/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-max-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:22:44,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:22:44,429 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 12:22:44,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:22:44,464 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:22:44,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:22:44,465 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:22:44,466 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:22:44,466 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:22:44,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:22:44,471 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:22:44,471 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:22:44,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:22:44,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:22:44,473 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:22:44,473 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:22:44,473 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:22:44,473 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:22:44,474 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:22:44,474 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:22:44,474 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:22:44,475 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:22:44,475 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:22:44,475 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:22:44,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:22:44,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:22:44,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:22:44,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:22:44,477 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:22:44,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:22:44,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:22:44,479 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:22:44,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:22:44,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:22:44,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:22:44,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:22:44,770 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:22:44,771 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:22:44,772 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-11-17 12:22:45,916 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:22:46,102 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:22:46,109 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array-hom.wvr.c [2023-11-17 12:22:46,117 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804204248/ea68cccb499f4d72b87e629240046210/FLAG524992e46 [2023-11-17 12:22:46,138 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804204248/ea68cccb499f4d72b87e629240046210 [2023-11-17 12:22:46,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:22:46,142 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:22:46,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:22:46,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:22:46,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:22:46,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c3f6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46, skipping insertion in model container [2023-11-17 12:22:46,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,179 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:22:46,372 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-max-array-hom.wvr.c[2625,2638] [2023-11-17 12:22:46,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:22:46,398 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:22:46,440 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-max-array-hom.wvr.c[2625,2638] [2023-11-17 12:22:46,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:22:46,450 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:22:46,450 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:22:46,459 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:22:46,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46 WrapperNode [2023-11-17 12:22:46,460 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:22:46,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:22:46,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:22:46,462 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:22:46,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,487 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,513 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-11-17 12:22:46,513 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:22:46,514 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:22:46,514 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:22:46,514 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:22:46,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,531 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,531 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,537 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,541 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:22:46,565 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:22:46,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:22:46,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:22:46,566 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (1/1) ... [2023-11-17 12:22:46,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:22:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:46,598 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 12:22:46,614 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 12:22:46,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:22:46,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:22:46,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:22:46,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:22:46,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:22:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:22:46,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:22:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:22:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:22:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:22:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:22:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:22:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:22:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:22:46,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:22:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:22:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:22:46,642 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 12:22:46,770 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:22:46,773 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:22:47,031 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:22:47,316 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:22:47,316 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 12:22:47,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:22:47 BoogieIcfgContainer [2023-11-17 12:22:47,318 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:22:47,320 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:22:47,320 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:22:47,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:22:47,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:22:46" (1/3) ... [2023-11-17 12:22:47,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd11f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:22:47, skipping insertion in model container [2023-11-17 12:22:47,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:22:46" (2/3) ... [2023-11-17 12:22:47,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd11f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:22:47, skipping insertion in model container [2023-11-17 12:22:47,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:22:47" (3/3) ... [2023-11-17 12:22:47,327 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2023-11-17 12:22:47,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:22:47,345 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:22:47,345 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:22:47,403 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 12:22:47,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2023-11-17 12:22:47,482 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-11-17 12:22:47,482 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:22:47,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-17 12:22:47,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2023-11-17 12:22:47,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2023-11-17 12:22:47,496 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:22:47,515 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 37 places, 31 transitions, 80 flow [2023-11-17 12:22:47,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 37 places, 31 transitions, 80 flow [2023-11-17 12:22:47,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 80 flow [2023-11-17 12:22:47,538 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2023-11-17 12:22:47,538 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:22:47,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 31 events. 4/31 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-17 12:22:47,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 300 [2023-11-17 12:22:48,166 INFO L134 LiptonReduction]: Checked pairs total: 371 [2023-11-17 12:22:48,167 INFO L136 LiptonReduction]: Total number of compositions: 7 [2023-11-17 12:22:48,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:22:48,186 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;@61987fba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:22:48,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 12:22:48,193 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:22:48,194 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-17 12:22:48,194 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:22:48,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:48,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:22:48,195 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 12:22:48,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2145703011, now seen corresponding path program 1 times [2023-11-17 12:22:48,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:48,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308999431] [2023-11-17 12:22:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:48,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:48,667 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 12:22:48,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308999431] [2023-11-17 12:22:48,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308999431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:22:48,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:22:48,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:22:48,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74101671] [2023-11-17 12:22:48,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:22:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:22:48,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:22:48,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:22:48,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2023-11-17 12:22:48,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:48,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:48,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2023-11-17 12:22:48,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:48,916 INFO L124 PetriNetUnfolderBase]: 429/632 cut-off events. [2023-11-17 12:22:48,916 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-17 12:22:48,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 632 events. 429/632 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1999 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-17 12:22:48,927 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 38 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2023-11-17 12:22:48,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 205 flow [2023-11-17 12:22:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:22:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:22:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-17 12:22:48,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2023-11-17 12:22:48,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-17 12:22:48,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-17 12:22:48,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:48,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-17 12:22:48,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:48,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:48,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:48,955 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 65 transitions. [2023-11-17 12:22:48,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 205 flow [2023-11-17 12:22:48,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 183 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 12:22:48,964 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-17 12:22:48,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-17 12:22:48,970 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-17 12:22:48,971 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-17 12:22:48,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:48,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:48,972 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 12:22:48,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:22:48,972 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 12:22:48,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1840661634, now seen corresponding path program 1 times [2023-11-17 12:22:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:48,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964019934] [2023-11-17 12:22:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:49,145 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 12:22:49,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:49,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964019934] [2023-11-17 12:22:49,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964019934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:22:49,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:22:49,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:22:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467975317] [2023-11-17 12:22:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:22:49,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:22:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:22:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:22:49,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 42 [2023-11-17 12:22:49,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:49,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 42 [2023-11-17 12:22:49,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:49,250 INFO L124 PetriNetUnfolderBase]: 429/633 cut-off events. [2023-11-17 12:22:49,250 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-11-17 12:22:49,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 633 events. 429/633 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1875 event pairs, 276 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 544. Up to 633 conditions per place. [2023-11-17 12:22:49,254 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-17 12:22:49,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 138 flow [2023-11-17 12:22:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:22:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:22:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2023-11-17 12:22:49,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2023-11-17 12:22:49,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 41 transitions. [2023-11-17 12:22:49,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 41 transitions. [2023-11-17 12:22:49,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:49,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 41 transitions. [2023-11-17 12:22:49,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,260 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 3 states and 41 transitions. [2023-11-17 12:22:49,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 138 flow [2023-11-17 12:22:49,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:22:49,262 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 88 flow [2023-11-17 12:22:49,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=76, 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=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-17 12:22:49,264 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-11-17 12:22:49,264 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 88 flow [2023-11-17 12:22:49,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:49,266 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 12:22:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:22:49,269 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 12:22:49,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1389490811, now seen corresponding path program 1 times [2023-11-17 12:22:49,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:49,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318870479] [2023-11-17 12:22:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:49,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:49,385 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 12:22:49,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:49,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318870479] [2023-11-17 12:22:49,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318870479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:22:49,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:22:49,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:22:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511984924] [2023-11-17 12:22:49,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:22:49,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:22:49,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:49,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:22:49,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:22:49,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:22:49,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:49,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:22:49,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:49,491 INFO L124 PetriNetUnfolderBase]: 424/625 cut-off events. [2023-11-17 12:22:49,491 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-11-17 12:22:49,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 625 events. 424/625 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1923 event pairs, 186 based on Foata normal form. 50/674 useless extension candidates. Maximal degree in co-relation 1460. Up to 459 conditions per place. [2023-11-17 12:22:49,495 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 38 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-11-17 12:22:49,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 212 flow [2023-11-17 12:22:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:22:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:22:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2023-11-17 12:22:49,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31547619047619047 [2023-11-17 12:22:49,496 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 53 transitions. [2023-11-17 12:22:49,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 53 transitions. [2023-11-17 12:22:49,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:49,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 53 transitions. [2023-11-17 12:22:49,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,498 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,498 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 88 flow. Second operand 4 states and 53 transitions. [2023-11-17 12:22:49,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 212 flow [2023-11-17 12:22:49,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 206 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 12:22:49,500 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 101 flow [2023-11-17 12:22:49,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-17 12:22:49,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-17 12:22:49,501 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 101 flow [2023-11-17 12:22:49,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:49,501 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 12:22:49,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:22:49,502 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 12:22:49,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:49,502 INFO L85 PathProgramCache]: Analyzing trace with hash 91596736, now seen corresponding path program 1 times [2023-11-17 12:22:49,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:49,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166715177] [2023-11-17 12:22:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:49,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:22:49,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166715177] [2023-11-17 12:22:49,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166715177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918992479] [2023-11-17 12:22:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:49,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:49,597 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 12:22:49,623 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 12:22:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:49,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:22:49,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:22:49,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:22:49,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918992479] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:49,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:22:49,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-17 12:22:49,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278449131] [2023-11-17 12:22:49,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:22:49,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:22:49,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:22:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:22:49,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 42 [2023-11-17 12:22:49,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:49,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 42 [2023-11-17 12:22:49,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:49,953 INFO L124 PetriNetUnfolderBase]: 410/599 cut-off events. [2023-11-17 12:22:49,954 INFO L125 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2023-11-17 12:22:49,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 599 events. 410/599 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1807 event pairs, 183 based on Foata normal form. 44/643 useless extension candidates. Maximal degree in co-relation 1603. Up to 452 conditions per place. [2023-11-17 12:22:49,957 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 39 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-17 12:22:49,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 246 flow [2023-11-17 12:22:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:22:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:22:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2023-11-17 12:22:49,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3 [2023-11-17 12:22:49,959 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 63 transitions. [2023-11-17 12:22:49,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 63 transitions. [2023-11-17 12:22:49,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:49,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 63 transitions. [2023-11-17 12:22:49,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,962 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,962 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 101 flow. Second operand 5 states and 63 transitions. [2023-11-17 12:22:49,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 246 flow [2023-11-17 12:22:49,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 230 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 12:22:49,966 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 113 flow [2023-11-17 12:22:49,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-17 12:22:49,968 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-17 12:22:49,968 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 113 flow [2023-11-17 12:22:49,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:49,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:49,968 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 12:22:49,983 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 12:22:50,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:50,175 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 12:22:50,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1443212299, now seen corresponding path program 1 times [2023-11-17 12:22:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:50,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452552126] [2023-11-17 12:22:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:51,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452552126] [2023-11-17 12:22:51,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452552126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067045859] [2023-11-17 12:22:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:51,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:51,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:51,457 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 12:22:51,481 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 12:22:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:51,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:22:51,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:51,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:22:51,631 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 39 treesize of output 37 [2023-11-17 12:22:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:22:51,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-17 12:22:52,060 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 36 treesize of output 27 [2023-11-17 12:22:52,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-11-17 12:22:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:52,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:52,726 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~max2~0 1)) (.cse2 (= c_~max1~0 c_~max2~0)) (.cse4 (+ c_~max3~0 1)) (.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (and (= c_~max1~0 c_~max3~0) (<= .cse0 c_~max3~0)) (forall ((v_ArrVal_113 (Array Int Int))) (< c_~max3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse1))) (and .cse2 (<= c_~max3~0 c_~max2~0))) (forall ((v_ArrVal_113 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse1))) (or (< .cse3 .cse0) (< .cse3 .cse4) (= c_~max1~0 .cse3)))) (or .cse2 (and (forall ((v_ArrVal_113 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse1))) (or (< c_~max2~0 .cse5) (< .cse5 .cse4)))) (forall ((v_ArrVal_113 (Array Int Int))) (let ((.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse1))) (or (< .cse6 .cse4) (= c_~max1~0 .cse6)))))))) is different from false [2023-11-17 12:22:52,887 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~max2~0 1)) (.cse4 (+ c_~max3~0 1)) (.cse2 (+ c_~A~0.offset (* 4 c_~M~0))) (.cse1 (= c_~max1~0 c_~max2~0))) (and (or (and (= c_~max1~0 c_~max3~0) (<= .cse0 c_~max3~0)) (and .cse1 (<= c_~max3~0 c_~max2~0)) (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (< c_~max3~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse2)))) (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse3 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse2))) (or (< .cse3 .cse4) (< .cse3 .cse0) (= c_~max1~0 .cse3)))) (or (and (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse2))) (or (< c_~max2~0 .cse5) (< .cse5 .cse4)))) (forall ((v_ArrVal_113 (Array Int Int)) (v_ArrVal_112 (Array Int Int))) (let ((.cse6 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_112) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_113) c_~A~0.base) .cse2))) (or (< .cse6 .cse4) (= c_~max1~0 .cse6))))) .cse1))) is different from false [2023-11-17 12:22:52,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:22:52,952 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 1048 treesize of output 928 [2023-11-17 12:22:52,984 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 514 treesize of output 502 [2023-11-17 12:22:52,998 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 502 treesize of output 478 [2023-11-17 12:22:53,019 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 478 treesize of output 466 [2023-11-17 12:22:53,034 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 466 treesize of output 442 [2023-11-17 12:22:53,050 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 442 treesize of output 424 [2023-11-17 12:22:53,067 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 424 treesize of output 388 [2023-11-17 12:22:53,080 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 388 treesize of output 382 [2023-11-17 12:22:53,093 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 382 treesize of output 370 [2023-11-17 12:22:53,102 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 12:22:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-17 12:22:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067045859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:22:53,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:22:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-11-17 12:22:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854562513] [2023-11-17 12:22:53,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:22:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:22:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:22:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=449, Unknown=2, NotChecked=90, Total=650 [2023-11-17 12:22:53,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:22:53,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 113 flow. Second operand has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 26 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:53,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:53,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:22:53,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:54,528 INFO L124 PetriNetUnfolderBase]: 747/1095 cut-off events. [2023-11-17 12:22:54,528 INFO L125 PetriNetUnfolderBase]: For 582/582 co-relation queries the response was YES. [2023-11-17 12:22:54,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3135 conditions, 1095 events. 747/1095 cut-off events. For 582/582 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3934 event pairs, 58 based on Foata normal form. 1/1094 useless extension candidates. Maximal degree in co-relation 2257. Up to 647 conditions per place. [2023-11-17 12:22:54,536 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 23 changer transitions 1/104 dead transitions. [2023-11-17 12:22:54,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 104 transitions, 550 flow [2023-11-17 12:22:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:22:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:22:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2023-11-17 12:22:54,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404761904761905 [2023-11-17 12:22:54,541 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 143 transitions. [2023-11-17 12:22:54,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 143 transitions. [2023-11-17 12:22:54,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:54,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 143 transitions. [2023-11-17 12:22:54,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:54,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 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 12:22:54,546 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 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 12:22:54,546 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 113 flow. Second operand 10 states and 143 transitions. [2023-11-17 12:22:54,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 104 transitions, 550 flow [2023-11-17 12:22:54,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 534 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 12:22:54,552 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 262 flow [2023-11-17 12:22:54,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=262, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-11-17 12:22:54,555 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2023-11-17 12:22:54,555 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 262 flow [2023-11-17 12:22:54,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 26 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:54,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:54,555 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 12:22:54,564 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 12:22:54,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:54,763 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 12:22:54,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash 88646219, now seen corresponding path program 2 times [2023-11-17 12:22:54,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:54,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937001256] [2023-11-17 12:22:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:54,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:55,272 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 12:22:55,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:55,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937001256] [2023-11-17 12:22:55,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937001256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457938432] [2023-11-17 12:22:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:22:55,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:55,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:55,274 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 12:22:55,301 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 12:22:55,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:22:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:22:55,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:22:55,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:55,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-17 12:22:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:55,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:55,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:22:55,993 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 131 treesize of output 75 [2023-11-17 12:22:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:56,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457938432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:22:56,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:22:56,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-11-17 12:22:56,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850710550] [2023-11-17 12:22:56,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:22:56,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:22:56,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:56,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:22:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:22:56,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:22:56,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 262 flow. Second operand has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:56,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:56,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:22:56,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:57,016 INFO L124 PetriNetUnfolderBase]: 899/1328 cut-off events. [2023-11-17 12:22:57,016 INFO L125 PetriNetUnfolderBase]: For 1565/1565 co-relation queries the response was YES. [2023-11-17 12:22:57,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4434 conditions, 1328 events. 899/1328 cut-off events. For 1565/1565 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4929 event pairs, 130 based on Foata normal form. 15/1342 useless extension candidates. Maximal degree in co-relation 3626. Up to 980 conditions per place. [2023-11-17 12:22:57,027 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 50 changer transitions 1/135 dead transitions. [2023-11-17 12:22:57,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 135 transitions, 884 flow [2023-11-17 12:22:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:22:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:22:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 195 transitions. [2023-11-17 12:22:57,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25793650793650796 [2023-11-17 12:22:57,030 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 195 transitions. [2023-11-17 12:22:57,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 195 transitions. [2023-11-17 12:22:57,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:57,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 195 transitions. [2023-11-17 12:22:57,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 10.833333333333334) internal successors, (195), 18 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:57,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 42.0) internal successors, (798), 19 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:57,034 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 42.0) internal successors, (798), 19 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:57,034 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 262 flow. Second operand 18 states and 195 transitions. [2023-11-17 12:22:57,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 135 transitions, 884 flow [2023-11-17 12:22:57,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 135 transitions, 828 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-17 12:22:57,043 INFO L231 Difference]: Finished difference. Result has 68 places, 89 transitions, 606 flow [2023-11-17 12:22:57,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=606, PETRI_PLACES=68, PETRI_TRANSITIONS=89} [2023-11-17 12:22:57,045 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2023-11-17 12:22:57,045 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 89 transitions, 606 flow [2023-11-17 12:22:57,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:57,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:57,047 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 12:22:57,055 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 12:22:57,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:57,254 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 12:22:57,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash 539867229, now seen corresponding path program 3 times [2023-11-17 12:22:57,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:57,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900993400] [2023-11-17 12:22:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:57,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:57,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900993400] [2023-11-17 12:22:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900993400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796635819] [2023-11-17 12:22:57,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:22:57,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:57,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:57,857 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 12:22:57,881 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 12:22:57,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:22:57,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:22:57,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:22:57,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:58,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-17 12:22:58,305 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 12:22:58,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:58,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:22:58,487 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 123 treesize of output 75 [2023-11-17 12:22:58,871 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 12:22:58,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796635819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:22:58,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:22:58,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-11-17 12:22:58,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962126977] [2023-11-17 12:22:58,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:22:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:22:58,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:58,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:22:58,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:22:58,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:22:58,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 89 transitions, 606 flow. Second operand has 22 states, 22 states have (on average 7.0) internal successors, (154), 22 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:58,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:58,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:22:58,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:59,481 INFO L124 PetriNetUnfolderBase]: 1067/1571 cut-off events. [2023-11-17 12:22:59,481 INFO L125 PetriNetUnfolderBase]: For 3347/3347 co-relation queries the response was YES. [2023-11-17 12:22:59,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6237 conditions, 1571 events. 1067/1571 cut-off events. For 3347/3347 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6070 event pairs, 179 based on Foata normal form. 1/1572 useless extension candidates. Maximal degree in co-relation 5231. Up to 1223 conditions per place. [2023-11-17 12:22:59,494 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 68 changer transitions 1/174 dead transitions. [2023-11-17 12:22:59,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 174 transitions, 1398 flow [2023-11-17 12:22:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:22:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:22:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 175 transitions. [2023-11-17 12:22:59,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2777777777777778 [2023-11-17 12:22:59,496 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 175 transitions. [2023-11-17 12:22:59,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 175 transitions. [2023-11-17 12:22:59,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:59,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 175 transitions. [2023-11-17 12:22:59,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.666666666666666) internal successors, (175), 15 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:59,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 42.0) internal successors, (672), 16 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:59,499 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 42.0) internal successors, (672), 16 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:59,499 INFO L175 Difference]: Start difference. First operand has 68 places, 89 transitions, 606 flow. Second operand 15 states and 175 transitions. [2023-11-17 12:22:59,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 174 transitions, 1398 flow [2023-11-17 12:22:59,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 174 transitions, 1329 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-11-17 12:22:59,517 INFO L231 Difference]: Finished difference. Result has 88 places, 124 transitions, 1055 flow [2023-11-17 12:22:59,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1055, PETRI_PLACES=88, PETRI_TRANSITIONS=124} [2023-11-17 12:22:59,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2023-11-17 12:22:59,518 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 124 transitions, 1055 flow [2023-11-17 12:22:59,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.0) internal successors, (154), 22 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:59,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:59,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:22:59,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 12:22:59,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:59,725 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 12:22:59,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:59,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1718839311, now seen corresponding path program 4 times [2023-11-17 12:22:59,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:59,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843159428] [2023-11-17 12:22:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:59,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:00,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:00,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843159428] [2023-11-17 12:23:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843159428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406193823] [2023-11-17 12:23:00,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:23:00,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:00,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:00,167 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 12:23:00,191 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 12:23:00,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:23:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:00,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:23:00,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:00,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-17 12:23:00,579 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 12:23:00,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:00,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:23:00,741 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 131 treesize of output 75 [2023-11-17 12:23:01,111 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 12:23:01,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406193823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:01,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:01,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-17 12:23:01,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394520127] [2023-11-17 12:23:01,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:01,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:23:01,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:23:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:23:01,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:01,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 124 transitions, 1055 flow. Second operand has 23 states, 23 states have (on average 6.695652173913044) internal successors, (154), 23 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:01,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:01,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:01,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:01,756 INFO L124 PetriNetUnfolderBase]: 1176/1737 cut-off events. [2023-11-17 12:23:01,757 INFO L125 PetriNetUnfolderBase]: For 4535/4535 co-relation queries the response was YES. [2023-11-17 12:23:01,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7571 conditions, 1737 events. 1176/1737 cut-off events. For 4535/4535 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6948 event pairs, 180 based on Foata normal form. 1/1726 useless extension candidates. Maximal degree in co-relation 6789. Up to 1346 conditions per place. [2023-11-17 12:23:01,772 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 84 changer transitions 1/201 dead transitions. [2023-11-17 12:23:01,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 201 transitions, 1806 flow [2023-11-17 12:23:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:23:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:23:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 212 transitions. [2023-11-17 12:23:01,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2656641604010025 [2023-11-17 12:23:01,774 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 212 transitions. [2023-11-17 12:23:01,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 212 transitions. [2023-11-17 12:23:01,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:01,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 212 transitions. [2023-11-17 12:23:01,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 11.157894736842104) internal successors, (212), 19 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:01,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 42.0) internal successors, (840), 20 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:01,776 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 42.0) internal successors, (840), 20 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:01,777 INFO L175 Difference]: Start difference. First operand has 88 places, 124 transitions, 1055 flow. Second operand 19 states and 212 transitions. [2023-11-17 12:23:01,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 201 transitions, 1806 flow [2023-11-17 12:23:01,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 201 transitions, 1756 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-17 12:23:01,798 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1390 flow [2023-11-17 12:23:01,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1390, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2023-11-17 12:23:01,800 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2023-11-17 12:23:01,800 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1390 flow [2023-11-17 12:23:01,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.695652173913044) internal successors, (154), 23 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:01,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:01,800 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 12:23:01,812 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 12:23:02,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:02,007 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 12:23:02,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:02,007 INFO L85 PathProgramCache]: Analyzing trace with hash 10831109, now seen corresponding path program 5 times [2023-11-17 12:23:02,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:02,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841298914] [2023-11-17 12:23:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:02,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841298914] [2023-11-17 12:23:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841298914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065918934] [2023-11-17 12:23:02,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:23:02,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:02,480 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 12:23:02,492 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 12:23:02,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:23:02,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:02,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:23:02,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:02,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-11-17 12:23:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:02,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:03,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:23:03,115 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 123 treesize of output 75 [2023-11-17 12:23:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:03,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065918934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:03,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:03,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:23:03,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536278738] [2023-11-17 12:23:03,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:03,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:23:03,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:03,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:23:03,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:23:03,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:03,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1390 flow. Second operand has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:03,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:03,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:03,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:04,415 INFO L124 PetriNetUnfolderBase]: 1583/2308 cut-off events. [2023-11-17 12:23:04,416 INFO L125 PetriNetUnfolderBase]: For 8521/8521 co-relation queries the response was YES. [2023-11-17 12:23:04,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10595 conditions, 2308 events. 1583/2308 cut-off events. For 8521/8521 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9440 event pairs, 210 based on Foata normal form. 2/2298 useless extension candidates. Maximal degree in co-relation 10281. Up to 1669 conditions per place. [2023-11-17 12:23:04,439 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 85 changer transitions 2/229 dead transitions. [2023-11-17 12:23:04,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 229 transitions, 2349 flow [2023-11-17 12:23:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:23:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:23:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 190 transitions. [2023-11-17 12:23:04,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30158730158730157 [2023-11-17 12:23:04,441 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 190 transitions. [2023-11-17 12:23:04,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 190 transitions. [2023-11-17 12:23:04,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:04,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 190 transitions. [2023-11-17 12:23:04,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 12.666666666666666) internal successors, (190), 15 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:04,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 42.0) internal successors, (672), 16 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:04,443 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 42.0) internal successors, (672), 16 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:04,443 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1390 flow. Second operand 15 states and 190 transitions. [2023-11-17 12:23:04,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 229 transitions, 2349 flow [2023-11-17 12:23:04,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 229 transitions, 2240 flow, removed 27 selfloop flow, removed 7 redundant places. [2023-11-17 12:23:04,474 INFO L231 Difference]: Finished difference. Result has 120 places, 170 transitions, 1851 flow [2023-11-17 12:23:04,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1851, PETRI_PLACES=120, PETRI_TRANSITIONS=170} [2023-11-17 12:23:04,475 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2023-11-17 12:23:04,475 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 170 transitions, 1851 flow [2023-11-17 12:23:04,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:04,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:04,476 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 12:23:04,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:04,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:04,682 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 12:23:04,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash -631393091, now seen corresponding path program 6 times [2023-11-17 12:23:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516913973] [2023-11-17 12:23:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:05,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:05,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516913973] [2023-11-17 12:23:05,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516913973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:05,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316230350] [2023-11-17 12:23:05,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:23:05,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:05,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:05,121 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 12:23:05,141 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 12:23:05,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:23:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:05,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:23:05,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:05,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-11-17 12:23:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:05,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:05,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:23:05,678 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 107 treesize of output 75 [2023-11-17 12:23:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:06,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316230350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:06,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:06,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:23:06,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299420866] [2023-11-17 12:23:06,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:06,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:23:06,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:23:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:23:06,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:06,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 170 transitions, 1851 flow. Second operand has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:06,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:06,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:06,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:06,617 INFO L124 PetriNetUnfolderBase]: 1690/2470 cut-off events. [2023-11-17 12:23:06,618 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-11-17 12:23:06,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12623 conditions, 2470 events. 1690/2470 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10361 event pairs, 282 based on Foata normal form. 1/2459 useless extension candidates. Maximal degree in co-relation 12070. Up to 2031 conditions per place. [2023-11-17 12:23:06,650 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 75 changer transitions 1/210 dead transitions. [2023-11-17 12:23:06,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 210 transitions, 2511 flow [2023-11-17 12:23:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:23:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:23:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2023-11-17 12:23:06,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2976190476190476 [2023-11-17 12:23:06,652 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 125 transitions. [2023-11-17 12:23:06,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 125 transitions. [2023-11-17 12:23:06,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:06,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 125 transitions. [2023-11-17 12:23:06,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:06,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 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 12:23:06,653 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 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 12:23:06,654 INFO L175 Difference]: Start difference. First operand has 120 places, 170 transitions, 1851 flow. Second operand 10 states and 125 transitions. [2023-11-17 12:23:06,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 210 transitions, 2511 flow [2023-11-17 12:23:06,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 210 transitions, 2252 flow, removed 111 selfloop flow, removed 5 redundant places. [2023-11-17 12:23:06,693 INFO L231 Difference]: Finished difference. Result has 127 places, 180 transitions, 1926 flow [2023-11-17 12:23:06,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1926, PETRI_PLACES=127, PETRI_TRANSITIONS=180} [2023-11-17 12:23:06,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-11-17 12:23:06,694 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 180 transitions, 1926 flow [2023-11-17 12:23:06,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:06,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:06,695 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] [2023-11-17 12:23:06,701 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 12:23:06,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:06,902 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 12:23:06,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 469486166, now seen corresponding path program 7 times [2023-11-17 12:23:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:06,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111288453] [2023-11-17 12:23:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:06,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:07,004 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 12:23:07,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:07,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111288453] [2023-11-17 12:23:07,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111288453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:07,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606892602] [2023-11-17 12:23:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:23:07,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:07,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:07,006 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 12:23:07,023 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 12:23:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:07,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:23:07,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:07,164 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 12:23:07,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:23:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606892602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:07,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:07,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:23:07,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181782565] [2023-11-17 12:23:07,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:07,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:23:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:23:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:23:07,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 42 [2023-11-17 12:23:07,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 180 transitions, 1926 flow. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:07,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:07,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 42 [2023-11-17 12:23:07,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:07,696 INFO L124 PetriNetUnfolderBase]: 2032/2966 cut-off events. [2023-11-17 12:23:07,697 INFO L125 PetriNetUnfolderBase]: For 15794/15794 co-relation queries the response was YES. [2023-11-17 12:23:07,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15062 conditions, 2966 events. 2032/2966 cut-off events. For 15794/15794 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12941 event pairs, 621 based on Foata normal form. 48/3002 useless extension candidates. Maximal degree in co-relation 14473. Up to 2132 conditions per place. [2023-11-17 12:23:07,725 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 209 selfloop transitions, 27 changer transitions 0/236 dead transitions. [2023-11-17 12:23:07,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 236 transitions, 2819 flow [2023-11-17 12:23:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:23:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:23:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2023-11-17 12:23:07,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2023-11-17 12:23:07,727 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 113 transitions. [2023-11-17 12:23:07,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 113 transitions. [2023-11-17 12:23:07,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:07,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 113 transitions. [2023-11-17 12:23:07,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:07,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:07,729 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 42.0) internal successors, (378), 9 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:07,729 INFO L175 Difference]: Start difference. First operand has 127 places, 180 transitions, 1926 flow. Second operand 8 states and 113 transitions. [2023-11-17 12:23:07,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 236 transitions, 2819 flow [2023-11-17 12:23:07,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 236 transitions, 2684 flow, removed 37 selfloop flow, removed 5 redundant places. [2023-11-17 12:23:07,786 INFO L231 Difference]: Finished difference. Result has 132 places, 186 transitions, 1971 flow [2023-11-17 12:23:07,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1971, PETRI_PLACES=132, PETRI_TRANSITIONS=186} [2023-11-17 12:23:07,787 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2023-11-17 12:23:07,788 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 186 transitions, 1971 flow [2023-11-17 12:23:07,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:07,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:07,788 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] [2023-11-17 12:23:07,797 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 12:23:07,994 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,SelfDestructingSolverStorable10 [2023-11-17 12:23:07,995 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 12:23:07,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:07,995 INFO L85 PathProgramCache]: Analyzing trace with hash 979730350, now seen corresponding path program 8 times [2023-11-17 12:23:07,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474356958] [2023-11-17 12:23:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:23:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:08,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474356958] [2023-11-17 12:23:08,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474356958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6337041] [2023-11-17 12:23:08,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:23:08,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:08,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:08,090 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 12:23:08,106 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 12:23:08,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:23:08,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:08,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:23:08,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:23:08,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:23:08,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6337041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:08,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:08,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:23:08,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623295472] [2023-11-17 12:23:08,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:08,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:23:08,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:23:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:23:08,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 42 [2023-11-17 12:23:08,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 186 transitions, 1971 flow. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 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 12:23:08,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:08,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 42 [2023-11-17 12:23:08,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:08,839 INFO L124 PetriNetUnfolderBase]: 1846/2760 cut-off events. [2023-11-17 12:23:08,839 INFO L125 PetriNetUnfolderBase]: For 16842/16842 co-relation queries the response was YES. [2023-11-17 12:23:08,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14011 conditions, 2760 events. 1846/2760 cut-off events. For 16842/16842 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12484 event pairs, 440 based on Foata normal form. 146/2894 useless extension candidates. Maximal degree in co-relation 13449. Up to 1150 conditions per place. [2023-11-17 12:23:08,863 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 221 selfloop transitions, 30 changer transitions 0/251 dead transitions. [2023-11-17 12:23:08,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 251 transitions, 2851 flow [2023-11-17 12:23:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:23:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:23:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2023-11-17 12:23:08,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2023-11-17 12:23:08,865 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 106 transitions. [2023-11-17 12:23:08,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 106 transitions. [2023-11-17 12:23:08,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:08,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 106 transitions. [2023-11-17 12:23:08,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:08,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:08,866 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:08,866 INFO L175 Difference]: Start difference. First operand has 132 places, 186 transitions, 1971 flow. Second operand 7 states and 106 transitions. [2023-11-17 12:23:08,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 251 transitions, 2851 flow [2023-11-17 12:23:08,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 251 transitions, 2810 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-11-17 12:23:08,915 INFO L231 Difference]: Finished difference. Result has 135 places, 175 transitions, 1902 flow [2023-11-17 12:23:08,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1902, PETRI_PLACES=135, PETRI_TRANSITIONS=175} [2023-11-17 12:23:08,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2023-11-17 12:23:08,916 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 175 transitions, 1902 flow [2023-11-17 12:23:08,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 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 12:23:08,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:08,917 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] [2023-11-17 12:23:08,926 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 12:23:09,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:09,123 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 12:23:09,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:09,123 INFO L85 PathProgramCache]: Analyzing trace with hash -385478319, now seen corresponding path program 9 times [2023-11-17 12:23:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:09,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415218017] [2023-11-17 12:23:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:09,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:09,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415218017] [2023-11-17 12:23:09,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415218017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:09,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352478183] [2023-11-17 12:23:09,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:23:09,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:09,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:09,233 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 12:23:09,245 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 12:23:09,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:23:09,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:09,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:23:09,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:09,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:09,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352478183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:09,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:09,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:23:09,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651392536] [2023-11-17 12:23:09,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:09,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:23:09,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:23:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:23:09,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:09,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 175 transitions, 1902 flow. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:09,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:09,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:09,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:09,925 INFO L124 PetriNetUnfolderBase]: 1412/2209 cut-off events. [2023-11-17 12:23:09,925 INFO L125 PetriNetUnfolderBase]: For 13548/13548 co-relation queries the response was YES. [2023-11-17 12:23:09,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11676 conditions, 2209 events. 1412/2209 cut-off events. For 13548/13548 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10238 event pairs, 450 based on Foata normal form. 166/2363 useless extension candidates. Maximal degree in co-relation 11607. Up to 834 conditions per place. [2023-11-17 12:23:09,942 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 166 selfloop transitions, 27 changer transitions 11/204 dead transitions. [2023-11-17 12:23:09,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 204 transitions, 2454 flow [2023-11-17 12:23:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:23:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:23:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2023-11-17 12:23:09,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2023-11-17 12:23:09,944 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 99 transitions. [2023-11-17 12:23:09,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 99 transitions. [2023-11-17 12:23:09,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:09,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 99 transitions. [2023-11-17 12:23:09,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:09,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:09,945 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 42.0) internal successors, (336), 8 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:09,945 INFO L175 Difference]: Start difference. First operand has 135 places, 175 transitions, 1902 flow. Second operand 7 states and 99 transitions. [2023-11-17 12:23:09,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 204 transitions, 2454 flow [2023-11-17 12:23:09,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 204 transitions, 2347 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-11-17 12:23:09,996 INFO L231 Difference]: Finished difference. Result has 133 places, 151 transitions, 1758 flow [2023-11-17 12:23:09,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1758, PETRI_PLACES=133, PETRI_TRANSITIONS=151} [2023-11-17 12:23:09,997 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2023-11-17 12:23:09,997 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 151 transitions, 1758 flow [2023-11-17 12:23:09,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:09,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:09,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:10,005 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 12:23:10,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 12:23:10,204 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 12:23:10,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1059135776, now seen corresponding path program 1 times [2023-11-17 12:23:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:10,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075488592] [2023-11-17 12:23:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:10,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:23:10,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:10,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075488592] [2023-11-17 12:23:10,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075488592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:10,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698171734] [2023-11-17 12:23:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:10,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:10,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:10,298 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 12:23:10,317 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 12:23:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:10,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:23:10,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:23:10,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:23:10,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698171734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:10,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:10,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 12:23:10,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060472940] [2023-11-17 12:23:10,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:10,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:23:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:10,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:23:10,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:23:10,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:10,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 151 transitions, 1758 flow. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:10,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:10,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:10,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:10,867 INFO L124 PetriNetUnfolderBase]: 1087/1763 cut-off events. [2023-11-17 12:23:10,867 INFO L125 PetriNetUnfolderBase]: For 12033/12033 co-relation queries the response was YES. [2023-11-17 12:23:10,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9632 conditions, 1763 events. 1087/1763 cut-off events. For 12033/12033 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8369 event pairs, 468 based on Foata normal form. 116/1879 useless extension candidates. Maximal degree in co-relation 9034. Up to 834 conditions per place. [2023-11-17 12:23:10,880 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 75 selfloop transitions, 3 changer transitions 84/162 dead transitions. [2023-11-17 12:23:10,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 162 transitions, 2110 flow [2023-11-17 12:23:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:23:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:23:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2023-11-17 12:23:10,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2023-11-17 12:23:10,882 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 82 transitions. [2023-11-17 12:23:10,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 82 transitions. [2023-11-17 12:23:10,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:10,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 82 transitions. [2023-11-17 12:23:10,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:10,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:10,886 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 42.0) internal successors, (294), 7 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:10,887 INFO L175 Difference]: Start difference. First operand has 133 places, 151 transitions, 1758 flow. Second operand 6 states and 82 transitions. [2023-11-17 12:23:10,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 162 transitions, 2110 flow [2023-11-17 12:23:10,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 162 transitions, 1975 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-11-17 12:23:10,925 INFO L231 Difference]: Finished difference. Result has 127 places, 78 transitions, 842 flow [2023-11-17 12:23:10,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=842, PETRI_PLACES=127, PETRI_TRANSITIONS=78} [2023-11-17 12:23:10,926 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-11-17 12:23:10,926 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 78 transitions, 842 flow [2023-11-17 12:23:10,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:10,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:10,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:10,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:11,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 12:23:11,133 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 12:23:11,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash 730719539, now seen corresponding path program 10 times [2023-11-17 12:23:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:11,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083130505] [2023-11-17 12:23:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:11,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:11,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:11,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083130505] [2023-11-17 12:23:11,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083130505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:11,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153929964] [2023-11-17 12:23:11,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:23:11,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:11,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:11,257 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:11,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:23:11,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:23:11,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:11,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:23:11,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:11,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153929964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:11,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:11,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-11-17 12:23:11,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969563920] [2023-11-17 12:23:11,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:11,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:23:11,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:23:11,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:23:11,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:11,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 78 transitions, 842 flow. Second operand has 17 states, 17 states have (on average 6.588235294117647) internal successors, (112), 17 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:11,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:11,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:11,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:12,263 INFO L124 PetriNetUnfolderBase]: 811/1173 cut-off events. [2023-11-17 12:23:12,263 INFO L125 PetriNetUnfolderBase]: For 9824/9824 co-relation queries the response was YES. [2023-11-17 12:23:12,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7596 conditions, 1173 events. 811/1173 cut-off events. For 9824/9824 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4172 event pairs, 106 based on Foata normal form. 14/1187 useless extension candidates. Maximal degree in co-relation 7553. Up to 485 conditions per place. [2023-11-17 12:23:12,287 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 81 changer transitions 0/199 dead transitions. [2023-11-17 12:23:12,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 199 transitions, 2366 flow [2023-11-17 12:23:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:23:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:23:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 208 transitions. [2023-11-17 12:23:12,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24761904761904763 [2023-11-17 12:23:12,289 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 208 transitions. [2023-11-17 12:23:12,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 208 transitions. [2023-11-17 12:23:12,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:12,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 208 transitions. [2023-11-17 12:23:12,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.4) internal successors, (208), 20 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:12,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 42.0) internal successors, (882), 21 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:12,291 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 42.0) internal successors, (882), 21 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:12,292 INFO L175 Difference]: Start difference. First operand has 127 places, 78 transitions, 842 flow. Second operand 20 states and 208 transitions. [2023-11-17 12:23:12,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 199 transitions, 2366 flow [2023-11-17 12:23:12,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 199 transitions, 1997 flow, removed 107 selfloop flow, removed 14 redundant places. [2023-11-17 12:23:12,343 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1527 flow [2023-11-17 12:23:12,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1527, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2023-11-17 12:23:12,344 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2023-11-17 12:23:12,344 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1527 flow [2023-11-17 12:23:12,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.588235294117647) internal successors, (112), 17 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:12,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:12,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:12,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 12:23:12,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 12:23:12,551 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 12:23:12,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:12,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2099375851, now seen corresponding path program 11 times [2023-11-17 12:23:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:12,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115282718] [2023-11-17 12:23:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:12,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:23:12,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115282718] [2023-11-17 12:23:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115282718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296777744] [2023-11-17 12:23:12,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:23:12,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:12,684 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:12,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:23:12,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:23:12,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:12,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:23:12,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:12,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:12,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296777744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:12,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:12,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2023-11-17 12:23:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900252177] [2023-11-17 12:23:12,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:12,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:23:12,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:12,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:23:12,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:23:12,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:12,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1527 flow. Second operand has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 21 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:12,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:12,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:12,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:14,332 INFO L124 PetriNetUnfolderBase]: 1479/2145 cut-off events. [2023-11-17 12:23:14,332 INFO L125 PetriNetUnfolderBase]: For 22589/22589 co-relation queries the response was YES. [2023-11-17 12:23:14,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14265 conditions, 2145 events. 1479/2145 cut-off events. For 22589/22589 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8277 event pairs, 226 based on Foata normal form. 54/2199 useless extension candidates. Maximal degree in co-relation 14220. Up to 1039 conditions per place. [2023-11-17 12:23:14,350 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 287 selfloop transitions, 177 changer transitions 0/464 dead transitions. [2023-11-17 12:23:14,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 464 transitions, 5533 flow [2023-11-17 12:23:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 12:23:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 12:23:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 443 transitions. [2023-11-17 12:23:14,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2572590011614402 [2023-11-17 12:23:14,352 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 443 transitions. [2023-11-17 12:23:14,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 443 transitions. [2023-11-17 12:23:14,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:14,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 443 transitions. [2023-11-17 12:23:14,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 10.804878048780488) internal successors, (443), 41 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:14,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 42.0) internal successors, (1764), 42 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:14,357 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 42.0) internal successors, (1764), 42 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:14,357 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1527 flow. Second operand 41 states and 443 transitions. [2023-11-17 12:23:14,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 464 transitions, 5533 flow [2023-11-17 12:23:14,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 464 transitions, 4812 flow, removed 276 selfloop flow, removed 8 redundant places. [2023-11-17 12:23:14,438 INFO L231 Difference]: Finished difference. Result has 162 places, 273 transitions, 3518 flow [2023-11-17 12:23:14,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3518, PETRI_PLACES=162, PETRI_TRANSITIONS=273} [2023-11-17 12:23:14,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2023-11-17 12:23:14,438 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 273 transitions, 3518 flow [2023-11-17 12:23:14,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 21 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:14,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:14,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:14,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:14,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:23:14,645 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 12:23:14,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash 531995381, now seen corresponding path program 12 times [2023-11-17 12:23:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:14,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193274904] [2023-11-17 12:23:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:23:14,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:14,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193274904] [2023-11-17 12:23:14,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193274904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:14,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130026960] [2023-11-17 12:23:14,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:23:14,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:14,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:14,751 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:14,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:23:14,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:23:14,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:14,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:23:14,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:23:14,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:23:15,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130026960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:15,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-17 12:23:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812670375] [2023-11-17 12:23:15,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:23:15,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:15,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:23:15,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:23:15,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:15,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 273 transitions, 3518 flow. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:15,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:15,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:15,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:15,660 INFO L124 PetriNetUnfolderBase]: 1619/2393 cut-off events. [2023-11-17 12:23:15,660 INFO L125 PetriNetUnfolderBase]: For 31127/31127 co-relation queries the response was YES. [2023-11-17 12:23:15,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17298 conditions, 2393 events. 1619/2393 cut-off events. For 31127/31127 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9821 event pairs, 310 based on Foata normal form. 34/2427 useless extension candidates. Maximal degree in co-relation 17236. Up to 1171 conditions per place. [2023-11-17 12:23:15,689 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 90 changer transitions 0/355 dead transitions. [2023-11-17 12:23:15,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 355 transitions, 5245 flow [2023-11-17 12:23:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:23:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:23:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2023-11-17 12:23:15,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26904761904761904 [2023-11-17 12:23:15,691 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 113 transitions. [2023-11-17 12:23:15,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 113 transitions. [2023-11-17 12:23:15,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:15,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 113 transitions. [2023-11-17 12:23:15,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:15,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 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 12:23:15,694 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 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 12:23:15,694 INFO L175 Difference]: Start difference. First operand has 162 places, 273 transitions, 3518 flow. Second operand 10 states and 113 transitions. [2023-11-17 12:23:15,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 355 transitions, 5245 flow [2023-11-17 12:23:15,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 355 transitions, 4340 flow, removed 411 selfloop flow, removed 7 redundant places. [2023-11-17 12:23:15,862 INFO L231 Difference]: Finished difference. Result has 167 places, 280 transitions, 3202 flow [2023-11-17 12:23:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3202, PETRI_PLACES=167, PETRI_TRANSITIONS=280} [2023-11-17 12:23:15,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2023-11-17 12:23:15,863 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 280 transitions, 3202 flow [2023-11-17 12:23:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:15,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:15,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:15,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:16,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:16,069 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 12:23:16,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash 922105827, now seen corresponding path program 13 times [2023-11-17 12:23:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:16,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32739765] [2023-11-17 12:23:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:16,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:16,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:16,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32739765] [2023-11-17 12:23:16,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32739765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:16,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854235635] [2023-11-17 12:23:16,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:23:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:16,241 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:16,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:23:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:16,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:23:16,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:16,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854235635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:16,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 12:23:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289315973] [2023-11-17 12:23:16,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:16,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:23:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:23:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:23:16,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:16,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 280 transitions, 3202 flow. Second operand has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:16,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:16,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:16,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:17,310 INFO L124 PetriNetUnfolderBase]: 2270/3364 cut-off events. [2023-11-17 12:23:17,310 INFO L125 PetriNetUnfolderBase]: For 39879/39879 co-relation queries the response was YES. [2023-11-17 12:23:17,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22638 conditions, 3364 events. 2270/3364 cut-off events. For 39879/39879 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14888 event pairs, 357 based on Foata normal form. 22/3386 useless extension candidates. Maximal degree in co-relation 22575. Up to 1568 conditions per place. [2023-11-17 12:23:17,342 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 106 changer transitions 0/418 dead transitions. [2023-11-17 12:23:17,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 418 transitions, 5516 flow [2023-11-17 12:23:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:23:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:23:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2023-11-17 12:23:17,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26666666666666666 [2023-11-17 12:23:17,344 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 112 transitions. [2023-11-17 12:23:17,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 112 transitions. [2023-11-17 12:23:17,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:17,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 112 transitions. [2023-11-17 12:23:17,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:17,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 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 12:23:17,346 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 42.0) internal successors, (462), 11 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 12:23:17,346 INFO L175 Difference]: Start difference. First operand has 167 places, 280 transitions, 3202 flow. Second operand 10 states and 112 transitions. [2023-11-17 12:23:17,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 418 transitions, 5516 flow [2023-11-17 12:23:17,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 418 transitions, 5225 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-11-17 12:23:17,547 INFO L231 Difference]: Finished difference. Result has 171 places, 308 transitions, 3663 flow [2023-11-17 12:23:17,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3663, PETRI_PLACES=171, PETRI_TRANSITIONS=308} [2023-11-17 12:23:17,548 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2023-11-17 12:23:17,548 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 308 transitions, 3663 flow [2023-11-17 12:23:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:17,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:17,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:17,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:17,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 12:23:17,755 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 12:23:17,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:17,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1681550473, now seen corresponding path program 14 times [2023-11-17 12:23:17,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:17,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908908197] [2023-11-17 12:23:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:17,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:17,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:17,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908908197] [2023-11-17 12:23:17,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908908197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:17,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355447595] [2023-11-17 12:23:17,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:23:17,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:17,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:17,871 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:17,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 12:23:18,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:23:18,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:18,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:23:18,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:18,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:18,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355447595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:18,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:18,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 12:23:18,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279289650] [2023-11-17 12:23:18,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:18,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:23:18,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:18,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:23:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:23:18,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:18,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 308 transitions, 3663 flow. Second operand has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:18,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:18,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:18,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:19,229 INFO L124 PetriNetUnfolderBase]: 3000/4410 cut-off events. [2023-11-17 12:23:19,229 INFO L125 PetriNetUnfolderBase]: For 54633/54633 co-relation queries the response was YES. [2023-11-17 12:23:19,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30693 conditions, 4410 events. 3000/4410 cut-off events. For 54633/54633 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20246 event pairs, 363 based on Foata normal form. 28/4438 useless extension candidates. Maximal degree in co-relation 30629. Up to 1845 conditions per place. [2023-11-17 12:23:19,267 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 397 selfloop transitions, 206 changer transitions 0/603 dead transitions. [2023-11-17 12:23:19,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 603 transitions, 8114 flow [2023-11-17 12:23:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:23:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:23:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 238 transitions. [2023-11-17 12:23:19,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2982456140350877 [2023-11-17 12:23:19,269 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 238 transitions. [2023-11-17 12:23:19,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 238 transitions. [2023-11-17 12:23:19,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:19,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 238 transitions. [2023-11-17 12:23:19,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.526315789473685) internal successors, (238), 19 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:19,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 42.0) internal successors, (840), 20 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:19,271 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 42.0) internal successors, (840), 20 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:19,271 INFO L175 Difference]: Start difference. First operand has 171 places, 308 transitions, 3663 flow. Second operand 19 states and 238 transitions. [2023-11-17 12:23:19,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 603 transitions, 8114 flow [2023-11-17 12:23:19,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 603 transitions, 7858 flow, removed 66 selfloop flow, removed 6 redundant places. [2023-11-17 12:23:19,564 INFO L231 Difference]: Finished difference. Result has 188 places, 388 transitions, 5220 flow [2023-11-17 12:23:19,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5220, PETRI_PLACES=188, PETRI_TRANSITIONS=388} [2023-11-17 12:23:19,565 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2023-11-17 12:23:19,565 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 388 transitions, 5220 flow [2023-11-17 12:23:19,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.05) internal successors, (121), 20 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:19,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:19,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:19,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-17 12:23:19,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:19,769 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 12:23:19,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:19,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1811977393, now seen corresponding path program 15 times [2023-11-17 12:23:19,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:19,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157287537] [2023-11-17 12:23:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:19,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:19,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:19,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157287537] [2023-11-17 12:23:19,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157287537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:19,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710365381] [2023-11-17 12:23:19,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:23:19,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:19,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:19,885 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:19,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 12:23:20,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:23:20,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:20,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:23:20,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:20,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:20,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710365381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:20,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:20,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-17 12:23:20,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701567143] [2023-11-17 12:23:20,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:20,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:23:20,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:20,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:23:20,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:23:20,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:20,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 388 transitions, 5220 flow. Second operand has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 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 12:23:20,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:20,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:20,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:21,221 INFO L124 PetriNetUnfolderBase]: 2961/4319 cut-off events. [2023-11-17 12:23:21,221 INFO L125 PetriNetUnfolderBase]: For 60085/60085 co-relation queries the response was YES. [2023-11-17 12:23:21,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31708 conditions, 4319 events. 2961/4319 cut-off events. For 60085/60085 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19510 event pairs, 365 based on Foata normal form. 32/4351 useless extension candidates. Maximal degree in co-relation 31639. Up to 1835 conditions per place. [2023-11-17 12:23:21,261 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 377 selfloop transitions, 197 changer transitions 0/574 dead transitions. [2023-11-17 12:23:21,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 574 transitions, 8302 flow [2023-11-17 12:23:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:23:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:23:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 210 transitions. [2023-11-17 12:23:21,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2023-11-17 12:23:21,263 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 210 transitions. [2023-11-17 12:23:21,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 210 transitions. [2023-11-17 12:23:21,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:21,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 210 transitions. [2023-11-17 12:23:21,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 12.352941176470589) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:21,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 42.0) internal successors, (756), 18 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:21,265 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 42.0) internal successors, (756), 18 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:21,265 INFO L175 Difference]: Start difference. First operand has 188 places, 388 transitions, 5220 flow. Second operand 17 states and 210 transitions. [2023-11-17 12:23:21,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 574 transitions, 8302 flow [2023-11-17 12:23:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 574 transitions, 7738 flow, removed 173 selfloop flow, removed 8 redundant places. [2023-11-17 12:23:21,603 INFO L231 Difference]: Finished difference. Result has 195 places, 382 transitions, 4943 flow [2023-11-17 12:23:21,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4943, PETRI_PLACES=195, PETRI_TRANSITIONS=382} [2023-11-17 12:23:21,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2023-11-17 12:23:21,603 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 382 transitions, 4943 flow [2023-11-17 12:23:21,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 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 12:23:21,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:21,604 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:21,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:21,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:21,805 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 12:23:21,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash -181572189, now seen corresponding path program 16 times [2023-11-17 12:23:21,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:21,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293178145] [2023-11-17 12:23:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:21,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:21,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293178145] [2023-11-17 12:23:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293178145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912395003] [2023-11-17 12:23:21,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:23:21,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:21,997 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:22,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 12:23:22,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:23:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:22,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:23:22,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:22,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:22,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912395003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:22,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:22,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-17 12:23:22,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459343367] [2023-11-17 12:23:22,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:22,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:23:22,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:23:22,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:23:22,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:22,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 382 transitions, 4943 flow. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:22,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:22,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:22,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:23,891 INFO L124 PetriNetUnfolderBase]: 3027/4423 cut-off events. [2023-11-17 12:23:23,891 INFO L125 PetriNetUnfolderBase]: For 55783/55783 co-relation queries the response was YES. [2023-11-17 12:23:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31610 conditions, 4423 events. 3027/4423 cut-off events. For 55783/55783 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 20065 event pairs, 465 based on Foata normal form. 28/4451 useless extension candidates. Maximal degree in co-relation 31541. Up to 1915 conditions per place. [2023-11-17 12:23:23,937 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 289 changer transitions 0/623 dead transitions. [2023-11-17 12:23:23,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 623 transitions, 8931 flow [2023-11-17 12:23:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:23:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:23:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 351 transitions. [2023-11-17 12:23:23,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23877551020408164 [2023-11-17 12:23:23,939 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 351 transitions. [2023-11-17 12:23:23,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 351 transitions. [2023-11-17 12:23:23,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:23,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 351 transitions. [2023-11-17 12:23:23,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 10.028571428571428) internal successors, (351), 35 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:23,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 42.0) internal successors, (1512), 36 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:23,943 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 42.0) internal successors, (1512), 36 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:23,943 INFO L175 Difference]: Start difference. First operand has 195 places, 382 transitions, 4943 flow. Second operand 35 states and 351 transitions. [2023-11-17 12:23:23,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 623 transitions, 8931 flow [2023-11-17 12:23:24,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 623 transitions, 8309 flow, removed 30 selfloop flow, removed 17 redundant places. [2023-11-17 12:23:24,231 INFO L231 Difference]: Finished difference. Result has 221 places, 465 transitions, 6518 flow [2023-11-17 12:23:24,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6518, PETRI_PLACES=221, PETRI_TRANSITIONS=465} [2023-11-17 12:23:24,232 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2023-11-17 12:23:24,232 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 465 transitions, 6518 flow [2023-11-17 12:23:24,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:24,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:24,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:24,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:24,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:24,433 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 12:23:24,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1959741185, now seen corresponding path program 17 times [2023-11-17 12:23:24,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:24,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856074170] [2023-11-17 12:23:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:24,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:24,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856074170] [2023-11-17 12:23:24,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856074170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:24,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902033036] [2023-11-17 12:23:24,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:23:24,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:24,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:24,549 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:24,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 12:23:24,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:23:24,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:24,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:23:24,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:24,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:23:24,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902033036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:24,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:24,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-17 12:23:24,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070498606] [2023-11-17 12:23:24,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:24,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:23:24,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:23:24,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:23:24,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2023-11-17 12:23:24,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 465 transitions, 6518 flow. Second operand has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:24,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:24,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2023-11-17 12:23:24,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:26,171 INFO L124 PetriNetUnfolderBase]: 2999/4361 cut-off events. [2023-11-17 12:23:26,172 INFO L125 PetriNetUnfolderBase]: For 58257/58257 co-relation queries the response was YES. [2023-11-17 12:23:26,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32246 conditions, 4361 events. 2999/4361 cut-off events. For 58257/58257 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19511 event pairs, 469 based on Foata normal form. 22/4383 useless extension candidates. Maximal degree in co-relation 32169. Up to 1907 conditions per place. [2023-11-17 12:23:26,218 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 279 changer transitions 0/584 dead transitions. [2023-11-17 12:23:26,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 584 transitions, 8708 flow [2023-11-17 12:23:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:23:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:23:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 271 transitions. [2023-11-17 12:23:26,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24816849816849818 [2023-11-17 12:23:26,219 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 271 transitions. [2023-11-17 12:23:26,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 271 transitions. [2023-11-17 12:23:26,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:26,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 271 transitions. [2023-11-17 12:23:26,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 10.423076923076923) internal successors, (271), 26 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:26,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 42.0) internal successors, (1134), 27 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:26,222 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 42.0) internal successors, (1134), 27 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:26,222 INFO L175 Difference]: Start difference. First operand has 221 places, 465 transitions, 6518 flow. Second operand 26 states and 271 transitions. [2023-11-17 12:23:26,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 584 transitions, 8708 flow [2023-11-17 12:23:26,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 584 transitions, 7890 flow, removed 277 selfloop flow, removed 17 redundant places. [2023-11-17 12:23:26,619 INFO L231 Difference]: Finished difference. Result has 226 places, 458 transitions, 6143 flow [2023-11-17 12:23:26,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5585, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6143, PETRI_PLACES=226, PETRI_TRANSITIONS=458} [2023-11-17 12:23:26,620 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2023-11-17 12:23:26,620 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 458 transitions, 6143 flow [2023-11-17 12:23:26,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2105263157894735) internal successors, (118), 19 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:26,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:26,620 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] [2023-11-17 12:23:26,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:26,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:26,821 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 12:23:26,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:26,822 INFO L85 PathProgramCache]: Analyzing trace with hash -306643214, now seen corresponding path program 2 times [2023-11-17 12:23:26,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:26,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951211937] [2023-11-17 12:23:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:26,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:28,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:28,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951211937] [2023-11-17 12:23:28,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951211937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:28,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989926863] [2023-11-17 12:23:28,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:23:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:28,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:28,511 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:28,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 12:23:28,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:23:28,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:28,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 12:23:28,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:28,638 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 84 treesize of output 82 [2023-11-17 12:23:29,324 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 121 treesize of output 90 [2023-11-17 12:23:29,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:23:29,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 91 [2023-11-17 12:23:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:30,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:30,668 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~max3~0 1)) (.cse3 (= c_~max1~0 c_~max2~0)) (.cse2 (+ c_~max2~0 1))) (and (forall ((v_ArrVal_734 (Array Int Int)) (v_thread3Thread1of1ForFork1_~i~2_98 Int)) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_734) c_~A~0.base) (+ c_~A~0.offset (* v_thread3Thread1of1ForFork1_~i~2_98 4))))) (or (= c_~max1~0 .cse0) (< (+ v_thread3Thread1of1ForFork1_~i~2_98 1) c_~N~0) (< .cse0 .cse1) (< c_~M~0 v_thread3Thread1of1ForFork1_~i~2_98) (< .cse0 .cse2)))) (or .cse3 (forall ((v_ArrVal_734 (Array Int Int)) (v_thread3Thread1of1ForFork1_~i~2_98 Int)) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_734) c_~A~0.base) (+ c_~A~0.offset (* v_thread3Thread1of1ForFork1_~i~2_98 4))))) (or (< (+ v_thread3Thread1of1ForFork1_~i~2_98 1) c_~N~0) (< .cse4 .cse1) (< c_~M~0 v_thread3Thread1of1ForFork1_~i~2_98) (< c_~max2~0 .cse4))))) (or (forall ((v_ArrVal_734 (Array Int Int)) (v_thread3Thread1of1ForFork1_~i~2_98 Int)) (or (< (+ v_thread3Thread1of1ForFork1_~i~2_98 1) c_~N~0) (< c_~max3~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_734) c_~A~0.base) (+ c_~A~0.offset (* v_thread3Thread1of1ForFork1_~i~2_98 4)))) (< c_~M~0 v_thread3Thread1of1ForFork1_~i~2_98))) (and (or .cse3 (< c_~max2~0 c_~max3~0)) (or (= c_~max1~0 c_~max3~0) (< c_~max3~0 .cse2)))))) is different from false [2023-11-17 12:23:33,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:23:33,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 1205 treesize of output 1659 [2023-11-17 12:23:33,801 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 761 treesize of output 749 [2023-11-17 12:23:34,009 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 749 treesize of output 743 [2023-11-17 12:23:34,224 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 743 treesize of output 725 [2023-11-17 12:23:34,420 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 725 treesize of output 719 [2023-11-17 12:23:34,584 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 719 treesize of output 701 [2023-11-17 12:23:34,730 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 701 treesize of output 689 [2023-11-17 12:23:34,873 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 689 treesize of output 671 [2023-11-17 12:23:35,020 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 671 treesize of output 659 [2023-11-17 12:23:35,155 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 12:23:35,180 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 659 treesize of output 653 [2023-11-17 12:23:35,319 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 653 treesize of output 647 [2023-11-17 12:23:35,467 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 647 treesize of output 635 [2023-11-17 12:23:35,621 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 635 treesize of output 617 [2023-11-17 12:24:55,715 WARN L667 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2023-11-17 12:28:50,444 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-17 12:30:20,225 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-17 12:30:20,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-11-17 12:30:20,230 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-17 12:30:20,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 12:30:20,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 12:30:20,431 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2023-11-17 12:30:20,434 INFO L158 Benchmark]: Toolchain (without parser) took 454292.15ms. Allocated memory was 179.3MB in the beginning and 1.1GB in the end (delta: 921.7MB). Free memory was 129.2MB in the beginning and 685.0MB in the end (delta: -555.8MB). Peak memory consumption was 905.5MB. Max. memory is 8.0GB. [2023-11-17 12:30:20,434 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 179.3MB. Free memory was 134.4MB in the beginning and 134.3MB in the end (delta: 149.2kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:30:20,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.06ms. Allocated memory is still 179.3MB. Free memory was 129.2MB in the beginning and 117.2MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-11-17 12:30:20,434 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.65ms. Allocated memory is still 179.3MB. Free memory was 117.2MB in the beginning and 115.4MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:30:20,434 INFO L158 Benchmark]: Boogie Preprocessor took 50.46ms. Allocated memory is still 179.3MB. Free memory was 115.4MB in the beginning and 113.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:30:20,435 INFO L158 Benchmark]: RCFGBuilder took 752.86ms. Allocated memory was 179.3MB in the beginning and 247.5MB in the end (delta: 68.2MB). Free memory was 113.4MB in the beginning and 194.6MB in the end (delta: -81.2MB). Peak memory consumption was 27.8MB. Max. memory is 8.0GB. [2023-11-17 12:30:20,435 INFO L158 Benchmark]: TraceAbstraction took 453113.09ms. Allocated memory was 247.5MB in the beginning and 1.1GB in the end (delta: 853.5MB). Free memory was 194.1MB in the beginning and 685.0MB in the end (delta: -490.8MB). Peak memory consumption was 900.8MB. Max. memory is 8.0GB. [2023-11-17 12:30:20,436 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 179.3MB. Free memory was 134.4MB in the beginning and 134.3MB in the end (delta: 149.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 315.06ms. Allocated memory is still 179.3MB. Free memory was 129.2MB in the beginning and 117.2MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 51.65ms. Allocated memory is still 179.3MB. Free memory was 117.2MB in the beginning and 115.4MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.46ms. Allocated memory is still 179.3MB. Free memory was 115.4MB in the beginning and 113.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 752.86ms. Allocated memory was 179.3MB in the beginning and 247.5MB in the end (delta: 68.2MB). Free memory was 113.4MB in the beginning and 194.6MB in the end (delta: -81.2MB). Peak memory consumption was 27.8MB. Max. memory is 8.0GB. * TraceAbstraction took 453113.09ms. Allocated memory was 247.5MB in the beginning and 1.1GB in the end (delta: 853.5MB). Free memory was 194.1MB in the beginning and 685.0MB in the end (delta: -490.8MB). Peak memory consumption was 900.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.6s, 37 PlacesBefore, 30 PlacesAfterwards, 31 TransitionsBefore, 24 TransitionsAfterwards, 300 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 7 TotalNumberOfCompositions, 371 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 334, independent: 326, independent conditional: 0, independent unconditional: 326, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 175, independent: 167, independent conditional: 0, independent unconditional: 167, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 175, independent: 167, independent conditional: 0, independent unconditional: 167, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 25, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 334, independent: 159, independent conditional: 0, independent unconditional: 159, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 175, unknown conditional: 0, unknown unconditional: 175] , Statistics on independence cache: Total cache size (in pairs): 65, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...