/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:11:38,336 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:11:38,428 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 12:11:38,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:11:38,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:11:38,462 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:11:38,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:11:38,463 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:11:38,464 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:11:38,467 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:11:38,467 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:11:38,468 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:11:38,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:11:38,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:11:38,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:11:38,470 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:11:38,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:11:38,470 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:11:38,470 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:11:38,471 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:11:38,471 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:11:38,471 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:11:38,472 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:11:38,472 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:11:38,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:11:38,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:11:38,473 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:11:38,473 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:11:38,473 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:11:38,473 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:11:38,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:11:38,474 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:11:38,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:11:38,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:11:38,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:11:38,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:11:38,751 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:11:38,751 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:11:38,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-11-17 12:11:39,951 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:11:40,157 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:11:40,158 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-11-17 12:11:40,165 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/225fcc4d7/a7f750f2fd9b400cb2df4fba169da64a/FLAGd84a1054c [2023-11-17 12:11:40,175 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/225fcc4d7/a7f750f2fd9b400cb2df4fba169da64a [2023-11-17 12:11:40,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:11:40,178 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:11:40,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:11:40,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:11:40,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:11:40,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6613433d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40, skipping insertion in model container [2023-11-17 12:11:40,186 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,220 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:11:40,414 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3986,3999] [2023-11-17 12:11:40,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:11:40,439 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:11:40,481 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3986,3999] [2023-11-17 12:11:40,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:11:40,501 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:11:40,501 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:11:40,506 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:11:40,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40 WrapperNode [2023-11-17 12:11:40,507 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:11:40,509 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:11:40,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:11:40,510 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:11:40,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,540 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,569 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 330 [2023-11-17 12:11:40,569 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:11:40,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:11:40,570 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:11:40,570 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:11:40,578 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,584 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,584 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,597 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,601 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:11:40,605 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:11:40,605 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:11:40,606 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:11:40,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (1/1) ... [2023-11-17 12:11:40,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:11:40,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:40,646 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 12:11:40,658 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 12:11:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:11:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:11:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:11:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:11:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:11:40,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:11:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:11:40,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:11:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:11:40,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:11:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:11:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:11:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:11:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:11:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:11:40,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:11:40,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:11:40,681 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 12:11:40,793 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:11:40,795 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:11:41,231 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:11:41,554 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:11:41,554 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 12:11:41,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:11:41 BoogieIcfgContainer [2023-11-17 12:11:41,556 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:11:41,558 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:11:41,558 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:11:41,561 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:11:41,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:11:40" (1/3) ... [2023-11-17 12:11:41,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533d814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:11:41, skipping insertion in model container [2023-11-17 12:11:41,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:40" (2/3) ... [2023-11-17 12:11:41,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533d814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:11:41, skipping insertion in model container [2023-11-17 12:11:41,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:11:41" (3/3) ... [2023-11-17 12:11:41,563 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-11-17 12:11:41,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:11:41,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:11:41,578 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:11:41,669 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 12:11:41,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 121 flow [2023-11-17 12:11:41,751 INFO L124 PetriNetUnfolderBase]: 8/47 cut-off events. [2023-11-17 12:11:41,751 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:11:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 8/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-17 12:11:41,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 121 flow [2023-11-17 12:11:41,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 46 transitions, 110 flow [2023-11-17 12:11:41,764 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:11:41,778 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 48 places, 46 transitions, 110 flow [2023-11-17 12:11:41,781 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 48 places, 46 transitions, 110 flow [2023-11-17 12:11:41,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 46 transitions, 110 flow [2023-11-17 12:11:41,802 INFO L124 PetriNetUnfolderBase]: 8/46 cut-off events. [2023-11-17 12:11:41,803 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:11:41,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 8/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-17 12:11:41,804 INFO L119 LiptonReduction]: Number of co-enabled transitions 710 [2023-11-17 12:11:43,518 INFO L134 LiptonReduction]: Checked pairs total: 1078 [2023-11-17 12:11:43,519 INFO L136 LiptonReduction]: Total number of compositions: 20 [2023-11-17 12:11:43,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:11:43,543 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;@6152b763, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:11:43,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 12:11:43,555 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:11:43,556 INFO L124 PetriNetUnfolderBase]: 7/30 cut-off events. [2023-11-17 12:11:43,556 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:11:43,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:43,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:43,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:43,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1909538651, now seen corresponding path program 1 times [2023-11-17 12:11:43,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:43,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603513840] [2023-11-17 12:11:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:43,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:44,001 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 12:11:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603513840] [2023-11-17 12:11:44,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603513840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:44,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:44,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:11:44,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408775824] [2023-11-17 12:11:44,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:11:44,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:44,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:11:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:11:44,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:44,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:44,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:44,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:44,257 INFO L124 PetriNetUnfolderBase]: 472/690 cut-off events. [2023-11-17 12:11:44,257 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-17 12:11:44,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 690 events. 472/690 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2127 event pairs, 135 based on Foata normal form. 30/575 useless extension candidates. Maximal degree in co-relation 1216. Up to 449 conditions per place. [2023-11-17 12:11:44,268 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 40 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2023-11-17 12:11:44,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 196 flow [2023-11-17 12:11:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:11:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:11:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2023-11-17 12:11:44,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2023-11-17 12:11:44,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 86 transitions. [2023-11-17 12:11:44,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 86 transitions. [2023-11-17 12:11:44,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:44,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 86 transitions. [2023-11-17 12:11:44,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 12:11:44,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,295 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 86 transitions. [2023-11-17 12:11:44,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 196 flow [2023-11-17 12:11:44,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 12:11:44,301 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 87 flow [2023-11-17 12:11:44,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-11-17 12:11:44,306 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-11-17 12:11:44,306 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 87 flow [2023-11-17 12:11:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:44,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:44,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:11:44,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:44,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:44,315 INFO L85 PathProgramCache]: Analyzing trace with hash -688389282, now seen corresponding path program 1 times [2023-11-17 12:11:44,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:44,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092996912] [2023-11-17 12:11:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:44,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:44,447 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 12:11:44,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:44,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092996912] [2023-11-17 12:11:44,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092996912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:44,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:44,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:11:44,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102803874] [2023-11-17 12:11:44,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:44,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:11:44,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:44,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:11:44,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:11:44,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:44,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:44,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:44,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:44,722 INFO L124 PetriNetUnfolderBase]: 839/1226 cut-off events. [2023-11-17 12:11:44,723 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-11-17 12:11:44,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2959 conditions, 1226 events. 839/1226 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4461 event pairs, 317 based on Foata normal form. 1/960 useless extension candidates. Maximal degree in co-relation 875. Up to 645 conditions per place. [2023-11-17 12:11:44,729 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 46 selfloop transitions, 2 changer transitions 6/54 dead transitions. [2023-11-17 12:11:44,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 54 transitions, 258 flow [2023-11-17 12:11:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:11:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:11:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-17 12:11:44,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-17 12:11:44,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-17 12:11:44,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-17 12:11:44,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:44,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-17 12:11:44,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 12:11:44,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,736 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 87 flow. Second operand 3 states and 90 transitions. [2023-11-17 12:11:44,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 54 transitions, 258 flow [2023-11-17 12:11:44,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 54 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:11:44,738 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 96 flow [2023-11-17 12:11:44,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-11-17 12:11:44,739 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-11-17 12:11:44,740 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 96 flow [2023-11-17 12:11:44,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:44,741 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] [2023-11-17 12:11:44,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:11:44,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:44,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1350594526, now seen corresponding path program 1 times [2023-11-17 12:11:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148229371] [2023-11-17 12:11:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:44,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:44,921 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 12:11:44,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:44,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148229371] [2023-11-17 12:11:44,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148229371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:44,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:44,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:11:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81791831] [2023-11-17 12:11:44,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:44,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:11:44,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:44,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:11:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:11:44,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:44,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:44,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:44,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:45,170 INFO L124 PetriNetUnfolderBase]: 870/1291 cut-off events. [2023-11-17 12:11:45,170 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-11-17 12:11:45,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 1291 events. 870/1291 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4566 event pairs, 625 based on Foata normal form. 26/1045 useless extension candidates. Maximal degree in co-relation 1650. Up to 1227 conditions per place. [2023-11-17 12:11:45,177 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 32 selfloop transitions, 2 changer transitions 18/52 dead transitions. [2023-11-17 12:11:45,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 241 flow [2023-11-17 12:11:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:11:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:11:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2023-11-17 12:11:45,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342857142857143 [2023-11-17 12:11:45,181 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 117 transitions. [2023-11-17 12:11:45,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 117 transitions. [2023-11-17 12:11:45,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:45,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 117 transitions. [2023-11-17 12:11:45,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,184 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,185 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 96 flow. Second operand 5 states and 117 transitions. [2023-11-17 12:11:45,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 241 flow [2023-11-17 12:11:45,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 52 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:11:45,187 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 120 flow [2023-11-17 12:11:45,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-17 12:11:45,188 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-11-17 12:11:45,189 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 120 flow [2023-11-17 12:11:45,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:45,189 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] [2023-11-17 12:11:45,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:11:45,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:45,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash -402137638, now seen corresponding path program 1 times [2023-11-17 12:11:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:45,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945717177] [2023-11-17 12:11:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:45,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:45,285 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 12:11:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945717177] [2023-11-17 12:11:45,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945717177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:45,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:45,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:11:45,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234907973] [2023-11-17 12:11:45,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:45,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:11:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:11:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:11:45,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:45,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:45,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:45,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:45,458 INFO L124 PetriNetUnfolderBase]: 658/962 cut-off events. [2023-11-17 12:11:45,458 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-11-17 12:11:45,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2577 conditions, 962 events. 658/962 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3032 event pairs, 269 based on Foata normal form. 38/754 useless extension candidates. Maximal degree in co-relation 2560. Up to 513 conditions per place. [2023-11-17 12:11:45,463 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 39 selfloop transitions, 3 changer transitions 5/47 dead transitions. [2023-11-17 12:11:45,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 256 flow [2023-11-17 12:11:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:11:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:11:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-17 12:11:45,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2023-11-17 12:11:45,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-17 12:11:45,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-17 12:11:45,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:45,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-17 12:11:45,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,467 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 120 flow. Second operand 3 states and 83 transitions. [2023-11-17 12:11:45,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 47 transitions, 256 flow [2023-11-17 12:11:45,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 244 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 12:11:45,469 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 131 flow [2023-11-17 12:11:45,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-17 12:11:45,470 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-11-17 12:11:45,470 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 131 flow [2023-11-17 12:11:45,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:45,471 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] [2023-11-17 12:11:45,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:11:45,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:45,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash -880361768, now seen corresponding path program 2 times [2023-11-17 12:11:45,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:45,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593625745] [2023-11-17 12:11:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:45,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:45,619 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 12:11:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:45,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593625745] [2023-11-17 12:11:45,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593625745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:45,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:45,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:11:45,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376541845] [2023-11-17 12:11:45,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:45,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:11:45,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:45,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:11:45,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:11:45,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:45,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:45,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:45,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:45,842 INFO L124 PetriNetUnfolderBase]: 782/1181 cut-off events. [2023-11-17 12:11:45,843 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2023-11-17 12:11:45,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3351 conditions, 1181 events. 782/1181 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4093 event pairs, 522 based on Foata normal form. 28/940 useless extension candidates. Maximal degree in co-relation 3329. Up to 963 conditions per place. [2023-11-17 12:11:45,848 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 35 selfloop transitions, 2 changer transitions 17/54 dead transitions. [2023-11-17 12:11:45,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 285 flow [2023-11-17 12:11:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:11:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:11:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2023-11-17 12:11:45,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2023-11-17 12:11:45,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 102 transitions. [2023-11-17 12:11:45,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 102 transitions. [2023-11-17 12:11:45,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:45,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 102 transitions. [2023-11-17 12:11:45,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.5) internal successors, (102), 4 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 12:11:45,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,851 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,851 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 131 flow. Second operand 4 states and 102 transitions. [2023-11-17 12:11:45,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 285 flow [2023-11-17 12:11:45,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:11:45,853 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 144 flow [2023-11-17 12:11:45,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-17 12:11:45,854 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-11-17 12:11:45,854 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 144 flow [2023-11-17 12:11:45,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:45,854 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 12:11:45,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 12:11:45,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:45,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2002331784, now seen corresponding path program 1 times [2023-11-17 12:11:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:45,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178517863] [2023-11-17 12:11:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:45,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:45,974 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 12:11:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:45,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178517863] [2023-11-17 12:11:45,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178517863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:45,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:11:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153689845] [2023-11-17 12:11:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:11:45,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:11:45,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:11:45,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:45,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:45,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:45,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:46,205 INFO L124 PetriNetUnfolderBase]: 983/1470 cut-off events. [2023-11-17 12:11:46,205 INFO L125 PetriNetUnfolderBase]: For 605/605 co-relation queries the response was YES. [2023-11-17 12:11:46,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4172 conditions, 1470 events. 983/1470 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5471 event pairs, 668 based on Foata normal form. 32/1161 useless extension candidates. Maximal degree in co-relation 4147. Up to 964 conditions per place. [2023-11-17 12:11:46,212 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 36 selfloop transitions, 2 changer transitions 21/59 dead transitions. [2023-11-17 12:11:46,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 329 flow [2023-11-17 12:11:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:11:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:11:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2023-11-17 12:11:46,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2023-11-17 12:11:46,214 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 104 transitions. [2023-11-17 12:11:46,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 104 transitions. [2023-11-17 12:11:46,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:46,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 104 transitions. [2023-11-17 12:11:46,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:46,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:46,216 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:46,217 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 144 flow. Second operand 4 states and 104 transitions. [2023-11-17 12:11:46,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 329 flow [2023-11-17 12:11:46,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 317 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 12:11:46,220 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 152 flow [2023-11-17 12:11:46,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-17 12:11:46,223 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-11-17 12:11:46,223 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 152 flow [2023-11-17 12:11:46,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:46,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:46,223 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] [2023-11-17 12:11:46,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 12:11:46,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:46,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash -808649106, now seen corresponding path program 1 times [2023-11-17 12:11:46,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:46,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536887472] [2023-11-17 12:11:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:11:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:46,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536887472] [2023-11-17 12:11:46,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536887472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:46,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506168235] [2023-11-17 12:11:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:46,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:46,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:46,409 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 12:11:46,442 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 12:11:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:46,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:11:46,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:11:46,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:11:46,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506168235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:46,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:46,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:11:46,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890533431] [2023-11-17 12:11:46,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:46,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:11:46,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:46,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:11:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:11:46,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:46,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 152 flow. Second operand has 11 states, 11 states have (on average 17.09090909090909) internal successors, (188), 11 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:46,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:46,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:46,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:47,089 INFO L124 PetriNetUnfolderBase]: 1143/1712 cut-off events. [2023-11-17 12:11:47,090 INFO L125 PetriNetUnfolderBase]: For 692/692 co-relation queries the response was YES. [2023-11-17 12:11:47,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5014 conditions, 1712 events. 1143/1712 cut-off events. For 692/692 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6719 event pairs, 482 based on Foata normal form. 48/1350 useless extension candidates. Maximal degree in co-relation 4272. Up to 964 conditions per place. [2023-11-17 12:11:47,097 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 36 selfloop transitions, 3 changer transitions 42/81 dead transitions. [2023-11-17 12:11:47,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 81 transitions, 468 flow [2023-11-17 12:11:47,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:11:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:11:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2023-11-17 12:11:47,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2023-11-17 12:11:47,098 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 161 transitions. [2023-11-17 12:11:47,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 161 transitions. [2023-11-17 12:11:47,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:47,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 161 transitions. [2023-11-17 12:11:47,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:47,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:47,100 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:47,100 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 152 flow. Second operand 7 states and 161 transitions. [2023-11-17 12:11:47,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 81 transitions, 468 flow [2023-11-17 12:11:47,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 81 transitions, 452 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-17 12:11:47,103 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 172 flow [2023-11-17 12:11:47,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-11-17 12:11:47,103 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-11-17 12:11:47,103 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 172 flow [2023-11-17 12:11:47,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.09090909090909) internal successors, (188), 11 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:47,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:47,104 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:47,113 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 12:11:47,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:47,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:47,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2007092216, now seen corresponding path program 2 times [2023-11-17 12:11:47,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:47,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428245738] [2023-11-17 12:11:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:47,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:11:48,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428245738] [2023-11-17 12:11:48,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428245738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331222534] [2023-11-17 12:11:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:11:48,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:48,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:48,210 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 12:11:48,233 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 12:11:48,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:48,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:48,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:11:48,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:11:48,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:11:48,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-17 12:11:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:48,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:48,628 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_217 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_217) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-11-17 12:11:48,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:48,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-11-17 12:11:48,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-17 12:11:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:11:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331222534] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:48,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:11:48,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 22 [2023-11-17 12:11:48,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717318235] [2023-11-17 12:11:48,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:48,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:11:48,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:48,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:11:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=398, Unknown=1, NotChecked=40, Total=506 [2023-11-17 12:11:48,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:11:48,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 172 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:48,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:11:48,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:48,976 INFO L124 PetriNetUnfolderBase]: 436/690 cut-off events. [2023-11-17 12:11:48,976 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-11-17 12:11:48,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2154 conditions, 690 events. 436/690 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2304 event pairs, 78 based on Foata normal form. 12/550 useless extension candidates. Maximal degree in co-relation 2125. Up to 421 conditions per place. [2023-11-17 12:11:48,980 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 62 selfloop transitions, 8 changer transitions 2/72 dead transitions. [2023-11-17 12:11:48,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 72 transitions, 444 flow [2023-11-17 12:11:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:11:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:11:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2023-11-17 12:11:48,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2693877551020408 [2023-11-17 12:11:48,982 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 132 transitions. [2023-11-17 12:11:48,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 132 transitions. [2023-11-17 12:11:48,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:48,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 132 transitions. [2023-11-17 12:11:48,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,983 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,983 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 172 flow. Second operand 7 states and 132 transitions. [2023-11-17 12:11:48,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 72 transitions, 444 flow [2023-11-17 12:11:48,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 72 transitions, 404 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-17 12:11:48,986 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 211 flow [2023-11-17 12:11:48,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=211, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-11-17 12:11:48,987 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-11-17 12:11:48,987 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 211 flow [2023-11-17 12:11:48,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:48,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:48,996 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 12:11:49,194 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,SelfDestructingSolverStorable7 [2023-11-17 12:11:49,194 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:49,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash -866481010, now seen corresponding path program 3 times [2023-11-17 12:11:49,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:49,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038635866] [2023-11-17 12:11:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:49,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:11:49,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:49,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038635866] [2023-11-17 12:11:49,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038635866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:49,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435833451] [2023-11-17 12:11:49,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:49,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:49,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:49,940 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 12:11:49,957 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 12:11:50,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:11:50,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:50,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:11:50,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:50,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:11:50,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:11:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:11:50,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:11:50,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-17 12:11:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:50,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:50,373 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_271 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_271) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-11-17 12:11:50,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:50,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2023-11-17 12:11:50,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-11-17 12:11:50,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-17 12:11:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:11:50,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435833451] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:50,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:11:50,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 9] total 25 [2023-11-17 12:11:50,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832339734] [2023-11-17 12:11:50,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:50,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:11:50,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:50,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:11:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=519, Unknown=5, NotChecked=46, Total=650 [2023-11-17 12:11:50,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:11:50,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 211 flow. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 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 12:11:50,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:50,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:11:50,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:50,850 INFO L124 PetriNetUnfolderBase]: 258/417 cut-off events. [2023-11-17 12:11:50,850 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-11-17 12:11:50,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1409 conditions, 417 events. 258/417 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1192 event pairs, 34 based on Foata normal form. 6/372 useless extension candidates. Maximal degree in co-relation 1372. Up to 178 conditions per place. [2023-11-17 12:11:50,854 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 60 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2023-11-17 12:11:50,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 422 flow [2023-11-17 12:11:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:11:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:11:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2023-11-17 12:11:50,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2571428571428571 [2023-11-17 12:11:50,855 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 126 transitions. [2023-11-17 12:11:50,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 126 transitions. [2023-11-17 12:11:50,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:50,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 126 transitions. [2023-11-17 12:11:50,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:50,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:50,857 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:50,857 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 211 flow. Second operand 7 states and 126 transitions. [2023-11-17 12:11:50,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 422 flow [2023-11-17 12:11:50,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 409 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 12:11:50,860 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 206 flow [2023-11-17 12:11:50,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=206, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-11-17 12:11:50,860 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2023-11-17 12:11:50,861 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 206 flow [2023-11-17 12:11:50,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 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 12:11:50,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:50,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:50,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:51,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:51,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:51,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1537355417, now seen corresponding path program 1 times [2023-11-17 12:11:51,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:51,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081436244] [2023-11-17 12:11:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:51,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:11:51,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:51,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081436244] [2023-11-17 12:11:51,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081436244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:51,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358566499] [2023-11-17 12:11:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:51,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:51,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:51,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:51,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:11:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:51,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:11:51,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:11:51,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:11:51,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358566499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:51,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:51,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-17 12:11:51,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433546359] [2023-11-17 12:11:51,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:11:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:11:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:11:51,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:51,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 206 flow. Second operand has 11 states, 11 states have (on average 17.0) internal successors, (187), 11 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:51,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:51,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:51,724 INFO L124 PetriNetUnfolderBase]: 426/708 cut-off events. [2023-11-17 12:11:51,724 INFO L125 PetriNetUnfolderBase]: For 1066/1066 co-relation queries the response was YES. [2023-11-17 12:11:51,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2386 conditions, 708 events. 426/708 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2321 event pairs, 232 based on Foata normal form. 52/676 useless extension candidates. Maximal degree in co-relation 2349. Up to 417 conditions per place. [2023-11-17 12:11:51,729 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 41 selfloop transitions, 3 changer transitions 34/78 dead transitions. [2023-11-17 12:11:51,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 516 flow [2023-11-17 12:11:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:11:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:11:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2023-11-17 12:11:51,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31020408163265306 [2023-11-17 12:11:51,730 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 152 transitions. [2023-11-17 12:11:51,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 152 transitions. [2023-11-17 12:11:51,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:51,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 152 transitions. [2023-11-17 12:11:51,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 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 12:11:51,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,732 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,732 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 206 flow. Second operand 7 states and 152 transitions. [2023-11-17 12:11:51,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 516 flow [2023-11-17 12:11:51,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 499 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-17 12:11:51,735 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 221 flow [2023-11-17 12:11:51,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-11-17 12:11:51,735 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 28 predicate places. [2023-11-17 12:11:51,735 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 221 flow [2023-11-17 12:11:51,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.0) internal successors, (187), 11 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:51,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:51,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:51,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:51,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:51,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1297227141, now seen corresponding path program 2 times [2023-11-17 12:11:51,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:51,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289787312] [2023-11-17 12:11:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:51,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:11:52,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:52,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289787312] [2023-11-17 12:11:52,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289787312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:52,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:52,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:11:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046311600] [2023-11-17 12:11:52,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:52,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:11:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:11:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:11:52,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 12:11:52,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:52,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:52,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 12:11:52,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:52,200 INFO L124 PetriNetUnfolderBase]: 428/676 cut-off events. [2023-11-17 12:11:52,200 INFO L125 PetriNetUnfolderBase]: For 966/966 co-relation queries the response was YES. [2023-11-17 12:11:52,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 676 events. 428/676 cut-off events. For 966/966 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2096 event pairs, 83 based on Foata normal form. 26/584 useless extension candidates. Maximal degree in co-relation 2376. Up to 273 conditions per place. [2023-11-17 12:11:52,206 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 69 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2023-11-17 12:11:52,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 519 flow [2023-11-17 12:11:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:11:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:11:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2023-11-17 12:11:52,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2023-11-17 12:11:52,207 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2023-11-17 12:11:52,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2023-11-17 12:11:52,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:52,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2023-11-17 12:11:52,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 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 12:11:52,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:52,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:52,209 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 221 flow. Second operand 4 states and 118 transitions. [2023-11-17 12:11:52,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 519 flow [2023-11-17 12:11:52,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 493 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-11-17 12:11:52,213 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 276 flow [2023-11-17 12:11:52,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-11-17 12:11:52,214 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2023-11-17 12:11:52,214 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 276 flow [2023-11-17 12:11:52,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:52,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:52,214 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:52,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 12:11:52,214 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:11:52,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash 560201587, now seen corresponding path program 3 times [2023-11-17 12:11:52,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:52,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972508720] [2023-11-17 12:11:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972508720] [2023-11-17 12:11:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972508720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22921982] [2023-11-17 12:11:54,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:54,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:54,069 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:54,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:11:54,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:11:54,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:54,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:11:54,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:54,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-17 12:11:54,871 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:11:54,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2023-11-17 12:11:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:54,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:55,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:55,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-17 12:11:55,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:55,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-17 12:11:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:11:55,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22921982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:55,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:55,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 42 [2023-11-17 12:11:55,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783384606] [2023-11-17 12:11:55,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:55,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:11:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:55,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:11:55,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:11:55,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:11:55,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 276 flow. Second operand has 42 states, 42 states have (on average 12.071428571428571) internal successors, (507), 42 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:55,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:55,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:11:55,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:04,803 INFO L124 PetriNetUnfolderBase]: 5194/7917 cut-off events. [2023-11-17 12:12:04,803 INFO L125 PetriNetUnfolderBase]: For 15095/15095 co-relation queries the response was YES. [2023-11-17 12:12:04,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30841 conditions, 7917 events. 5194/7917 cut-off events. For 15095/15095 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42428 event pairs, 270 based on Foata normal form. 448/6772 useless extension candidates. Maximal degree in co-relation 17984. Up to 3557 conditions per place. [2023-11-17 12:12:04,875 INFO L140 encePairwiseOnDemand]: 55/70 looper letters, 446 selfloop transitions, 251 changer transitions 125/822 dead transitions. [2023-11-17 12:12:04,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 822 transitions, 6162 flow [2023-11-17 12:12:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-17 12:12:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-17 12:12:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 1517 transitions. [2023-11-17 12:12:04,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26754850088183424 [2023-11-17 12:12:04,884 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 1517 transitions. [2023-11-17 12:12:04,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 1517 transitions. [2023-11-17 12:12:04,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:04,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 1517 transitions. [2023-11-17 12:12:04,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 18.728395061728396) internal successors, (1517), 81 states have internal predecessors, (1517), 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 12:12:04,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 70.0) internal successors, (5740), 82 states have internal predecessors, (5740), 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 12:12:04,902 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 70.0) internal successors, (5740), 82 states have internal predecessors, (5740), 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 12:12:04,903 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 276 flow. Second operand 81 states and 1517 transitions. [2023-11-17 12:12:04,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 822 transitions, 6162 flow [2023-11-17 12:12:04,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 822 transitions, 5652 flow, removed 255 selfloop flow, removed 0 redundant places. [2023-11-17 12:12:04,927 INFO L231 Difference]: Finished difference. Result has 172 places, 343 transitions, 3279 flow [2023-11-17 12:12:04,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=3279, PETRI_PLACES=172, PETRI_TRANSITIONS=343} [2023-11-17 12:12:04,929 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 138 predicate places. [2023-11-17 12:12:04,929 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 343 transitions, 3279 flow [2023-11-17 12:12:04,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 12.071428571428571) internal successors, (507), 42 states have internal predecessors, (507), 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 12:12:04,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:04,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:04,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:05,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-17 12:12:05,131 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:12:05,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 239301319, now seen corresponding path program 4 times [2023-11-17 12:12:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:05,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667127767] [2023-11-17 12:12:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:05,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:12:06,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:06,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667127767] [2023-11-17 12:12:06,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667127767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:06,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316013086] [2023-11-17 12:12:06,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:12:06,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:06,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:06,438 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:06,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:12:06,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:12:06,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:06,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-17 12:12:06,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:12:07,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 12:12:07,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:12:07,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:12:07,597 INFO L349 Elim1Store]: treesize reduction 65, result has 29.3 percent of original size [2023-11-17 12:12:07,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 44 [2023-11-17 12:12:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:07,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:08,256 INFO L349 Elim1Store]: treesize reduction 24, result has 83.7 percent of original size [2023-11-17 12:12:08,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 271 [2023-11-17 12:12:08,287 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:12:08,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:08,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 161 [2023-11-17 12:12:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:11,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316013086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:11,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:11,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-11-17 12:12:11,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696984132] [2023-11-17 12:12:11,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:11,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 12:12:11,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 12:12:11,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1921, Unknown=1, NotChecked=0, Total=2162 [2023-11-17 12:12:11,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:12:11,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 343 transitions, 3279 flow. Second operand has 47 states, 47 states have (on average 11.872340425531915) internal successors, (558), 47 states have internal predecessors, (558), 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 12:12:11,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:11,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:12:11,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:15,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:12:37,741 INFO L124 PetriNetUnfolderBase]: 11875/19088 cut-off events. [2023-11-17 12:12:37,741 INFO L125 PetriNetUnfolderBase]: For 176821/176821 co-relation queries the response was YES. [2023-11-17 12:12:37,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98326 conditions, 19088 events. 11875/19088 cut-off events. For 176821/176821 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 130226 event pairs, 1041 based on Foata normal form. 1136/18524 useless extension candidates. Maximal degree in co-relation 87501. Up to 8366 conditions per place. [2023-11-17 12:12:38,043 INFO L140 encePairwiseOnDemand]: 54/70 looper letters, 1014 selfloop transitions, 646 changer transitions 495/2155 dead transitions. [2023-11-17 12:12:38,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 2155 transitions, 23094 flow [2023-11-17 12:12:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-11-17 12:12:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2023-11-17 12:12:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 2357 transitions. [2023-11-17 12:12:38,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2737514518002323 [2023-11-17 12:12:38,058 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 2357 transitions. [2023-11-17 12:12:38,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 2357 transitions. [2023-11-17 12:12:38,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:38,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 2357 transitions. [2023-11-17 12:12:38,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 19.16260162601626) internal successors, (2357), 123 states have internal predecessors, (2357), 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 12:12:38,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 70.0) internal successors, (8680), 124 states have internal predecessors, (8680), 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 12:12:38,083 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 70.0) internal successors, (8680), 124 states have internal predecessors, (8680), 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 12:12:38,083 INFO L175 Difference]: Start difference. First operand has 172 places, 343 transitions, 3279 flow. Second operand 123 states and 2357 transitions. [2023-11-17 12:12:38,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 2155 transitions, 23094 flow [2023-11-17 12:12:39,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 2155 transitions, 19563 flow, removed 1746 selfloop flow, removed 11 redundant places. [2023-11-17 12:12:39,591 INFO L231 Difference]: Finished difference. Result has 337 places, 940 transitions, 10592 flow [2023-11-17 12:12:39,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=10592, PETRI_PLACES=337, PETRI_TRANSITIONS=940} [2023-11-17 12:12:39,592 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 303 predicate places. [2023-11-17 12:12:39,592 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 940 transitions, 10592 flow [2023-11-17 12:12:39,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 11.872340425531915) internal successors, (558), 47 states have internal predecessors, (558), 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 12:12:39,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:39,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:39,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:39,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:39,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:12:39,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash -252746927, now seen corresponding path program 5 times [2023-11-17 12:12:39,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:39,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785876736] [2023-11-17 12:12:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:39,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:12:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785876736] [2023-11-17 12:12:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785876736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447759720] [2023-11-17 12:12:40,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:12:40,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:40,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:40,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:40,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:12:41,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:12:41,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:41,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:12:41,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:12:41,574 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-17 12:12:41,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 41 [2023-11-17 12:12:41,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:41,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-17 12:12:41,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:41,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2023-11-17 12:12:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:12:42,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:42,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:42,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 122 [2023-11-17 12:12:42,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-17 12:12:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:12:43,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447759720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:43,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:43,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 12:12:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705811888] [2023-11-17 12:12:43,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:43,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:12:43,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:12:43,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:12:43,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:12:43,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 940 transitions, 10592 flow. Second operand has 42 states, 42 states have (on average 12.095238095238095) internal successors, (508), 42 states have internal predecessors, (508), 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 12:12:43,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:43,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:12:43,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:47,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:12:49,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:12:51,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:12:53,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-17 12:13:02,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-17 12:13:48,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-17 12:14:59,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:15:04,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:15:06,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-17 12:15:44,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:22,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:27,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:29,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:49,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:51,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:43,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:46,181 INFO L124 PetriNetUnfolderBase]: 12525/20897 cut-off events. [2023-11-17 12:17:46,182 INFO L125 PetriNetUnfolderBase]: For 281415/281415 co-relation queries the response was YES. [2023-11-17 12:17:46,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115818 conditions, 20897 events. 12525/20897 cut-off events. For 281415/281415 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 154732 event pairs, 1446 based on Foata normal form. 2460/22357 useless extension candidates. Maximal degree in co-relation 115634. Up to 4331 conditions per place. [2023-11-17 12:17:46,461 INFO L140 encePairwiseOnDemand]: 54/70 looper letters, 670 selfloop transitions, 806 changer transitions 597/2073 dead transitions. [2023-11-17 12:17:46,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 2073 transitions, 26375 flow [2023-11-17 12:17:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-17 12:17:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-11-17 12:17:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 1575 transitions. [2023-11-17 12:17:46,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24725274725274726 [2023-11-17 12:17:46,469 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 1575 transitions. [2023-11-17 12:17:46,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 1575 transitions. [2023-11-17 12:17:46,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:46,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 1575 transitions. [2023-11-17 12:17:46,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 17.307692307692307) internal successors, (1575), 91 states have internal predecessors, (1575), 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 12:17:46,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 70.0) internal successors, (6440), 92 states have internal predecessors, (6440), 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 12:17:46,485 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 70.0) internal successors, (6440), 92 states have internal predecessors, (6440), 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 12:17:46,485 INFO L175 Difference]: Start difference. First operand has 337 places, 940 transitions, 10592 flow. Second operand 91 states and 1575 transitions. [2023-11-17 12:17:46,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 2073 transitions, 26375 flow [2023-11-17 12:17:51,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 2073 transitions, 25248 flow, removed 547 selfloop flow, removed 26 redundant places. [2023-11-17 12:17:51,052 INFO L231 Difference]: Finished difference. Result has 409 places, 1143 transitions, 15409 flow [2023-11-17 12:17:51,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9073, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=15409, PETRI_PLACES=409, PETRI_TRANSITIONS=1143} [2023-11-17 12:17:51,053 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 375 predicate places. [2023-11-17 12:17:51,054 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1143 transitions, 15409 flow [2023-11-17 12:17:51,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 12.095238095238095) internal successors, (508), 42 states have internal predecessors, (508), 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 12:17:51,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:51,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:51,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:17:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:51,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:17:51,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash -547682271, now seen corresponding path program 6 times [2023-11-17 12:17:51,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:51,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815488079] [2023-11-17 12:17:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:51,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:17:52,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:52,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815488079] [2023-11-17 12:17:52,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815488079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:52,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8800081] [2023-11-17 12:17:52,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:17:52,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:52,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:17:52,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:17:52,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:17:52,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:52,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:17:52,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:17:53,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:17:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:17:53,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:17:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:17:53,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:53,506 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_579 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_579))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2023-11-17 12:17:53,536 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_579 (Array Int Int)) (v_ArrVal_578 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_578) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_579))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))))))) is different from false [2023-11-17 12:17:53,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:17:53,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 964 treesize of output 912 [2023-11-17 12:17:53,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:17:53,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 365 [2023-11-17 12:17:53,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:17:53,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 290 [2023-11-17 12:18:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:18:01,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8800081] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:01,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:18:01,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16, 10] total 33 [2023-11-17 12:18:01,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616460849] [2023-11-17 12:18:01,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:18:01,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:18:01,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:18:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=899, Unknown=2, NotChecked=122, Total=1122 [2023-11-17 12:18:01,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:18:01,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1143 transitions, 15409 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 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 12:18:01,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:01,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:18:01,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:01,679 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~q2_back~0 4)) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse1 (* c_~q2_front~0 4))) (and (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~q1~0.base)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse0 (select |c_#memory_int| ~q2~0.base))) (or (< 0 (select .cse0 (+ ~q2~0.offset .cse1))) (< (+ (select .cse0 (+ ~q2~0.offset .cse2)) 1) (select (select |c_#memory_int| c_~q1~0.base) .cse3))))) (forall ((v_ArrVal_579 (Array Int Int)) (v_ArrVal_578 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_578) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_579))) (let ((.cse4 (select .cse5 ~q2~0.base))) (or (< (+ (select .cse4 (+ ~q2~0.offset .cse2)) 1) (select (select .cse5 c_~q1~0.base) .cse3)) (< 0 (select .cse4 (+ ~q2~0.offset .cse1))))))) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| c_~q1~0.base)))) is different from false [2023-11-17 12:18:03,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:18:10,163 INFO L124 PetriNetUnfolderBase]: 8853/14574 cut-off events. [2023-11-17 12:18:10,164 INFO L125 PetriNetUnfolderBase]: For 189406/189406 co-relation queries the response was YES. [2023-11-17 12:18:10,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85287 conditions, 14574 events. 8853/14574 cut-off events. For 189406/189406 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 97072 event pairs, 2755 based on Foata normal form. 10/13732 useless extension candidates. Maximal degree in co-relation 85157. Up to 13746 conditions per place. [2023-11-17 12:18:10,383 INFO L140 encePairwiseOnDemand]: 56/70 looper letters, 1116 selfloop transitions, 59 changer transitions 0/1175 dead transitions. [2023-11-17 12:18:10,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1175 transitions, 17816 flow [2023-11-17 12:18:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:18:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:18:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2023-11-17 12:18:10,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24444444444444444 [2023-11-17 12:18:10,385 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 154 transitions. [2023-11-17 12:18:10,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 154 transitions. [2023-11-17 12:18:10,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:10,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 154 transitions. [2023-11-17 12:18:10,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 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 12:18:10,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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 12:18:10,387 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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 12:18:10,387 INFO L175 Difference]: Start difference. First operand has 409 places, 1143 transitions, 15409 flow. Second operand 9 states and 154 transitions. [2023-11-17 12:18:10,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1175 transitions, 17816 flow [2023-11-17 12:18:12,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1175 transitions, 16847 flow, removed 290 selfloop flow, removed 32 redundant places. [2023-11-17 12:18:12,969 INFO L231 Difference]: Finished difference. Result has 367 places, 1158 transitions, 14699 flow [2023-11-17 12:18:12,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=14048, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1067, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14699, PETRI_PLACES=367, PETRI_TRANSITIONS=1158} [2023-11-17 12:18:12,971 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 333 predicate places. [2023-11-17 12:18:12,971 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1158 transitions, 14699 flow [2023-11-17 12:18:12,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 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 12:18:12,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:12,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:12,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:13,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 12:18:13,178 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:13,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1756163415, now seen corresponding path program 7 times [2023-11-17 12:18:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459272167] [2023-11-17 12:18:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:13,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:14,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459272167] [2023-11-17 12:18:14,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459272167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:14,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717965537] [2023-11-17 12:18:14,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:18:14,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:14,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:14,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:14,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:18:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:14,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 12:18:14,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:15,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:18:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:15,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:15,617 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:18:15,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2023-11-17 12:18:15,764 INFO L349 Elim1Store]: treesize reduction 7, result has 85.1 percent of original size [2023-11-17 12:18:15,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 51 [2023-11-17 12:18:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:15,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:16,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:16,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 262 treesize of output 298 [2023-11-17 12:18:16,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:16,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 111 [2023-11-17 12:18:17,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-17 12:18:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:18,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717965537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:18,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:18,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-11-17 12:18:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760640093] [2023-11-17 12:18:18,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 12:18:18,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 12:18:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1938, Unknown=3, NotChecked=0, Total=2162 [2023-11-17 12:18:18,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:18:18,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1158 transitions, 14699 flow. Second operand has 47 states, 47 states have (on average 11.829787234042554) internal successors, (556), 47 states have internal predecessors, (556), 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 12:18:18,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:18,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:18:18,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:28,116 INFO L124 PetriNetUnfolderBase]: 8117/13156 cut-off events. [2023-11-17 12:18:28,116 INFO L125 PetriNetUnfolderBase]: For 156413/156413 co-relation queries the response was YES. [2023-11-17 12:18:28,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72570 conditions, 13156 events. 8117/13156 cut-off events. For 156413/156413 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 82396 event pairs, 1806 based on Foata normal form. 696/12976 useless extension candidates. Maximal degree in co-relation 72455. Up to 5086 conditions per place. [2023-11-17 12:18:28,275 INFO L140 encePairwiseOnDemand]: 54/70 looper letters, 517 selfloop transitions, 232 changer transitions 333/1082 dead transitions. [2023-11-17 12:18:28,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1082 transitions, 14674 flow [2023-11-17 12:18:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-17 12:18:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-17 12:18:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 789 transitions. [2023-11-17 12:18:28,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21675824175824177 [2023-11-17 12:18:28,278 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 789 transitions. [2023-11-17 12:18:28,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 789 transitions. [2023-11-17 12:18:28,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:28,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 789 transitions. [2023-11-17 12:18:28,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 15.173076923076923) internal successors, (789), 52 states have internal predecessors, (789), 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 12:18:28,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 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 12:18:28,285 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 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 12:18:28,285 INFO L175 Difference]: Start difference. First operand has 367 places, 1158 transitions, 14699 flow. Second operand 52 states and 789 transitions. [2023-11-17 12:18:28,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1082 transitions, 14674 flow [2023-11-17 12:18:29,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1082 transitions, 13824 flow, removed 136 selfloop flow, removed 37 redundant places. [2023-11-17 12:18:29,367 INFO L231 Difference]: Finished difference. Result has 364 places, 528 transitions, 6103 flow [2023-11-17 12:18:29,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8436, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=6103, PETRI_PLACES=364, PETRI_TRANSITIONS=528} [2023-11-17 12:18:29,368 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 330 predicate places. [2023-11-17 12:18:29,368 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 528 transitions, 6103 flow [2023-11-17 12:18:29,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 11.829787234042554) internal successors, (556), 47 states have internal predecessors, (556), 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 12:18:29,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:29,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:29,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:29,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:18:29,576 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:18:29,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1621662313, now seen corresponding path program 8 times [2023-11-17 12:18:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:29,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124431198] [2023-11-17 12:18:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:29,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:31,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:31,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124431198] [2023-11-17 12:18:31,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124431198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:31,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852491911] [2023-11-17 12:18:31,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:18:31,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:31,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:31,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:31,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:18:31,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:18:31,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:31,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:18:31,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:31,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:31,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:18:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:18:31,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:32,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:32,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 190 [2023-11-17 12:18:32,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:32,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 97 [2023-11-17 12:18:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:18:32,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852491911] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:32,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:18:32,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17, 10] total 33 [2023-11-17 12:18:32,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125006294] [2023-11-17 12:18:32,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:18:32,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:18:32,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:18:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=991, Unknown=25, NotChecked=0, Total=1122 [2023-11-17 12:18:32,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:18:32,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 528 transitions, 6103 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 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 12:18:32,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:32,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:18:32,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:50,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:18:57,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:02,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:03,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:05,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:07,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:09,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:11,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:14,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:16,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:19:19,040 INFO L124 PetriNetUnfolderBase]: 6821/10922 cut-off events. [2023-11-17 12:19:19,041 INFO L125 PetriNetUnfolderBase]: For 95688/95688 co-relation queries the response was YES. [2023-11-17 12:19:19,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57516 conditions, 10922 events. 6821/10922 cut-off events. For 95688/95688 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 64499 event pairs, 1651 based on Foata normal form. 8/10058 useless extension candidates. Maximal degree in co-relation 57416. Up to 9713 conditions per place. [2023-11-17 12:19:19,154 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 461 selfloop transitions, 95 changer transitions 0/556 dead transitions. [2023-11-17 12:19:19,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 556 transitions, 7441 flow [2023-11-17 12:19:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:19:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:19:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2023-11-17 12:19:19,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2396825396825397 [2023-11-17 12:19:19,155 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 151 transitions. [2023-11-17 12:19:19,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 151 transitions. [2023-11-17 12:19:19,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:19,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 151 transitions. [2023-11-17 12:19:19,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 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 12:19:19,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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 12:19:19,157 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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 12:19:19,157 INFO L175 Difference]: Start difference. First operand has 364 places, 528 transitions, 6103 flow. Second operand 9 states and 151 transitions. [2023-11-17 12:19:19,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 556 transitions, 7441 flow [2023-11-17 12:19:19,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 556 transitions, 6589 flow, removed 113 selfloop flow, removed 52 redundant places. [2023-11-17 12:19:19,563 INFO L231 Difference]: Finished difference. Result has 268 places, 536 transitions, 5655 flow [2023-11-17 12:19:19,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5655, PETRI_PLACES=268, PETRI_TRANSITIONS=536} [2023-11-17 12:19:19,564 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 234 predicate places. [2023-11-17 12:19:19,564 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 536 transitions, 5655 flow [2023-11-17 12:19:19,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 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 12:19:19,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:19,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:19,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:19:19,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 12:19:19,771 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:19:19,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash 630594765, now seen corresponding path program 9 times [2023-11-17 12:19:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:19,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441654699] [2023-11-17 12:19:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:19,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:19:21,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:21,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441654699] [2023-11-17 12:19:21,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441654699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:21,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937156469] [2023-11-17 12:19:21,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:19:21,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:21,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:21,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:19:21,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:19:21,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:19:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:21,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:19:21,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:21,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-17 12:19:21,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-11-17 12:19:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:19:21,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:19:21,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937156469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:19:21,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:19:21,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 26 [2023-11-17 12:19:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714947929] [2023-11-17 12:19:21,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:19:21,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:19:21,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:19:21,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:19:21,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:19:21,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 536 transitions, 5655 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 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 12:19:21,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:21,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:19:21,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:23,907 INFO L124 PetriNetUnfolderBase]: 6927/11175 cut-off events. [2023-11-17 12:19:23,907 INFO L125 PetriNetUnfolderBase]: For 49547/49547 co-relation queries the response was YES. [2023-11-17 12:19:23,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53312 conditions, 11175 events. 6927/11175 cut-off events. For 49547/49547 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 66437 event pairs, 1620 based on Foata normal form. 8/10311 useless extension candidates. Maximal degree in co-relation 53243. Up to 9888 conditions per place. [2023-11-17 12:19:24,022 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 473 selfloop transitions, 115 changer transitions 0/588 dead transitions. [2023-11-17 12:19:24,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 588 transitions, 7466 flow [2023-11-17 12:19:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:19:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:19:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2023-11-17 12:19:24,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2396825396825397 [2023-11-17 12:19:24,023 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 151 transitions. [2023-11-17 12:19:24,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 151 transitions. [2023-11-17 12:19:24,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:24,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 151 transitions. [2023-11-17 12:19:24,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 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 12:19:24,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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 12:19:24,024 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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 12:19:24,024 INFO L175 Difference]: Start difference. First operand has 268 places, 536 transitions, 5655 flow. Second operand 9 states and 151 transitions. [2023-11-17 12:19:24,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 588 transitions, 7466 flow [2023-11-17 12:19:24,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 588 transitions, 7346 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-11-17 12:19:24,239 INFO L231 Difference]: Finished difference. Result has 274 places, 571 transitions, 6414 flow [2023-11-17 12:19:24,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5552, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6414, PETRI_PLACES=274, PETRI_TRANSITIONS=571} [2023-11-17 12:19:24,240 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 240 predicate places. [2023-11-17 12:19:24,240 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 571 transitions, 6414 flow [2023-11-17 12:19:24,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 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 12:19:24,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:24,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:24,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:19:24,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 12:19:24,445 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:19:24,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash -399263247, now seen corresponding path program 10 times [2023-11-17 12:19:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:24,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762555651] [2023-11-17 12:19:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:19:26,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:26,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762555651] [2023-11-17 12:19:26,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762555651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:26,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237234985] [2023-11-17 12:19:26,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:19:26,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:26,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:26,028 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:19:26,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:19:26,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:19:26,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:26,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:19:26,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-17 12:19:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 12:19:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 12:19:26,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 12:19:26,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 12:19:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-17 12:19:26,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 12:19:26,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 12:19:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 12:19:26,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 12:19:26,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 12:19:26,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:26,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 12:19:26,419 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:19:26,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 12:19:26,763 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-17 12:19:26,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 42 [2023-11-17 12:19:26,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:26,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2023-11-17 12:19:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:19:26,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:27,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:27,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 122 [2023-11-17 12:19:27,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-17 12:19:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:19:27,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237234985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:27,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:27,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 40 [2023-11-17 12:19:27,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433204133] [2023-11-17 12:19:27,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:27,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 12:19:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 12:19:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 12:19:27,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:19:27,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 571 transitions, 6414 flow. Second operand has 41 states, 41 states have (on average 12.0) internal successors, (492), 41 states have internal predecessors, (492), 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 12:19:27,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:27,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:19:27,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:32,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:37,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:40,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:42,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:44,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:58,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:20:12,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:20:14,171 INFO L124 PetriNetUnfolderBase]: 8875/14770 cut-off events. [2023-11-17 12:20:14,171 INFO L125 PetriNetUnfolderBase]: For 68384/68384 co-relation queries the response was YES. [2023-11-17 12:20:14,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72176 conditions, 14770 events. 8875/14770 cut-off events. For 68384/68384 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 97282 event pairs, 2693 based on Foata normal form. 488/14044 useless extension candidates. Maximal degree in co-relation 72105. Up to 7853 conditions per place. [2023-11-17 12:20:14,321 INFO L140 encePairwiseOnDemand]: 54/70 looper letters, 707 selfloop transitions, 198 changer transitions 44/949 dead transitions. [2023-11-17 12:20:14,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 949 transitions, 11719 flow [2023-11-17 12:20:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-17 12:20:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-11-17 12:20:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 961 transitions. [2023-11-17 12:20:14,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23268765133171912 [2023-11-17 12:20:14,325 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 961 transitions. [2023-11-17 12:20:14,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 961 transitions. [2023-11-17 12:20:14,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:14,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 961 transitions. [2023-11-17 12:20:14,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 16.28813559322034) internal successors, (961), 59 states have internal predecessors, (961), 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 12:20:14,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 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 12:20:14,332 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 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 12:20:14,332 INFO L175 Difference]: Start difference. First operand has 274 places, 571 transitions, 6414 flow. Second operand 59 states and 961 transitions. [2023-11-17 12:20:14,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 949 transitions, 11719 flow [2023-11-17 12:20:14,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 949 transitions, 11445 flow, removed 44 selfloop flow, removed 7 redundant places. [2023-11-17 12:20:14,726 INFO L231 Difference]: Finished difference. Result has 340 places, 603 transitions, 7800 flow [2023-11-17 12:20:14,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=7800, PETRI_PLACES=340, PETRI_TRANSITIONS=603} [2023-11-17 12:20:14,727 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 306 predicate places. [2023-11-17 12:20:14,727 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 603 transitions, 7800 flow [2023-11-17 12:20:14,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 12.0) internal successors, (492), 41 states have internal predecessors, (492), 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 12:20:14,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:14,727 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:14,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 12:20:14,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:14,928 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 12:20:14,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1420707585, now seen corresponding path program 11 times [2023-11-17 12:20:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:14,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630161880] [2023-11-17 12:20:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:20:16,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:16,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630161880] [2023-11-17 12:20:16,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630161880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:16,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084576264] [2023-11-17 12:20:16,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:20:16,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:16,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:16,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:20:16,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:20:17,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:20:17,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:17,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 12:20:17,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:20:17,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-17 12:20:17,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:20:17,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:20:17,680 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:20:17,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2023-11-17 12:20:18,456 INFO L349 Elim1Store]: treesize reduction 7, result has 86.5 percent of original size [2023-11-17 12:20:18,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 56 [2023-11-17 12:20:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:20:18,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:18,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:20:18,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 262 treesize of output 298 [2023-11-17 12:20:18,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:20:18,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 111 [2023-11-17 12:20:18,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-17 12:20:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:20:21,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084576264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:21,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:21,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 42 [2023-11-17 12:20:21,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833306984] [2023-11-17 12:20:21,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:21,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 12:20:21,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:21,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 12:20:21,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1652, Unknown=2, NotChecked=0, Total=1806 [2023-11-17 12:20:21,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 70 [2023-11-17 12:20:21,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 603 transitions, 7800 flow. Second operand has 43 states, 43 states have (on average 11.906976744186046) internal successors, (512), 43 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 12:20:21,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:21,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 70 [2023-11-17 12:20:21,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:28,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:20:30,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] Received shutdown request... [2023-11-17 12:20:32,431 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:20:32,431 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:20:32,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 12:20:32,547 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-17 12:20:32,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-17 12:20:32,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-17 12:20:32,748 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (43states, 10/70 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 29694 conditions, 4798 events (2418/4797 cut-off events. For 46396/46396 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36344 event pairs, 806 based on Foata normal form. 18/4989 useless extension candidates. Maximal degree in co-relation 29606. Up to 2340 conditions per place.). [2023-11-17 12:20:32,750 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-17 12:20:32,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 12:20:32,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-17 12:20:32,751 INFO L445 BasicCegarLoop]: Path program histogram: [11, 3, 2, 1, 1, 1, 1] [2023-11-17 12:20:32,755 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:20:32,755 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:20:32,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:20:32 BasicIcfg [2023-11-17 12:20:32,757 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:20:32,758 INFO L158 Benchmark]: Toolchain (without parser) took 532579.64ms. Allocated memory was 192.9MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 134.2MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2023-11-17 12:20:32,758 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 192.9MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:20:32,758 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.32ms. Allocated memory is still 192.9MB. Free memory was 134.2MB in the beginning and 121.4MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 12:20:32,758 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.17ms. Allocated memory is still 192.9MB. Free memory was 121.4MB in the beginning and 118.8MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 12:20:32,758 INFO L158 Benchmark]: Boogie Preprocessor took 34.83ms. Allocated memory is still 192.9MB. Free memory was 118.5MB in the beginning and 116.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:20:32,760 INFO L158 Benchmark]: RCFGBuilder took 950.64ms. Allocated memory is still 192.9MB. Free memory was 116.4MB in the beginning and 87.0MB in the end (delta: 29.4MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. [2023-11-17 12:20:32,760 INFO L158 Benchmark]: TraceAbstraction took 531199.37ms. Allocated memory was 192.9MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 86.5MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2023-11-17 12:20:32,762 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 192.9MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 327.32ms. Allocated memory is still 192.9MB. Free memory was 134.2MB in the beginning and 121.4MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 60.17ms. Allocated memory is still 192.9MB. Free memory was 121.4MB in the beginning and 118.8MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.83ms. Allocated memory is still 192.9MB. Free memory was 118.5MB in the beginning and 116.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 950.64ms. Allocated memory is still 192.9MB. Free memory was 116.4MB in the beginning and 87.0MB in the end (delta: 29.4MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. * TraceAbstraction took 531199.37ms. Allocated memory was 192.9MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 86.5MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 48 PlacesBefore, 34 PlacesAfterwards, 46 TransitionsBefore, 31 TransitionsAfterwards, 710 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 20 TotalNumberOfCompositions, 1078 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 866, independent: 833, independent conditional: 0, independent unconditional: 833, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 506, independent: 488, independent conditional: 0, independent unconditional: 488, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 506, independent: 483, independent conditional: 0, independent unconditional: 483, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 23, independent: 5, independent conditional: 0, independent unconditional: 5, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 114, independent: 30, independent conditional: 0, independent unconditional: 30, dependent: 83, dependent conditional: 0, dependent unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 866, independent: 345, independent conditional: 0, independent unconditional: 345, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 506, unknown conditional: 0, unknown unconditional: 506] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 82, Positive conditional cache size: 0, Positive unconditional cache size: 82, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (43states, 10/70 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 29694 conditions, 4798 events (2418/4797 cut-off events. For 46396/46396 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36344 event pairs, 806 based on Foata normal form. 18/4989 useless extension candidates. Maximal degree in co-relation 29606. Up to 2340 conditions per place.). - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (43states, 10/70 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 29694 conditions, 4798 events (2418/4797 cut-off events. For 46396/46396 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36344 event pairs, 806 based on Foata normal form. 18/4989 useless extension candidates. Maximal degree in co-relation 29606. Up to 2340 conditions per place.). - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (43states, 10/70 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 29694 conditions, 4798 events (2418/4797 cut-off events. For 46396/46396 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36344 event pairs, 806 based on Foata normal form. 18/4989 useless extension candidates. Maximal degree in co-relation 29606. Up to 2340 conditions per place.). - TimeoutResultAtElement [Line: 144]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (43states, 10/70 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 29694 conditions, 4798 events (2418/4797 cut-off events. For 46396/46396 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36344 event pairs, 806 based on Foata normal form. 18/4989 useless extension candidates. Maximal degree in co-relation 29606. Up to 2340 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 70 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 531.1s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 478.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 67 mSolverCounterUnknown, 5427 SdHoareTripleChecker+Valid, 96.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5427 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 94.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 311 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1469 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16471 IncrementalHoareTripleChecker+Invalid, 18318 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1469 mSolverCounterUnsat, 0 mSDtfsCounter, 16471 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1394 GetRequests, 556 SyntacticMatches, 4 SemanticMatches, 834 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 20609 ImplicationChecksByTransitivity, 354.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15409occurred in iteration=14, InterpolantAutomatonStates: 487, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 43.8s InterpolantComputationTime, 999 NumberOfCodeBlocks, 998 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1330 ConstructedInterpolants, 90 QuantifiedInterpolants, 21662 SizeOfPredicates, 189 NumberOfNonLiveVariables, 5186 ConjunctsInSsa, 372 ConjunctsInUnsatCore, 45 InterpolantComputations, 12 PerfectInterpolantSequences, 175/383 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown