/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:37:20,321 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:37:20,392 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 12:37:20,398 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:37:20,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:37:20,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:37:20,433 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:37:20,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:37:20,434 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:37:20,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:37:20,438 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:37:20,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:37:20,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:37:20,440 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:37:20,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:37:20,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:37:20,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:37:20,440 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:37:20,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:37:20,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:37:20,441 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:37:20,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:37:20,442 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:37:20,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:37:20,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:37:20,443 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:37:20,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:37:20,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:37:20,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:37:20,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:37:20,445 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:37:20,445 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:37:20,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:37:20,445 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:37:20,446 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:37:20,446 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:37:20,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:37:20,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:37:20,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:37:20,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:37:20,783 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:37:20,784 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-08-24 12:37:21,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:37:22,159 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:37:22,159 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-08-24 12:37:22,174 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d9e87a4e/f96fe82315494be48621f199f9814ce8/FLAG398e7e359 [2023-08-24 12:37:22,186 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d9e87a4e/f96fe82315494be48621f199f9814ce8 [2023-08-24 12:37:22,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:37:22,189 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:37:22,191 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:37:22,191 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:37:22,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:37:22,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cab601f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22, skipping insertion in model container [2023-08-24 12:37:22,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,233 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:37:22,565 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i[30176,30189] [2023-08-24 12:37:22,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:37:22,612 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:37:22,638 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:37:22,640 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:37:22,648 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i[30176,30189] [2023-08-24 12:37:22,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:37:22,721 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:37:22,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22 WrapperNode [2023-08-24 12:37:22,722 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:37:22,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:37:22,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:37:22,724 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:37:22,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,761 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,797 INFO L138 Inliner]: procedures = 172, calls = 52, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 224 [2023-08-24 12:37:22,798 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:37:22,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:37:22,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:37:22,799 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:37:22,806 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,827 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,840 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:37:22,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:37:22,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:37:22,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:37:22,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (1/1) ... [2023-08-24 12:37:22,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:37:22,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:22,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 12:37:22,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 12:37:22,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:37:22,911 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-24 12:37:22,911 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-24 12:37:22,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:37:22,911 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:37:22,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:37:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:37:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-24 12:37:22,912 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-24 12:37:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:37:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:37:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:37:22,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:37:22,914 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 12:37:23,032 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:37:23,034 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:37:23,325 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:37:23,333 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:37:23,333 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-24 12:37:23,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:37:23 BoogieIcfgContainer [2023-08-24 12:37:23,336 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:37:23,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:37:23,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:37:23,341 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:37:23,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:37:22" (1/3) ... [2023-08-24 12:37:23,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f79a46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:37:23, skipping insertion in model container [2023-08-24 12:37:23,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:37:22" (2/3) ... [2023-08-24 12:37:23,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f79a46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:37:23, skipping insertion in model container [2023-08-24 12:37:23,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:37:23" (3/3) ... [2023-08-24 12:37:23,343 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_10-ptrmunge_racefree.i [2023-08-24 12:37:23,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:37:23,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 12:37:23,357 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:37:23,462 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:37:23,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:23,607 INFO L124 PetriNetUnfolderBase]: 58/396 cut-off events. [2023-08-24 12:37:23,607 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-24 12:37:23,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 396 events. 58/396 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1684 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-24 12:37:23,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:23,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:23,632 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:23,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:23,652 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:23,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:23,707 INFO L124 PetriNetUnfolderBase]: 58/396 cut-off events. [2023-08-24 12:37:23,708 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-24 12:37:23,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 396 events. 58/396 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1684 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-24 12:37:23,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 19642 [2023-08-24 12:37:28,186 INFO L134 LiptonReduction]: Checked pairs total: 31521 [2023-08-24 12:37:28,186 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-24 12:37:28,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:28,204 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21be6f7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:28,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 12:37:28,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:28,210 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2023-08-24 12:37:28,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:28,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:28,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:28,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:37:28,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:28,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2028877864, now seen corresponding path program 1 times [2023-08-24 12:37:28,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:28,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46800910] [2023-08-24 12:37:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:28,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:28,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46800910] [2023-08-24 12:37:28,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46800910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:28,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:28,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 12:37:28,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310186526] [2023-08-24 12:37:28,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:28,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 12:37:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 12:37:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 12:37:28,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 389 [2023-08-24 12:37:28,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 79 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:28,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:28,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 389 [2023-08-24 12:37:28,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:29,745 INFO L124 PetriNetUnfolderBase]: 4680/7780 cut-off events. [2023-08-24 12:37:29,745 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-08-24 12:37:29,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15236 conditions, 7780 events. 4680/7780 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 50196 event pairs, 3182 based on Foata normal form. 1075/7189 useless extension candidates. Maximal degree in co-relation 13932. Up to 5907 conditions per place. [2023-08-24 12:37:29,774 INFO L140 encePairwiseOnDemand]: 359/389 looper letters, 76 selfloop transitions, 8 changer transitions 43/138 dead transitions. [2023-08-24 12:37:29,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 138 transitions, 573 flow [2023-08-24 12:37:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:37:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:37:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1201 transitions. [2023-08-24 12:37:29,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44105765699596033 [2023-08-24 12:37:29,796 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1201 transitions. [2023-08-24 12:37:29,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1201 transitions. [2023-08-24 12:37:29,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:29,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1201 transitions. [2023-08-24 12:37:29,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 171.57142857142858) internal successors, (1201), 7 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 389.0) internal successors, (3112), 8 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,818 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 389.0) internal successors, (3112), 8 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,819 INFO L175 Difference]: Start difference. First operand has 58 places, 79 transitions, 180 flow. Second operand 7 states and 1201 transitions. [2023-08-24 12:37:29,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 138 transitions, 573 flow [2023-08-24 12:37:29,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 138 transitions, 573 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:29,835 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 216 flow [2023-08-24 12:37:29,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2023-08-24 12:37:29,839 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2023-08-24 12:37:29,840 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 216 flow [2023-08-24 12:37:29,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:29,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:29,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:37:29,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:37:29,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1114439494, now seen corresponding path program 1 times [2023-08-24 12:37:29,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:29,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822896065] [2023-08-24 12:37:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:29,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:29,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822896065] [2023-08-24 12:37:29,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822896065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:29,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:29,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:29,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339653484] [2023-08-24 12:37:29,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:29,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:29,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:29,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 389 [2023-08-24 12:37:29,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:29,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:29,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 389 [2023-08-24 12:37:29,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:30,557 INFO L124 PetriNetUnfolderBase]: 4058/7126 cut-off events. [2023-08-24 12:37:30,557 INFO L125 PetriNetUnfolderBase]: For 3188/3188 co-relation queries the response was YES. [2023-08-24 12:37:30,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15960 conditions, 7126 events. 4058/7126 cut-off events. For 3188/3188 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 49255 event pairs, 3302 based on Foata normal form. 1/6294 useless extension candidates. Maximal degree in co-relation 15470. Up to 6273 conditions per place. [2023-08-24 12:37:30,586 INFO L140 encePairwiseOnDemand]: 386/389 looper letters, 64 selfloop transitions, 2 changer transitions 1/80 dead transitions. [2023-08-24 12:37:30,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 392 flow [2023-08-24 12:37:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-24 12:37:30,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5124250214224507 [2023-08-24 12:37:30,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-24 12:37:30,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-24 12:37:30,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:30,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-24 12:37:30,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:30,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:30,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:30,594 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 216 flow. Second operand 3 states and 598 transitions. [2023-08-24 12:37:30,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 392 flow [2023-08-24 12:37:30,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 386 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 12:37:30,623 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 218 flow [2023-08-24 12:37:30,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-08-24 12:37:30,624 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2023-08-24 12:37:30,624 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 218 flow [2023-08-24 