:37:13,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:13,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:13,377 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:13,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:37:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-10 06:37:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-01-10 06:37:14,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-10 06:37:18,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:18,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455446718] [2022-01-10 06:37:18,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455446718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:18,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:18,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 48] total 55 [2022-01-10 06:37:18,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145257790] [2022-01-10 06:37:18,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:18,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-10 06:37:18,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-10 06:37:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2788, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 06:37:18,893 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 55 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (30), 17 states have call predecessors, (30), 18 states have call successors, (30) [2022-01-10 06:37:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:20,285 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2022-01-10 06:37:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-10 06:37:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (30), 17 states have call predecessors, (30), 18 states have call successors, (30) Word has length 110 [2022-01-10 06:37:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:20,286 INFO L225 Difference]: With dead ends: 111 [2022-01-10 06:37:20,286 INFO L226 Difference]: Without dead ends: 107 [2022-01-10 06:37:20,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 155 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=536, Invalid=6604, Unknown=0, NotChecked=0, Total=7140 [2022-01-10 06:37:20,288 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:20,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 910 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:37:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-10 06:37:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2022-01-10 06:37:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-10 06:37:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-01-10 06:37:20,291 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2022-01-10 06:37:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:20,291 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-01-10 06:37:20,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (30), 17 states have call predecessors, (30), 18 states have call successors, (30) [2022-01-10 06:37:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-01-10 06:37:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-10 06:37:20,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:20,292 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:20,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 06:37:20,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:20,498 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2022-01-10 06:37:20,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:20,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675248514] [2022-01-10 06:37:20,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:37:20,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:20,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:20,500 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:20,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:37:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-10 06:37:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-10 06:37:21,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 06:37:26,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:26,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675248514] [2022-01-10 06:37:26,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675248514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:26,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:26,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 51] total 58 [2022-01-10 06:37:26,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622795166] [2022-01-10 06:37:26,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:26,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-10 06:37:26,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-10 06:37:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3113, Unknown=0, NotChecked=0, Total=3306 [2022-01-10 06:37:26,548 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 58 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-01-10 06:37:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:28,077 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2022-01-10 06:37:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-10 06:37:28,078 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) Word has length 117 [2022-01-10 06:37:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:28,079 INFO L225 Difference]: With dead ends: 117 [2022-01-10 06:37:28,079 INFO L226 Difference]: Without dead ends: 113 [2022-01-10 06:37:28,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 164 SyntacticMatches, 12 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=606, Invalid=7584, Unknown=0, NotChecked=0, Total=8190 [2022-01-10 06:37:28,080 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:28,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 846 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:37:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-10 06:37:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2022-01-10 06:37:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2022-01-10 06:37:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-01-10 06:37:28,083 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2022-01-10 06:37:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:28,083 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-01-10 06:37:28,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-01-10 06:37:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-01-10 06:37:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 06:37:28,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:28,084 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:28,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:28,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:28,291 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2022-01-10 06:37:28,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:28,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536986656] [2022-01-10 06:37:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:28,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:28,293 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:28,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:37:28,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:28,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 74 conjunts are in the unsatisfiable core [2022-01-10 06:37:28,434 INFO L286 TraceCheckSpWp]: Computing forward predicates...