/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:08:15,707 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:08:15,774 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 16:08:15,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:08:15,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:08:15,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:08:15,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:08:15,815 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:08:15,815 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:08:15,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:08:15,816 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:08:15,816 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:08:15,816 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:08:15,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:08:15,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:08:15,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:08:15,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:08:15,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:08:15,818 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:08:15,819 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:08:15,819 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:08:15,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:08:15,824 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:08:15,824 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:08:15,830 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:08:15,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:15,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:08:15,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:08:15,831 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:08:15,831 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:08:15,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:08:15,832 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:08:15,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:08:16,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:08:16,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:08:16,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:08:16,078 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:08:16,079 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:08:16,080 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-17 16:08:17,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:08:17,401 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:08:17,402 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-commit-1.wvr-bad.c [2023-11-17 16:08:17,410 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142711c2f/9354efe3c6d04b34847c8880f707f444/FLAG5cfbcbe6e [2023-11-17 16:08:17,427 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142711c2f/9354efe3c6d04b34847c8880f707f444 [2023-11-17 16:08:17,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:08:17,433 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:08:17,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:17,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:08:17,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:08:17,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0b58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17, skipping insertion in model container [2023-11-17 16:08:17,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,482 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:08:17,649 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-commit-1.wvr-bad.c[5161,5174] [2023-11-17 16:08:17,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:17,666 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:08:17,690 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-commit-1.wvr-bad.c[5161,5174] [2023-11-17 16:08:17,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:17,700 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:17,700 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:17,711 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:08:17,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17 WrapperNode [2023-11-17 16:08:17,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:17,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:17,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:08:17,712 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:08:17,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,763 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 352 [2023-11-17 16:08:17,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:17,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:08:17,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:08:17,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:08:17,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,807 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,811 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:08:17,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:08:17,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:08:17,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:08:17,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (1/1) ... [2023-11-17 16:08:17,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:17,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:17,874 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 16:08:17,884 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 16:08:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:08:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:08:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:08:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:08:17,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:08:17,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:08:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:08:17,900 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:08:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:08:17,900 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:08:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:08:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:08:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:08:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:08:17,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:08:17,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:08:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:08:17,902 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 16:08:18,005 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:08:18,007 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:08:18,426 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:08:18,594 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:08:18,594 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 16:08:18,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:18 BoogieIcfgContainer [2023-11-17 16:08:18,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:08:18,598 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:08:18,598 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:08:18,601 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:08:18,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:08:17" (1/3) ... [2023-11-17 16:08:18,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd1d656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:18, skipping insertion in model container [2023-11-17 16:08:18,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:17" (2/3) ... [2023-11-17 16:08:18,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd1d656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:18, skipping insertion in model container [2023-11-17 16:08:18,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:18" (3/3) ... [2023-11-17 16:08:18,603 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2023-11-17 16:08:18,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:08:18,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:08:18,620 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:08:18,703 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 16:08:18,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 286 transitions, 593 flow [2023-11-17 16:08:18,872 INFO L124 PetriNetUnfolderBase]: 27/283 cut-off events. [2023-11-17 16:08:18,872 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:08:18,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 283 events. 27/283 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 241. Up to 6 conditions per place. [2023-11-17 16:08:18,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 286 transitions, 593 flow [2023-11-17 16:08:18,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 272 transitions, 562 flow [2023-11-17 16:08:18,897 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:08:18,912 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 272 transitions, 562 flow [2023-11-17 16:08:18,915 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 272 transitions, 562 flow [2023-11-17 16:08:18,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 272 transitions, 562 flow [2023-11-17 16:08:18,978 INFO L124 PetriNetUnfolderBase]: 27/272 cut-off events. [2023-11-17 16:08:18,978 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:08:18,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 272 events. 27/272 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 241. Up to 6 conditions per place. [2023-11-17 16:08:18,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-11-17 16:08:28,585 INFO L134 LiptonReduction]: Checked pairs total: 2578 [2023-11-17 16:08:28,585 INFO L136 LiptonReduction]: Total number of compositions: 303 [2023-11-17 16:08:28,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:08:28,604 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;@341f7e02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:08:28,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 16:08:28,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:08:28,610 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2023-11-17 16:08:28,610 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:08:28,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:28,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:28,612 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 1 more)] === [2023-11-17 16:08:28,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash 247648784, now seen corresponding path program 1 times [2023-11-17 16:08:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:28,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444001208] [2023-11-17 16:08:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:29,120 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 16:08:29,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:29,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444001208] [2023-11-17 16:08:29,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444001208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:29,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:29,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:08:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605047805] [2023-11-17 16:08:29,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:29,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:08:29,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:29,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:08:29,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:08:29,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 589 [2023-11-17 16:08:29,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 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 16:08:29,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:29,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 589 [2023-11-17 16:08:29,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:29,322 INFO L124 PetriNetUnfolderBase]: 164/251 cut-off events. [2023-11-17 16:08:29,322 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-17 16:08:29,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 251 events. 164/251 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 603 event pairs, 37 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 376. Up to 167 conditions per place. [2023-11-17 16:08:29,326 INFO L140 encePairwiseOnDemand]: 584/589 looper letters, 36 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2023-11-17 16:08:29,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 197 flow [2023-11-17 16:08:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:08:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:08:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 807 transitions. [2023-11-17 16:08:29,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567062818336163 [2023-11-17 16:08:29,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 807 transitions. [2023-11-17 16:08:29,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 807 transitions. [2023-11-17 16:08:29,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:29,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 807 transitions. [2023-11-17 16:08:29,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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 16:08:29,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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 16:08:29,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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 16:08:29,364 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 68 flow. Second operand 3 states and 807 transitions. [2023-11-17 16:08:29,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 197 flow [2023-11-17 16:08:29,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 175 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 16:08:29,369 INFO L231 Difference]: Finished difference. Result has 26 places, 28 transitions, 82 flow [2023-11-17 16:08:29,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=28} [2023-11-17 16:08:29,374 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-11-17 16:08:29,375 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 28 transitions, 82 flow [2023-11-17 16:08:29,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 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 16:08:29,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:29,376 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] [2023-11-17 16:08:29,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:08:29,376 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 1 more)] === [2023-11-17 16:08:29,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1224416106, now seen corresponding path program 1 times [2023-11-17 16:08:29,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:29,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369040653] [2023-11-17 16:08:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:29,829 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 16:08:29,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:29,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369040653] [2023-11-17 16:08:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369040653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:29,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:29,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:08:29,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783244099] [2023-11-17 16:08:29,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:29,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:29,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:08:29,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 589 [2023-11-17 16:08:29,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 28 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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 16:08:29,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:29,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 589 [2023-11-17 16:08:29,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:30,069 INFO L124 PetriNetUnfolderBase]: 215/343 cut-off events. [2023-11-17 16:08:30,070 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-17 16:08:30,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 343 events. 215/343 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 949 event pairs, 74 based on Foata normal form. 28/365 useless extension candidates. Maximal degree in co-relation 350. Up to 175 conditions per place. [2023-11-17 16:08:30,076 INFO L140 encePairwiseOnDemand]: 579/589 looper letters, 46 selfloop transitions, 12 changer transitions 2/60 dead transitions. [2023-11-17 16:08:30,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 279 flow [2023-11-17 16:08:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:08:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:08:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1280 transitions. [2023-11-17 16:08:30,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36219581211092244 [2023-11-17 16:08:30,083 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1280 transitions. [2023-11-17 16:08:30,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1280 transitions. [2023-11-17 16:08:30,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:30,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1280 transitions. [2023-11-17 16:08:30,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.33333333333334) internal successors, (1280), 6 states have internal predecessors, (1280), 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 16:08:30,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 589.0) internal successors, (4123), 7 states have internal predecessors, (4123), 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 16:08:30,096 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 589.0) internal successors, (4123), 7 states have internal predecessors, (4123), 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 16:08:30,096 INFO L175 Difference]: Start difference. First operand has 26 places, 28 transitions, 82 flow. Second operand 6 states and 1280 transitions. [2023-11-17 16:08:30,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 279 flow [2023-11-17 16:08:30,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:30,099 INFO L231 Difference]: Finished difference. Result has 33 places, 35 transitions, 144 flow [2023-11-17 16:08:30,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=33, PETRI_TRANSITIONS=35} [2023-11-17 16:08:30,102 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-11-17 16:08:30,103 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 35 transitions, 144 flow [2023-11-17 16:08:30,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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 16:08:30,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:30,105 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] [2023-11-17 16:08:30,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:08:30,108 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 1 more)] === [2023-11-17 16:08:30,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1438685769, now seen corresponding path program 1 times [2023-11-17 16:08:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:30,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732745309] [2023-11-17 16:08:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:30,379 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 16:08:30,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:30,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732745309] [2023-11-17 16:08:30,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732745309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:30,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:30,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:08:30,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598509381] [2023-11-17 16:08:30,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:30,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:08:30,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:08:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:08:30,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 589 [2023-11-17 16:08:30,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 35 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 16:08:30,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:30,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 589 [2023-11-17 16:08:30,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:30,583 INFO L124 PetriNetUnfolderBase]: 385/639 cut-off events. [2023-11-17 16:08:30,584 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2023-11-17 16:08:30,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 639 events. 385/639 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2277 event pairs, 198 based on Foata normal form. 42/679 useless extension candidates. Maximal degree in co-relation 992. Up to 354 conditions per place. [2023-11-17 16:08:30,587 INFO L140 encePairwiseOnDemand]: 584/589 looper letters, 58 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-11-17 16:08:30,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 62 transitions, 368 flow [2023-11-17 16:08:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:08:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:08:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 877 transitions. [2023-11-17 16:08:30,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722410865874363 [2023-11-17 16:08:30,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 877 transitions. [2023-11-17 16:08:30,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 877 transitions. [2023-11-17 16:08:30,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:30,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 877 transitions. [2023-11-17 16:08:30,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 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 16:08:30,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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 16:08:30,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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 16:08:30,599 INFO L175 Difference]: Start difference. First operand has 33 places, 35 transitions, 144 flow. Second operand 4 states and 877 transitions. [2023-11-17 16:08:30,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 62 transitions, 368 flow [2023-11-17 16:08:30,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 350 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:30,603 INFO L231 Difference]: Finished difference. Result has 35 places, 36 transitions, 154 flow [2023-11-17 16:08:30,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=35, PETRI_TRANSITIONS=36} [2023-11-17 16:08:30,604 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-11-17 16:08:30,604 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 36 transitions, 154 flow [2023-11-17 16:08:30,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 16:08:30,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:30,605 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] [2023-11-17 16:08:30,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:08:30,605 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 1 more)] === [2023-11-17 16:08:30,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1123957046, now seen corresponding path program 1 times [2023-11-17 16:08:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765017180] [2023-11-17 16:08:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:30,757 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 16:08:30,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:30,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765017180] [2023-11-17 16:08:30,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765017180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:30,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:30,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:08:30,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841443075] [2023-11-17 16:08:30,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:30,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:08:30,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:08:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:08:30,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 589 [2023-11-17 16:08:30,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 36 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 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 16:08:30,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:30,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 589 [2023-11-17 16:08:30,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:30,934 INFO L124 PetriNetUnfolderBase]: 351/619 cut-off events. [2023-11-17 16:08:30,934 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2023-11-17 16:08:30,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 619 events. 351/619 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2285 event pairs, 188 based on Foata normal form. 76/693 useless extension candidates. Maximal degree in co-relation 1162. Up to 431 conditions per place. [2023-11-17 16:08:30,937 INFO L140 encePairwiseOnDemand]: 586/589 looper letters, 54 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-11-17 16:08:30,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 58 transitions, 332 flow [2023-11-17 16:08:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:08:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:08:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1047 transitions. [2023-11-17 16:08:30,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44439728353140917 [2023-11-17 16:08:30,940 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1047 transitions. [2023-11-17 16:08:30,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1047 transitions. [2023-11-17 16:08:30,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:30,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1047 transitions. [2023-11-17 16:08:30,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 261.75) internal successors, (1047), 4 states have internal predecessors, (1047), 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 16:08:30,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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 16:08:30,949 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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 16:08:30,949 INFO L175 Difference]: Start difference. First operand has 35 places, 36 transitions, 154 flow. Second operand 4 states and 1047 transitions. [2023-11-17 16:08:30,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 58 transitions, 332 flow [2023-11-17 16:08:30,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 58 transitions, 314 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:30,954 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 147 flow [2023-11-17 16:08:30,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-17 16:08:30,956 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-11-17 16:08:30,956 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 147 flow [2023-11-17 16:08:30,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 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 16:08:30,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:30,957 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] [2023-11-17 16:08:30,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:08:30,957 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 1 more)] === [2023-11-17 16:08:30,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2022397009, now seen corresponding path program 1 times [2023-11-17 16:08:30,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:30,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44347456] [2023-11-17 16:08:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:30,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:31,121 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 16:08:31,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:31,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44347456] [2023-11-17 16:08:31,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44347456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:31,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38619792] [2023-11-17 16:08:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:31,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:31,129 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 16:08:31,172 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 16:08:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:31,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 16:08:31,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:31,430 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 16:08:31,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:31,754 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 16:08:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38619792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:31,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:31,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-17 16:08:31,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977094689] [2023-11-17 16:08:31,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:31,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:08:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:31,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:08:31,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:08:31,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 589 [2023-11-17 16:08:31,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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 16:08:31,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:31,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 589 [2023-11-17 16:08:31,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:31,900 INFO L124 PetriNetUnfolderBase]: 274/453 cut-off events. [2023-11-17 16:08:31,900 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-11-17 16:08:31,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 453 events. 274/453 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1401 event pairs, 130 based on Foata normal form. 1/453 useless extension candidates. Maximal degree in co-relation 1151. Up to 265 conditions per place. [2023-11-17 16:08:31,903 INFO L140 encePairwiseOnDemand]: 586/589 looper letters, 36 selfloop transitions, 2 changer transitions 6/44 dead transitions. [2023-11-17 16:08:31,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 260 flow [2023-11-17 16:08:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:08:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:08:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 790 transitions. [2023-11-17 16:08:31,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470854555744199 [2023-11-17 16:08:31,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 790 transitions. [2023-11-17 16:08:31,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 790 transitions. [2023-11-17 16:08:31,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:31,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 790 transitions. [2023-11-17 16:08:31,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 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 16:08:31,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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 16:08:31,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 589.0) internal successors, (2356), 4 states have internal predecessors, (2356), 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 16:08:31,913 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 147 flow. Second operand 3 states and 790 transitions. [2023-11-17 16:08:31,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 260 flow [2023-11-17 16:08:31,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 248 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 16:08:31,915 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 143 flow [2023-11-17 16:08:31,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2023-11-17 16:08:31,917 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2023-11-17 16:08:31,918 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 143 flow [2023-11-17 16:08:31,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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 16:08:31,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:31,919 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] [2023-11-17 16:08:31,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:32,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:32,129 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 1 more)] === [2023-11-17 16:08:32,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1038680965, now seen corresponding path program 1 times [2023-11-17 16:08:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871193004] [2023-11-17 16:08:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:32,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:33,480 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 16:08:33,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:33,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871193004] [2023-11-17 16:08:33,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871193004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:33,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834770890] [2023-11-17 16:08:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:33,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:33,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:33,483 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 16:08:33,501 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 16:08:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:33,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:08:33,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:33,888 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 16:08:33,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:35,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:35,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 314 treesize of output 429 [2023-11-17 16:08:39,702 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 16:08:39,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834770890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:39,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:39,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-11-17 16:08:39,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548328311] [2023-11-17 16:08:39,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:39,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:08:39,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:39,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:08:39,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:08:39,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 589 [2023-11-17 16:08:39,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 143 flow. Second operand has 17 states, 17 states have (on average 169.47058823529412) internal successors, (2881), 17 states have internal predecessors, (2881), 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 16:08:39,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:39,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 589 [2023-11-17 16:08:39,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:41,443 INFO L124 PetriNetUnfolderBase]: 1032/1711 cut-off events. [2023-11-17 16:08:41,443 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-11-17 16:08:41,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4266 conditions, 1711 events. 1032/1711 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8047 event pairs, 320 based on Foata normal form. 3/1710 useless extension candidates. Maximal degree in co-relation 2381. Up to 443 conditions per place. [2023-11-17 16:08:41,452 INFO L140 encePairwiseOnDemand]: 578/589 looper letters, 121 selfloop transitions, 40 changer transitions 43/204 dead transitions. [2023-11-17 16:08:41,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 204 transitions, 1102 flow [2023-11-17 16:08:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:08:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:08:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2846 transitions. [2023-11-17 16:08:41,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30199490662139217 [2023-11-17 16:08:41,462 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2846 transitions. [2023-11-17 16:08:41,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2846 transitions. [2023-11-17 16:08:41,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:41,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2846 transitions. [2023-11-17 16:08:41,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 177.875) internal successors, (2846), 16 states have internal predecessors, (2846), 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 16:08:41,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 589.0) internal successors, (10013), 17 states have internal predecessors, (10013), 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 16:08:41,485 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 589.0) internal successors, (10013), 17 states have internal predecessors, (10013), 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 16:08:41,486 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 143 flow. Second operand 16 states and 2846 transitions. [2023-11-17 16:08:41,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 204 transitions, 1102 flow [2023-11-17 16:08:41,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 204 transitions, 1092 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:41,492 INFO L231 Difference]: Finished difference. Result has 56 places, 72 transitions, 476 flow [2023-11-17 16:08:41,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=476, PETRI_PLACES=56, PETRI_TRANSITIONS=72} [2023-11-17 16:08:41,495 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-11-17 16:08:41,495 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 72 transitions, 476 flow [2023-11-17 16:08:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 169.47058823529412) internal successors, (2881), 17 states have internal predecessors, (2881), 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 16:08:41,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:41,496 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] [2023-11-17 16:08:41,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:41,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 16:08:41,704 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 1 more)] === [2023-11-17 16:08:41,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1052451832, now seen corresponding path program 2 times [2023-11-17 16:08:41,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957782082] [2023-11-17 16:08:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:42,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957782082] [2023-11-17 16:08:42,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957782082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:42,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533580758] [2023-11-17 16:08:42,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:42,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:42,031 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 16:08:42,049 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 16:08:42,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:42,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:42,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:08:42,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:42,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:42,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:42,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 230 [2023-11-17 16:08:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:42,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533580758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:42,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:42,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 16:08:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751459455] [2023-11-17 16:08:42,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:42,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:08:42,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:08:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:08:42,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 589 [2023-11-17 16:08:42,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 72 transitions, 476 flow. Second operand has 12 states, 12 states have (on average 193.58333333333334) internal successors, (2323), 12 states have internal predecessors, (2323), 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 16:08:42,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:42,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 589 [2023-11-17 16:08:42,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:43,931 INFO L124 PetriNetUnfolderBase]: 2462/4217 cut-off events. [2023-11-17 16:08:43,931 INFO L125 PetriNetUnfolderBase]: For 3441/3441 co-relation queries the response was YES. [2023-11-17 16:08:43,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11570 conditions, 4217 events. 2462/4217 cut-off events. For 3441/3441 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25304 event pairs, 1030 based on Foata normal form. 252/4460 useless extension candidates. Maximal degree in co-relation 10091. Up to 1027 conditions per place. [2023-11-17 16:08:43,952 INFO L140 encePairwiseOnDemand]: 579/589 looper letters, 136 selfloop transitions, 49 changer transitions 21/206 dead transitions. [2023-11-17 16:08:43,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 206 transitions, 1552 flow [2023-11-17 16:08:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:08:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:08:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2598 transitions. [2023-11-17 16:08:43,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392973749510252 [2023-11-17 16:08:43,960 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2598 transitions. [2023-11-17 16:08:43,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2598 transitions. [2023-11-17 16:08:43,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:43,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2598 transitions. [2023-11-17 16:08:43,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 199.84615384615384) internal successors, (2598), 13 states have internal predecessors, (2598), 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 16:08:43,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 589.0) internal successors, (8246), 14 states have internal predecessors, (8246), 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 16:08:43,981 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 589.0) internal successors, (8246), 14 states have internal predecessors, (8246), 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 16:08:43,981 INFO L175 Difference]: Start difference. First operand has 56 places, 72 transitions, 476 flow. Second operand 13 states and 2598 transitions. [2023-11-17 16:08:43,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 206 transitions, 1552 flow [2023-11-17 16:08:43,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 206 transitions, 1456 flow, removed 47 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:43,995 INFO L231 Difference]: Finished difference. Result has 73 places, 102 transitions, 833 flow [2023-11-17 16:08:43,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=833, PETRI_PLACES=73, PETRI_TRANSITIONS=102} [2023-11-17 16:08:43,996 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2023-11-17 16:08:43,996 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 102 transitions, 833 flow [2023-11-17 16:08:43,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 193.58333333333334) internal successors, (2323), 12 states have internal predecessors, (2323), 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 16:08:43,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:43,997 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] [2023-11-17 16:08:44,004 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 16:08:44,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:44,204 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 1 more)] === [2023-11-17 16:08:44,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1056593593, now seen corresponding path program 1 times [2023-11-17 16:08:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:44,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048017424] [2023-11-17 16:08:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:44,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:44,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048017424] [2023-11-17 16:08:44,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048017424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:44,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356028911] [2023-11-17 16:08:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:44,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:44,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:44,486 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 16:08:44,509 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 16:08:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:44,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 16:08:44,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:44,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:08:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356028911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:44,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:08:44,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-17 16:08:44,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178200210] [2023-11-17 16:08:44,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:44,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:44,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:08:44,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 589 [2023-11-17 16:08:44,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 102 transitions, 833 flow. Second operand has 5 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 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 16:08:44,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:44,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 589 [2023-11-17 16:08:44,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:45,920 INFO L124 PetriNetUnfolderBase]: 3486/6002 cut-off events. [2023-11-17 16:08:45,920 INFO L125 PetriNetUnfolderBase]: For 9719/9719 co-relation queries the response was YES. [2023-11-17 16:08:45,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17186 conditions, 6002 events. 3486/6002 cut-off events. For 9719/9719 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39320 event pairs, 2656 based on Foata normal form. 192/6185 useless extension candidates. Maximal degree in co-relation 15948. Up to 2828 conditions per place. [2023-11-17 16:08:45,960 INFO L140 encePairwiseOnDemand]: 581/589 looper letters, 113 selfloop transitions, 34 changer transitions 0/147 dead transitions. [2023-11-17 16:08:45,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 147 transitions, 1387 flow [2023-11-17 16:08:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:08:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:08:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1327 transitions. [2023-11-17 16:08:45,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754951895868704 [2023-11-17 16:08:45,965 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1327 transitions. [2023-11-17 16:08:45,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1327 transitions. [2023-11-17 16:08:45,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:45,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1327 transitions. [2023-11-17 16:08:45,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 221.16666666666666) internal successors, (1327), 6 states have internal predecessors, (1327), 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 16:08:45,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 589.0) internal successors, (4123), 7 states have internal predecessors, (4123), 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 16:08:45,973 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 589.0) internal successors, (4123), 7 states have internal predecessors, (4123), 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 16:08:45,973 INFO L175 Difference]: Start difference. First operand has 73 places, 102 transitions, 833 flow. Second operand 6 states and 1327 transitions. [2023-11-17 16:08:45,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 147 transitions, 1387 flow [2023-11-17 16:08:46,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 147 transitions, 1363 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:46,014 INFO L231 Difference]: Finished difference. Result has 76 places, 102 transitions, 877 flow [2023-11-17 16:08:46,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=877, PETRI_PLACES=76, PETRI_TRANSITIONS=102} [2023-11-17 16:08:46,016 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2023-11-17 16:08:46,017 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 102 transitions, 877 flow [2023-11-17 16:08:46,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 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 16:08:46,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:46,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:46,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:46,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:46,223 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:08:46,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash -859792689, now seen corresponding path program 3 times [2023-11-17 16:08:46,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:46,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919486879] [2023-11-17 16:08:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:46,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:08:46,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:46,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919486879] [2023-11-17 16:08:46,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919486879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:46,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288423344] [2023-11-17 16:08:46,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:08:46,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:46,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:46,716 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 16:08:46,736 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 16:08:46,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:08:46,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:46,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:08:46,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:08:46,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:47,596 INFO L349 Elim1Store]: treesize reduction 38, result has 77.5 percent of original size [2023-11-17 16:08:47,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 460 treesize of output 526 [2023-11-17 16:08:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:08:48,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288423344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:48,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:48,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-11-17 16:08:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305032583] [2023-11-17 16:08:48,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:08:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:08:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:48,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 589 [2023-11-17 16:08:48,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 102 transitions, 877 flow. Second operand has 14 states, 14 states have (on average 175.78571428571428) internal successors, (2461), 14 states have internal predecessors, (2461), 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 16:08:48,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:48,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 589 [2023-11-17 16:08:48,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:49,897 INFO L124 PetriNetUnfolderBase]: 3686/6324 cut-off events. [2023-11-17 16:08:49,897 INFO L125 PetriNetUnfolderBase]: For 10325/10325 co-relation queries the response was YES. [2023-11-17 16:08:49,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18803 conditions, 6324 events. 3686/6324 cut-off events. For 10325/10325 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 41040 event pairs, 870 based on Foata normal form. 88/6403 useless extension candidates. Maximal degree in co-relation 16724. Up to 1257 conditions per place. [2023-11-17 16:08:49,944 INFO L140 encePairwiseOnDemand]: 580/589 looper letters, 149 selfloop transitions, 54 changer transitions 45/248 dead transitions. [2023-11-17 16:08:49,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 248 transitions, 2034 flow [2023-11-17 16:08:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:08:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:08:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3088 transitions. [2023-11-17 16:08:49,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3083990811944472 [2023-11-17 16:08:49,954 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3088 transitions. [2023-11-17 16:08:49,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3088 transitions. [2023-11-17 16:08:49,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:49,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3088 transitions. [2023-11-17 16:08:49,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 181.64705882352942) internal successors, (3088), 17 states have internal predecessors, (3088), 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 16:08:49,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 589.0) internal successors, (10602), 18 states have internal predecessors, (10602), 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 16:08:49,975 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 589.0) internal successors, (10602), 18 states have internal predecessors, (10602), 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 16:08:49,976 INFO L175 Difference]: Start difference. First operand has 76 places, 102 transitions, 877 flow. Second operand 17 states and 3088 transitions. [2023-11-17 16:08:49,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 248 transitions, 2034 flow [2023-11-17 16:08:50,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 248 transitions, 1982 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:08:50,042 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 1086 flow [2023-11-17 16:08:50,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1086, PETRI_PLACES=92, PETRI_TRANSITIONS=112} [2023-11-17 16:08:50,043 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2023-11-17 16:08:50,043 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 1086 flow [2023-11-17 16:08:50,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 175.78571428571428) internal successors, (2461), 14 states have internal predecessors, (2461), 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 16:08:50,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:50,044 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] [2023-11-17 16:08:50,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:50,250 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:08:50,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:50,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1535744847, now seen corresponding path program 1 times [2023-11-17 16:08:50,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:50,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503856090] [2023-11-17 16:08:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:50,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:50,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503856090] [2023-11-17 16:08:50,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503856090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322517480] [2023-11-17 16:08:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:50,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:50,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:50,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:50,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:08:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:50,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:08:50,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:50,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:51,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:51,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 409 treesize of output 456 [2023-11-17 16:08:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:08:52,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322517480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:52,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:52,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-17 16:08:52,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606082989] [2023-11-17 16:08:52,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:52,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:08:52,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:08:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:08:52,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 589 [2023-11-17 16:08:52,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 112 transitions, 1086 flow. Second operand has 10 states, 10 states have (on average 222.6) internal successors, (2226), 10 states have internal predecessors, (2226), 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 16:08:52,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:52,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 589 [2023-11-17 16:08:52,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:52,977 INFO L124 PetriNetUnfolderBase]: 3186/5562 cut-off events. [2023-11-17 16:08:52,978 INFO L125 PetriNetUnfolderBase]: For 13086/13086 co-relation queries the response was YES. [2023-11-17 16:08:52,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17077 conditions, 5562 events. 3186/5562 cut-off events. For 13086/13086 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 35565 event pairs, 1620 based on Foata normal form. 120/5673 useless extension candidates. Maximal degree in co-relation 16815. Up to 2844 conditions per place. [2023-11-17 16:08:53,018 INFO L140 encePairwiseOnDemand]: 586/589 looper letters, 110 selfloop transitions, 15 changer transitions 6/131 dead transitions. [2023-11-17 16:08:53,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 1430 flow [2023-11-17 16:08:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:08:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:08:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 917 transitions. [2023-11-17 16:08:53,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892190152801358 [2023-11-17 16:08:53,021 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 917 transitions. [2023-11-17 16:08:53,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 917 transitions. [2023-11-17 16:08:53,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:53,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 917 transitions. [2023-11-17 16:08:53,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 229.25) internal successors, (917), 4 states have internal predecessors, (917), 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 16:08:53,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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 16:08:53,026 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 589.0) internal successors, (2945), 5 states have internal predecessors, (2945), 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 16:08:53,026 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 1086 flow. Second operand 4 states and 917 transitions. [2023-11-17 16:08:53,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 1430 flow [2023-11-17 16:08:53,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1298 flow, removed 29 selfloop flow, removed 9 redundant places. [2023-11-17 16:08:53,096 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 956 flow [2023-11-17 16:08:53,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=956, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2023-11-17 16:08:53,097 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2023-11-17 16:08:53,097 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 956 flow [2023-11-17 16:08:53,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 222.6) internal successors, (2226), 10 states have internal predecessors, (2226), 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 16:08:53,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:53,098 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 16:08:53,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:53,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:53,305 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:08:53,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:53,306 INFO L85 PathProgramCache]: Analyzing trace with hash 684381299, now seen corresponding path program 1 times [2023-11-17 16:08:53,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:53,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048072962] [2023-11-17 16:08:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:53,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:08:54,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048072962] [2023-11-17 16:08:54,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048072962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:54,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496623384] [2023-11-17 16:08:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:54,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:54,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:54,576 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:54,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:08:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:54,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:08:54,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:08:55,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:57,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:57,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 362 treesize of output 568 [2023-11-17 16:09:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:01,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496623384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:01,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:01,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 16:09:01,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956662645] [2023-11-17 16:09:01,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:01,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:09:01,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:09:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:09:01,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 589 [2023-11-17 16:09:01,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 956 flow. Second operand has 20 states, 20 states have (on average 168.05) internal successors, (3361), 20 states have internal predecessors, (3361), 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 16:09:01,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:01,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 589 [2023-11-17 16:09:01,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:03,950 INFO L124 PetriNetUnfolderBase]: 3928/6800 cut-off events. [2023-11-17 16:09:03,950 INFO L125 PetriNetUnfolderBase]: For 14791/14791 co-relation queries the response was YES. [2023-11-17 16:09:03,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21381 conditions, 6800 events. 3928/6800 cut-off events. For 14791/14791 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 45098 event pairs, 944 based on Foata normal form. 67/6858 useless extension candidates. Maximal degree in co-relation 18104. Up to 2103 conditions per place. [2023-11-17 16:09:03,981 INFO L140 encePairwiseOnDemand]: 578/589 looper letters, 168 selfloop transitions, 77 changer transitions 75/320 dead transitions. [2023-11-17 16:09:03,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 320 transitions, 2576 flow [2023-11-17 16:09:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:09:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:09:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4364 transitions. [2023-11-17 16:09:03,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2963667232597623 [2023-11-17 16:09:03,992 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4364 transitions. [2023-11-17 16:09:03,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4364 transitions. [2023-11-17 16:09:03,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:03,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4364 transitions. [2023-11-17 16:09:04,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 174.56) internal successors, (4364), 25 states have internal predecessors, (4364), 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 16:09:04,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 589.0) internal successors, (15314), 26 states have internal predecessors, (15314), 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 16:09:04,020 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 589.0) internal successors, (15314), 26 states have internal predecessors, (15314), 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 16:09:04,020 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 956 flow. Second operand 25 states and 4364 transitions. [2023-11-17 16:09:04,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 320 transitions, 2576 flow [2023-11-17 16:09:04,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 320 transitions, 2538 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 16:09:04,153 INFO L231 Difference]: Finished difference. Result has 119 places, 140 transitions, 1644 flow [2023-11-17 16:09:04,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1644, PETRI_PLACES=119, PETRI_TRANSITIONS=140} [2023-11-17 16:09:04,153 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2023-11-17 16:09:04,154 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 140 transitions, 1644 flow [2023-11-17 16:09:04,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 168.05) internal successors, (3361), 20 states have internal predecessors, (3361), 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 16:09:04,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:04,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:04,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:04,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:04,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:04,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash -859001044, now seen corresponding path program 1 times [2023-11-17 16:09:04,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:04,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396557403] [2023-11-17 16:09:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:04,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:09:04,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:04,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396557403] [2023-11-17 16:09:04,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396557403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:04,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650688979] [2023-11-17 16:09:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:04,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:04,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:04,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:04,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:09:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:04,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:09:04,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:09:05,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:05,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:05,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 356 treesize of output 471 [2023-11-17 16:09:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:09:07,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650688979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:07,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:07,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 16:09:07,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274928036] [2023-11-17 16:09:07,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:07,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:09:07,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:09:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:09:07,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 589 [2023-11-17 16:09:07,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 140 transitions, 1644 flow. Second operand has 12 states, 12 states have (on average 214.41666666666666) internal successors, (2573), 12 states have internal predecessors, (2573), 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 16:09:07,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:07,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 589 [2023-11-17 16:09:07,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:08,480 INFO L124 PetriNetUnfolderBase]: 2433/4415 cut-off events. [2023-11-17 16:09:08,480 INFO L125 PetriNetUnfolderBase]: For 14682/14682 co-relation queries the response was YES. [2023-11-17 16:09:08,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13832 conditions, 4415 events. 2433/4415 cut-off events. For 14682/14682 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 28488 event pairs, 651 based on Foata normal form. 196/4602 useless extension candidates. Maximal degree in co-relation 13797. Up to 1391 conditions per place. [2023-11-17 16:09:08,497 INFO L140 encePairwiseOnDemand]: 585/589 looper letters, 89 selfloop transitions, 38 changer transitions 17/144 dead transitions. [2023-11-17 16:09:08,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1483 flow [2023-11-17 16:09:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:09:08,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:09:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1553 transitions. [2023-11-17 16:09:08,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3766674751394616 [2023-11-17 16:09:08,500 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1553 transitions. [2023-11-17 16:09:08,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1553 transitions. [2023-11-17 16:09:08,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:08,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1553 transitions. [2023-11-17 16:09:08,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 221.85714285714286) internal successors, (1553), 7 states have internal predecessors, (1553), 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 16:09:08,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 589.0) internal successors, (4712), 8 states have internal predecessors, (4712), 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 16:09:08,507 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 589.0) internal successors, (4712), 8 states have internal predecessors, (4712), 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 16:09:08,507 INFO L175 Difference]: Start difference. First operand has 119 places, 140 transitions, 1644 flow. Second operand 7 states and 1553 transitions. [2023-11-17 16:09:08,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1483 flow [2023-11-17 16:09:08,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 1263 flow, removed 32 selfloop flow, removed 18 redundant places. [2023-11-17 16:09:08,569 INFO L231 Difference]: Finished difference. Result has 100 places, 91 transitions, 859 flow [2023-11-17 16:09:08,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=859, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2023-11-17 16:09:08,569 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 71 predicate places. [2023-11-17 16:09:08,570 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 859 flow [2023-11-17 16:09:08,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 214.41666666666666) internal successors, (2573), 12 states have internal predecessors, (2573), 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 16:09:08,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:08,570 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] [2023-11-17 16:09:08,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 16:09:08,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-17 16:09:08,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:09:08,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1224747179, now seen corresponding path program 2 times [2023-11-17 16:09:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:08,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996313395] [2023-11-17 16:09:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:08,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:09:09,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:09,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996313395] [2023-11-17 16:09:09,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996313395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:09,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957388436] [2023-11-17 16:09:09,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:09:09,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:09,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:09,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:09,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:09:10,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:09:10,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:10,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:09:10,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:09:10,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:12,870 INFO L349 Elim1Store]: treesize reduction 122, result has 73.2 percent of original size [2023-11-17 16:09:12,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 831 treesize of output 1004 [2023-11-17 16:09:24,825 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:09:28,335 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:09:41,255 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:09:45,905 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:10:00,294 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:10:01,429 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:10:07,460 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:10:09,507 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:10:13,611 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:10:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:10:20,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957388436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:20,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:20,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-11-17 16:10:20,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105917137] [2023-11-17 16:10:20,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:20,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:10:20,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:10:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:10:20,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 589 [2023-11-17 16:10:20,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 859 flow. Second operand has 26 states, 26 states have (on average 154.8846153846154) internal successors, (4027), 26 states have internal predecessors, (4027), 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 16:10:20,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:20,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 589 [2023-11-17 16:10:20,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:22,259 INFO L124 PetriNetUnfolderBase]: 4131/7355 cut-off events. [2023-11-17 16:10:22,259 INFO L125 PetriNetUnfolderBase]: For 16221/16221 co-relation queries the response was YES. [2023-11-17 16:10:22,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23433 conditions, 7355 events. 4131/7355 cut-off events. For 16221/16221 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 51235 event pairs, 970 based on Foata normal form. 12/7342 useless extension candidates. Maximal degree in co-relation 23404. Up to 1372 conditions per place. [2023-11-17 16:10:22,292 INFO L140 encePairwiseOnDemand]: 579/589 looper letters, 162 selfloop transitions, 109 changer transitions 64/335 dead transitions. [2023-11-17 16:10:22,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 335 transitions, 2804 flow [2023-11-17 16:10:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:10:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:10:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4667 transitions. [2023-11-17 16:10:22,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27322756278906385 [2023-11-17 16:10:22,299 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4667 transitions. [2023-11-17 16:10:22,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4667 transitions. [2023-11-17 16:10:22,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:22,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4667 transitions. [2023-11-17 16:10:22,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 160.93103448275863) internal successors, (4667), 29 states have internal predecessors, (4667), 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 16:10:22,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 589.0) internal successors, (17670), 30 states have internal predecessors, (17670), 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 16:10:22,320 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 589.0) internal successors, (17670), 30 states have internal predecessors, (17670), 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 16:10:22,320 INFO L175 Difference]: Start difference. First operand has 100 places, 91 transitions, 859 flow. Second operand 29 states and 4667 transitions. [2023-11-17 16:10:22,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 335 transitions, 2804 flow [2023-11-17 16:10:22,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 335 transitions, 2639 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-11-17 16:10:22,429 INFO L231 Difference]: Finished difference. Result has 128 places, 151 transitions, 1762 flow [2023-11-17 16:10:22,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1762, PETRI_PLACES=128, PETRI_TRANSITIONS=151} [2023-11-17 16:10:22,431 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2023-11-17 16:10:22,431 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 151 transitions, 1762 flow [2023-11-17 16:10:22,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 154.8846153846154) internal successors, (4027), 26 states have internal predecessors, (4027), 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 16:10:22,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:22,432 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 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 16:10:22,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:10:22,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 16:10:22,647 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:10:22,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:22,647 INFO L85 PathProgramCache]: Analyzing trace with hash 480089904, now seen corresponding path program 2 times [2023-11-17 16:10:22,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:22,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345969552] [2023-11-17 16:10:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:22,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:10:24,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:24,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345969552] [2023-11-17 16:10:24,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345969552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:24,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085194269] [2023-11-17 16:10:24,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:10:24,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:24,357 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:10:24,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:10:24,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:10:24,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:10:24,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:10:24,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:10:24,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:25,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:25,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 314 treesize of output 429 [2023-11-17 16:10:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-17 16:10:28,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085194269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:10:28,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:10:28,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 21 [2023-11-17 16:10:28,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385015515] [2023-11-17 16:10:28,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:10:28,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:10:28,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:10:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:10:28,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:10:28,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 589 [2023-11-17 16:10:28,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 151 transitions, 1762 flow. Second operand has 23 states, 23 states have (on average 166.2608695652174) internal successors, (3824), 23 states have internal predecessors, (3824), 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 16:10:28,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:10:28,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 589 [2023-11-17 16:10:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:30,626 INFO L124 PetriNetUnfolderBase]: 4551/8102 cut-off events. [2023-11-17 16:10:30,627 INFO L125 PetriNetUnfolderBase]: For 18952/18952 co-relation queries the response was YES. [2023-11-17 16:10:30,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26454 conditions, 8102 events. 4551/8102 cut-off events. For 18952/18952 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 57581 event pairs, 1264 based on Foata normal form. 10/8074 useless extension candidates. Maximal degree in co-relation 26420. Up to 1933 conditions per place. [2023-11-17 16:10:30,655 INFO L140 encePairwiseOnDemand]: 578/589 looper letters, 76 selfloop transitions, 131 changer transitions 66/273 dead transitions. [2023-11-17 16:10:30,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 273 transitions, 2921 flow [2023-11-17 16:10:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:10:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:10:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4728 transitions. [2023-11-17 16:10:30,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28668445306815427 [2023-11-17 16:10:30,666 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4728 transitions. [2023-11-17 16:10:30,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4728 transitions. [2023-11-17 16:10:30,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:30,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4728 transitions. [2023-11-17 16:10:30,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 168.85714285714286) internal successors, (4728), 28 states have internal predecessors, (4728), 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 16:10:30,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 589.0) internal successors, (17081), 29 states have internal predecessors, (17081), 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 16:10:30,685 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 589.0) internal successors, (17081), 29 states have internal predecessors, (17081), 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 16:10:30,685 INFO L175 Difference]: Start difference. First operand has 128 places, 151 transitions, 1762 flow. Second operand 28 states and 4728 transitions. [2023-11-17 16:10:30,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 273 transitions, 2921 flow [2023-11-17 16:10:30,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 273 transitions, 2513 flow, removed 170 selfloop flow, removed 6 redundant places. [2023-11-17 16:10:30,818 INFO L231 Difference]: Finished difference. Result has 154 places, 189 transitions, 2038 flow [2023-11-17 16:10:30,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2038, PETRI_PLACES=154, PETRI_TRANSITIONS=189} [2023-11-17 16:10:30,819 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2023-11-17 16:10:30,819 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 189 transitions, 2038 flow [2023-11-17 16:10:30,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 166.2608695652174) internal successors, (3824), 23 states have internal predecessors, (3824), 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 16:10:30,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:30,820 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 16:10:30,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:10:31,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:10:31,026 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:10:31,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1483290386, now seen corresponding path program 1 times [2023-11-17 16:10:31,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:31,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748202491] [2023-11-17 16:10:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:31,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:10:32,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:32,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748202491] [2023-11-17 16:10:32,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748202491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:32,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996957996] [2023-11-17 16:10:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:32,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:32,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:32,140 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:10:32,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:10:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:32,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:10:32,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:10:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:10:32,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:10:36,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:10:36,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 598 treesize of output 1501 [2023-11-17 16:11:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:11:19,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996957996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:19,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:19,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2023-11-17 16:11:19,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754153423] [2023-11-17 16:11:19,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:19,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:11:19,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:11:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:11:19,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 589 [2023-11-17 16:11:19,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 189 transitions, 2038 flow. Second operand has 24 states, 24 states have (on average 162.79166666666666) internal successors, (3907), 24 states have internal predecessors, (3907), 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 16:11:19,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:19,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 589 [2023-11-17 16:11:19,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:22,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:11:23,665 INFO L124 PetriNetUnfolderBase]: 4614/8097 cut-off events. [2023-11-17 16:11:23,666 INFO L125 PetriNetUnfolderBase]: For 21787/21787 co-relation queries the response was YES. [2023-11-17 16:11:23,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26562 conditions, 8097 events. 4614/8097 cut-off events. For 21787/21787 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 56307 event pairs, 924 based on Foata normal form. 112/8196 useless extension candidates. Maximal degree in co-relation 26525. Up to 1513 conditions per place. [2023-11-17 16:11:23,709 INFO L140 encePairwiseOnDemand]: 580/589 looper letters, 196 selfloop transitions, 97 changer transitions 62/355 dead transitions. [2023-11-17 16:11:23,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 355 transitions, 3425 flow [2023-11-17 16:11:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:11:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:11:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3904 transitions. [2023-11-17 16:11:23,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2881818852882557 [2023-11-17 16:11:23,715 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3904 transitions. [2023-11-17 16:11:23,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3904 transitions. [2023-11-17 16:11:23,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:23,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3904 transitions. [2023-11-17 16:11:23,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 169.7391304347826) internal successors, (3904), 23 states have internal predecessors, (3904), 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 16:11:23,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 589.0) internal successors, (14136), 24 states have internal predecessors, (14136), 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 16:11:23,729 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 589.0) internal successors, (14136), 24 states have internal predecessors, (14136), 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 16:11:23,729 INFO L175 Difference]: Start difference. First operand has 154 places, 189 transitions, 2038 flow. Second operand 23 states and 3904 transitions. [2023-11-17 16:11:23,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 355 transitions, 3425 flow [2023-11-17 16:11:23,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 355 transitions, 3002 flow, removed 110 selfloop flow, removed 14 redundant places. [2023-11-17 16:11:23,856 INFO L231 Difference]: Finished difference. Result has 161 places, 190 transitions, 2038 flow [2023-11-17 16:11:23,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2038, PETRI_PLACES=161, PETRI_TRANSITIONS=190} [2023-11-17 16:11:23,858 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 132 predicate places. [2023-11-17 16:11:23,858 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 190 transitions, 2038 flow [2023-11-17 16:11:23,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 162.79166666666666) internal successors, (3907), 24 states have internal predecessors, (3907), 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 16:11:23,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:23,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:23,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 16:11:24,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:11:24,064 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:11:24,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2026187409, now seen corresponding path program 2 times [2023-11-17 16:11:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:24,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575708486] [2023-11-17 16:11:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 16:11:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:24,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575708486] [2023-11-17 16:11:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575708486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:24,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449474192] [2023-11-17 16:11:24,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:11:24,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:24,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:24,448 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:11:24,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:11:24,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:11:24,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:24,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:11:24,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:24,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:25,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:25,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 230 [2023-11-17 16:11:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:25,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449474192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:25,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:25,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-17 16:11:25,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355186753] [2023-11-17 16:11:25,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:25,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:11:25,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:11:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:11:25,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 589 [2023-11-17 16:11:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 190 transitions, 2038 flow. Second operand has 18 states, 18 states have (on average 191.0) internal successors, (3438), 18 states have internal predecessors, (3438), 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 16:11:25,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:25,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 589 [2023-11-17 16:11:25,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:26,836 INFO L124 PetriNetUnfolderBase]: 4510/7993 cut-off events. [2023-11-17 16:11:26,836 INFO L125 PetriNetUnfolderBase]: For 25248/25248 co-relation queries the response was YES. [2023-11-17 16:11:26,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25966 conditions, 7993 events. 4510/7993 cut-off events. For 25248/25248 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55770 event pairs, 1738 based on Foata normal form. 140/8124 useless extension candidates. Maximal degree in co-relation 25931. Up to 2176 conditions per place. [2023-11-17 16:11:26,867 INFO L140 encePairwiseOnDemand]: 580/589 looper letters, 187 selfloop transitions, 68 changer transitions 20/275 dead transitions. [2023-11-17 16:11:26,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 275 transitions, 3090 flow [2023-11-17 16:11:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:11:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:11:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2143 transitions. [2023-11-17 16:11:26,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307609198950455 [2023-11-17 16:11:26,870 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2143 transitions. [2023-11-17 16:11:26,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2143 transitions. [2023-11-17 16:11:26,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:26,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2143 transitions. [2023-11-17 16:11:26,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 194.8181818181818) internal successors, (2143), 11 states have internal predecessors, (2143), 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 16:11:26,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 589.0) internal successors, (7068), 12 states have internal predecessors, (7068), 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 16:11:26,877 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 589.0) internal successors, (7068), 12 states have internal predecessors, (7068), 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 16:11:26,877 INFO L175 Difference]: Start difference. First operand has 161 places, 190 transitions, 2038 flow. Second operand 11 states and 2143 transitions. [2023-11-17 16:11:26,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 275 transitions, 3090 flow [2023-11-17 16:11:26,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 275 transitions, 2747 flow, removed 77 selfloop flow, removed 15 redundant places. [2023-11-17 16:11:26,994 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 1899 flow [2023-11-17 16:11:26,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1899, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2023-11-17 16:11:26,995 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2023-11-17 16:11:26,995 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 1899 flow [2023-11-17 16:11:26,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 191.0) internal successors, (3438), 18 states have internal predecessors, (3438), 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 16:11:26,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:26,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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 16:11:27,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:11:27,196 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:11:27,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash -414668501, now seen corresponding path program 3 times [2023-11-17 16:11:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:27,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254165235] [2023-11-17 16:11:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:27,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 16:11:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:27,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254165235] [2023-11-17 16:11:27,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254165235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:27,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016337145] [2023-11-17 16:11:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:11:27,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:27,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:11:27,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:11:27,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:11:27,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:27,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 16:11:27,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:11:28,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:29,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:29,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 383 treesize of output 582 [2023-11-17 16:11:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:11:34,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016337145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:34,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:34,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 16:11:34,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803404391] [2023-11-17 16:11:34,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:34,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:11:34,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:34,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:11:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:11:34,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 589 [2023-11-17 16:11:34,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 1899 flow. Second operand has 20 states, 20 states have (on average 161.45) internal successors, (3229), 20 states have internal predecessors, (3229), 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 16:11:34,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:34,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 589 [2023-11-17 16:11:34,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:37,631 INFO L124 PetriNetUnfolderBase]: 5316/9365 cut-off events. [2023-11-17 16:11:37,631 INFO L125 PetriNetUnfolderBase]: For 21664/21664 co-relation queries the response was YES. [2023-11-17 16:11:37,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29061 conditions, 9365 events. 5316/9365 cut-off events. For 21664/21664 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 65424 event pairs, 1660 based on Foata normal form. 264/9620 useless extension candidates. Maximal degree in co-relation 29027. Up to 1759 conditions per place. [2023-11-17 16:11:37,671 INFO L140 encePairwiseOnDemand]: 580/589 looper letters, 275 selfloop transitions, 88 changer transitions 101/464 dead transitions. [2023-11-17 16:11:37,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 464 transitions, 3967 flow [2023-11-17 16:11:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:11:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:11:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5859 transitions. [2023-11-17 16:11:37,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28421052631578947 [2023-11-17 16:11:37,678 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5859 transitions. [2023-11-17 16:11:37,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5859 transitions. [2023-11-17 16:11:37,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:37,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5859 transitions. [2023-11-17 16:11:37,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 167.4) internal successors, (5859), 35 states have internal predecessors, (5859), 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 16:11:37,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 589.0) internal successors, (21204), 36 states have internal predecessors, (21204), 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 16:11:37,702 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 589.0) internal successors, (21204), 36 states have internal predecessors, (21204), 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 16:11:37,702 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 1899 flow. Second operand 35 states and 5859 transitions. [2023-11-17 16:11:37,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 464 transitions, 3967 flow [2023-11-17 16:11:37,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 464 transitions, 3827 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-11-17 16:11:37,825 INFO L231 Difference]: Finished difference. Result has 189 places, 190 transitions, 2038 flow [2023-11-17 16:11:37,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2038, PETRI_PLACES=189, PETRI_TRANSITIONS=190} [2023-11-17 16:11:37,825 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 160 predicate places. [2023-11-17 16:11:37,826 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 190 transitions, 2038 flow [2023-11-17 16:11:37,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 161.45) internal successors, (3229), 20 states have internal predecessors, (3229), 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 16:11:37,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:37,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:37,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:38,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 16:11:38,032 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:11:38,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1597549742, now seen corresponding path program 3 times [2023-11-17 16:11:38,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:38,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814643918] [2023-11-17 16:11:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:38,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:38,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:38,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814643918] [2023-11-17 16:11:38,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814643918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691023260] [2023-11-17 16:11:38,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:11:38,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:38,516 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:11:38,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:11:38,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:11:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:38,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:11:38,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:39,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:40,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:11:40,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 450 treesize of output 831 [2023-11-17 16:11:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:11:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691023260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:44,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:44,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-17 16:11:44,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182781360] [2023-11-17 16:11:44,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:44,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 16:11:44,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 16:11:44,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-17 16:11:44,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 589 [2023-11-17 16:11:44,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 190 transitions, 2038 flow. Second operand has 15 states, 15 states have (on average 205.13333333333333) internal successors, (3077), 15 states have internal predecessors, (3077), 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 16:11:44,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:44,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 589 [2023-11-17 16:11:44,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:46,001 INFO L124 PetriNetUnfolderBase]: 4012/7181 cut-off events. [2023-11-17 16:11:46,001 INFO L125 PetriNetUnfolderBase]: For 17247/17247 co-relation queries the response was YES. [2023-11-17 16:11:46,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21931 conditions, 7181 events. 4012/7181 cut-off events. For 17247/17247 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 48830 event pairs, 1084 based on Foata normal form. 140/7312 useless extension candidates. Maximal degree in co-relation 21892. Up to 1730 conditions per place. [2023-11-17 16:11:46,043 INFO L140 encePairwiseOnDemand]: 585/589 looper letters, 131 selfloop transitions, 42 changer transitions 42/215 dead transitions. [2023-11-17 16:11:46,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 215 transitions, 2280 flow [2023-11-17 16:11:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:11:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:11:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1690 transitions. [2023-11-17 16:11:46,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35865874363327677 [2023-11-17 16:11:46,045 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1690 transitions. [2023-11-17 16:11:46,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1690 transitions. [2023-11-17 16:11:46,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:11:46,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1690 transitions. [2023-11-17 16:11:46,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 211.25) internal successors, (1690), 8 states have internal predecessors, (1690), 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 16:11:46,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 589.0) internal successors, (5301), 9 states have internal predecessors, (5301), 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 16:11:46,050 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 589.0) internal successors, (5301), 9 states have internal predecessors, (5301), 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 16:11:46,050 INFO L175 Difference]: Start difference. First operand has 189 places, 190 transitions, 2038 flow. Second operand 8 states and 1690 transitions. [2023-11-17 16:11:46,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 215 transitions, 2280 flow [2023-11-17 16:11:46,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 215 transitions, 2101 flow, removed 16 selfloop flow, removed 24 redundant places. [2023-11-17 16:11:46,104 INFO L231 Difference]: Finished difference. Result has 158 places, 146 transitions, 1431 flow [2023-11-17 16:11:46,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1431, PETRI_PLACES=158, PETRI_TRANSITIONS=146} [2023-11-17 16:11:46,105 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2023-11-17 16:11:46,105 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 146 transitions, 1431 flow [2023-11-17 16:11:46,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 205.13333333333333) internal successors, (3077), 15 states have internal predecessors, (3077), 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 16:11:46,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:11:46,105 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:11:46,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:11:46,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:46,306 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:11:46,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:11:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1024317199, now seen corresponding path program 4 times [2023-11-17 16:11:46,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:11:46,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516725509] [2023-11-17 16:11:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:11:46,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:11:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:11:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:48,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:11:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516725509] [2023-11-17 16:11:48,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516725509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:11:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705747540] [2023-11-17 16:11:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:11:48,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:11:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:11:48,379 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:11:48,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:11:48,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:11:48,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:11:48,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 16:11:48,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:48,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:11:49,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:11:49,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:11:49,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:11:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:11:49,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:21,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:21,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-11-17 16:12:21,366 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2023-11-17 16:12:21,366 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 13046 treesize of output 12037 [2023-11-17 16:12:21,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:21,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1494 treesize of output 1318 [2023-11-17 16:12:21,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:21,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1302 treesize of output 1222 [2023-11-17 16:12:21,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:21,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1206 treesize of output 838 [2023-11-17 16:12:21,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:21,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2023-11-17 16:12:22,073 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2023-11-17 16:12:22,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108932 treesize of output 100806 [2023-11-17 16:12:22,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:22,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:22,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1642 treesize of output 1614 [2023-11-17 16:12:22,292 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:22,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:22,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1628 treesize of output 1276 [2023-11-17 16:12:22,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:22,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:22,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1149 treesize of output 1013 [2023-11-17 16:12:52,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:52,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2023-11-17 16:12:53,047 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2023-11-17 16:12:53,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4188 treesize of output 3966 [2023-11-17 16:12:53,192 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:53,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:53,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1642 treesize of output 1614 [2023-11-17 16:12:53,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:53,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:53,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1628 treesize of output 1276 [2023-11-17 16:12:53,359 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:53,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:53,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1149 treesize of output 1013 [2023-11-17 16:12:56,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:56,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 127 [2023-11-17 16:12:57,000 INFO L349 Elim1Store]: treesize reduction 9, result has 94.5 percent of original size [2023-11-17 16:12:57,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 28026 treesize of output 26036 [2023-11-17 16:12:57,278 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:57,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:57,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 3350 treesize of output 3057 [2023-11-17 16:12:57,398 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:57,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:57,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 2855 treesize of output 2774 [2023-11-17 16:12:57,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:12:57,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:12:57,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 2714 treesize of output 1997 [2023-11-17 16:13:20,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-11-17 16:13:20,332 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-17 16:13:20,333 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-17 16:13:20,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:20,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:20,535 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2023-11-17 16:13:20,538 INFO L158 Benchmark]: Toolchain (without parser) took 303104.80ms. Allocated memory was 254.8MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 203.4MB in the beginning and 737.4MB in the end (delta: -534.0MB). Peak memory consumption was 825.9MB. Max. memory is 8.0GB. [2023-11-17 16:13:20,538 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 187.7MB. Free memory is still 134.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:13:20,538 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.82ms. Allocated memory is still 254.8MB. Free memory was 203.4MB in the beginning and 190.3MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 16:13:20,538 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.10ms. Allocated memory is still 254.8MB. Free memory was 190.3MB in the beginning and 187.7MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 16:13:20,539 INFO L158 Benchmark]: Boogie Preprocessor took 50.91ms. Allocated memory is still 254.8MB. Free memory was 187.7MB in the beginning and 185.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:13:20,539 INFO L158 Benchmark]: RCFGBuilder took 779.76ms. Allocated memory is still 254.8MB. Free memory was 185.1MB in the beginning and 198.7MB in the end (delta: -13.6MB). Peak memory consumption was 37.3MB. Max. memory is 8.0GB. [2023-11-17 16:13:20,539 INFO L158 Benchmark]: TraceAbstraction took 301939.50ms. Allocated memory was 254.8MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 198.1MB in the beginning and 737.4MB in the end (delta: -539.3MB). Peak memory consumption was 820.1MB. Max. memory is 8.0GB. [2023-11-17 16:13:20,540 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 187.7MB. Free memory is still 134.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 275.82ms. Allocated memory is still 254.8MB. Free memory was 203.4MB in the beginning and 190.3MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.10ms. Allocated memory is still 254.8MB. Free memory was 190.3MB in the beginning and 187.7MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.91ms. Allocated memory is still 254.8MB. Free memory was 187.7MB in the beginning and 185.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 779.76ms. Allocated memory is still 254.8MB. Free memory was 185.1MB in the beginning and 198.7MB in the end (delta: -13.6MB). Peak memory consumption was 37.3MB. Max. memory is 8.0GB. * TraceAbstraction took 301939.50ms. Allocated memory was 254.8MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 198.1MB in the beginning and 737.4MB in the end (delta: -539.3MB). Peak memory consumption was 820.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.7s, 255 PlacesBefore, 29 PlacesAfterwards, 272 TransitionsBefore, 25 TransitionsAfterwards, 2700 CoEnabledTransitionPairs, 8 FixpointIterations, 186 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 33 TrivialYvCompositions, 12 ConcurrentYvCompositions, 21 ChoiceCompositions, 303 TotalNumberOfCompositions, 2578 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2554, independent: 2542, independent conditional: 0, independent unconditional: 2542, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1836, independent: 1832, independent conditional: 0, independent unconditional: 1832, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1836, independent: 1832, independent conditional: 0, independent unconditional: 1832, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 36, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2554, independent: 710, independent conditional: 0, independent unconditional: 710, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 1836, unknown conditional: 0, unknown unconditional: 1836] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 43, Positive conditional cache size: 0, Positive unconditional cache size: 43, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...