12:37:30,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:30,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:30,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 12:37:30,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:37:30,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:30,635 INFO L85 PathProgramCache]: Analyzing trace with hash 169205194, now seen corresponding path program 1 times [2023-08-24 12:37:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:30,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755316703] [2023-08-24 12:37:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:30,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:30,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755316703] [2023-08-24 12:37:30,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755316703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:30,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200591312] [2023-08-24 12:37:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:30,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:30,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:30,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:37:30,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 12:37:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:30,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 12:37:30,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:31,031 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 12:37:31,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 12:37:31,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 12:37:31,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 12:37:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:31,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:31,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200591312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:31,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:31,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-24 12:37:31,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2737773] [2023-08-24 12:37:31,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:31,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 12:37:31,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:31,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 12:37:31,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=59, Unknown=4, NotChecked=0, Total=90 [2023-08-24 12:37:31,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 389 [2023-08-24 12:37:31,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 148.3) internal successors, (1483), 10 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:31,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:31,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 389 [2023-08-24 12:37:31,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:32,117 INFO L124 PetriNetUnfolderBase]: 4536/7559 cut-off events. [2023-08-24 12:37:32,118 INFO L125 PetriNetUnfolderBase]: For 2438/2440 co-relation queries the response was YES. [2023-08-24 12:37:32,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17059 conditions, 7559 events. 4536/7559 cut-off events. For 2438/2440 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 49157 event pairs, 2537 based on Foata normal form. 1/6681 useless extension candidates. Maximal degree in co-relation 16934. Up to 5754 conditions per place. [2023-08-24 12:37:32,157 INFO L140 encePairwiseOnDemand]: 383/389 looper letters, 74 selfloop transitions, 7 changer transitions 25/116 dead transitions. [2023-08-24 12:37:32,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 116 transitions, 565 flow [2023-08-24 12:37:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:37:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:37:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 836 transitions. [2023-08-24 12:37:32,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42982005141388174 [2023-08-24 12:37:32,161 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 836 transitions. [2023-08-24 12:37:32,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 836 transitions. [2023-08-24 12:37:32,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:32,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 836 transitions. [2023-08-24 12:37:32,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 389.0) internal successors, (2334), 6 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,168 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 389.0) internal successors, (2334), 6 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,168 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 218 flow. Second operand 5 states and 836 transitions. [2023-08-24 12:37:32,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 116 transitions, 565 flow [2023-08-24 12:37:32,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 116 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 12:37:32,175 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 223 flow [2023-08-24 12:37:32,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-08-24 12:37:32,176 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2023-08-24 12:37:32,176 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 223 flow [2023-08-24 12:37:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.3) internal successors, (1483), 10 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:32,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:32,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 12:37:32,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:32,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 12:37:32,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash 113126560, now seen corresponding path program 1 times [2023-08-24 12:37:32,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:32,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836567180] [2023-08-24 12:37:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:32,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:32,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:32,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836567180] [2023-08-24 12:37:32,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836567180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:32,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842329373] [2023-08-24 12:37:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:32,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:32,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:32,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:37:32,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 12:37:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:32,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:37:32,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:32,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:32,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842329373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:32,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:32,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:37:32,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133163289] [2023-08-24 12:37:32,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:32,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:37:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:37:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:37:32,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 389 [2023-08-24 12:37:32,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 223 flow. Second operand has 7 states, 7 states have (on average 181.57142857142858) internal successors, (1271), 7 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:32,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 389 [2023-08-24 12:37:32,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:32,634 INFO L124 PetriNetUnfolderBase]: 20/77 cut-off events. [2023-08-24 12:37:32,634 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-24 12:37:32,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 77 events. 20/77 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 191 event pairs, 5 based on Foata normal form. 15/89 useless extension candidates. Maximal degree in co-relation 199. Up to 50 conditions per place. [2023-08-24 12:37:32,635 INFO L140 encePairwiseOnDemand]: 386/389 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2023-08-24 12:37:32,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 183 flow [2023-08-24 12:37:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:37:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:37:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-08-24 12:37:32,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480719794344473 [2023-08-24 12:37:32,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-08-24 12:37:32,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-08-24 12:37:32,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:32,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-08-24 12:37:32,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,643 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,643 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 223 flow. Second operand 4 states and 748 transitions. [2023-08-24 12:37:32,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 183 flow [2023-08-24 12:37:32,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 143 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-24 12:37:32,644 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-24 12:37:32,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-24 12:37:32,645 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -29 predicate places. [2023-08-24 12:37:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-24 12:37:32,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.57142857142858) internal successors, (1271), 7 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:32,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 12:37:32,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 12:37:32,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 12:37:32,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 12:37:32,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 12:37:32,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-24 12:37:32,857 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 12:37:32,859 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-24 12:37:32,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:32,894 INFO L124 PetriNetUnfolderBase]: 58/396 cut-off events. [2023-08-24 12:37:32,894 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-24 12:37:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 396 events. 58/396 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1684 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-24 12:37:32,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:32,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:32,900 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:32,900 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:32,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:32,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 221 transitions, 464 flow [2023-08-24 12:37:32,930 INFO L124 PetriNetUnfolderBase]: 58/396 cut-off events. [2023-08-24 12:37:32,931 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-24 12:37:32,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 396 events. 58/396 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1684 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 210. Up to 8 conditions per place. [2023-08-24 12:37:32,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 19642 [2023-08-24 12:37:36,903 INFO L134 LiptonReduction]: Checked pairs total: 31401 [2023-08-24 12:37:36,903 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-24 12:37:36,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:37:36,915 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21be6f7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:36,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 12:37:36,918 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:36,918 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-24 12:37:36,918 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:36,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:36,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:37:36,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:37:36,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1117214091, now seen corresponding path program 1 times [2023-08-24 12:37:36,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:36,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689669769] [2023-08-24 12:37:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:36,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:36,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:37:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:36,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:37:36,964 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:37:36,964 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 12:37:36,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-24 12:37:36,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 12:37:36,967 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:37:36,968 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-24 12:37:36,969 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:37:36,969 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:37:37,032 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-24 12:37:37,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 349 transitions, 746 flow [2023-08-24 12:37:37,187 INFO L124 PetriNetUnfolderBase]: 197/1149 cut-off events. [2023-08-24 12:37:37,187 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-24 12:37:37,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 1149 events. 197/1149 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6951 event pairs, 2 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 697. Up to 32 conditions per place. [2023-08-24 12:37:37,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 349 transitions, 746 flow [2023-08-24 12:37:37,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 349 transitions, 746 flow [2023-08-24 12:37:37,226 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:37,227 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 298 places, 349 transitions, 746 flow [2023-08-24 12:37:37,227 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 298 places, 349 transitions, 746 flow [2023-08-24 12:37:37,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 298 places, 349 transitions, 746 flow [2023-08-24 12:37:37,372 INFO L124 PetriNetUnfolderBase]: 197/1149 cut-off events. [2023-08-24 12:37:37,372 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-24 12:37:37,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 1149 events. 197/1149 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6951 event pairs, 2 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 697. Up to 32 conditions per place. [2023-08-24 12:37:37,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 71492 [2023-08-24 12:37:42,469 INFO L134 LiptonReduction]: Checked pairs total: 149917 [2023-08-24 12:37:42,469 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-24 12:37:42,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:42,472 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21be6f7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:42,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 12:37:42,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:42,475 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2023-08-24 12:37:42,475 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:37:42,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:42,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:42,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t1_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 12:37:42,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1434618365, now seen corresponding path program 1 times [2023-08-24 12:37:42,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:42,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472791267] [2023-08-24 12:37:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:42,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:42,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:42,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472791267] [2023-08-24 12:37:42,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472791267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:42,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:42,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 12:37:42,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336356184] [2023-08-24 12:37:42,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:42,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 12:37:42,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 12:37:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 12:37:42,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 601 [2023-08-24 12:37:42,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 144 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 234.4) internal successors, (1172), 5 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:42,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:42,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 601 [2023-08-24 12:37:42,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand