/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/parallel-ticket-8.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:09:52,019 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:09:52,119 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 12:09:52,154 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:09:52,155 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:09:52,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:09:52,156 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:09:52,157 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:09:52,157 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:09:52,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:09:52,158 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:09:52,158 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:09:52,158 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:09:52,159 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:09:52,159 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:09:52,159 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:09:52,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:09:52,160 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:09:52,164 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:09:52,164 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:09:52,171 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:09:52,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:09:52,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:09:52,172 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:09:52,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:09:52,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:09:52,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:09:52,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:09:52,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:09:52,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:09:52,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:09:52,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:09:52,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:09:52,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:09:52,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:09:52,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:09:52,501 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:09:52,501 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:09:52,502 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-8.wvr.c [2023-11-17 12:09:53,890 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:09:54,102 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:09:54,103 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-8.wvr.c [2023-11-17 12:09:54,111 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22129a60/57c83cf55ba94646a4aaff80ce534560/FLAGcf185bc4a [2023-11-17 12:09:54,124 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22129a60/57c83cf55ba94646a4aaff80ce534560 [2023-11-17 12:09:54,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:09:54,128 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:09:54,129 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:09:54,129 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:09:54,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:09:54,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7435609f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54, skipping insertion in model container [2023-11-17 12:09:54,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,162 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:09:54,329 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/parallel-ticket-8.wvr.c[5378,5391] [2023-11-17 12:09:54,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:09:54,347 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:09:54,391 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/parallel-ticket-8.wvr.c[5378,5391] [2023-11-17 12:09:54,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:09:54,406 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:09:54,407 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:09:54,415 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:09:54,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54 WrapperNode [2023-11-17 12:09:54,415 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:09:54,417 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:09:54,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:09:54,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:09:54,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,441 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,474 INFO L138 Inliner]: procedures = 27, calls = 130, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 377 [2023-11-17 12:09:54,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:09:54,476 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:09:54,476 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:09:54,476 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:09:54,484 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,498 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,501 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,503 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,510 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:09:54,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:09:54,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:09:54,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:09:54,513 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (1/1) ... [2023-11-17 12:09:54,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:09:54,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:09:54,551 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 12:09:54,564 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 12:09:54,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:09:54,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:09:54,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:09:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:09:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:09:54,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:09:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:09:54,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:09:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:09:54,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:09:54,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 12:09:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 12:09:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:09:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-17 12:09:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-17 12:09:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-17 12:09:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-17 12:09:54,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2023-11-17 12:09:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2023-11-17 12:09:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread8 [2023-11-17 12:09:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread8 [2023-11-17 12:09:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:09:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:09:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:09:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:09:54,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:09:54,595 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 12:09:54,755 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:09:54,761 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:09:55,242 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:09:55,596 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:09:55,596 INFO L307 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-17 12:09:55,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:09:55 BoogieIcfgContainer [2023-11-17 12:09:55,598 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:09:55,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:09:55,603 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:09:55,607 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:09:55,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:09:54" (1/3) ... [2023-11-17 12:09:55,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ed8b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:09:55, skipping insertion in model container [2023-11-17 12:09:55,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:09:54" (2/3) ... [2023-11-17 12:09:55,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ed8b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:09:55, skipping insertion in model container [2023-11-17 12:09:55,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:09:55" (3/3) ... [2023-11-17 12:09:55,612 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-8.wvr.c [2023-11-17 12:09:55,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:09:55,630 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:09:55,630 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:09:55,736 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-17 12:09:55,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 92 transitions, 240 flow [2023-11-17 12:09:55,850 INFO L124 PetriNetUnfolderBase]: 0/84 cut-off events. [2023-11-17 12:09:55,850 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 12:09:55,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 84 events. 0/84 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-17 12:09:55,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 92 transitions, 240 flow [2023-11-17 12:09:55,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 83 transitions, 214 flow [2023-11-17 12:09:55,862 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:09:55,879 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 83 transitions, 214 flow [2023-11-17 12:09:55,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 83 transitions, 214 flow [2023-11-17 12:09:55,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 83 transitions, 214 flow [2023-11-17 12:09:55,926 INFO L124 PetriNetUnfolderBase]: 0/83 cut-off events. [2023-11-17 12:09:55,927 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 12:09:55,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 83 events. 0/83 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-17 12:09:55,931 INFO L119 LiptonReduction]: Number of co-enabled transitions 3570 [2023-11-17 12:09:57,491 INFO L134 LiptonReduction]: Checked pairs total: 6489 [2023-11-17 12:09:57,491 INFO L136 LiptonReduction]: Total number of compositions: 33 [2023-11-17 12:09:57,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:09:57,525 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;@424e54a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:09:57,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 12:09:57,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:09:57,547 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2023-11-17 12:09:57,547 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 12:09:57,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:09:57,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:09:57,549 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 6 more)] === [2023-11-17 12:09:57,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:09:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1419811958, now seen corresponding path program 1 times [2023-11-17 12:09:57,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:09:57,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851521383] [2023-11-17 12:09:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:09:57,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:09:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:09:59,968 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 12:09:59,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:09:59,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851521383] [2023-11-17 12:09:59,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851521383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:09:59,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:09:59,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:09:59,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369026761] [2023-11-17 12:09:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:09:59,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:09:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:00,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:10:00,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:10:00,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 125 [2023-11-17 12:10:00,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 50 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:00,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:00,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 125 [2023-11-17 12:10:00,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:22,974 INFO L124 PetriNetUnfolderBase]: 232377/283581 cut-off events. [2023-11-17 12:10:22,974 INFO L125 PetriNetUnfolderBase]: For 16625/16625 co-relation queries the response was YES. [2023-11-17 12:10:23,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586214 conditions, 283581 events. 232377/283581 cut-off events. For 16625/16625 co-relation queries the response was YES. Maximal size of possible extension queue 5667. Compared 1412868 event pairs, 47237 based on Foata normal form. 1/283582 useless extension candidates. Maximal degree in co-relation 462248. Up to 120351 conditions per place. [2023-11-17 12:10:24,410 INFO L140 encePairwiseOnDemand]: 114/125 looper letters, 118 selfloop transitions, 17 changer transitions 43/178 dead transitions. [2023-11-17 12:10:24,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 178 transitions, 859 flow [2023-11-17 12:10:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:10:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:10:24,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2023-11-17 12:10:24,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37466666666666665 [2023-11-17 12:10:24,424 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 281 transitions. [2023-11-17 12:10:24,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 281 transitions. [2023-11-17 12:10:24,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:24,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 281 transitions. [2023-11-17 12:10:24,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 46.833333333333336) internal successors, (281), 6 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:24,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:24,437 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:24,439 INFO L175 Difference]: Start difference. First operand has 75 places, 50 transitions, 148 flow. Second operand 6 states and 281 transitions. [2023-11-17 12:10:24,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 178 transitions, 859 flow [2023-11-17 12:10:29,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 178 transitions, 761 flow, removed 0 selfloop flow, removed 16 redundant places. [2023-11-17 12:10:29,237 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 229 flow [2023-11-17 12:10:29,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-11-17 12:10:29,242 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -8 predicate places. [2023-11-17 12:10:29,243 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 229 flow [2023-11-17 12:10:29,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:29,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:29,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:10:29,244 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 6 more)] === [2023-11-17 12:10:29,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1822978288, now seen corresponding path program 2 times [2023-11-17 12:10:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:29,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997504610] [2023-11-17 12:10:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:29,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:30,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:30,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997504610] [2023-11-17 12:10:30,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997504610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:30,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:30,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:10:30,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326257132] [2023-11-17 12:10:30,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:30,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:10:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:10:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:10:30,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 125 [2023-11-17 12:10:30,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:30,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:30,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 125 [2023-11-17 12:10:30,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:48,471 INFO L124 PetriNetUnfolderBase]: 226327/277531 cut-off events. [2023-11-17 12:10:48,471 INFO L125 PetriNetUnfolderBase]: For 86519/86519 co-relation queries the response was YES. [2023-11-17 12:10:49,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794517 conditions, 277531 events. 226327/277531 cut-off events. For 86519/86519 co-relation queries the response was YES. Maximal size of possible extension queue 5830. Compared 1409784 event pairs, 45903 based on Foata normal form. 1/277532 useless extension candidates. Maximal degree in co-relation 794508. Up to 132544 conditions per place. [2023-11-17 12:10:49,903 INFO L140 encePairwiseOnDemand]: 114/125 looper letters, 138 selfloop transitions, 24 changer transitions 25/187 dead transitions. [2023-11-17 12:10:49,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 187 transitions, 967 flow [2023-11-17 12:10:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:10:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:10:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 283 transitions. [2023-11-17 12:10:49,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37733333333333335 [2023-11-17 12:10:49,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 283 transitions. [2023-11-17 12:10:49,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 283 transitions. [2023-11-17 12:10:49,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:49,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 283 transitions. [2023-11-17 12:10:49,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 47.166666666666664) internal successors, (283), 6 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:49,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:49,911 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:49,911 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 229 flow. Second operand 6 states and 283 transitions. [2023-11-17 12:10:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 187 transitions, 967 flow [2023-11-17 12:10:49,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 187 transitions, 956 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 12:10:49,979 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 365 flow [2023-11-17 12:10:49,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-11-17 12:10:49,980 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2023-11-17 12:10:49,980 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 365 flow [2023-11-17 12:10:49,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:49,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:49,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:49,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:10:49,981 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 6 more)] === [2023-11-17 12:10:49,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:49,981 INFO L85 PathProgramCache]: Analyzing trace with hash -744017506, now seen corresponding path program 3 times [2023-11-17 12:10:49,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:49,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065594638] [2023-11-17 12:10:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:49,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:50,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:50,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065594638] [2023-11-17 12:10:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065594638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:50,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:10:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638376501] [2023-11-17 12:10:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:10:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:10:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:10:50,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 125 [2023-11-17 12:10:50,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:50,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:50,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 125 [2023-11-17 12:10:50,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand