/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:24:59,895 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:24:59,952 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 12:24:59,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:24:59,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:24:59,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:24:59,992 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:24:59,993 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:24:59,993 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:24:59,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:24:59,998 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:24:59,998 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:24:59,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:24:59,999 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:24:59,999 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:25:00,000 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:25:00,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:25:00,000 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:25:00,000 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:25:00,000 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:25:00,000 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:25:00,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:25:00,001 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:25:00,001 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:25:00,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:25:00,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:25:00,002 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:25:00,002 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:25:00,003 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:25:00,003 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:25:00,004 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:25:00,004 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:25:00,004 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:25:00,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:25:00,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:25:00,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:25:00,214 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:25:00,214 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:25:00,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-17 12:25:01,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:25:01,325 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:25:01,326 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-11-17 12:25:01,333 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c74b5032/6fffc51c2eb5418a9abc8334cb03f6e2/FLAG1368a5823 [2023-11-17 12:25:01,347 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c74b5032/6fffc51c2eb5418a9abc8334cb03f6e2 [2023-11-17 12:25:01,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:25:01,351 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:25:01,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:25:01,354 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:25:01,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:25:01,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f20e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01, skipping insertion in model container [2023-11-17 12:25:01,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,385 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:25:01,554 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3654,3667] [2023-11-17 12:25:01,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:25:01,567 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:25:01,582 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3654,3667] [2023-11-17 12:25:01,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:25:01,590 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:25:01,590 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:25:01,595 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:25:01,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01 WrapperNode [2023-11-17 12:25:01,595 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:25:01,596 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:25:01,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:25:01,597 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:25:01,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,649 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 270 [2023-11-17 12:25:01,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:25:01,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:25:01,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:25:01,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:25:01,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,659 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,659 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,665 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,668 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,669 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,674 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:25:01,674 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:25:01,674 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:25:01,675 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:25:01,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (1/1) ... [2023-11-17 12:25:01,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:25:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:01,702 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 12:25:01,723 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 12:25:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:25:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:25:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:25:01,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:25:01,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:25:01,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:25:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:25:01,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:25:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:25:01,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:25:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:25:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:25:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:25:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:25:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:25:01,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:25:01,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:25:01,732 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 12:25:01,808 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:25:01,810 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:25:02,204 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:25:02,432 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:25:02,432 INFO L307 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-17 12:25:02,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:25:02 BoogieIcfgContainer [2023-11-17 12:25:02,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:25:02,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:25:02,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:25:02,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:25:02,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:25:01" (1/3) ... [2023-11-17 12:25:02,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c4c04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:25:02, skipping insertion in model container [2023-11-17 12:25:02,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:25:01" (2/3) ... [2023-11-17 12:25:02,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c4c04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:25:02, skipping insertion in model container [2023-11-17 12:25:02,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:25:02" (3/3) ... [2023-11-17 12:25:02,443 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-11-17 12:25:02,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:25:02,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:25:02,456 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:25:02,493 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 12:25:02,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 46 transitions, 113 flow [2023-11-17 12:25:02,553 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2023-11-17 12:25:02,553 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:25:02,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 7/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-17 12:25:02,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 46 transitions, 113 flow [2023-11-17 12:25:02,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 42 transitions, 102 flow [2023-11-17 12:25:02,562 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:25:02,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 42 transitions, 102 flow [2023-11-17 12:25:02,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 42 transitions, 102 flow [2023-11-17 12:25:02,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 102 flow [2023-11-17 12:25:02,589 INFO L124 PetriNetUnfolderBase]: 7/42 cut-off events. [2023-11-17 12:25:02,589 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:25:02,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 42 events. 7/42 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-17 12:25:02,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 622 [2023-11-17 12:25:03,421 INFO L134 LiptonReduction]: Checked pairs total: 871 [2023-11-17 12:25:03,422 INFO L136 LiptonReduction]: Total number of compositions: 18 [2023-11-17 12:25:03,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:25:03,442 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;@7069ab16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:25:03,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 12:25:03,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:25:03,453 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-17 12:25:03,453 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:25:03,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:03,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:03,454 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 12:25:03,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:03,457 INFO L85 PathProgramCache]: Analyzing trace with hash -725260960, now seen corresponding path program 1 times [2023-11-17 12:25:03,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:03,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083519070] [2023-11-17 12:25:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:03,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:03,719 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 12:25:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:03,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083519070] [2023-11-17 12:25:03,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083519070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:03,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:03,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:25:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140503211] [2023-11-17 12:25:03,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:03,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:25:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:25:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:25:03,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:25:03,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:03,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:03,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:25:03,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:03,848 INFO L124 PetriNetUnfolderBase]: 370/543 cut-off events. [2023-11-17 12:25:03,849 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-17 12:25:03,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1154 conditions, 543 events. 370/543 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1575 event pairs, 101 based on Foata normal form. 24/443 useless extension candidates. Maximal degree in co-relation 912. Up to 356 conditions per place. [2023-11-17 12:25:03,853 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-11-17 12:25:03,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 180 flow [2023-11-17 12:25:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:25:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:25:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-17 12:25:03,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2023-11-17 12:25:03,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-17 12:25:03,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-17 12:25:03,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:03,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-17 12:25:03,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:03,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:03,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:03,867 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 76 transitions. [2023-11-17 12:25:03,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 180 flow [2023-11-17 12:25:03,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 12:25:03,871 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 81 flow [2023-11-17 12:25:03,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-11-17 12:25:03,874 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-17 12:25:03,874 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 81 flow [2023-11-17 12:25:03,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:03,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:03,875 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 12:25:03,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:25:03,875 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 12:25:03,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash -242358402, now seen corresponding path program 1 times [2023-11-17 12:25:03,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:03,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62119628] [2023-11-17 12:25:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:03,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:04,036 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 12:25:04,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:04,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62119628] [2023-11-17 12:25:04,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62119628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:04,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:04,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:25:04,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508465956] [2023-11-17 12:25:04,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:04,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:25:04,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:04,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:25:04,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:25:04,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:25:04,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:04,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:25:04,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:04,167 INFO L124 PetriNetUnfolderBase]: 399/604 cut-off events. [2023-11-17 12:25:04,168 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-17 12:25:04,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 604 events. 399/604 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1777 event pairs, 265 based on Foata normal form. 26/503 useless extension candidates. Maximal degree in co-relation 516. Up to 544 conditions per place. [2023-11-17 12:25:04,171 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 28 selfloop transitions, 2 changer transitions 14/44 dead transitions. [2023-11-17 12:25:04,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 202 flow [2023-11-17 12:25:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:25:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:25:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2023-11-17 12:25:04,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 12:25:04,172 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2023-11-17 12:25:04,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2023-11-17 12:25:04,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:04,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2023-11-17 12:25:04,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,174 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,174 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 81 flow. Second operand 5 states and 100 transitions. [2023-11-17 12:25:04,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 202 flow [2023-11-17 12:25:04,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:25:04,175 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 100 flow [2023-11-17 12:25:04,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-17 12:25:04,176 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-17 12:25:04,176 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 100 flow [2023-11-17 12:25:04,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:04,176 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 12:25:04,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:25:04,177 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 12:25:04,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:04,177 INFO L85 PathProgramCache]: Analyzing trace with hash -2029190451, now seen corresponding path program 1 times [2023-11-17 12:25:04,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:04,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065408873] [2023-11-17 12:25:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:04,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:04,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:04,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065408873] [2023-11-17 12:25:04,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065408873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:04,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:04,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:25:04,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809676583] [2023-11-17 12:25:04,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:04,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:25:04,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:04,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:25:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:25:04,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:25:04,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:04,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:25:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:04,374 INFO L124 PetriNetUnfolderBase]: 481/729 cut-off events. [2023-11-17 12:25:04,374 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-17 12:25:04,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 729 events. 481/729 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2310 event pairs, 329 based on Foata normal form. 22/606 useless extension candidates. Maximal degree in co-relation 1853. Up to 545 conditions per place. [2023-11-17 12:25:04,377 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 29 selfloop transitions, 2 changer transitions 15/46 dead transitions. [2023-11-17 12:25:04,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 238 flow [2023-11-17 12:25:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:25:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:25:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2023-11-17 12:25:04,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34765625 [2023-11-17 12:25:04,379 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 89 transitions. [2023-11-17 12:25:04,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 89 transitions. [2023-11-17 12:25:04,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:04,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 89 transitions. [2023-11-17 12:25:04,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,380 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,380 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 100 flow. Second operand 4 states and 89 transitions. [2023-11-17 12:25:04,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 238 flow [2023-11-17 12:25:04,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 226 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 12:25:04,381 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 108 flow [2023-11-17 12:25:04,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-17 12:25:04,382 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-11-17 12:25:04,382 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 108 flow [2023-11-17 12:25:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:04,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:04,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:04,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:25:04,383 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 12:25:04,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -785153115, now seen corresponding path program 1 times [2023-11-17 12:25:04,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:04,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351451316] [2023-11-17 12:25:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:05,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:05,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351451316] [2023-11-17 12:25:05,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351451316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:05,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:05,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 12:25:05,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949651023] [2023-11-17 12:25:05,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:05,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:25:05,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:25:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:25:05,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 64 [2023-11-17 12:25:05,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 108 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:05,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 64 [2023-11-17 12:25:05,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:05,457 INFO L124 PetriNetUnfolderBase]: 592/882 cut-off events. [2023-11-17 12:25:05,457 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2023-11-17 12:25:05,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 conditions, 882 events. 592/882 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3132 event pairs, 27 based on Foata normal form. 1/678 useless extension candidates. Maximal degree in co-relation 2363. Up to 596 conditions per place. [2023-11-17 12:25:05,461 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 73 selfloop transitions, 22 changer transitions 3/98 dead transitions. [2023-11-17 12:25:05,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 98 transitions, 513 flow [2023-11-17 12:25:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:25:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:25:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2023-11-17 12:25:05,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3211805555555556 [2023-11-17 12:25:05,464 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 185 transitions. [2023-11-17 12:25:05,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 185 transitions. [2023-11-17 12:25:05,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:05,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 185 transitions. [2023-11-17 12:25:05,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.555555555555557) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,468 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,468 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 108 flow. Second operand 9 states and 185 transitions. [2023-11-17 12:25:05,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 98 transitions, 513 flow [2023-11-17 12:25:05,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 98 transitions, 493 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 12:25:05,472 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 261 flow [2023-11-17 12:25:05,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2023-11-17 12:25:05,473 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-11-17 12:25:05,473 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 261 flow [2023-11-17 12:25:05,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:05,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:05,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:25:05,474 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 12:25:05,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1338367643, now seen corresponding path program 2 times [2023-11-17 12:25:05,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:05,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751716592] [2023-11-17 12:25:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:05,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:05,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751716592] [2023-11-17 12:25:05,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751716592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:05,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:25:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281310922] [2023-11-17 12:25:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:25:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:25:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:25:05,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:25:05,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:05,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:25:05,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:05,631 INFO L124 PetriNetUnfolderBase]: 481/735 cut-off events. [2023-11-17 12:25:05,632 INFO L125 PetriNetUnfolderBase]: For 489/489 co-relation queries the response was YES. [2023-11-17 12:25:05,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2471 conditions, 735 events. 481/735 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2448 event pairs, 121 based on Foata normal form. 12/589 useless extension candidates. Maximal degree in co-relation 2446. Up to 674 conditions per place. [2023-11-17 12:25:05,636 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 50 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-11-17 12:25:05,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 353 flow [2023-11-17 12:25:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:25:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:25:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-17 12:25:05,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2023-11-17 12:25:05,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-17 12:25:05,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-17 12:25:05,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:05,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-17 12:25:05,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,639 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 261 flow. Second operand 3 states and 70 transitions. [2023-11-17 12:25:05,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 353 flow [2023-11-17 12:25:05,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 319 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-17 12:25:05,643 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 206 flow [2023-11-17 12:25:05,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-11-17 12:25:05,645 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-11-17 12:25:05,645 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 206 flow [2023-11-17 12:25:05,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:05,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:05,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 12:25:05,646 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 12:25:05,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash -48411151, now seen corresponding path program 3 times [2023-11-17 12:25:05,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:05,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669362998] [2023-11-17 12:25:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:05,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:06,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:06,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669362998] [2023-11-17 12:25:06,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669362998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:06,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:06,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 12:25:06,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168064629] [2023-11-17 12:25:06,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:06,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:25:06,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:25:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:25:06,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 64 [2023-11-17 12:25:06,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 206 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:06,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:06,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 64 [2023-11-17 12:25:06,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:06,460 INFO L124 PetriNetUnfolderBase]: 548/847 cut-off events. [2023-11-17 12:25:06,460 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2023-11-17 12:25:06,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2811 conditions, 847 events. 548/847 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3020 event pairs, 103 based on Foata normal form. 1/677 useless extension candidates. Maximal degree in co-relation 2785. Up to 708 conditions per place. [2023-11-17 12:25:06,465 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 71 selfloop transitions, 16 changer transitions 3/90 dead transitions. [2023-11-17 12:25:06,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 540 flow [2023-11-17 12:25:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:25:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:25:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2023-11-17 12:25:06,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2847222222222222 [2023-11-17 12:25:06,467 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 164 transitions. [2023-11-17 12:25:06,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 164 transitions. [2023-11-17 12:25:06,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:06,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 164 transitions. [2023-11-17 12:25:06,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:06,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:06,468 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:06,468 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 206 flow. Second operand 9 states and 164 transitions. [2023-11-17 12:25:06,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 540 flow [2023-11-17 12:25:06,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 90 transitions, 530 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 12:25:06,472 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 328 flow [2023-11-17 12:25:06,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=328, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-11-17 12:25:06,474 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2023-11-17 12:25:06,474 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 328 flow [2023-11-17 12:25:06,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:06,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:06,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:06,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 12:25:06,474 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 12:25:06,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1320689427, now seen corresponding path program 4 times [2023-11-17 12:25:06,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:06,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013173950] [2023-11-17 12:25:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:06,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:06,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013173950] [2023-11-17 12:25:06,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013173950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:06,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:06,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 12:25:06,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375699331] [2023-11-17 12:25:06,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:06,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:25:06,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:06,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:25:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:25:06,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 64 [2023-11-17 12:25:06,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 328 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:06,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:06,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 64 [2023-11-17 12:25:06,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:07,197 INFO L124 PetriNetUnfolderBase]: 607/947 cut-off events. [2023-11-17 12:25:07,197 INFO L125 PetriNetUnfolderBase]: For 1101/1101 co-relation queries the response was YES. [2023-11-17 12:25:07,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3517 conditions, 947 events. 607/947 cut-off events. For 1101/1101 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3503 event pairs, 173 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3487. Up to 808 conditions per place. [2023-11-17 12:25:07,203 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 75 selfloop transitions, 19 changer transitions 3/97 dead transitions. [2023-11-17 12:25:07,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 97 transitions, 689 flow [2023-11-17 12:25:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:25:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:25:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2023-11-17 12:25:07,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28125 [2023-11-17 12:25:07,204 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 162 transitions. [2023-11-17 12:25:07,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 162 transitions. [2023-11-17 12:25:07,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:07,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 162 transitions. [2023-11-17 12:25:07,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:07,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:07,206 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:07,206 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 328 flow. Second operand 9 states and 162 transitions. [2023-11-17 12:25:07,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 97 transitions, 689 flow [2023-11-17 12:25:07,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 97 transitions, 653 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 12:25:07,211 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 465 flow [2023-11-17 12:25:07,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=465, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-11-17 12:25:07,212 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-11-17 12:25:07,212 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 465 flow [2023-11-17 12:25:07,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:07,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:07,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:07,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:25:07,212 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 12:25:07,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1885500255, now seen corresponding path program 5 times [2023-11-17 12:25:07,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:07,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167060860] [2023-11-17 12:25:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:07,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167060860] [2023-11-17 12:25:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167060860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:07,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:07,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 12:25:07,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789849615] [2023-11-17 12:25:07,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:07,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:25:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:25:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:25:07,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 64 [2023-11-17 12:25:07,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 465 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:07,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:07,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 64 [2023-11-17 12:25:07,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:07,981 INFO L124 PetriNetUnfolderBase]: 616/971 cut-off events. [2023-11-17 12:25:07,982 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2023-11-17 12:25:07,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 971 events. 616/971 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3712 event pairs, 131 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 3830. Up to 743 conditions per place. [2023-11-17 12:25:07,988 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 87 selfloop transitions, 25 changer transitions 3/115 dead transitions. [2023-11-17 12:25:07,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 115 transitions, 870 flow [2023-11-17 12:25:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:25:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:25:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2023-11-17 12:25:07,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2986111111111111 [2023-11-17 12:25:07,990 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 172 transitions. [2023-11-17 12:25:07,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 172 transitions. [2023-11-17 12:25:07,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:07,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 172 transitions. [2023-11-17 12:25:07,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:07,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:07,991 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 64.0) internal successors, (640), 10 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:07,992 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 465 flow. Second operand 9 states and 172 transitions. [2023-11-17 12:25:07,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 115 transitions, 870 flow [2023-11-17 12:25:07,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 115 transitions, 829 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-17 12:25:07,999 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 573 flow [2023-11-17 12:25:07,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=573, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2023-11-17 12:25:08,001 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2023-11-17 12:25:08,001 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 573 flow [2023-11-17 12:25:08,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:08,001 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 12:25:08,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 12:25:08,001 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 12:25:08,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:08,004 INFO L85 PathProgramCache]: Analyzing trace with hash -292679630, now seen corresponding path program 1 times [2023-11-17 12:25:08,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:08,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821242844] [2023-11-17 12:25:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:08,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:08,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821242844] [2023-11-17 12:25:08,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821242844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:08,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524600499] [2023-11-17 12:25:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:08,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:08,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:08,125 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 12:25:08,144 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 12:25:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:08,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:25:08,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:08,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524600499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:08,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:08,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 12:25:08,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597082226] [2023-11-17 12:25:08,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:08,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:25:08,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:08,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:25:08,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:25:08,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:25:08,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 573 flow. Second operand has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:08,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:25:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:08,623 INFO L124 PetriNetUnfolderBase]: 1097/1774 cut-off events. [2023-11-17 12:25:08,623 INFO L125 PetriNetUnfolderBase]: For 4163/4163 co-relation queries the response was YES. [2023-11-17 12:25:08,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7433 conditions, 1774 events. 1097/1774 cut-off events. For 4163/4163 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8014 event pairs, 533 based on Foata normal form. 44/1556 useless extension candidates. Maximal degree in co-relation 7169. Up to 971 conditions per place. [2023-11-17 12:25:08,634 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 141 selfloop transitions, 8 changer transitions 5/154 dead transitions. [2023-11-17 12:25:08,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 154 transitions, 1444 flow [2023-11-17 12:25:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:25:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:25:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2023-11-17 12:25:08,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 12:25:08,636 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 140 transitions. [2023-11-17 12:25:08,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 140 transitions. [2023-11-17 12:25:08,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:08,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 140 transitions. [2023-11-17 12:25:08,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,637 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,637 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 573 flow. Second operand 7 states and 140 transitions. [2023-11-17 12:25:08,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 154 transitions, 1444 flow [2023-11-17 12:25:08,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 154 transitions, 1272 flow, removed 48 selfloop flow, removed 5 redundant places. [2023-11-17 12:25:08,658 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 584 flow [2023-11-17 12:25:08,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=584, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2023-11-17 12:25:08,659 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2023-11-17 12:25:08,659 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 584 flow [2023-11-17 12:25:08,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:08,659 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 12:25:08,667 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 12:25:08,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:08,865 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 12:25:08,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:08,865 INFO L85 PathProgramCache]: Analyzing trace with hash -280093180, now seen corresponding path program 1 times [2023-11-17 12:25:08,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:08,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044306854] [2023-11-17 12:25:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:08,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:08,923 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 12:25:08,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044306854] [2023-11-17 12:25:08,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044306854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:08,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:25:08,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:25:08,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291305665] [2023-11-17 12:25:08,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:08,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:25:08,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:25:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:25:08,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:25:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 584 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:25:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:09,179 INFO L124 PetriNetUnfolderBase]: 1290/2099 cut-off events. [2023-11-17 12:25:09,180 INFO L125 PetriNetUnfolderBase]: For 4133/4133 co-relation queries the response was YES. [2023-11-17 12:25:09,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8478 conditions, 2099 events. 1290/2099 cut-off events. For 4133/4133 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10190 event pairs, 388 based on Foata normal form. 34/1771 useless extension candidates. Maximal degree in co-relation 7994. Up to 1016 conditions per place. [2023-11-17 12:25:09,191 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 71 selfloop transitions, 39 changer transitions 4/114 dead transitions. [2023-11-17 12:25:09,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 996 flow [2023-11-17 12:25:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:25:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:25:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2023-11-17 12:25:09,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41015625 [2023-11-17 12:25:09,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 105 transitions. [2023-11-17 12:25:09,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 105 transitions. [2023-11-17 12:25:09,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:09,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 105 transitions. [2023-11-17 12:25:09,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,194 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,194 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 584 flow. Second operand 4 states and 105 transitions. [2023-11-17 12:25:09,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 996 flow [2023-11-17 12:25:09,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 971 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-17 12:25:09,230 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 737 flow [2023-11-17 12:25:09,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=737, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2023-11-17 12:25:09,230 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 48 predicate places. [2023-11-17 12:25:09,230 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 737 flow [2023-11-17 12:25:09,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:09,231 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] [2023-11-17 12:25:09,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 12:25:09,231 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 12:25:09,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:09,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1485373075, now seen corresponding path program 1 times [2023-11-17 12:25:09,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:09,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16764118] [2023-11-17 12:25:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:09,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:09,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:09,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16764118] [2023-11-17 12:25:09,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16764118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:09,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094499566] [2023-11-17 12:25:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:09,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:09,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:09,329 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 12:25:09,335 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 12:25:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:09,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:25:09,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:09,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:25:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094499566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:25:09,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:25:09,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-17 12:25:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332880182] [2023-11-17 12:25:09,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:25:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:25:09,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:25:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:25:09,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:25:09,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 737 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:09,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:25:09,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:09,753 INFO L124 PetriNetUnfolderBase]: 1508/2417 cut-off events. [2023-11-17 12:25:09,753 INFO L125 PetriNetUnfolderBase]: For 7491/7491 co-relation queries the response was YES. [2023-11-17 12:25:09,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11296 conditions, 2417 events. 1508/2417 cut-off events. For 7491/7491 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11491 event pairs, 313 based on Foata normal form. 130/1995 useless extension candidates. Maximal degree in co-relation 11161. Up to 873 conditions per place. [2023-11-17 12:25:09,769 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 90 selfloop transitions, 9 changer transitions 23/122 dead transitions. [2023-11-17 12:25:09,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 1242 flow [2023-11-17 12:25:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:25:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:25:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-17 12:25:09,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43359375 [2023-11-17 12:25:09,771 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-17 12:25:09,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-17 12:25:09,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:09,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-17 12:25:09,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,772 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 737 flow. Second operand 4 states and 111 transitions. [2023-11-17 12:25:09,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 1242 flow [2023-11-17 12:25:09,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 122 transitions, 1073 flow, removed 78 selfloop flow, removed 7 redundant places. [2023-11-17 12:25:09,795 INFO L231 Difference]: Finished difference. Result has 78 places, 49 transitions, 339 flow [2023-11-17 12:25:09,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=78, PETRI_TRANSITIONS=49} [2023-11-17 12:25:09,795 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2023-11-17 12:25:09,795 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 49 transitions, 339 flow [2023-11-17 12:25:09,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:09,796 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] [2023-11-17 12:25:09,801 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 12:25:10,001 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,SelfDestructingSolverStorable10 [2023-11-17 12:25:10,001 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 12:25:10,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:10,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1663511703, now seen corresponding path program 2 times [2023-11-17 12:25:10,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:10,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268424994] [2023-11-17 12:25:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:10,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:10,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268424994] [2023-11-17 12:25:10,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268424994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392617522] [2023-11-17 12:25:10,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:25:10,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:10,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:10,394 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 12:25:10,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:25:10,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:25:10,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:10,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:25:10,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:10,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:10,630 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 12:25:10,631 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 12 [2023-11-17 12:25:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:25:10,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392617522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:10,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:10,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2023-11-17 12:25:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631858771] [2023-11-17 12:25:10,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:10,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:25:10,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:10,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:25:10,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:25:10,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:25:10,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 49 transitions, 339 flow. Second operand has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:10,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:10,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:25:10,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:11,181 INFO L124 PetriNetUnfolderBase]: 1749/2668 cut-off events. [2023-11-17 12:25:11,181 INFO L125 PetriNetUnfolderBase]: For 7479/7479 co-relation queries the response was YES. [2023-11-17 12:25:11,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12404 conditions, 2668 events. 1749/2668 cut-off events. For 7479/7479 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11770 event pairs, 284 based on Foata normal form. 0/2000 useless extension candidates. Maximal degree in co-relation 12379. Up to 1403 conditions per place. [2023-11-17 12:25:11,198 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 110 selfloop transitions, 35 changer transitions 0/145 dead transitions. [2023-11-17 12:25:11,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 145 transitions, 1199 flow [2023-11-17 12:25:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:25:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:25:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 245 transitions. [2023-11-17 12:25:11,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2552083333333333 [2023-11-17 12:25:11,200 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 245 transitions. [2023-11-17 12:25:11,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 245 transitions. [2023-11-17 12:25:11,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:11,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 245 transitions. [2023-11-17 12:25:11,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 16.333333333333332) internal successors, (245), 15 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:11,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 64.0) internal successors, (1024), 16 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:11,202 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 64.0) internal successors, (1024), 16 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:11,202 INFO L175 Difference]: Start difference. First operand has 78 places, 49 transitions, 339 flow. Second operand 15 states and 245 transitions. [2023-11-17 12:25:11,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 145 transitions, 1199 flow [2023-11-17 12:25:11,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 145 transitions, 1034 flow, removed 79 selfloop flow, removed 5 redundant places. [2023-11-17 12:25:11,210 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 575 flow [2023-11-17 12:25:11,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=575, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-11-17 12:25:11,211 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2023-11-17 12:25:11,211 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 575 flow [2023-11-17 12:25:11,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:11,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:11,211 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] [2023-11-17 12:25:11,220 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 12:25:11,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:11,420 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 12:25:11,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1168490451, now seen corresponding path program 3 times [2023-11-17 12:25:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:11,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849240097] [2023-11-17 12:25:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:11,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849240097] [2023-11-17 12:25:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849240097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875968791] [2023-11-17 12:25:11,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:25:11,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:11,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:11,895 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 12:25:11,919 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 12:25:12,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:25:12,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:12,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:25:12,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:25:12,242 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 12:25:12,323 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 12:25:12,323 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 10 [2023-11-17 12:25:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:12,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:12,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:25:12,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-17 12:25:12,456 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 24 treesize of output 18 [2023-11-17 12:25:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:12,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875968791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:12,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:12,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 12:25:12,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610854327] [2023-11-17 12:25:12,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:12,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:25:12,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:25:12,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:25:12,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:25:12,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 575 flow. Second operand has 25 states, 25 states have (on average 11.52) internal successors, (288), 25 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:12,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:12,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:25:12,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:15,754 INFO L124 PetriNetUnfolderBase]: 7556/11246 cut-off events. [2023-11-17 12:25:15,754 INFO L125 PetriNetUnfolderBase]: For 37489/37489 co-relation queries the response was YES. [2023-11-17 12:25:15,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50139 conditions, 11246 events. 7556/11246 cut-off events. For 37489/37489 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 64414 event pairs, 749 based on Foata normal form. 652/9817 useless extension candidates. Maximal degree in co-relation 50112. Up to 2886 conditions per place. [2023-11-17 12:25:15,824 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 420 selfloop transitions, 129 changer transitions 2/551 dead transitions. [2023-11-17 12:25:15,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 551 transitions, 5014 flow [2023-11-17 12:25:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:25:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:25:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 693 transitions. [2023-11-17 12:25:15,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.309375 [2023-11-17 12:25:15,827 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 693 transitions. [2023-11-17 12:25:15,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 693 transitions. [2023-11-17 12:25:15,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:15,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 693 transitions. [2023-11-17 12:25:15,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 19.8) internal successors, (693), 35 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:15,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 64.0) internal successors, (2304), 36 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:15,834 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 64.0) internal successors, (2304), 36 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:15,834 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 575 flow. Second operand 35 states and 693 transitions. [2023-11-17 12:25:15,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 551 transitions, 5014 flow [2023-11-17 12:25:15,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 551 transitions, 4790 flow, removed 106 selfloop flow, removed 3 redundant places. [2023-11-17 12:25:15,862 INFO L231 Difference]: Finished difference. Result has 135 places, 198 transitions, 2309 flow [2023-11-17 12:25:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2309, PETRI_PLACES=135, PETRI_TRANSITIONS=198} [2023-11-17 12:25:15,863 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-11-17 12:25:15,863 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 198 transitions, 2309 flow [2023-11-17 12:25:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.52) internal successors, (288), 25 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:15,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:15,863 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] [2023-11-17 12:25:15,870 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 12:25:16,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:16,068 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 12:25:16,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash 621537601, now seen corresponding path program 4 times [2023-11-17 12:25:16,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744894439] [2023-11-17 12:25:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:16,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:16,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:16,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744894439] [2023-11-17 12:25:16,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744894439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:16,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24802063] [2023-11-17 12:25:16,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:25:16,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:16,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:16,679 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 12:25:16,703 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 12:25:16,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:25:16,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:16,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:25:16,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:25:16,811 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 24 [2023-11-17 12:25:16,991 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 16 treesize of output 11 [2023-11-17 12:25:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:25:17,021 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 16 treesize of output 11 [2023-11-17 12:25:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:17,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:17,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:25:17,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-11-17 12:25:17,195 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 64 treesize of output 58 [2023-11-17 12:25:17,198 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 58 treesize of output 46 [2023-11-17 12:25:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:17,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24802063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:17,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:17,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-11-17 12:25:17,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840502743] [2023-11-17 12:25:17,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:17,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:25:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:25:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=587, Unknown=7, NotChecked=0, Total=702 [2023-11-17 12:25:17,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:25:17,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 198 transitions, 2309 flow. Second operand has 27 states, 27 states have (on average 11.25925925925926) internal successors, (304), 27 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:17,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:17,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:25:17,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:21,009 INFO L124 PetriNetUnfolderBase]: 11485/17105 cut-off events. [2023-11-17 12:25:21,009 INFO L125 PetriNetUnfolderBase]: For 284305/284305 co-relation queries the response was YES. [2023-11-17 12:25:21,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113300 conditions, 17105 events. 11485/17105 cut-off events. For 284305/284305 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 102948 event pairs, 1213 based on Foata normal form. 246/15405 useless extension candidates. Maximal degree in co-relation 113247. Up to 5785 conditions per place. [2023-11-17 12:25:21,166 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 364 selfloop transitions, 180 changer transitions 0/544 dead transitions. [2023-11-17 12:25:21,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 544 transitions, 6774 flow [2023-11-17 12:25:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:25:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:25:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 462 transitions. [2023-11-17 12:25:21,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28875 [2023-11-17 12:25:21,168 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 462 transitions. [2023-11-17 12:25:21,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 462 transitions. [2023-11-17 12:25:21,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:21,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 462 transitions. [2023-11-17 12:25:21,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 18.48) internal successors, (462), 25 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:21,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 64.0) internal successors, (1664), 26 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:21,173 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 64.0) internal successors, (1664), 26 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:21,173 INFO L175 Difference]: Start difference. First operand has 135 places, 198 transitions, 2309 flow. Second operand 25 states and 462 transitions. [2023-11-17 12:25:21,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 544 transitions, 6774 flow [2023-11-17 12:25:21,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 544 transitions, 6098 flow, removed 324 selfloop flow, removed 8 redundant places. [2023-11-17 12:25:21,869 INFO L231 Difference]: Finished difference. Result has 161 places, 299 transitions, 3974 flow [2023-11-17 12:25:21,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3974, PETRI_PLACES=161, PETRI_TRANSITIONS=299} [2023-11-17 12:25:21,869 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 129 predicate places. [2023-11-17 12:25:21,869 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 299 transitions, 3974 flow [2023-11-17 12:25:21,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 11.25925925925926) internal successors, (304), 27 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:21,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:21,870 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:21,877 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 12:25:22,074 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,SelfDestructingSolverStorable13 [2023-11-17 12:25:22,074 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 12:25:22,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:22,074 INFO L85 PathProgramCache]: Analyzing trace with hash -262757184, now seen corresponding path program 5 times [2023-11-17 12:25:22,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:22,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499859460] [2023-11-17 12:25:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:22,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:22,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499859460] [2023-11-17 12:25:22,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499859460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140648017] [2023-11-17 12:25:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:25:22,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:22,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:22,836 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 12:25:22,856 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 12:25:22,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:25:22,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:22,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:25:22,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:23,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:25:23,068 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 12:25:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:23,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:23,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:25:23,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-17 12:25:23,163 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 24 treesize of output 18 [2023-11-17 12:25:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:25:23,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140648017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:23,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:23,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 21 [2023-11-17 12:25:23,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4785274] [2023-11-17 12:25:23,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:23,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:25:23,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:25:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:25:23,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:25:23,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 299 transitions, 3974 flow. Second operand has 22 states, 22 states have (on average 11.909090909090908) internal successors, (262), 22 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:23,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:23,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:25:23,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:26,427 INFO L124 PetriNetUnfolderBase]: 12158/18132 cut-off events. [2023-11-17 12:25:26,427 INFO L125 PetriNetUnfolderBase]: For 369449/369449 co-relation queries the response was YES. [2023-11-17 12:25:26,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125508 conditions, 18132 events. 12158/18132 cut-off events. For 369449/369449 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 109039 event pairs, 2222 based on Foata normal form. 33/16860 useless extension candidates. Maximal degree in co-relation 125449. Up to 9352 conditions per place. [2023-11-17 12:25:26,594 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 247 selfloop transitions, 183 changer transitions 0/430 dead transitions. [2023-11-17 12:25:26,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 430 transitions, 6001 flow [2023-11-17 12:25:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:25:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:25:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 236 transitions. [2023-11-17 12:25:26,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26339285714285715 [2023-11-17 12:25:26,596 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 236 transitions. [2023-11-17 12:25:26,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 236 transitions. [2023-11-17 12:25:26,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:26,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 236 transitions. [2023-11-17 12:25:26,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 16.857142857142858) internal successors, (236), 14 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:26,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:26,598 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:26,598 INFO L175 Difference]: Start difference. First operand has 161 places, 299 transitions, 3974 flow. Second operand 14 states and 236 transitions. [2023-11-17 12:25:26,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 430 transitions, 6001 flow [2023-11-17 12:25:28,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 430 transitions, 5774 flow, removed 84 selfloop flow, removed 10 redundant places. [2023-11-17 12:25:28,227 INFO L231 Difference]: Finished difference. Result has 167 places, 322 transitions, 4676 flow [2023-11-17 12:25:28,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4676, PETRI_PLACES=167, PETRI_TRANSITIONS=322} [2023-11-17 12:25:28,228 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 135 predicate places. [2023-11-17 12:25:28,228 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 322 transitions, 4676 flow [2023-11-17 12:25:28,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.909090909090908) internal successors, (262), 22 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:28,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:28,228 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:28,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 12:25:28,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 12:25:28,433 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 12:25:28,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:28,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1116539214, now seen corresponding path program 6 times [2023-11-17 12:25:28,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:28,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51284885] [2023-11-17 12:25:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:28,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:29,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:29,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51284885] [2023-11-17 12:25:29,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51284885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:29,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231496952] [2023-11-17 12:25:29,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:25:29,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:29,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:29,244 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 12:25:29,247 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 12:25:29,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:25:29,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:29,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:25:29,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:29,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:25:29,701 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 12:25:29,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:25:29,730 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 12:25:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:25:29,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:29,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:25:29,857 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 85 treesize of output 77 [2023-11-17 12:25:29,860 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 64 treesize of output 52 [2023-11-17 12:25:29,866 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 52 treesize of output 46 [2023-11-17 12:25:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:25:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231496952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:29,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:29,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 24 [2023-11-17 12:25:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729841946] [2023-11-17 12:25:29,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:29,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:25:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:25:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=519, Unknown=3, NotChecked=0, Total=600 [2023-11-17 12:25:29,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:25:29,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 322 transitions, 4676 flow. Second operand has 25 states, 25 states have (on average 11.56) internal successors, (289), 25 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:29,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:29,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:25:29,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:33,290 INFO L124 PetriNetUnfolderBase]: 12364/18457 cut-off events. [2023-11-17 12:25:33,291 INFO L125 PetriNetUnfolderBase]: For 388092/388092 co-relation queries the response was YES. [2023-11-17 12:25:33,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132243 conditions, 18457 events. 12364/18457 cut-off events. For 388092/388092 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 111063 event pairs, 1516 based on Foata normal form. 38/17153 useless extension candidates. Maximal degree in co-relation 132181. Up to 8424 conditions per place. [2023-11-17 12:25:33,448 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 253 selfloop transitions, 190 changer transitions 0/443 dead transitions. [2023-11-17 12:25:33,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 443 transitions, 6529 flow [2023-11-17 12:25:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:25:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:25:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 233 transitions. [2023-11-17 12:25:33,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26004464285714285 [2023-11-17 12:25:33,449 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 233 transitions. [2023-11-17 12:25:33,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 233 transitions. [2023-11-17 12:25:33,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:33,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 233 transitions. [2023-11-17 12:25:33,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 16.642857142857142) internal successors, (233), 14 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:33,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:33,452 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:33,452 INFO L175 Difference]: Start difference. First operand has 167 places, 322 transitions, 4676 flow. Second operand 14 states and 233 transitions. [2023-11-17 12:25:33,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 443 transitions, 6529 flow [2023-11-17 12:25:35,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 443 transitions, 6343 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-11-17 12:25:35,174 INFO L231 Difference]: Finished difference. Result has 172 places, 331 transitions, 5005 flow [2023-11-17 12:25:35,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=4454, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5005, PETRI_PLACES=172, PETRI_TRANSITIONS=331} [2023-11-17 12:25:35,175 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 140 predicate places. [2023-11-17 12:25:35,175 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 331 transitions, 5005 flow [2023-11-17 12:25:35,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.56) internal successors, (289), 25 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:35,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:35,175 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] [2023-11-17 12:25:35,183 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 12:25:35,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:35,376 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 12:25:35,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:35,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2090673281, now seen corresponding path program 1 times [2023-11-17 12:25:35,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:35,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608408803] [2023-11-17 12:25:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:35,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:25:35,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608408803] [2023-11-17 12:25:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608408803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489622747] [2023-11-17 12:25:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:35,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:35,473 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 12:25:35,498 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 12:25:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:35,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:25:35,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:25:35,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:25:35,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489622747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:35,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 12:25:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038148589] [2023-11-17 12:25:35,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:35,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:25:35,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:25:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:25:35,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-17 12:25:35,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 331 transitions, 5005 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:35,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:35,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-17 12:25:35,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:39,372 INFO L124 PetriNetUnfolderBase]: 16896/25503 cut-off events. [2023-11-17 12:25:39,372 INFO L125 PetriNetUnfolderBase]: For 569201/569201 co-relation queries the response was YES. [2023-11-17 12:25:39,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178752 conditions, 25503 events. 16896/25503 cut-off events. For 569201/569201 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 163701 event pairs, 7969 based on Foata normal form. 912/24685 useless extension candidates. Maximal degree in co-relation 178693. Up to 18453 conditions per place. [2023-11-17 12:25:39,638 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 324 selfloop transitions, 8 changer transitions 231/563 dead transitions. [2023-11-17 12:25:39,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 563 transitions, 9102 flow [2023-11-17 12:25:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:25:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:25:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2023-11-17 12:25:39,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229166666666667 [2023-11-17 12:25:39,639 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 124 transitions. [2023-11-17 12:25:39,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 124 transitions. [2023-11-17 12:25:39,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:39,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 124 transitions. [2023-11-17 12:25:39,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:39,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:39,640 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:39,640 INFO L175 Difference]: Start difference. First operand has 172 places, 331 transitions, 5005 flow. Second operand 6 states and 124 transitions. [2023-11-17 12:25:39,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 563 transitions, 9102 flow [2023-11-17 12:25:42,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 563 transitions, 9031 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-17 12:25:42,531 INFO L231 Difference]: Finished difference. Result has 173 places, 332 transitions, 5057 flow [2023-11-17 12:25:42,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5057, PETRI_PLACES=173, PETRI_TRANSITIONS=332} [2023-11-17 12:25:42,531 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 141 predicate places. [2023-11-17 12:25:42,531 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 332 transitions, 5057 flow [2023-11-17 12:25:42,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:42,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:42,532 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] [2023-11-17 12:25:42,536 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 12:25:42,732 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,SelfDestructingSolverStorable16 [2023-11-17 12:25:42,732 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 12:25:42,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:42,737 INFO L85 PathProgramCache]: Analyzing trace with hash -829002415, now seen corresponding path program 2 times [2023-11-17 12:25:42,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:42,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125168087] [2023-11-17 12:25:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:42,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:25:43,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:43,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125168087] [2023-11-17 12:25:43,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125168087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:43,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726056768] [2023-11-17 12:25:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:25:43,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:43,079 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 12:25:43,107 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 12:25:43,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:25:43,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:43,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:25:43,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:25:43,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:43,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:25:43,554 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 12:25:43,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:25:43,678 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 29 treesize of output 21 [2023-11-17 12:25:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:25:43,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726056768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:43,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:43,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 28 [2023-11-17 12:25:43,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885971495] [2023-11-17 12:25:43,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:43,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:25:43,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:25:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:25:43,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:25:43,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 332 transitions, 5057 flow. Second operand has 29 states, 29 states have (on average 11.655172413793103) internal successors, (338), 29 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:43,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:43,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:25:43,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:02,833 INFO L124 PetriNetUnfolderBase]: 62249/93709 cut-off events. [2023-11-17 12:26:02,834 INFO L125 PetriNetUnfolderBase]: For 2196431/2196431 co-relation queries the response was YES. [2023-11-17 12:26:03,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706327 conditions, 93709 events. 62249/93709 cut-off events. For 2196431/2196431 co-relation queries the response was YES. Maximal size of possible extension queue 3785. Compared 732824 event pairs, 4683 based on Foata normal form. 0/86924 useless extension candidates. Maximal degree in co-relation 706264. Up to 21100 conditions per place. [2023-11-17 12:26:04,244 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 1882 selfloop transitions, 1327 changer transitions 6/3215 dead transitions. [2023-11-17 12:26:04,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 3215 transitions, 52847 flow [2023-11-17 12:26:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-17 12:26:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-11-17 12:26:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 1166 transitions. [2023-11-17 12:26:04,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3087923728813559 [2023-11-17 12:26:04,246 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 1166 transitions. [2023-11-17 12:26:04,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 1166 transitions. [2023-11-17 12:26:04,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:04,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 1166 transitions. [2023-11-17 12:26:04,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 19.76271186440678) internal successors, (1166), 59 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:04,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 64.0) internal successors, (3840), 60 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:04,252 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 64.0) internal successors, (3840), 60 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:04,252 INFO L175 Difference]: Start difference. First operand has 173 places, 332 transitions, 5057 flow. Second operand 59 states and 1166 transitions. [2023-11-17 12:26:04,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 3215 transitions, 52847 flow [2023-11-17 12:26:31,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 3215 transitions, 52304 flow, removed 265 selfloop flow, removed 4 redundant places. [2023-11-17 12:26:31,298 INFO L231 Difference]: Finished difference. Result has 251 places, 1697 transitions, 33098 flow [2023-11-17 12:26:31,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=4968, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=33098, PETRI_PLACES=251, PETRI_TRANSITIONS=1697} [2023-11-17 12:26:31,299 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 219 predicate places. [2023-11-17 12:26:31,299 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 1697 transitions, 33098 flow [2023-11-17 12:26:31,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.655172413793103) internal successors, (338), 29 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:31,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:31,299 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] [2023-11-17 12:26:31,304 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 12:26:31,500 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,SelfDestructingSolverStorable17 [2023-11-17 12:26:31,500 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 12:26:31,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:31,500 INFO L85 PathProgramCache]: Analyzing trace with hash 164518365, now seen corresponding path program 3 times [2023-11-17 12:26:31,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:31,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606618877] [2023-11-17 12:26:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:31,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:26:31,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:31,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606618877] [2023-11-17 12:26:31,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606618877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:31,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261596887] [2023-11-17 12:26:31,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:26:31,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:31,808 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 12:26:31,812 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 12:26:31,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:26:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:31,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:26:31,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:26:32,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:32,496 INFO L349 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2023-11-17 12:26:32,497 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 45 treesize of output 82 [2023-11-17 12:26:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:26:32,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261596887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:32,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:32,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2023-11-17 12:26:32,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938090863] [2023-11-17 12:26:32,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:32,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:26:32,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:26:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:26:32,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:26:32,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 1697 transitions, 33098 flow. Second operand has 28 states, 28 states have (on average 11.714285714285714) internal successors, (328), 28 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:32,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:32,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:26:32,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:35,823 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 12:26:37,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:26:39,831 WARN L539 Checker$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 12:26:41,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:26:44,240 WARN L539 Checker$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 12:26:46,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:26:48,245 WARN L539 Checker$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 12:26:50,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:26:52,346 WARN L539 Checker$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 12:26:54,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:26:56,353 WARN L539 Checker$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 12:26:58,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:27:01,418 WARN L539 Checker$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 12:27:03,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:27:05,700 WARN L539 Checker$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 12:27:07,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:27:09,710 WARN L539 Checker$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 12:27:11,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:27:15,187 WARN L539 Checker$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 12:27:17,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:27:19,967 WARN L539 Checker$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 12:27:21,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:27:23,973 WARN L539 Checker$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 12:28:05,591 INFO L124 PetriNetUnfolderBase]: 84181/126197 cut-off events. [2023-11-17 12:28:05,592 INFO L125 PetriNetUnfolderBase]: For 4890380/4890380 co-relation queries the response was YES. [2023-11-17 12:28:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204027 conditions, 126197 events. 84181/126197 cut-off events. For 4890380/4890380 co-relation queries the response was YES. Maximal size of possible extension queue 5262. Compared 1018233 event pairs, 14141 based on Foata normal form. 1876/121422 useless extension candidates. Maximal degree in co-relation 1203940. Up to 76503 conditions per place. [2023-11-17 12:28:08,529 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 2247 selfloop transitions, 1202 changer transitions 268/3717 dead transitions. [2023-11-17 12:28:08,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 3717 transitions, 78737 flow [2023-11-17 12:28:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-17 12:28:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-17 12:28:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1010 transitions. [2023-11-17 12:28:08,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29224537037037035 [2023-11-17 12:28:08,540 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 1010 transitions. [2023-11-17 12:28:08,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 1010 transitions. [2023-11-17 12:28:08,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:08,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 1010 transitions. [2023-11-17 12:28:08,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 18.703703703703702) internal successors, (1010), 54 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:08,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 64.0) internal successors, (3520), 55 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:08,545 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 64.0) internal successors, (3520), 55 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:08,545 INFO L175 Difference]: Start difference. First operand has 251 places, 1697 transitions, 33098 flow. Second operand 54 states and 1010 transitions. [2023-11-17 12:28:08,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 3717 transitions, 78737 flow [2023-11-17 12:31:01,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 3717 transitions, 73551 flow, removed 2542 selfloop flow, removed 7 redundant places. [2023-11-17 12:31:01,494 INFO L231 Difference]: Finished difference. Result has 324 places, 2674 transitions, 54712 flow [2023-11-17 12:31:01,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=28523, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=54712, PETRI_PLACES=324, PETRI_TRANSITIONS=2674} [2023-11-17 12:31:01,495 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 292 predicate places. [2023-11-17 12:31:01,495 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 2674 transitions, 54712 flow [2023-11-17 12:31:01,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.714285714285714) internal successors, (328), 28 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:01,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:01,496 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] [2023-11-17 12:31:01,501 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 12:31:01,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:01,698 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 12:31:01,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1048841209, now seen corresponding path program 4 times [2023-11-17 12:31:01,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:01,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532841486] [2023-11-17 12:31:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:01,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532841486] [2023-11-17 12:31:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532841486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184867112] [2023-11-17 12:31:02,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:31:02,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:02,902 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 12:31:02,903 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 12:31:03,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:31:03,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:31:03,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-17 12:31:03,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:03,055 WARN L561 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2023-11-17 12:31:03,056 WARN L561 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2023-11-17 12:31:03,069 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-17 12:31:03,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2023-11-17 12:31:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,082 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-17 12:31:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,088 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-17 12:31:03,089 WARN L561 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2023-11-17 12:31:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,096 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:31:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,104 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:31:03,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,127 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,127 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-17 12:31:03,128 WARN L561 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2023-11-17 12:31:03,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,135 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:31:03,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,148 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-17 12:31:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,155 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-17 12:31:03,156 WARN L561 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2023-11-17 12:31:03,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,168 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,169 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-17 12:31:03,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,183 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-17 12:31:03,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:31:03,195 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-17 12:31:03,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-17 12:31:03,295 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:31:03,296 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 12:31:03,751 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-17 12:31:03,752 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 27 treesize of output 29 [2023-11-17 12:31:03,760 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 7 treesize of output 3 [2023-11-17 12:31:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:03,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:04,444 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2023-11-17 12:31:04,445 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 76 treesize of output 109 [2023-11-17 12:31:04,452 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 24 treesize of output 18 [2023-11-17 12:31:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:05,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184867112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:05,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:05,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-11-17 12:31:05,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943322580] [2023-11-17 12:31:05,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:05,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 12:31:05,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:05,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 12:31:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2023-11-17 12:31:05,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 64 [2023-11-17 12:31:05,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 2674 transitions, 54712 flow. Second operand has 44 states, 44 states have (on average 10.795454545454545) internal successors, (475), 44 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:05,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:05,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 64 [2023-11-17 12:31:05,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand