/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:10:00,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:10:00,777 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-SemanticLbe.epf [2023-11-17 12:10:00,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:10:00,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:10:00,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:10:00,818 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:10:00,818 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:10:00,819 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:10:00,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:10:00,824 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:10:00,824 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:10:00,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:10:00,826 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:10:00,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:10:00,826 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:10:00,826 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:10:00,826 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:10:00,827 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:10:00,827 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:10:00,827 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:10:00,828 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:10:00,828 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:10:00,828 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:10:00,828 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:10:00,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:10:00,829 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:10:00,829 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:10:00,829 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:10:00,830 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:10:00,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:10:00,831 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:10:00,831 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:10:01,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:10:01,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:10:01,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:10:01,118 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:10:01,119 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:10:01,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-11-17 12:10:02,334 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:10:02,557 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:10:02,558 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-11-17 12:10:02,569 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06dea242/b726261a34ff4dff95194c37bd5d508c/FLAG45c06c19e [2023-11-17 12:10:02,590 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e06dea242/b726261a34ff4dff95194c37bd5d508c [2023-11-17 12:10:02,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:10:02,594 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:10:02,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:10:02,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:10:02,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:10:02,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a093d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02, skipping insertion in model container [2023-11-17 12:10:02,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,643 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:10:02,794 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4345,4358] [2023-11-17 12:10:02,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:10:02,812 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:10:02,839 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4345,4358] [2023-11-17 12:10:02,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:10:02,853 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:10:02,853 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:10:02,860 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:10:02,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02 WrapperNode [2023-11-17 12:10:02,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:10:02,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:10:02,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:10:02,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:10:02,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,908 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 335 [2023-11-17 12:10:02,908 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:10:02,909 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:10:02,909 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:10:02,909 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:10:02,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,923 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,939 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:10:02,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:10:02,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:10:02,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:10:02,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (1/1) ... [2023-11-17 12:10:02,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:10:02,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:03,015 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) [2023-11-17 12:10:03,033 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 [2023-11-17 12:10:03,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:10:03,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:10:03,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:10:03,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:10:03,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:10:03,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:10:03,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:10:03,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:10:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:10:03,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:10:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 12:10:03,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 12:10:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:10:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:10:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:10:03,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:10:03,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:10:03,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:10:03,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:10:03,062 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:10:03,228 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:10:03,231 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:10:03,740 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:10:04,147 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:10:04,147 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 12:10:04,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:10:04 BoogieIcfgContainer [2023-11-17 12:10:04,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:10:04,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:10:04,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:10:04,156 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:10:04,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:10:02" (1/3) ... [2023-11-17 12:10:04,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56376d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:10:04, skipping insertion in model container [2023-11-17 12:10:04,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:02" (2/3) ... [2023-11-17 12:10:04,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56376d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:10:04, skipping insertion in model container [2023-11-17 12:10:04,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:10:04" (3/3) ... [2023-11-17 12:10:04,159 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-11-17 12:10:04,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:10:04,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:10:04,178 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:10:04,250 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 12:10:04,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 53 transitions, 134 flow [2023-11-17 12:10:04,336 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2023-11-17 12:10:04,336 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:10:04,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 49 events. 6/49 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-17 12:10:04,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 53 transitions, 134 flow [2023-11-17 12:10:04,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 48 transitions, 120 flow [2023-11-17 12:10:04,350 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:10:04,367 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 48 transitions, 120 flow [2023-11-17 12:10:04,371 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 48 transitions, 120 flow [2023-11-17 12:10:04,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 120 flow [2023-11-17 12:10:04,398 INFO L124 PetriNetUnfolderBase]: 6/48 cut-off events. [2023-11-17 12:10:04,399 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:10:04,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 48 events. 6/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-17 12:10:04,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 870 [2023-11-17 12:10:05,428 INFO L134 LiptonReduction]: Checked pairs total: 1043 [2023-11-17 12:10:05,429 INFO L136 LiptonReduction]: Total number of compositions: 11 [2023-11-17 12:10:05,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:10:05,456 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f382082, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:10:05,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 12:10:05,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:10:05,480 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-17 12:10:05,480 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:10:05,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:05,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:05,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:10:05,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1303240506, now seen corresponding path program 1 times [2023-11-17 12:10:05,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:05,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985670867] [2023-11-17 12:10:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:05,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:06,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:06,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985670867] [2023-11-17 12:10:06,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985670867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:06,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:06,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:10:06,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398532612] [2023-11-17 12:10:06,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:06,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:10:06,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:10:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:10:06,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2023-11-17 12:10:06,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2023-11-17 12:10:06,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:06,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2023-11-17 12:10:06,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:07,191 INFO L124 PetriNetUnfolderBase]: 4823/6426 cut-off events. [2023-11-17 12:10:07,191 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2023-11-17 12:10:07,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13303 conditions, 6426 events. 4823/6426 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27390 event pairs, 501 based on Foata normal form. 0/5184 useless extension candidates. Maximal degree in co-relation 10814. Up to 3439 conditions per place. [2023-11-17 12:10:07,236 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 91 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2023-11-17 12:10:07,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 99 transitions, 451 flow [2023-11-17 12:10:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:10:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:10:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2023-11-17 12:10:07,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2023-11-17 12:10:07,250 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 196 transitions. [2023-11-17 12:10:07,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 196 transitions. [2023-11-17 12:10:07,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:07,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 196 transitions. [2023-11-17 12:10:07,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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) [2023-11-17 12:10:07,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 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) [2023-11-17 12:10:07,264 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 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) [2023-11-17 12:10:07,266 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 6 states and 196 transitions. [2023-11-17 12:10:07,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 99 transitions, 451 flow [2023-11-17 12:10:07,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 99 transitions, 413 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 12:10:07,278 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 129 flow [2023-11-17 12:10:07,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-17 12:10:07,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-11-17 12:10:07,284 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 129 flow [2023-11-17 12:10:07,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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) [2023-11-17 12:10:07,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:07,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:07,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:10:07,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:10:07,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash 364018750, now seen corresponding path program 1 times [2023-11-17 12:10:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:07,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836893869] [2023-11-17 12:10:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:07,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:07,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:07,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836893869] [2023-11-17 12:10:07,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836893869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:07,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:07,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:10:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367433030] [2023-11-17 12:10:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:07,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:10:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:10:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:10:07,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2023-11-17 12:10:07,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2023-11-17 12:10:07,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:07,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2023-11-17 12:10:07,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:08,011 INFO L124 PetriNetUnfolderBase]: 4167/5610 cut-off events. [2023-11-17 12:10:08,012 INFO L125 PetriNetUnfolderBase]: For 2151/2151 co-relation queries the response was YES. [2023-11-17 12:10:08,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13760 conditions, 5610 events. 4167/5610 cut-off events. For 2151/2151 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 23195 event pairs, 1055 based on Foata normal form. 160/4801 useless extension candidates. Maximal degree in co-relation 7970. Up to 4435 conditions per place. [2023-11-17 12:10:08,052 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 56 selfloop transitions, 2 changer transitions 4/63 dead transitions. [2023-11-17 12:10:08,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 63 transitions, 304 flow [2023-11-17 12:10:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:10:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:10:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-17 12:10:08,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2023-11-17 12:10:08,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-17 12:10:08,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-17 12:10:08,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:08,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-17 12:10:08,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-11-17 12:10:08,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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) [2023-11-17 12:10:08,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 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) [2023-11-17 12:10:08,056 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 129 flow. Second operand 3 states and 115 transitions. [2023-11-17 12:10:08,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 63 transitions, 304 flow [2023-11-17 12:10:08,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 63 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 12:10:08,066 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 136 flow [2023-11-17 12:10:08,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-17 12:10:08,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-11-17 12:10:08,067 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 136 flow [2023-11-17 12:10:08,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2023-11-17 12:10:08,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:08,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:08,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:10:08,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:10:08,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1816023522, now seen corresponding path program 1 times [2023-11-17 12:10:08,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:08,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950148757] [2023-11-17 12:10:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:08,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:08,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950148757] [2023-11-17 12:10:08,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950148757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:08,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:08,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:10:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991143698] [2023-11-17 12:10:08,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:10:08,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:10:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:10:08,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2023-11-17 12:10:08,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2023-11-17 12:10:08,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:08,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2023-11-17 12:10:08,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:08,834 INFO L124 PetriNetUnfolderBase]: 4930/6727 cut-off events. [2023-11-17 12:10:08,835 INFO L125 PetriNetUnfolderBase]: For 3022/3022 co-relation queries the response was YES. [2023-11-17 12:10:08,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16139 conditions, 6727 events. 4930/6727 cut-off events. For 3022/3022 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28546 event pairs, 3744 based on Foata normal form. 90/6037 useless extension candidates. Maximal degree in co-relation 10972. Up to 5243 conditions per place. [2023-11-17 12:10:08,884 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 39 selfloop transitions, 2 changer transitions 27/71 dead transitions. [2023-11-17 12:10:08,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 348 flow [2023-11-17 12:10:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:10:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:10:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2023-11-17 12:10:08,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2023-11-17 12:10:08,887 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 169 transitions. [2023-11-17 12:10:08,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 169 transitions. [2023-11-17 12:10:08,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:08,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 169 transitions. [2023-11-17 12:10:08,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 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) [2023-11-17 12:10:08,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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) [2023-11-17 12:10:08,891 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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) [2023-11-17 12:10:08,891 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 136 flow. Second operand 5 states and 169 transitions. [2023-11-17 12:10:08,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 348 flow [2023-11-17 12:10:08,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:10:08,906 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 152 flow [2023-11-17 12:10:08,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-17 12:10:08,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-11-17 12:10:08,908 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 152 flow [2023-11-17 12:10:08,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2023-11-17 12:10:08,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:08,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:08,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:10:08,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:10:08,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:08,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2031632205, now seen corresponding path program 1 times [2023-11-17 12:10:08,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:08,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493486542] [2023-11-17 12:10:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:08,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:10:09,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:09,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493486542] [2023-11-17 12:10:09,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493486542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:09,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116295068] [2023-11-17 12:10:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:09,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:09,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:09,165 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) [2023-11-17 12:10:09,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:10:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:09,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:10:09,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:10:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:10:09,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:10:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:10:09,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116295068] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:09,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:10:09,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-11-17 12:10:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140527749] [2023-11-17 12:10:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:09,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:10:09,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:09,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:10:09,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:10:09,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 64 [2023-11-17 12:10:09,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2023-11-17 12:10:09,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:09,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 64 [2023-11-17 12:10:09,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:10,661 INFO L124 PetriNetUnfolderBase]: 7185/9639 cut-off events. [2023-11-17 12:10:10,662 INFO L125 PetriNetUnfolderBase]: For 3455/3455 co-relation queries the response was YES. [2023-11-17 12:10:10,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24237 conditions, 9639 events. 7185/9639 cut-off events. For 3455/3455 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 43196 event pairs, 203 based on Foata normal form. 160/8718 useless extension candidates. Maximal degree in co-relation 24220. Up to 2672 conditions per place. [2023-11-17 12:10:10,725 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 110 selfloop transitions, 15 changer transitions 0/126 dead transitions. [2023-11-17 12:10:10,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 126 transitions, 630 flow [2023-11-17 12:10:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:10:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:10:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2023-11-17 12:10:10,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49330357142857145 [2023-11-17 12:10:10,727 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 221 transitions. [2023-11-17 12:10:10,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 221 transitions. [2023-11-17 12:10:10,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:10,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 221 transitions. [2023-11-17 12:10:10,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 31.571428571428573) internal successors, (221), 7 states have internal predecessors, (221), 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) [2023-11-17 12:10:10,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 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) [2023-11-17 12:10:10,729 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 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) [2023-11-17 12:10:10,729 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 152 flow. Second operand 7 states and 221 transitions. [2023-11-17 12:10:10,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 126 transitions, 630 flow [2023-11-17 12:10:10,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 126 transitions, 620 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 12:10:10,744 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 249 flow [2023-11-17 12:10:10,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-17 12:10:10,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2023-11-17 12:10:10,745 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 249 flow [2023-11-17 12:10:10,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2023-11-17 12:10:10,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:10,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:10,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 12:10:10,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:10,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:10:10,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1657101355, now seen corresponding path program 1 times [2023-11-17 12:10:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:10,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651117397] [2023-11-17 12:10:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:10,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:12,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:12,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651117397] [2023-11-17 12:10:12,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651117397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:12,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446484631] [2023-11-17 12:10:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:12,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:12,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:12,103 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) [2023-11-17 12:10:12,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:10:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:12,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:10:12,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:10:12,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 12:10:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:12,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:10:12,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:10:12,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 17 [2023-11-17 12:10:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:12,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446484631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:10:12,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:10:12,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-11-17 12:10:12,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069479415] [2023-11-17 12:10:12,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:10:12,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:10:12,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:10:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:10:12,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2023-11-17 12:10:12,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 249 flow. Second operand has 21 states, 21 states have (on average 22.523809523809526) internal successors, (473), 21 states have internal predecessors, (473), 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) [2023-11-17 12:10:12,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:12,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2023-11-17 12:10:12,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:20,310 INFO L124 PetriNetUnfolderBase]: 42344/56023 cut-off events. [2023-11-17 12:10:20,310 INFO L125 PetriNetUnfolderBase]: For 71037/71037 co-relation queries the response was YES. [2023-11-17 12:10:20,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164587 conditions, 56023 events. 42344/56023 cut-off events. For 71037/71037 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 301576 event pairs, 4078 based on Foata normal form. 324/48785 useless extension candidates. Maximal degree in co-relation 117565. Up to 12021 conditions per place. [2023-11-17 12:10:20,757 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 431 selfloop transitions, 101 changer transitions 28/561 dead transitions. [2023-11-17 12:10:20,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 561 transitions, 3316 flow [2023-11-17 12:10:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:10:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:10:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 987 transitions. [2023-11-17 12:10:20,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5931490384615384 [2023-11-17 12:10:20,763 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 987 transitions. [2023-11-17 12:10:20,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 987 transitions. [2023-11-17 12:10:20,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:20,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 987 transitions. [2023-11-17 12:10:20,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 37.96153846153846) internal successors, (987), 26 states have internal predecessors, (987), 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) [2023-11-17 12:10:20,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 64.0) internal successors, (1728), 27 states have internal predecessors, (1728), 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) [2023-11-17 12:10:20,769 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 64.0) internal successors, (1728), 27 states have internal predecessors, (1728), 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) [2023-11-17 12:10:20,769 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 249 flow. Second operand 26 states and 987 transitions. [2023-11-17 12:10:20,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 561 transitions, 3316 flow [2023-11-17 12:10:21,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 561 transitions, 3296 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 12:10:21,277 INFO L231 Difference]: Finished difference. Result has 94 places, 160 transitions, 1266 flow [2023-11-17 12:10:21,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1266, PETRI_PLACES=94, PETRI_TRANSITIONS=160} [2023-11-17 12:10:21,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2023-11-17 12:10:21,278 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 160 transitions, 1266 flow [2023-11-17 12:10:21,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.523809523809526) internal successors, (473), 21 states have internal predecessors, (473), 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) [2023-11-17 12:10:21,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:21,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:21,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 12:10:21,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:21,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:10:21,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1157641836, now seen corresponding path program 2 times [2023-11-17 12:10:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:21,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348646315] [2023-11-17 12:10:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:22,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348646315] [2023-11-17 12:10:22,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348646315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122995067] [2023-11-17 12:10:22,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:10:22,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:22,397 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:10:22,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:10:22,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:10:22,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:10:22,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 12:10:22,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:10:22,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 502 treesize of output 494 [2023-11-17 12:10:22,763 INFO L378 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 20 treesize of output 15 [2023-11-17 12:10:22,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-17 12:10:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:10:22,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:10:22,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:10:22,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 37 [2023-11-17 12:10:22,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 12:10:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:10:23,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122995067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:10:23,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:10:23,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-11-17 12:10:23,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428851150] [2023-11-17 12:10:23,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:10:23,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:10:23,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:23,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:10:23,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=289, Unknown=1, NotChecked=0, Total=342 [2023-11-17 12:10:23,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2023-11-17 12:10:23,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 160 transitions, 1266 flow. Second operand has 19 states, 19 states have (on average 22.789473684210527) internal successors, (433), 19 states have internal predecessors, (433), 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) [2023-11-17 12:10:23,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:23,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2023-11-17 12:10:23,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:32,264 INFO L124 PetriNetUnfolderBase]: 64632/85330 cut-off events. [2023-11-17 12:10:32,264 INFO L125 PetriNetUnfolderBase]: For 244422/244422 co-relation queries the response was YES. [2023-11-17 12:10:32,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297773 conditions, 85330 events. 64632/85330 cut-off events. For 244422/244422 co-relation queries the response was YES. Maximal size of possible extension queue 2370. Compared 483533 event pairs, 10415 based on Foata normal form. 4/80574 useless extension candidates. Maximal degree in co-relation 271756. Up to 33689 conditions per place. [2023-11-17 12:10:33,160 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 221 selfloop transitions, 110 changer transitions 11/343 dead transitions. [2023-11-17 12:10:33,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 343 transitions, 3010 flow [2023-11-17 12:10:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:10:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:10:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 423 transitions. [2023-11-17 12:10:33,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084134615384616 [2023-11-17 12:10:33,162 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 423 transitions. [2023-11-17 12:10:33,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 423 transitions. [2023-11-17 12:10:33,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:33,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 423 transitions. [2023-11-17 12:10:33,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 32.53846153846154) internal successors, (423), 13 states have internal predecessors, (423), 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) [2023-11-17 12:10:33,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 64.0) internal successors, (896), 14 states have internal predecessors, (896), 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) [2023-11-17 12:10:33,166 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 64.0) internal successors, (896), 14 states have internal predecessors, (896), 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) [2023-11-17 12:10:33,166 INFO L175 Difference]: Start difference. First operand has 94 places, 160 transitions, 1266 flow. Second operand 13 states and 423 transitions. [2023-11-17 12:10:33,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 343 transitions, 3010 flow [2023-11-17 12:10:35,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 343 transitions, 2946 flow, removed 31 selfloop flow, removed 1 redundant places. [2023-11-17 12:10:35,915 INFO L231 Difference]: Finished difference. Result has 107 places, 206 transitions, 1959 flow [2023-11-17 12:10:35,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1959, PETRI_PLACES=107, PETRI_TRANSITIONS=206} [2023-11-17 12:10:35,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2023-11-17 12:10:35,916 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 206 transitions, 1959 flow [2023-11-17 12:10:35,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 22.789473684210527) internal successors, (433), 19 states have internal predecessors, (433), 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) [2023-11-17 12:10:35,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:35,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:35,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:10:36,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:36,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:10:36,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1830829072, now seen corresponding path program 3 times [2023-11-17 12:10:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:36,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989991008] [2023-11-17 12:10:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:36,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:37,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:37,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989991008] [2023-11-17 12:10:37,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989991008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95599085] [2023-11-17 12:10:37,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:10:37,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:37,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:37,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:10:37,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:10:37,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:10:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:10:37,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:10:37,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:10:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:10:37,499 INFO L378 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 20 treesize of output 15 [2023-11-17 12:10:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:10:37,541 INFO L378 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 20 treesize of output 15 [2023-11-17 12:10:37,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-17 12:10:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:10:37,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:10:39,708 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_250 (Array Int Int)) (v_ArrVal_251 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_250) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_251) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-11-17 12:10:39,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:10:39,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 173 treesize of output 157 [2023-11-17 12:10:39,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-11-17 12:10:39,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-17 12:10:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-17 12:10:39,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95599085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:10:39,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:10:39,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-17 12:10:39,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105010957] [2023-11-17 12:10:39,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:10:39,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:10:39,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:39,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:10:39,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=4, NotChecked=40, Total=506 [2023-11-17 12:10:39,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2023-11-17 12:10:39,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 206 transitions, 1959 flow. Second operand has 23 states, 23 states have (on average 22.73913043478261) internal successors, (523), 23 states have internal predecessors, (523), 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) [2023-11-17 12:10:39,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:39,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2023-11-17 12:10:39,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:51,555 INFO L124 PetriNetUnfolderBase]: 82558/108834 cut-off events. [2023-11-17 12:10:51,555 INFO L125 PetriNetUnfolderBase]: For 408130/408130 co-relation queries the response was YES. [2023-11-17 12:10:52,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399903 conditions, 108834 events. 82558/108834 cut-off events. For 408130/408130 co-relation queries the response was YES. Maximal size of possible extension queue 3081. Compared 633605 event pairs, 15274 based on Foata normal form. 4/102738 useless extension candidates. Maximal degree in co-relation 364455. Up to 36095 conditions per place. [2023-11-17 12:10:52,548 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 230 selfloop transitions, 131 changer transitions 11/373 dead transitions. [2023-11-17 12:10:52,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 373 transitions, 3651 flow [2023-11-17 12:10:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:10:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:10:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 423 transitions. [2023-11-17 12:10:52,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084134615384616 [2023-11-17 12:10:52,551 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 423 transitions. [2023-11-17 12:10:52,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 423 transitions. [2023-11-17 12:10:52,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:52,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 423 transitions. [2023-11-17 12:10:52,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 32.53846153846154) internal successors, (423), 13 states have internal predecessors, (423), 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) [2023-11-17 12:10:52,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 64.0) internal successors, (896), 14 states have internal predecessors, (896), 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) [2023-11-17 12:10:52,554 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 64.0) internal successors, (896), 14 states have internal predecessors, (896), 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) [2023-11-17 12:10:52,554 INFO L175 Difference]: Start difference. First operand has 107 places, 206 transitions, 1959 flow. Second operand 13 states and 423 transitions. [2023-11-17 12:10:52,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 373 transitions, 3651 flow [2023-11-17 12:10:59,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 373 transitions, 3576 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 12:10:59,803 INFO L231 Difference]: Finished difference. Result has 117 places, 232 transitions, 2534 flow [2023-11-17 12:10:59,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2534, PETRI_PLACES=117, PETRI_TRANSITIONS=232} [2023-11-17 12:10:59,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2023-11-17 12:10:59,804 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 232 transitions, 2534 flow [2023-11-17 12:10:59,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 22.73913043478261) internal successors, (523), 23 states have internal predecessors, (523), 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) [2023-11-17 12:10:59,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:59,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:59,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 12:11:00,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:00,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:11:00,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1348620718, now seen corresponding path program 4 times [2023-11-17 12:11:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:00,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749414056] [2023-11-17 12:11:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:00,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749414056] [2023-11-17 12:11:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749414056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:01,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270638851] [2023-11-17 12:11:01,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:11:01,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:01,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:01,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:11:01,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:11:01,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:01,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 12:11:01,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:01,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:11:01,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-17 12:11:01,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-17 12:11:01,700 INFO L378 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 21 treesize of output 16 [2023-11-17 12:11:01,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:11:01,785 INFO L378 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 21 treesize of output 16 [2023-11-17 12:11:01,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-11-17 12:11:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:01,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:02,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:02,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2721 treesize of output 2593 [2023-11-17 12:11:02,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 67 [2023-11-17 12:11:02,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2023-11-17 12:11:02,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2023-11-17 12:11:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:02,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270638851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:02,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:02,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-11-17 12:11:02,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670330207] [2023-11-17 12:11:02,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:02,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:11:02,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:02,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:11:02,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=634, Unknown=3, NotChecked=0, Total=756 [2023-11-17 12:11:02,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2023-11-17 12:11:02,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 232 transitions, 2534 flow. Second operand has 28 states, 28 states have (on average 21.821428571428573) internal successors, (611), 28 states have internal predecessors, (611), 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) [2023-11-17 12:11:02,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:02,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2023-11-17 12:11:02,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:05,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]