/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:20:37,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:20:37,430 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 12:20:37,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:20:37,464 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:20:37,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:20:37,465 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:20:37,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:20:37,466 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:20:37,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:20:37,470 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:20:37,471 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:20:37,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:20:37,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:20:37,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:20:37,472 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:20:37,472 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:20:37,473 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:20:37,473 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:20:37,473 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:20:37,473 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:20:37,474 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:20:37,474 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:20:37,474 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:20:37,475 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:20:37,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:20:37,475 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:20:37,475 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:20:37,476 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:20:37,476 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:20:37,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:20:37,477 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:20:37,477 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:20:37,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:20:37,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:20:37,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:20:37,765 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:20:37,765 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:20:37,767 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-11-17 12:20:38,989 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:20:39,215 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:20:39,216 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-11-17 12:20:39,226 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff3aec7b/a23a3d0ed5224a9297fe496067e86861/FLAG6fccadbbd [2023-11-17 12:20:39,245 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff3aec7b/a23a3d0ed5224a9297fe496067e86861 [2023-11-17 12:20:39,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:20:39,249 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:20:39,252 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:20:39,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:20:39,256 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:20:39,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34aad87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39, skipping insertion in model container [2023-11-17 12:20:39,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,297 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:20:39,446 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-more-buffer-mult.wvr.c[4270,4283] [2023-11-17 12:20:39,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:20:39,464 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:20:39,489 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-more-buffer-mult.wvr.c[4270,4283] [2023-11-17 12:20:39,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:20:39,500 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:20:39,501 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:20:39,507 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:20:39,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39 WrapperNode [2023-11-17 12:20:39,508 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:20:39,509 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:20:39,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:20:39,510 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:20:39,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,524 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,557 INFO L138 Inliner]: procedures = 27, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 320 [2023-11-17 12:20:39,558 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:20:39,558 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:20:39,559 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:20:39,559 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:20:39,567 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,599 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,603 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:20:39,608 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:20:39,608 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:20:39,608 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:20:39,613 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (1/1) ... [2023-11-17 12:20:39,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:20:39,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:39,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 12:20:39,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 12:20:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:20:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:20:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:20:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:20:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:20:39,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:20:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:20:39,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:20:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:20:39,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:20:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 12:20:39,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 12:20:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:20:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:20:39,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:20:39,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:20:39,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:20:39,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:20:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:20:39,691 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:20:39,841 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:20:39,843 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:20:40,235 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:20:40,608 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:20:40,608 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 12:20:40,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:20:40 BoogieIcfgContainer [2023-11-17 12:20:40,610 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:20:40,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:20:40,612 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:20:40,615 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:20:40,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:20:39" (1/3) ... [2023-11-17 12:20:40,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d45ffcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:20:40, skipping insertion in model container [2023-11-17 12:20:40,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:20:39" (2/3) ... [2023-11-17 12:20:40,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d45ffcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:20:40, skipping insertion in model container [2023-11-17 12:20:40,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:20:40" (3/3) ... [2023-11-17 12:20:40,619 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2023-11-17 12:20:40,636 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:20:40,636 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:20:40,637 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:20:40,703 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 12:20:40,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 53 transitions, 134 flow [2023-11-17 12:20:40,803 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2023-11-17 12:20:40,803 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:20:40,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 49 events. 6/49 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-17 12:20:40,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 53 transitions, 134 flow [2023-11-17 12:20:40,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 48 transitions, 120 flow [2023-11-17 12:20:40,818 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:20:40,834 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 48 transitions, 120 flow [2023-11-17 12:20:40,838 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 48 transitions, 120 flow [2023-11-17 12:20:40,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 120 flow [2023-11-17 12:20:40,861 INFO L124 PetriNetUnfolderBase]: 6/48 cut-off events. [2023-11-17 12:20:40,862 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:20:40,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 48 events. 6/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-17 12:20:40,864 INFO L119 LiptonReduction]: Number of co-enabled transitions 870 [2023-11-17 12:20:41,582 INFO L134 LiptonReduction]: Checked pairs total: 989 [2023-11-17 12:20:41,582 INFO L136 LiptonReduction]: Total number of compositions: 11 [2023-11-17 12:20:41,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:20:41,606 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;@25eaafe8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:20:41,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 12:20:41,623 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:20:41,624 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-17 12:20:41,624 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:20:41,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:41,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:41,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:20:41,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1428541897, now seen corresponding path program 1 times [2023-11-17 12:20:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:41,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506351993] [2023-11-17 12:20:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:41,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:42,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:42,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506351993] [2023-11-17 12:20:42,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506351993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:20:42,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:20:42,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:20:42,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101102531] [2023-11-17 12:20:42,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:20:42,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:20:42,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:20:42,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:20:42,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2023-11-17 12:20:42,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:42,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:42,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2023-11-17 12:20:42,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:42,753 INFO L124 PetriNetUnfolderBase]: 3411/4671 cut-off events. [2023-11-17 12:20:42,753 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2023-11-17 12:20:42,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9331 conditions, 4671 events. 3411/4671 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19531 event pairs, 1113 based on Foata normal form. 1/3556 useless extension candidates. Maximal degree in co-relation 7592. Up to 2477 conditions per place. [2023-11-17 12:20:42,792 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 55 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-11-17 12:20:42,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 279 flow [2023-11-17 12:20:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:20:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:20:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-11-17 12:20:42,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2023-11-17 12:20:42,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-11-17 12:20:42,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-11-17 12:20:42,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:42,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-11-17 12:20:42,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:42,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:42,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:42,816 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 3 states and 123 transitions. [2023-11-17 12:20:42,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 279 flow [2023-11-17 12:20:42,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 61 transitions, 253 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 12:20:42,828 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 101 flow [2023-11-17 12:20:42,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-11-17 12:20:42,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-11-17 12:20:42,833 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 101 flow [2023-11-17 12:20:42,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:42,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:42,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:42,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:20:42,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:20:42,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1053832583, now seen corresponding path program 1 times [2023-11-17 12:20:42,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:42,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100531457] [2023-11-17 12:20:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:42,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100531457] [2023-11-17 12:20:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100531457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:20:42,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:20:42,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:20:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547511863] [2023-11-17 12:20:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:20:42,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:20:42,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:20:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:20:43,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2023-11-17 12:20:43,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:43,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:43,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2023-11-17 12:20:43,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:43,611 INFO L124 PetriNetUnfolderBase]: 4905/6578 cut-off events. [2023-11-17 12:20:43,611 INFO L125 PetriNetUnfolderBase]: For 856/856 co-relation queries the response was YES. [2023-11-17 12:20:43,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14346 conditions, 6578 events. 4905/6578 cut-off events. For 856/856 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 27951 event pairs, 1647 based on Foata normal form. 194/6004 useless extension candidates. Maximal degree in co-relation 5989. Up to 4240 conditions per place. [2023-11-17 12:20:43,645 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 63 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-17 12:20:43,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 299 flow [2023-11-17 12:20:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:20:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:20:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2023-11-17 12:20:43,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-17 12:20:43,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2023-11-17 12:20:43,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2023-11-17 12:20:43,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:43,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2023-11-17 12:20:43,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:43,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:43,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:43,649 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 101 flow. Second operand 3 states and 120 transitions. [2023-11-17 12:20:43,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 299 flow [2023-11-17 12:20:43,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:20:43,652 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 112 flow [2023-11-17 12:20:43,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-11-17 12:20:43,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-11-17 12:20:43,653 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 112 flow [2023-11-17 12:20:43,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:43,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:43,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:43,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:20:43,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:20:43,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:43,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1777090405, now seen corresponding path program 1 times [2023-11-17 12:20:43,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:43,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770095336] [2023-11-17 12:20:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:43,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:43,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:43,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770095336] [2023-11-17 12:20:43,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770095336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:20:43,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:20:43,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:20:43,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933408862] [2023-11-17 12:20:43,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:20:43,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:20:43,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:20:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:20:43,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2023-11-17 12:20:43,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:43,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:43,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2023-11-17 12:20:43,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:44,482 INFO L124 PetriNetUnfolderBase]: 6186/8359 cut-off events. [2023-11-17 12:20:44,482 INFO L125 PetriNetUnfolderBase]: For 2350/2350 co-relation queries the response was YES. [2023-11-17 12:20:44,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18909 conditions, 8359 events. 6186/8359 cut-off events. For 2350/2350 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 37099 event pairs, 2103 based on Foata normal form. 214/7895 useless extension candidates. Maximal degree in co-relation 11738. Up to 5450 conditions per place. [2023-11-17 12:20:44,531 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 63 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-17 12:20:44,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 66 transitions, 315 flow [2023-11-17 12:20:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:20:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:20:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-17 12:20:44,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2023-11-17 12:20:44,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-17 12:20:44,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-17 12:20:44,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:44,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-17 12:20:44,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:44,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:44,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:44,536 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 112 flow. Second operand 3 states and 118 transitions. [2023-11-17 12:20:44,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 66 transitions, 315 flow [2023-11-17 12:20:44,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 66 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:20:44,538 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 124 flow [2023-11-17 12:20:44,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-17 12:20:44,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-11-17 12:20:44,539 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 124 flow [2023-11-17 12:20:44,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:44,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:44,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:44,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:20:44,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:20:44,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:44,540 INFO L85 PathProgramCache]: Analyzing trace with hash -985597213, now seen corresponding path program 1 times [2023-11-17 12:20:44,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:44,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124807926] [2023-11-17 12:20:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:44,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:20:44,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:44,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124807926] [2023-11-17 12:20:44,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124807926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:20:44,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:20:44,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:20:44,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694293899] [2023-11-17 12:20:44,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:20:44,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:20:44,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:20:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:20:44,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2023-11-17 12:20:44,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:44,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:44,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2023-11-17 12:20:44,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:45,663 INFO L124 PetriNetUnfolderBase]: 7674/10716 cut-off events. [2023-11-17 12:20:45,663 INFO L125 PetriNetUnfolderBase]: For 3873/3873 co-relation queries the response was YES. [2023-11-17 12:20:45,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24959 conditions, 10716 events. 7674/10716 cut-off events. For 3873/3873 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 51767 event pairs, 6276 based on Foata normal form. 194/10816 useless extension candidates. Maximal degree in co-relation 14455. Up to 7657 conditions per place. [2023-11-17 12:20:45,729 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 69 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-11-17 12:20:45,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 74 transitions, 357 flow [2023-11-17 12:20:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:20:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:20:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2023-11-17 12:20:45,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58984375 [2023-11-17 12:20:45,734 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 151 transitions. [2023-11-17 12:20:45,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 151 transitions. [2023-11-17 12:20:45,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:45,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 151 transitions. [2023-11-17 12:20:45,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:45,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:45,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:45,737 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 124 flow. Second operand 4 states and 151 transitions. [2023-11-17 12:20:45,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 74 transitions, 357 flow [2023-11-17 12:20:45,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:20:45,743 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 142 flow [2023-11-17 12:20:45,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-17 12:20:45,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 12:20:45,745 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 142 flow [2023-11-17 12:20:45,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:45,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:45,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:45,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:20:45,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:20:45,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash 39991438, now seen corresponding path program 1 times [2023-11-17 12:20:45,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:45,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442427493] [2023-11-17 12:20:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:45,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:20:45,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442427493] [2023-11-17 12:20:45,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442427493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:20:45,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:20:45,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:20:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827698281] [2023-11-17 12:20:45,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:20:45,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:20:45,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:45,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:20:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:20:45,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2023-11-17 12:20:45,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:45,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:45,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2023-11-17 12:20:45,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:47,215 INFO L124 PetriNetUnfolderBase]: 10245/14538 cut-off events. [2023-11-17 12:20:47,215 INFO L125 PetriNetUnfolderBase]: For 5323/5323 co-relation queries the response was YES. [2023-11-17 12:20:47,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33112 conditions, 14538 events. 10245/14538 cut-off events. For 5323/5323 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 75967 event pairs, 8647 based on Foata normal form. 348/14833 useless extension candidates. Maximal degree in co-relation 24986. Up to 10312 conditions per place. [2023-11-17 12:20:47,288 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 68 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-11-17 12:20:47,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 372 flow [2023-11-17 12:20:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:20:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:20:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2023-11-17 12:20:47,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58203125 [2023-11-17 12:20:47,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 149 transitions. [2023-11-17 12:20:47,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 149 transitions. [2023-11-17 12:20:47,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:47,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 149 transitions. [2023-11-17 12:20:47,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:47,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:47,291 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:47,291 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 142 flow. Second operand 4 states and 149 transitions. [2023-11-17 12:20:47,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 372 flow [2023-11-17 12:20:47,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 368 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:20:47,301 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 161 flow [2023-11-17 12:20:47,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-17 12:20:47,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-11-17 12:20:47,303 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 161 flow [2023-11-17 12:20:47,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:47,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:47,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:47,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 12:20:47,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:20:47,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1831577808, now seen corresponding path program 1 times [2023-11-17 12:20:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:47,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666995185] [2023-11-17 12:20:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:47,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:20:47,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:47,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666995185] [2023-11-17 12:20:47,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666995185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:47,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752561686] [2023-11-17 12:20:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:47,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:47,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:47,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:20:47,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:20:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:47,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:20:47,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:20:48,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:20:48,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752561686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:48,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:48,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 17 [2023-11-17 12:20:48,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915625131] [2023-11-17 12:20:48,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:48,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:20:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:48,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:20:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:20:48,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:20:48,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 161 flow. Second operand has 18 states, 18 states have (on average 13.277777777777779) internal successors, (239), 18 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:48,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:48,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:20:48,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:55,227 INFO L124 PetriNetUnfolderBase]: 29006/40196 cut-off events. [2023-11-17 12:20:55,228 INFO L125 PetriNetUnfolderBase]: For 18044/18044 co-relation queries the response was YES. [2023-11-17 12:20:55,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96989 conditions, 40196 events. 29006/40196 cut-off events. For 18044/18044 co-relation queries the response was YES. Maximal size of possible extension queue 1251. Compared 235552 event pairs, 1126 based on Foata normal form. 3962/44156 useless extension candidates. Maximal degree in co-relation 84743. Up to 5035 conditions per place. [2023-11-17 12:20:55,462 INFO L140 encePairwiseOnDemand]: 47/64 looper letters, 746 selfloop transitions, 280 changer transitions 24/1050 dead transitions. [2023-11-17 12:20:55,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 1050 transitions, 5435 flow [2023-11-17 12:20:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-17 12:20:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-17 12:20:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 1645 transitions. [2023-11-17 12:20:55,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36201584507042256 [2023-11-17 12:20:55,470 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 1645 transitions. [2023-11-17 12:20:55,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 1645 transitions. [2023-11-17 12:20:55,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:55,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 1645 transitions. [2023-11-17 12:20:55,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 23.169014084507044) internal successors, (1645), 71 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:55,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 64.0) internal successors, (4608), 72 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:55,487 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 64.0) internal successors, (4608), 72 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:55,487 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 161 flow. Second operand 71 states and 1645 transitions. [2023-11-17 12:20:55,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 1050 transitions, 5435 flow [2023-11-17 12:20:55,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 1050 transitions, 5430 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:20:55,514 INFO L231 Difference]: Finished difference. Result has 184 places, 372 transitions, 2708 flow [2023-11-17 12:20:55,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=2708, PETRI_PLACES=184, PETRI_TRANSITIONS=372} [2023-11-17 12:20:55,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2023-11-17 12:20:55,517 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 372 transitions, 2708 flow [2023-11-17 12:20:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.277777777777779) internal successors, (239), 18 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:55,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:55,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:55,529 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 12:20:55,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 12:20:55,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:20:55,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash -128517234, now seen corresponding path program 2 times [2023-11-17 12:20:55,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:55,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805664211] [2023-11-17 12:20:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:55,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:20:56,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:56,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805664211] [2023-11-17 12:20:56,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805664211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:20:56,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:20:56,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 12:20:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669356202] [2023-11-17 12:20:56,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:20:56,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:20:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:20:56,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:20:56,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:20:56,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 372 transitions, 2708 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:56,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:56,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:20:56,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:21:03,498 INFO L124 PetriNetUnfolderBase]: 29470/41040 cut-off events. [2023-11-17 12:21:03,499 INFO L125 PetriNetUnfolderBase]: For 2400063/2400063 co-relation queries the response was YES. [2023-11-17 12:21:04,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357246 conditions, 41040 events. 29470/41040 cut-off events. For 2400063/2400063 co-relation queries the response was YES. Maximal size of possible extension queue 1265. Compared 241539 event pairs, 5538 based on Foata normal form. 52/41090 useless extension candidates. Maximal degree in co-relation 347891. Up to 33304 conditions per place. [2023-11-17 12:21:04,322 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 402 selfloop transitions, 40 changer transitions 41/483 dead transitions. [2023-11-17 12:21:04,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 483 transitions, 5081 flow [2023-11-17 12:21:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:21:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:21:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2023-11-17 12:21:04,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817708333333333 [2023-11-17 12:21:04,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 185 transitions. [2023-11-17 12:21:04,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 185 transitions. [2023-11-17 12:21:04,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:21:04,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 185 transitions. [2023-11-17 12:21:04,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:04,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:04,326 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:04,326 INFO L175 Difference]: Start difference. First operand has 184 places, 372 transitions, 2708 flow. Second operand 6 states and 185 transitions. [2023-11-17 12:21:04,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 483 transitions, 5081 flow [2023-11-17 12:21:11,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 483 transitions, 5013 flow, removed 34 selfloop flow, removed 0 redundant places. [2023-11-17 12:21:11,613 INFO L231 Difference]: Finished difference. Result has 192 places, 379 transitions, 2832 flow [2023-11-17 12:21:11,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2832, PETRI_PLACES=192, PETRI_TRANSITIONS=379} [2023-11-17 12:21:11,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2023-11-17 12:21:11,615 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 379 transitions, 2832 flow [2023-11-17 12:21:11,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:11,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:21:11,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:21:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:21:11,616 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:21:11,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:21:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1270801867, now seen corresponding path program 1 times [2023-11-17 12:21:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:21:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572398394] [2023-11-17 12:21:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:21:11,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:21:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:21:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:21:11,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:21:11,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572398394] [2023-11-17 12:21:11,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572398394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:21:11,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:21:11,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:21:11,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555153439] [2023-11-17 12:21:11,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:21:11,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:21:11,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:21:11,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:21:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:21:11,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:21:11,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 379 transitions, 2832 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:11,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:21:11,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:21:11,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:21:19,190 INFO L124 PetriNetUnfolderBase]: 30238/42302 cut-off events. [2023-11-17 12:21:19,190 INFO L125 PetriNetUnfolderBase]: For 2578588/2578588 co-relation queries the response was YES. [2023-11-17 12:21:19,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377741 conditions, 42302 events. 30238/42302 cut-off events. For 2578588/2578588 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 252090 event pairs, 6448 based on Foata normal form. 248/42548 useless extension candidates. Maximal degree in co-relation 368214. Up to 33120 conditions per place. [2023-11-17 12:21:20,110 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 410 selfloop transitions, 38 changer transitions 28/476 dead transitions. [2023-11-17 12:21:20,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 476 transitions, 5102 flow [2023-11-17 12:21:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:21:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:21:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2023-11-17 12:21:20,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2023-11-17 12:21:20,112 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 217 transitions. [2023-11-17 12:21:20,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 217 transitions. [2023-11-17 12:21:20,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:21:20,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 217 transitions. [2023-11-17 12:21:20,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:20,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:20,114 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:20,114 INFO L175 Difference]: Start difference. First operand has 192 places, 379 transitions, 2832 flow. Second operand 7 states and 217 transitions. [2023-11-17 12:21:20,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 476 transitions, 5102 flow [2023-11-17 12:21:27,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 476 transitions, 5065 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 12:21:27,292 INFO L231 Difference]: Finished difference. Result has 199 places, 382 transitions, 2966 flow [2023-11-17 12:21:27,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2966, PETRI_PLACES=199, PETRI_TRANSITIONS=382} [2023-11-17 12:21:27,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2023-11-17 12:21:27,295 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 382 transitions, 2966 flow [2023-11-17 12:21:27,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:27,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:21:27,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:21:27,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 12:21:27,296 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 2 more)] === [2023-11-17 12:21:27,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:21:27,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1509640753, now seen corresponding path program 2 times [2023-11-17 12:21:27,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:21:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804248135] [2023-11-17 12:21:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:21:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:21:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:21:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:21:27,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:21:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804248135] [2023-11-17 12:21:27,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804248135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:21:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123179407] [2023-11-17 12:21:27,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:21:27,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:21:27,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:21:27,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:21:27,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:21:27,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:21:27,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:21:27,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:21:27,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:21:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:21:27,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:21:27,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123179407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:21:27,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:21:27,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-17 12:21:27,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146562403] [2023-11-17 12:21:27,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:21:27,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:21:27,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:21:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:21:27,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:21:27,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 64 [2023-11-17 12:21:27,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 382 transitions, 2966 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:27,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:21:27,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 64 [2023-11-17 12:21:27,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:21:36,852 INFO L124 PetriNetUnfolderBase]: 34660/49473 cut-off events. [2023-11-17 12:21:36,853 INFO L125 PetriNetUnfolderBase]: For 3159609/3159609 co-relation queries the response was YES. [2023-11-17 12:21:37,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453884 conditions, 49473 events. 34660/49473 cut-off events. For 3159609/3159609 co-relation queries the response was YES. Maximal size of possible extension queue 1575. Compared 316458 event pairs, 6499 based on Foata normal form. 760/50231 useless extension candidates. Maximal degree in co-relation 428906. Up to 34740 conditions per place. [2023-11-17 12:21:38,002 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 525 selfloop transitions, 100 changer transitions 60/685 dead transitions. [2023-11-17 12:21:38,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 685 transitions, 8023 flow [2023-11-17 12:21:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:21:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:21:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 338 transitions. [2023-11-17 12:21:38,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2023-11-17 12:21:38,004 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 338 transitions. [2023-11-17 12:21:38,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 338 transitions. [2023-11-17 12:21:38,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:21:38,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 338 transitions. [2023-11-17 12:21:38,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 30.727272727272727) internal successors, (338), 11 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:38,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 64.0) internal successors, (768), 12 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:38,007 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 64.0) internal successors, (768), 12 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:38,007 INFO L175 Difference]: Start difference. First operand has 199 places, 382 transitions, 2966 flow. Second operand 11 states and 338 transitions. [2023-11-17 12:21:38,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 685 transitions, 8023 flow [2023-11-17 12:21:47,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 685 transitions, 7918 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-17 12:21:47,088 INFO L231 Difference]: Finished difference. Result has 213 places, 436 transitions, 3840 flow [2023-11-17 12:21:47,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=2920, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3840, PETRI_PLACES=213, PETRI_TRANSITIONS=436} [2023-11-17 12:21:47,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2023-11-17 12:21:47,089 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 436 transitions, 3840 flow [2023-11-17 12:21:47,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:47,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:21:47,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:21:47,098 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 12:21:47,296 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,SelfDestructingSolverStorable8 [2023-11-17 12:21:47,296 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 2 more)] === [2023-11-17 12:21:47,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:21:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash 759670877, now seen corresponding path program 3 times [2023-11-17 12:21:47,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:21:47,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063800292] [2023-11-17 12:21:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:21:47,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:21:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:21:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:21:47,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:21:47,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063800292] [2023-11-17 12:21:47,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063800292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:21:47,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:21:47,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:21:47,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646563482] [2023-11-17 12:21:47,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:21:47,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:21:47,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:21:47,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:21:47,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:21:47,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:21:47,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 436 transitions, 3840 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:47,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:21:47,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:21:47,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:00,031 INFO L124 PetriNetUnfolderBase]: 44584/64200 cut-off events. [2023-11-17 12:22:00,032 INFO L125 PetriNetUnfolderBase]: For 4330195/4330195 co-relation queries the response was YES. [2023-11-17 12:22:01,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613189 conditions, 64200 events. 44584/64200 cut-off events. For 4330195/4330195 co-relation queries the response was YES. Maximal size of possible extension queue 2061. Compared 432408 event pairs, 9231 based on Foata normal form. 436/64634 useless extension candidates. Maximal degree in co-relation 573197. Up to 35352 conditions per place. [2023-11-17 12:22:01,456 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 606 selfloop transitions, 155 changer transitions 33/794 dead transitions. [2023-11-17 12:22:01,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 794 transitions, 10124 flow [2023-11-17 12:22:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:22:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:22:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 325 transitions. [2023-11-17 12:22:01,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2023-11-17 12:22:01,458 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 325 transitions. [2023-11-17 12:22:01,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 325 transitions. [2023-11-17 12:22:01,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:01,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 325 transitions. [2023-11-17 12:22:01,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 32.5) internal successors, (325), 10 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:01,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 64.0) internal successors, (704), 11 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:01,461 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 64.0) internal successors, (704), 11 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:01,461 INFO L175 Difference]: Start difference. First operand has 213 places, 436 transitions, 3840 flow. Second operand 10 states and 325 transitions. [2023-11-17 12:22:01,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 794 transitions, 10124 flow [2023-11-17 12:22:20,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 794 transitions, 9893 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-17 12:22:20,060 INFO L231 Difference]: Finished difference. Result has 225 places, 505 transitions, 4995 flow [2023-11-17 12:22:20,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4995, PETRI_PLACES=225, PETRI_TRANSITIONS=505} [2023-11-17 12:22:20,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2023-11-17 12:22:20,061 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 505 transitions, 4995 flow [2023-11-17 12:22:20,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:20,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:20,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:22:20,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 12:22:20,062 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 2 more)] === [2023-11-17 12:22:20,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:20,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1040594053, now seen corresponding path program 4 times [2023-11-17 12:22:20,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:20,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928917037] [2023-11-17 12:22:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:20,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:22:20,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:20,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928917037] [2023-11-17 12:22:20,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928917037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:22:20,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:22:20,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 12:22:20,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053953966] [2023-11-17 12:22:20,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:22:20,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:22:20,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:22:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:22:20,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:22:20,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 505 transitions, 4995 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:20,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:20,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:22:20,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:34,470 INFO L124 PetriNetUnfolderBase]: 46801/68204 cut-off events. [2023-11-17 12:22:34,470 INFO L125 PetriNetUnfolderBase]: For 4650218/4650218 co-relation queries the response was YES. [2023-11-17 12:22:35,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673947 conditions, 68204 events. 46801/68204 cut-off events. For 4650218/4650218 co-relation queries the response was YES. Maximal size of possible extension queue 2280. Compared 474076 event pairs, 11092 based on Foata normal form. 388/68590 useless extension candidates. Maximal degree in co-relation 657378. Up to 55504 conditions per place. [2023-11-17 12:22:35,962 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 522 selfloop transitions, 123 changer transitions 167/812 dead transitions. [2023-11-17 12:22:35,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 812 transitions, 10607 flow [2023-11-17 12:22:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:22:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:22:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2023-11-17 12:22:35,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-17 12:22:35,964 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 252 transitions. [2023-11-17 12:22:35,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 252 transitions. [2023-11-17 12:22:35,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:35,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 252 transitions. [2023-11-17 12:22:35,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:35,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:35,966 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:35,966 INFO L175 Difference]: Start difference. First operand has 225 places, 505 transitions, 4995 flow. Second operand 9 states and 252 transitions. [2023-11-17 12:22:35,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 812 transitions, 10607 flow [2023-11-17 12:23:00,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 812 transitions, 10446 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 12:23:00,379 INFO L231 Difference]: Finished difference. Result has 237 places, 584 transitions, 6334 flow [2023-11-17 12:23:00,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6334, PETRI_PLACES=237, PETRI_TRANSITIONS=584} [2023-11-17 12:23:00,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2023-11-17 12:23:00,380 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 584 transitions, 6334 flow [2023-11-17 12:23:00,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:00,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:00,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 12:23:00,381 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 2 more)] === [2023-11-17 12:23:00,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash 521716199, now seen corresponding path program 5 times [2023-11-17 12:23:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902553025] [2023-11-17 12:23:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:00,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:23:00,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:00,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902553025] [2023-11-17 12:23:00,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902553025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:23:00,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:23:00,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 12:23:00,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762459461] [2023-11-17 12:23:00,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:23:00,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:23:00,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:00,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:23:00,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:23:00,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:23:00,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 584 transitions, 6334 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:00,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:00,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:23:00,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:14,867 INFO L124 PetriNetUnfolderBase]: 44392/63968 cut-off events. [2023-11-17 12:23:14,867 INFO L125 PetriNetUnfolderBase]: For 4452789/4452789 co-relation queries the response was YES. [2023-11-17 12:23:16,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636189 conditions, 63968 events. 44392/63968 cut-off events. For 4452789/4452789 co-relation queries the response was YES. Maximal size of possible extension queue 2069. Compared 431443 event pairs, 9584 based on Foata normal form. 116/64082 useless extension candidates. Maximal degree in co-relation 621449. Up to 49819 conditions per place. [2023-11-17 12:23:16,648 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 556 selfloop transitions, 161 changer transitions 22/739 dead transitions. [2023-11-17 12:23:16,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 739 transitions, 10102 flow [2023-11-17 12:23:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:23:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:23:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2023-11-17 12:23:16,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2023-11-17 12:23:16,649 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2023-11-17 12:23:16,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2023-11-17 12:23:16,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:16,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2023-11-17 12:23:16,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:16,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:16,650 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:16,650 INFO L175 Difference]: Start difference. First operand has 237 places, 584 transitions, 6334 flow. Second operand 6 states and 190 transitions. [2023-11-17 12:23:16,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 739 transitions, 10102 flow [2023-11-17 12:23:41,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 739 transitions, 10046 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-17 12:23:41,666 INFO L231 Difference]: Finished difference. Result has 239 places, 586 transitions, 6765 flow [2023-11-17 12:23:41,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6765, PETRI_PLACES=239, PETRI_TRANSITIONS=586} [2023-11-17 12:23:41,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2023-11-17 12:23:41,668 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 586 transitions, 6765 flow [2023-11-17 12:23:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:41,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:41,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:41,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 12:23:41,668 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 2 more)] === [2023-11-17 12:23:41,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash -951039671, now seen corresponding path program 6 times [2023-11-17 12:23:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:41,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021037794] [2023-11-17 12:23:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:41,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:23:41,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021037794] [2023-11-17 12:23:41,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021037794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:23:41,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:23:41,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:23:41,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539984282] [2023-11-17 12:23:41,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:23:41,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:23:41,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:41,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:23:41,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:23:41,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:23:41,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 586 transitions, 6765 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:41,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:41,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:23:41,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:55,508 INFO L124 PetriNetUnfolderBase]: 42752/61668 cut-off events. [2023-11-17 12:23:55,508 INFO L125 PetriNetUnfolderBase]: For 4275595/4275595 co-relation queries the response was YES. [2023-11-17 12:23:56,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611589 conditions, 61668 events. 42752/61668 cut-off events. For 4275595/4275595 co-relation queries the response was YES. Maximal size of possible extension queue 1978. Compared 414713 event pairs, 9223 based on Foata normal form. 144/61810 useless extension candidates. Maximal degree in co-relation 596687. Up to 48883 conditions per place. [2023-11-17 12:23:57,047 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 516 selfloop transitions, 188 changer transitions 18/722 dead transitions. [2023-11-17 12:23:57,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 722 transitions, 10222 flow [2023-11-17 12:23:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:23:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:23:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2023-11-17 12:23:57,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2023-11-17 12:23:57,048 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2023-11-17 12:23:57,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2023-11-17 12:23:57,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:57,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2023-11-17 12:23:57,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:57,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:57,050 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:57,050 INFO L175 Difference]: Start difference. First operand has 239 places, 586 transitions, 6765 flow. Second operand 6 states and 190 transitions. [2023-11-17 12:23:57,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 722 transitions, 10222 flow [2023-11-17 12:24:15,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 722 transitions, 9890 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-17 12:24:15,341 INFO L231 Difference]: Finished difference. Result has 240 places, 601 transitions, 7115 flow [2023-11-17 12:24:15,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=6361, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7115, PETRI_PLACES=240, PETRI_TRANSITIONS=601} [2023-11-17 12:24:15,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2023-11-17 12:24:15,342 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 601 transitions, 7115 flow [2023-11-17 12:24:15,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:15,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:15,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:15,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 12:24:15,342 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 2 more)] === [2023-11-17 12:24:15,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1297346719, now seen corresponding path program 7 times [2023-11-17 12:24:15,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:15,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495965581] [2023-11-17 12:24:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:15,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:24:15,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:15,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495965581] [2023-11-17 12:24:15,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495965581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:15,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120471640] [2023-11-17 12:24:15,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:24:15,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:15,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:15,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:24:15,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:24:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:15,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:24:15,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:24:15,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:24:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120471640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:15,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:15,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 15 [2023-11-17 12:24:15,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001893600] [2023-11-17 12:24:15,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:15,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:24:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:24:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:24:15,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:24:15,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 601 transitions, 7115 flow. Second operand has 15 states, 15 states have (on average 14.866666666666667) internal successors, (223), 15 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:15,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:15,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:24:15,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand