/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:11:03,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:11:03,730 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 12:11:03,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:11:03,757 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:11:03,757 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:11:03,758 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:11:03,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:11:03,758 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:11:03,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:11:03,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:11:03,762 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:11:03,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:11:03,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:11:03,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:11:03,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:11:03,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:11:03,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:11:03,764 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:11:03,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:11:03,765 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:11:03,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:11:03,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:11:03,766 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:11:03,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:11:03,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:11:03,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:11:03,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:11:03,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:11:03,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:11:03,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:11:03,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:11:03,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:11:03,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:11:03,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:11:03,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:11:03,982 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:11:03,983 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:11:03,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-17 12:11:04,973 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:11:05,150 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:11:05,151 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-17 12:11:05,156 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d191c888d/bb396c1519b0464096a4ede7ae18e6d6/FLAG540579150 [2023-11-17 12:11:05,166 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d191c888d/bb396c1519b0464096a4ede7ae18e6d6 [2023-11-17 12:11:05,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:11:05,169 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:11:05,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:11:05,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:11:05,173 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:11:05,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604207bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05, skipping insertion in model container [2023-11-17 12:11:05,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,190 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:11:05,326 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2023-11-17 12:11:05,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:11:05,343 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:11:05,358 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2023-11-17 12:11:05,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:11:05,370 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:11:05,371 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:11:05,376 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:11:05,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05 WrapperNode [2023-11-17 12:11:05,377 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:11:05,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:11:05,378 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:11:05,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:11:05,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,389 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,410 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2023-11-17 12:11:05,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:11:05,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:11:05,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:11:05,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:11:05,419 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,421 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,426 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,429 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,431 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:11:05,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:11:05,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:11:05,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:11:05,434 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (1/1) ... [2023-11-17 12:11:05,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:11:05,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:05,468 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 12:11:05,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 12:11:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:11:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:11:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:11:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:11:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:11:05,496 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:11:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:11:05,497 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:11:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:11:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:11:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:11:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:11:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:11:05,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:11:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:11:05,499 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:11:05,607 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:11:05,609 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:11:05,840 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:11:06,019 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:11:06,019 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 12:11:06,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:11:06 BoogieIcfgContainer [2023-11-17 12:11:06,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:11:06,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:11:06,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:11:06,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:11:06,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:11:05" (1/3) ... [2023-11-17 12:11:06,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f684282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:11:06, skipping insertion in model container [2023-11-17 12:11:06,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:11:05" (2/3) ... [2023-11-17 12:11:06,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f684282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:11:06, skipping insertion in model container [2023-11-17 12:11:06,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:11:06" (3/3) ... [2023-11-17 12:11:06,027 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-11-17 12:11:06,039 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:11:06,039 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:11:06,039 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:11:06,088 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:11:06,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 64 flow [2023-11-17 12:11:06,135 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-17 12:11:06,135 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:11:06,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 3/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:11:06,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 64 flow [2023-11-17 12:11:06,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 56 flow [2023-11-17 12:11:06,142 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:11:06,150 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 22 transitions, 56 flow [2023-11-17 12:11:06,152 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 22 transitions, 56 flow [2023-11-17 12:11:06,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 56 flow [2023-11-17 12:11:06,158 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-17 12:11:06,158 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:11:06,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:11:06,159 INFO L119 LiptonReduction]: Number of co-enabled transitions 110 [2023-11-17 12:11:06,513 INFO L134 LiptonReduction]: Checked pairs total: 146 [2023-11-17 12:11:06,514 INFO L136 LiptonReduction]: Total number of compositions: 5 [2023-11-17 12:11:06,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:11:06,540 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;@3ec8a918, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:11:06,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:11:06,548 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:11:06,548 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 12:11:06,548 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:11:06,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:06,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:06,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:06,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash 705005359, now seen corresponding path program 1 times [2023-11-17 12:11:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:06,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071459348] [2023-11-17 12:11:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:06,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:06,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:06,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071459348] [2023-11-17 12:11:06,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071459348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:06,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:06,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:11:06,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244655867] [2023-11-17 12:11:06,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:06,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:11:06,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:11:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:11:06,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2023-11-17 12:11:06,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:06,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:06,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2023-11-17 12:11:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:06,916 INFO L124 PetriNetUnfolderBase]: 75/136 cut-off events. [2023-11-17 12:11:06,916 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 12:11:06,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 136 events. 75/136 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 354 event pairs, 24 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-17 12:11:06,920 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 25 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-17 12:11:06,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 137 flow [2023-11-17 12:11:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:11:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:11:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2023-11-17 12:11:06,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 12:11:06,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 45 transitions. [2023-11-17 12:11:06,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 45 transitions. [2023-11-17 12:11:06,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:06,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 45 transitions. [2023-11-17 12:11:06,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:06,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:06,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:06,940 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 45 transitions. [2023-11-17 12:11:06,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 137 flow [2023-11-17 12:11:06,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:11:06,947 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-17 12:11:06,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-17 12:11:06,953 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 12:11:06,954 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-17 12:11:06,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:06,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:06,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:06,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:11:06,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:06,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash 314048255, now seen corresponding path program 1 times [2023-11-17 12:11:06,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:06,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125080086] [2023-11-17 12:11:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:06,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:07,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:07,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125080086] [2023-11-17 12:11:07,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125080086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:07,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:07,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:11:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705914782] [2023-11-17 12:11:07,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:07,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:11:07,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:07,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:11:07,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:11:07,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:07,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:07,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:07,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:07,242 INFO L124 PetriNetUnfolderBase]: 129/247 cut-off events. [2023-11-17 12:11:07,242 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-17 12:11:07,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 247 events. 129/247 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 843 event pairs, 77 based on Foata normal form. 14/259 useless extension candidates. Maximal degree in co-relation 236. Up to 137 conditions per place. [2023-11-17 12:11:07,245 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-11-17 12:11:07,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 42 transitions, 204 flow [2023-11-17 12:11:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:11:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:11:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2023-11-17 12:11:07,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2023-11-17 12:11:07,248 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 54 transitions. [2023-11-17 12:11:07,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 54 transitions. [2023-11-17 12:11:07,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:07,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 54 transitions. [2023-11-17 12:11:07,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,252 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 54 transitions. [2023-11-17 12:11:07,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 42 transitions, 204 flow [2023-11-17 12:11:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:11:07,255 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 92 flow [2023-11-17 12:11:07,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-11-17 12:11:07,255 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 12:11:07,256 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 92 flow [2023-11-17 12:11:07,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:07,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:07,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:11:07,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:07,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1284933850, now seen corresponding path program 1 times [2023-11-17 12:11:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:07,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973048380] [2023-11-17 12:11:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:07,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:07,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:07,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973048380] [2023-11-17 12:11:07,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973048380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:07,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:07,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:11:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803065415] [2023-11-17 12:11:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:07,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:11:07,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:07,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:11:07,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:11:07,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:07,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:07,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:07,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:07,444 INFO L124 PetriNetUnfolderBase]: 99/193 cut-off events. [2023-11-17 12:11:07,444 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-17 12:11:07,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 193 events. 99/193 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 604 event pairs, 63 based on Foata normal form. 8/200 useless extension candidates. Maximal degree in co-relation 357. Up to 137 conditions per place. [2023-11-17 12:11:07,449 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 18 selfloop transitions, 2 changer transitions 17/37 dead transitions. [2023-11-17 12:11:07,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 207 flow [2023-11-17 12:11:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:11:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:11:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2023-11-17 12:11:07,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34 [2023-11-17 12:11:07,451 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2023-11-17 12:11:07,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2023-11-17 12:11:07,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:07,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2023-11-17 12:11:07,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,454 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,454 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 92 flow. Second operand 5 states and 51 transitions. [2023-11-17 12:11:07,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 207 flow [2023-11-17 12:11:07,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 37 transitions, 203 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:11:07,456 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 80 flow [2023-11-17 12:11:07,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-11-17 12:11:07,458 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-17 12:11:07,458 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 80 flow [2023-11-17 12:11:07,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:07,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:07,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:11:07,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:07,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:07,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1715696666, now seen corresponding path program 1 times [2023-11-17 12:11:07,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:07,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605467591] [2023-11-17 12:11:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:07,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:07,547 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 12:11:07,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605467591] [2023-11-17 12:11:07,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605467591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655466259] [2023-11-17 12:11:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:07,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:07,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:07,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:07,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:11:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:07,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:11:07,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:07,693 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 12:11:07,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:07,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655466259] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:07,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:11:07,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-17 12:11:07,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936360499] [2023-11-17 12:11:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:11:07,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:11:07,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:11:07,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:07,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:07,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:07,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:07,782 INFO L124 PetriNetUnfolderBase]: 72/131 cut-off events. [2023-11-17 12:11:07,782 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-17 12:11:07,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 131 events. 72/131 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 314 event pairs, 30 based on Foata normal form. 14/144 useless extension candidates. Maximal degree in co-relation 381. Up to 97 conditions per place. [2023-11-17 12:11:07,783 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 23 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-11-17 12:11:07,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 167 flow [2023-11-17 12:11:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:11:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:11:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2023-11-17 12:11:07,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2733333333333333 [2023-11-17 12:11:07,784 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 41 transitions. [2023-11-17 12:11:07,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 41 transitions. [2023-11-17 12:11:07,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:07,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 41 transitions. [2023-11-17 12:11:07,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 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 12:11:07,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,785 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,785 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 80 flow. Second operand 5 states and 41 transitions. [2023-11-17 12:11:07,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 167 flow [2023-11-17 12:11:07,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 139 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 12:11:07,788 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-11-17 12:11:07,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-11-17 12:11:07,789 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 12:11:07,789 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-11-17 12:11:07,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:07,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:07,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:07,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:07,994 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 12:11:07,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:07,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:07,995 INFO L85 PathProgramCache]: Analyzing trace with hash 971283601, now seen corresponding path program 1 times [2023-11-17 12:11:07,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:07,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409233307] [2023-11-17 12:11:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:08,084 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 12:11:08,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:08,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409233307] [2023-11-17 12:11:08,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409233307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:08,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443040304] [2023-11-17 12:11:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:08,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:08,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:08,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:11:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:08,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:11:08,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:08,219 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 12:11:08,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:08,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443040304] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:08,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:11:08,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-17 12:11:08,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992440316] [2023-11-17 12:11:08,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:08,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:11:08,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:08,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:11:08,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:11:08,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:08,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:08,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:08,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:08,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:08,300 INFO L124 PetriNetUnfolderBase]: 66/119 cut-off events. [2023-11-17 12:11:08,300 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-17 12:11:08,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 119 events. 66/119 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 267 event pairs, 29 based on Foata normal form. 10/128 useless extension candidates. Maximal degree in co-relation 325. Up to 94 conditions per place. [2023-11-17 12:11:08,301 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 24 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2023-11-17 12:11:08,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 172 flow [2023-11-17 12:11:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:11:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:11:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2023-11-17 12:11:08,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2733333333333333 [2023-11-17 12:11:08,302 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 41 transitions. [2023-11-17 12:11:08,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 41 transitions. [2023-11-17 12:11:08,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:08,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 41 transitions. [2023-11-17 12:11:08,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 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 12:11:08,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:08,303 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:08,303 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 41 transitions. [2023-11-17 12:11:08,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 172 flow [2023-11-17 12:11:08,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 157 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 12:11:08,304 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-11-17 12:11:08,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-17 12:11:08,304 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-11-17 12:11:08,305 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-11-17 12:11:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:08,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:08,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:08,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:08,509 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 12:11:08,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:08,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:08,510 INFO L85 PathProgramCache]: Analyzing trace with hash 744345840, now seen corresponding path program 1 times [2023-11-17 12:11:08,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:08,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179205752] [2023-11-17 12:11:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:08,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:08,816 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 12:11:08,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:08,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179205752] [2023-11-17 12:11:08,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179205752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:08,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683992836] [2023-11-17 12:11:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:08,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:08,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:08,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:08,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:11:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:08,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:11:08,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:08,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:11:08,915 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 10 treesize of output 8 [2023-11-17 12:11:08,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:11:08,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:11:08,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:11:09,019 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 12:11:09,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:09,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:09,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-11-17 12:11:09,168 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 138 treesize of output 122 [2023-11-17 12:11:09,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-11-17 12:11:09,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-11-17 12:11:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:09,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683992836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:09,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:09,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-11-17 12:11:09,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651038734] [2023-11-17 12:11:09,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:09,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:11:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:11:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=233, Unknown=13, NotChecked=0, Total=306 [2023-11-17 12:11:09,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:09,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:09,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:09,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:09,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:09,457 INFO L124 PetriNetUnfolderBase]: 110/198 cut-off events. [2023-11-17 12:11:09,457 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2023-11-17 12:11:09,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 609 event pairs, 5 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-11-17 12:11:09,458 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 39 selfloop transitions, 14 changer transitions 1/54 dead transitions. [2023-11-17 12:11:09,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 309 flow [2023-11-17 12:11:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:11:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:11:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2023-11-17 12:11:09,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31666666666666665 [2023-11-17 12:11:09,461 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 76 transitions. [2023-11-17 12:11:09,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 76 transitions. [2023-11-17 12:11:09,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:09,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 76 transitions. [2023-11-17 12:11:09,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:09,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:09,465 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:09,465 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 76 transitions. [2023-11-17 12:11:09,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 309 flow [2023-11-17 12:11:09,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 54 transitions, 297 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 12:11:09,467 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 174 flow [2023-11-17 12:11:09,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-17 12:11:09,469 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-17 12:11:09,470 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 174 flow [2023-11-17 12:11:09,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:09,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:09,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:09,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:09,675 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 12:11:09,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:09,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1496834384, now seen corresponding path program 2 times [2023-11-17 12:11:09,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:09,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049778407] [2023-11-17 12:11:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:09,997 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 12:11:09,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:09,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049778407] [2023-11-17 12:11:09,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049778407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:09,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371141246] [2023-11-17 12:11:09,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:11:09,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:09,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:10,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:10,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:11:10,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:10,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:10,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:11:10,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:10,124 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 12:11:10,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:10,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:10,142 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 21 treesize of output 14 [2023-11-17 12:11:10,171 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 12:11:10,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371141246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:10,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 12 [2023-11-17 12:11:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569965155] [2023-11-17 12:11:10,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:10,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:11:10,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:11:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:11:10,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:10,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 174 flow. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:10,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:10,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:10,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:10,345 INFO L124 PetriNetUnfolderBase]: 137/246 cut-off events. [2023-11-17 12:11:10,345 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-11-17 12:11:10,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 774 event pairs, 27 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-11-17 12:11:10,347 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 39 selfloop transitions, 15 changer transitions 1/55 dead transitions. [2023-11-17 12:11:10,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 389 flow [2023-11-17 12:11:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:11:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:11:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2023-11-17 12:11:10,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27037037037037037 [2023-11-17 12:11:10,349 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 73 transitions. [2023-11-17 12:11:10,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 73 transitions. [2023-11-17 12:11:10,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:10,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 73 transitions. [2023-11-17 12:11:10,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:10,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:10,350 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:10,350 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 174 flow. Second operand 9 states and 73 transitions. [2023-11-17 12:11:10,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 389 flow [2023-11-17 12:11:10,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 375 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 12:11:10,353 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 283 flow [2023-11-17 12:11:10,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-17 12:11:10,353 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-17 12:11:10,353 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 283 flow [2023-11-17 12:11:10,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:10,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:10,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:10,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:10,559 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 12:11:10,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:10,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1314421726, now seen corresponding path program 3 times [2023-11-17 12:11:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:10,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285045555] [2023-11-17 12:11:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:10,754 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 12:11:10,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:10,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285045555] [2023-11-17 12:11:10,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285045555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:10,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711425755] [2023-11-17 12:11:10,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:10,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:10,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:10,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:10,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:11:10,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:11:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:10,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:11:10,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:10,892 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 12:11:10,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:10,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:10,912 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 21 treesize of output 14 [2023-11-17 12:11:10,943 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 12:11:10,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711425755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:10,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:10,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-17 12:11:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437476565] [2023-11-17 12:11:10,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:11:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:11:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:11:10,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:10,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:10,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:10,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:10,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:11,075 INFO L124 PetriNetUnfolderBase]: 153/275 cut-off events. [2023-11-17 12:11:11,075 INFO L125 PetriNetUnfolderBase]: For 519/519 co-relation queries the response was YES. [2023-11-17 12:11:11,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 275 events. 153/275 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 926 event pairs, 35 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 1063. Up to 219 conditions per place. [2023-11-17 12:11:11,077 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 44 selfloop transitions, 15 changer transitions 1/60 dead transitions. [2023-11-17 12:11:11,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 485 flow [2023-11-17 12:11:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:11:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:11:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2023-11-17 12:11:11,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142857142857143 [2023-11-17 12:11:11,078 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 66 transitions. [2023-11-17 12:11:11,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 66 transitions. [2023-11-17 12:11:11,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:11,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 66 transitions. [2023-11-17 12:11:11,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,079 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,080 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 283 flow. Second operand 7 states and 66 transitions. [2023-11-17 12:11:11,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 485 flow [2023-11-17 12:11:11,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 453 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 12:11:11,082 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 346 flow [2023-11-17 12:11:11,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-17 12:11:11,083 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-11-17 12:11:11,083 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 346 flow [2023-11-17 12:11:11,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:11,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:11,091 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 12:11:11,291 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 12:11:11,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:11,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1078712346, now seen corresponding path program 4 times [2023-11-17 12:11:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:11,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091947252] [2023-11-17 12:11:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:11,438 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 12:11:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091947252] [2023-11-17 12:11:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091947252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843182798] [2023-11-17 12:11:11,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:11:11,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:11,440 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 12:11:11,442 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 12:11:11,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:11:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:11,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 12:11:11,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:11,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:11:11,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:11:11,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:11:11,612 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 12:11:11,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:11,660 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 12:11:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843182798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:11,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:11,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 4] total 12 [2023-11-17 12:11:11,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184634427] [2023-11-17 12:11:11,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:11:11,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:11:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:11:11,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:11,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 346 flow. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:11,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:11,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:11,900 INFO L124 PetriNetUnfolderBase]: 175/314 cut-off events. [2023-11-17 12:11:11,900 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2023-11-17 12:11:11,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 314 events. 175/314 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1087 event pairs, 39 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 1272. Up to 262 conditions per place. [2023-11-17 12:11:11,902 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 46 selfloop transitions, 16 changer transitions 1/63 dead transitions. [2023-11-17 12:11:11,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 552 flow [2023-11-17 12:11:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:11:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:11:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2023-11-17 12:11:11,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27037037037037037 [2023-11-17 12:11:11,904 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 73 transitions. [2023-11-17 12:11:11,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 73 transitions. [2023-11-17 12:11:11,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:11,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 73 transitions. [2023-11-17 12:11:11,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,905 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,905 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 346 flow. Second operand 9 states and 73 transitions. [2023-11-17 12:11:11,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 552 flow [2023-11-17 12:11:11,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 526 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 12:11:11,909 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 406 flow [2023-11-17 12:11:11,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-11-17 12:11:11,910 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-11-17 12:11:11,910 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 406 flow [2023-11-17 12:11:11,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:11,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:11,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:11,919 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 12:11:12,117 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 12:11:12,117 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:12,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash 543482544, now seen corresponding path program 5 times [2023-11-17 12:11:12,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:12,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713796565] [2023-11-17 12:11:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:12,263 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 12:11:12,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:12,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713796565] [2023-11-17 12:11:12,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713796565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:12,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491913021] [2023-11-17 12:11:12,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:11:12,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:12,265 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 12:11:12,267 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 12:11:12,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:12,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:12,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 12:11:12,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:12,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:11:12,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:11:12,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:11:12,426 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 12:11:12,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:12,476 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 12:11:12,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491913021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:12,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:12,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 4] total 12 [2023-11-17 12:11:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159699789] [2023-11-17 12:11:12,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:12,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:11:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:11:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:11:12,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:12,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 406 flow. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:12,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:12,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:12,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:12,691 INFO L124 PetriNetUnfolderBase]: 197/353 cut-off events. [2023-11-17 12:11:12,691 INFO L125 PetriNetUnfolderBase]: For 1080/1080 co-relation queries the response was YES. [2023-11-17 12:11:12,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 353 events. 197/353 cut-off events. For 1080/1080 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1278 event pairs, 49 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 1473. Up to 301 conditions per place. [2023-11-17 12:11:12,695 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 48 selfloop transitions, 16 changer transitions 1/65 dead transitions. [2023-11-17 12:11:12,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 619 flow [2023-11-17 12:11:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:11:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:11:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 71 transitions. [2023-11-17 12:11:12,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26296296296296295 [2023-11-17 12:11:12,696 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 71 transitions. [2023-11-17 12:11:12,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 71 transitions. [2023-11-17 12:11:12,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:12,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 71 transitions. [2023-11-17 12:11:12,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:12,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:12,698 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:12,698 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 406 flow. Second operand 9 states and 71 transitions. [2023-11-17 12:11:12,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 619 flow [2023-11-17 12:11:12,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 580 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-17 12:11:12,703 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 461 flow [2023-11-17 12:11:12,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=461, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2023-11-17 12:11:12,703 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-11-17 12:11:12,704 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 461 flow [2023-11-17 12:11:12,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:12,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:12,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:12,712 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 12:11:12,911 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 12:11:12,912 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:12,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1742336680, now seen corresponding path program 6 times [2023-11-17 12:11:12,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:12,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807635672] [2023-11-17 12:11:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:12,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:13,051 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 12:11:13,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807635672] [2023-11-17 12:11:13,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807635672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321949013] [2023-11-17 12:11:13,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:11:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:13,052 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 12:11:13,057 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 12:11:13,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:11:13,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:13,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 12:11:13,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:13,159 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 12:11:13,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:13,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:13,181 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 17 treesize of output 14 [2023-11-17 12:11:13,199 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 12:11:13,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321949013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:13,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:13,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-11-17 12:11:13,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492221203] [2023-11-17 12:11:13,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:13,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:11:13,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:13,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:11:13,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:11:13,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:13,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 461 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:13,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:13,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:13,347 INFO L124 PetriNetUnfolderBase]: 225/402 cut-off events. [2023-11-17 12:11:13,347 INFO L125 PetriNetUnfolderBase]: For 1377/1377 co-relation queries the response was YES. [2023-11-17 12:11:13,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 402 events. 225/402 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1518 event pairs, 47 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 1720. Up to 330 conditions per place. [2023-11-17 12:11:13,350 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 50 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2023-11-17 12:11:13,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 718 flow [2023-11-17 12:11:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:11:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:11:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2023-11-17 12:11:13,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047619047619048 [2023-11-17 12:11:13,351 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 64 transitions. [2023-11-17 12:11:13,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 64 transitions. [2023-11-17 12:11:13,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:13,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 64 transitions. [2023-11-17 12:11:13,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,352 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,352 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 461 flow. Second operand 7 states and 64 transitions. [2023-11-17 12:11:13,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 718 flow [2023-11-17 12:11:13,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 667 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-11-17 12:11:13,358 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 557 flow [2023-11-17 12:11:13,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=557, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-17 12:11:13,359 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-11-17 12:11:13,359 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 557 flow [2023-11-17 12:11:13,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:13,359 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:13,370 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 12:11:13,565 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 12:11:13,565 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:13,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash -609808437, now seen corresponding path program 7 times [2023-11-17 12:11:13,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:13,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716791471] [2023-11-17 12:11:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:13,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:13,623 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 12:11:13,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716791471] [2023-11-17 12:11:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716791471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107113213] [2023-11-17 12:11:13,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:11:13,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:13,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:13,625 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 12:11:13,644 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 12:11:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:13,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:11:13,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:13,741 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 12:11:13,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:13,778 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 12:11:13,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107113213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:13,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:13,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:11:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164033884] [2023-11-17 12:11:13,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:11:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:11:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:11:13,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:13,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 557 flow. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:13,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:13,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:13,923 INFO L124 PetriNetUnfolderBase]: 391/728 cut-off events. [2023-11-17 12:11:13,924 INFO L125 PetriNetUnfolderBase]: For 2739/2739 co-relation queries the response was YES. [2023-11-17 12:11:13,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3187 conditions, 728 events. 391/728 cut-off events. For 2739/2739 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3490 event pairs, 167 based on Foata normal form. 38/766 useless extension candidates. Maximal degree in co-relation 2777. Up to 402 conditions per place. [2023-11-17 12:11:13,928 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 105 selfloop transitions, 16 changer transitions 0/121 dead transitions. [2023-11-17 12:11:13,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 121 transitions, 1364 flow [2023-11-17 12:11:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:11:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:11:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2023-11-17 12:11:13,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3238095238095238 [2023-11-17 12:11:13,929 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 68 transitions. [2023-11-17 12:11:13,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 68 transitions. [2023-11-17 12:11:13,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:13,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 68 transitions. [2023-11-17 12:11:13,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,930 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,930 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 557 flow. Second operand 7 states and 68 transitions. [2023-11-17 12:11:13,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 121 transitions, 1364 flow [2023-11-17 12:11:13,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 1279 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-11-17 12:11:13,935 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 761 flow [2023-11-17 12:11:13,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=761, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2023-11-17 12:11:13,936 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-11-17 12:11:13,936 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 761 flow [2023-11-17 12:11:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:13,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:13,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:13,941 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 12:11:14,141 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 12:11:14,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:14,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:14,142 INFO L85 PathProgramCache]: Analyzing trace with hash 424019828, now seen corresponding path program 8 times [2023-11-17 12:11:14,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:14,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812914526] [2023-11-17 12:11:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:14,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:14,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:14,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812914526] [2023-11-17 12:11:14,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812914526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:14,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530489363] [2023-11-17 12:11:14,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:11:14,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:14,204 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 12:11:14,213 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 12:11:14,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:14,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:14,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:11:14,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:14,325 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 12:11:14,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:14,361 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 12:11:14,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530489363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:14,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:14,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:11:14,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848935636] [2023-11-17 12:11:14,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:14,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:11:14,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:14,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:11:14,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:11:14,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:14,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 761 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:14,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:14,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:14,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:14,491 INFO L124 PetriNetUnfolderBase]: 323/638 cut-off events. [2023-11-17 12:11:14,492 INFO L125 PetriNetUnfolderBase]: For 2554/2554 co-relation queries the response was YES. [2023-11-17 12:11:14,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 638 events. 323/638 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3156 event pairs, 155 based on Foata normal form. 44/682 useless extension candidates. Maximal degree in co-relation 2514. Up to 402 conditions per place. [2023-11-17 12:11:14,495 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 56 selfloop transitions, 3 changer transitions 40/99 dead transitions. [2023-11-17 12:11:14,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 1127 flow [2023-11-17 12:11:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:11:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:11:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2023-11-17 12:11:14,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.319047619047619 [2023-11-17 12:11:14,496 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 67 transitions. [2023-11-17 12:11:14,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 67 transitions. [2023-11-17 12:11:14,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:14,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 67 transitions. [2023-11-17 12:11:14,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:14,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:14,497 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:14,497 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 761 flow. Second operand 7 states and 67 transitions. [2023-11-17 12:11:14,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 1127 flow [2023-11-17 12:11:14,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 1111 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-17 12:11:14,503 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 612 flow [2023-11-17 12:11:14,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=612, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2023-11-17 12:11:14,503 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2023-11-17 12:11:14,503 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 612 flow [2023-11-17 12:11:14,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:14,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:14,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:14,512 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 12:11:14,709 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 12:11:14,709 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:14,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:14,710 INFO L85 PathProgramCache]: Analyzing trace with hash -576575203, now seen corresponding path program 9 times [2023-11-17 12:11:14,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:14,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571809287] [2023-11-17 12:11:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:14,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:14,824 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 12:11:14,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571809287] [2023-11-17 12:11:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571809287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321630222] [2023-11-17 12:11:14,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:14,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:14,826 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 12:11:14,841 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 12:11:14,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:11:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:14,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:11:14,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:14,961 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 12:11:14,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:15,005 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 12:11:15,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321630222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:15,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:15,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:11:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95180684] [2023-11-17 12:11:15,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:15,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:11:15,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:11:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:11:15,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:15,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 612 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:15,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:15,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:15,101 INFO L124 PetriNetUnfolderBase]: 173/307 cut-off events. [2023-11-17 12:11:15,101 INFO L125 PetriNetUnfolderBase]: For 1836/1836 co-relation queries the response was YES. [2023-11-17 12:11:15,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 307 events. 173/307 cut-off events. For 1836/1836 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1063 event pairs, 31 based on Foata normal form. 50/357 useless extension candidates. Maximal degree in co-relation 1658. Up to 148 conditions per place. [2023-11-17 12:11:15,103 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 44 selfloop transitions, 26 changer transitions 0/70 dead transitions. [2023-11-17 12:11:15,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 836 flow [2023-11-17 12:11:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:11:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:11:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 58 transitions. [2023-11-17 12:11:15,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24166666666666667 [2023-11-17 12:11:15,104 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 58 transitions. [2023-11-17 12:11:15,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 58 transitions. [2023-11-17 12:11:15,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:15,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 58 transitions. [2023-11-17 12:11:15,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,105 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,105 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 612 flow. Second operand 8 states and 58 transitions. [2023-11-17 12:11:15,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 836 flow [2023-11-17 12:11:15,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 70 transitions, 694 flow, removed 68 selfloop flow, removed 9 redundant places. [2023-11-17 12:11:15,110 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 570 flow [2023-11-17 12:11:15,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=570, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2023-11-17 12:11:15,110 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-11-17 12:11:15,110 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 570 flow [2023-11-17 12:11:15,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:15,111 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:15,120 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 12:11:15,316 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 12:11:15,316 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:15,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:15,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1606474302, now seen corresponding path program 10 times [2023-11-17 12:11:15,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:15,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539051138] [2023-11-17 12:11:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:15,373 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 12:11:15,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:15,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539051138] [2023-11-17 12:11:15,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539051138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:15,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618644499] [2023-11-17 12:11:15,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:11:15,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:15,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:15,375 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 12:11:15,400 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 12:11:15,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:11:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:15,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:11:15,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:15,501 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 12:11:15,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:15,550 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 12:11:15,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618644499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:15,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:15,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 12:11:15,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387528930] [2023-11-17 12:11:15,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:15,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:11:15,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:15,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:11:15,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:11:15,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:15,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 570 flow. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:15,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:15,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:15,648 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2023-11-17 12:11:15,649 INFO L125 PetriNetUnfolderBase]: For 1339/1339 co-relation queries the response was YES. [2023-11-17 12:11:15,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1299 conditions, 223 events. 127/223 cut-off events. For 1339/1339 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 646 event pairs, 34 based on Foata normal form. 26/249 useless extension candidates. Maximal degree in co-relation 1244. Up to 125 conditions per place. [2023-11-17 12:11:15,650 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 45 selfloop transitions, 26 changer transitions 0/71 dead transitions. [2023-11-17 12:11:15,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 796 flow [2023-11-17 12:11:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:11:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:11:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 58 transitions. [2023-11-17 12:11:15,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24166666666666667 [2023-11-17 12:11:15,651 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 58 transitions. [2023-11-17 12:11:15,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 58 transitions. [2023-11-17 12:11:15,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:15,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 58 transitions. [2023-11-17 12:11:15,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,652 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,652 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 570 flow. Second operand 8 states and 58 transitions. [2023-11-17 12:11:15,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 796 flow [2023-11-17 12:11:15,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 716 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-11-17 12:11:15,656 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 582 flow [2023-11-17 12:11:15,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=582, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2023-11-17 12:11:15,656 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-11-17 12:11:15,656 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 582 flow [2023-11-17 12:11:15,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:15,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:15,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:15,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:15,861 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 12:11:15,862 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:15,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1619933589, now seen corresponding path program 11 times [2023-11-17 12:11:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:15,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627842043] [2023-11-17 12:11:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:15,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:16,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:16,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627842043] [2023-11-17 12:11:16,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627842043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:16,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574899532] [2023-11-17 12:11:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:11:16,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:16,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:16,274 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 12:11:16,292 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 12:11:16,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:16,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:16,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 12:11:16,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:16,362 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 42 treesize of output 38 [2023-11-17 12:11:16,425 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 22 treesize of output 15 [2023-11-17 12:11:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:16,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:16,543 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_369 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0))) is different from false [2023-11-17 12:11:16,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:16,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2023-11-17 12:11:16,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:16,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 12 [2023-11-17 12:11:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-11-17 12:11:16,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574899532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:16,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:16,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 21 [2023-11-17 12:11:16,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767668189] [2023-11-17 12:11:16,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:11:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:11:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=381, Unknown=7, NotChecked=40, Total=506 [2023-11-17 12:11:16,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:16,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 582 flow. Second operand has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:16,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:16,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:16,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:17,058 INFO L124 PetriNetUnfolderBase]: 179/316 cut-off events. [2023-11-17 12:11:17,059 INFO L125 PetriNetUnfolderBase]: For 1918/1918 co-relation queries the response was YES. [2023-11-17 12:11:17,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 316 events. 179/316 cut-off events. For 1918/1918 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1059 event pairs, 6 based on Foata normal form. 1/317 useless extension candidates. Maximal degree in co-relation 1758. Up to 196 conditions per place. [2023-11-17 12:11:17,061 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 68 selfloop transitions, 31 changer transitions 1/100 dead transitions. [2023-11-17 12:11:17,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 100 transitions, 1011 flow [2023-11-17 12:11:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:11:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:11:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 110 transitions. [2023-11-17 12:11:17,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28205128205128205 [2023-11-17 12:11:17,062 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 110 transitions. [2023-11-17 12:11:17,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 110 transitions. [2023-11-17 12:11:17,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:17,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 110 transitions. [2023-11-17 12:11:17,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:17,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:17,064 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:17,064 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 582 flow. Second operand 13 states and 110 transitions. [2023-11-17 12:11:17,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 100 transitions, 1011 flow [2023-11-17 12:11:17,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 100 transitions, 945 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-11-17 12:11:17,069 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 743 flow [2023-11-17 12:11:17,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=743, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-11-17 12:11:17,069 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-11-17 12:11:17,069 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 743 flow [2023-11-17 12:11:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:17,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:17,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:17,077 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 12:11:17,270 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 12:11:17,270 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:17,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:17,270 INFO L85 PathProgramCache]: Analyzing trace with hash 170936551, now seen corresponding path program 12 times [2023-11-17 12:11:17,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:17,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567237454] [2023-11-17 12:11:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:17,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:17,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567237454] [2023-11-17 12:11:17,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567237454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:17,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129149136] [2023-11-17 12:11:17,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:11:17,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:17,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:17,672 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 12:11:17,688 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 12:11:17,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:11:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:17,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:11:17,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:17,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:17,955 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 15 treesize of output 14 [2023-11-17 12:11:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:17,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:18,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:18,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-11-17 12:11:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:18,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129149136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:18,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:18,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-17 12:11:18,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318096937] [2023-11-17 12:11:18,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:18,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:11:18,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:18,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:11:18,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 12:11:18,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:18,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 743 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:18,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:18,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:18,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:18,982 INFO L124 PetriNetUnfolderBase]: 298/526 cut-off events. [2023-11-17 12:11:18,982 INFO L125 PetriNetUnfolderBase]: For 3294/3294 co-relation queries the response was YES. [2023-11-17 12:11:18,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 526 events. 298/526 cut-off events. For 3294/3294 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2038 event pairs, 29 based on Foata normal form. 2/528 useless extension candidates. Maximal degree in co-relation 3025. Up to 346 conditions per place. [2023-11-17 12:11:18,986 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 105 selfloop transitions, 62 changer transitions 5/172 dead transitions. [2023-11-17 12:11:18,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 172 transitions, 1859 flow [2023-11-17 12:11:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:11:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:11:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 193 transitions. [2023-11-17 12:11:18,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26805555555555555 [2023-11-17 12:11:18,988 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 193 transitions. [2023-11-17 12:11:18,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 193 transitions. [2023-11-17 12:11:18,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:18,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 193 transitions. [2023-11-17 12:11:18,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.041666666666666) internal successors, (193), 24 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:18,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:18,993 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:18,993 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 743 flow. Second operand 24 states and 193 transitions. [2023-11-17 12:11:18,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 172 transitions, 1859 flow [2023-11-17 12:11:19,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 172 transitions, 1684 flow, removed 54 selfloop flow, removed 7 redundant places. [2023-11-17 12:11:19,005 INFO L231 Difference]: Finished difference. Result has 111 places, 116 transitions, 1386 flow [2023-11-17 12:11:19,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1386, PETRI_PLACES=111, PETRI_TRANSITIONS=116} [2023-11-17 12:11:19,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2023-11-17 12:11:19,005 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 116 transitions, 1386 flow [2023-11-17 12:11:19,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:19,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:19,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:19,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-17 12:11:19,211 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 12:11:19,211 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:19,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:19,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1406206317, now seen corresponding path program 13 times [2023-11-17 12:11:19,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:19,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523471830] [2023-11-17 12:11:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:19,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:19,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:19,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523471830] [2023-11-17 12:11:19,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523471830] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:19,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932445857] [2023-11-17 12:11:19,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:11:19,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:19,709 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 12:11:19,732 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 12:11:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:19,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:11:19,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:19,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:20,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:20,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-17 12:11:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:20,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932445857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:20,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-11-17 12:11:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346028060] [2023-11-17 12:11:20,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:20,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:11:20,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:20,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:11:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:11:20,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:20,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 116 transitions, 1386 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:20,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:20,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:20,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:20,706 INFO L124 PetriNetUnfolderBase]: 358/624 cut-off events. [2023-11-17 12:11:20,706 INFO L125 PetriNetUnfolderBase]: For 4617/4617 co-relation queries the response was YES. [2023-11-17 12:11:20,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 624 events. 358/624 cut-off events. For 4617/4617 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2431 event pairs, 50 based on Foata normal form. 2/626 useless extension candidates. Maximal degree in co-relation 3781. Up to 466 conditions per place. [2023-11-17 12:11:20,712 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 100 selfloop transitions, 66 changer transitions 2/168 dead transitions. [2023-11-17 12:11:20,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 168 transitions, 2134 flow [2023-11-17 12:11:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:11:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:11:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 158 transitions. [2023-11-17 12:11:20,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2633333333333333 [2023-11-17 12:11:20,714 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 158 transitions. [2023-11-17 12:11:20,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 158 transitions. [2023-11-17 12:11:20,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:20,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 158 transitions. [2023-11-17 12:11:20,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:20,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:20,715 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:20,715 INFO L175 Difference]: Start difference. First operand has 111 places, 116 transitions, 1386 flow. Second operand 20 states and 158 transitions. [2023-11-17 12:11:20,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 168 transitions, 2134 flow [2023-11-17 12:11:20,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 168 transitions, 1957 flow, removed 81 selfloop flow, removed 4 redundant places. [2023-11-17 12:11:20,730 INFO L231 Difference]: Finished difference. Result has 132 places, 132 transitions, 1678 flow [2023-11-17 12:11:20,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1678, PETRI_PLACES=132, PETRI_TRANSITIONS=132} [2023-11-17 12:11:20,730 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 111 predicate places. [2023-11-17 12:11:20,730 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 132 transitions, 1678 flow [2023-11-17 12:11:20,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:20,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:20,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:20,738 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 12:11:20,936 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 12:11:20,936 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:20,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash -544953203, now seen corresponding path program 14 times [2023-11-17 12:11:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084468373] [2023-11-17 12:11:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084468373] [2023-11-17 12:11:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084468373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120059687] [2023-11-17 12:11:21,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:11:21,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:21,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:21,420 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 12:11:21,443 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 12:11:21,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:21,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:21,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:21,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:21,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:21,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:21,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-17 12:11:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120059687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:21,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:21,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-11-17 12:11:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028110213] [2023-11-17 12:11:21,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:21,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:11:21,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:21,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:11:21,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:11:21,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:21,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 132 transitions, 1678 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 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 12:11:21,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:21,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:21,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:22,278 INFO L124 PetriNetUnfolderBase]: 391/680 cut-off events. [2023-11-17 12:11:22,278 INFO L125 PetriNetUnfolderBase]: For 5526/5526 co-relation queries the response was YES. [2023-11-17 12:11:22,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 680 events. 391/680 cut-off events. For 5526/5526 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2744 event pairs, 72 based on Foata normal form. 1/681 useless extension candidates. Maximal degree in co-relation 4359. Up to 539 conditions per place. [2023-11-17 12:11:22,287 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 110 selfloop transitions, 61 changer transitions 1/172 dead transitions. [2023-11-17 12:11:22,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 172 transitions, 2272 flow [2023-11-17 12:11:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:11:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:11:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 154 transitions. [2023-11-17 12:11:22,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25666666666666665 [2023-11-17 12:11:22,288 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 154 transitions. [2023-11-17 12:11:22,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 154 transitions. [2023-11-17 12:11:22,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:22,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 154 transitions. [2023-11-17 12:11:22,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.7) internal successors, (154), 20 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 12:11:22,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:22,290 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:22,290 INFO L175 Difference]: Start difference. First operand has 132 places, 132 transitions, 1678 flow. Second operand 20 states and 154 transitions. [2023-11-17 12:11:22,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 172 transitions, 2272 flow [2023-11-17 12:11:22,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 172 transitions, 2005 flow, removed 100 selfloop flow, removed 11 redundant places. [2023-11-17 12:11:22,307 INFO L231 Difference]: Finished difference. Result has 143 places, 138 transitions, 1691 flow [2023-11-17 12:11:22,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1691, PETRI_PLACES=143, PETRI_TRANSITIONS=138} [2023-11-17 12:11:22,307 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-11-17 12:11:22,307 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 138 transitions, 1691 flow [2023-11-17 12:11:22,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 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 12:11:22,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:22,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:22,314 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 12:11:22,514 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 12:11:22,514 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:22,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1447358285, now seen corresponding path program 15 times [2023-11-17 12:11:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:22,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791573726] [2023-11-17 12:11:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:22,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:22,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791573726] [2023-11-17 12:11:22,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791573726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:22,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17127949] [2023-11-17 12:11:22,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:22,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:22,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:22,878 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 12:11:22,903 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 12:11:22,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:11:22,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:22,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:22,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:23,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:23,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:23,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:23,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17127949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:23,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:23,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 18 [2023-11-17 12:11:23,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391611137] [2023-11-17 12:11:23,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:23,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:11:23,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:23,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:11:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:11:23,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:23,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 138 transitions, 1691 flow. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:23,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:23,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:23,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:23,592 INFO L124 PetriNetUnfolderBase]: 469/814 cut-off events. [2023-11-17 12:11:23,592 INFO L125 PetriNetUnfolderBase]: For 8372/8372 co-relation queries the response was YES. [2023-11-17 12:11:23,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5491 conditions, 814 events. 469/814 cut-off events. For 8372/8372 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3487 event pairs, 70 based on Foata normal form. 2/816 useless extension candidates. Maximal degree in co-relation 5364. Up to 651 conditions per place. [2023-11-17 12:11:23,598 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 148 selfloop transitions, 46 changer transitions 2/196 dead transitions. [2023-11-17 12:11:23,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 196 transitions, 2632 flow [2023-11-17 12:11:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:11:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:11:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 145 transitions. [2023-11-17 12:11:23,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26851851851851855 [2023-11-17 12:11:23,599 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 145 transitions. [2023-11-17 12:11:23,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 145 transitions. [2023-11-17 12:11:23,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:23,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 145 transitions. [2023-11-17 12:11:23,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:23,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 30.0) internal successors, (570), 19 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:23,601 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 30.0) internal successors, (570), 19 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:23,601 INFO L175 Difference]: Start difference. First operand has 143 places, 138 transitions, 1691 flow. Second operand 18 states and 145 transitions. [2023-11-17 12:11:23,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 196 transitions, 2632 flow [2023-11-17 12:11:23,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 196 transitions, 2489 flow, removed 39 selfloop flow, removed 15 redundant places. [2023-11-17 12:11:23,621 INFO L231 Difference]: Finished difference. Result has 150 places, 155 transitions, 2046 flow [2023-11-17 12:11:23,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2046, PETRI_PLACES=150, PETRI_TRANSITIONS=155} [2023-11-17 12:11:23,622 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-11-17 12:11:23,622 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 155 transitions, 2046 flow [2023-11-17 12:11:23,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:23,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:23,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:23,630 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 12:11:23,827 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 12:11:23,828 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:23,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash -474912841, now seen corresponding path program 16 times [2023-11-17 12:11:23,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:23,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783694741] [2023-11-17 12:11:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:23,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:24,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:24,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783694741] [2023-11-17 12:11:24,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783694741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:24,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301109003] [2023-11-17 12:11:24,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:11:24,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:24,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:24,163 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 12:11:24,187 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 12:11:24,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:11:24,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:24,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:24,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:24,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:24,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:24,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:24,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301109003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:24,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:24,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 19 [2023-11-17 12:11:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637393339] [2023-11-17 12:11:24,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:24,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:11:24,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:24,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:11:24,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:11:24,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:24,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 155 transitions, 2046 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 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 12:11:24,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:24,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:24,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:24,854 INFO L124 PetriNetUnfolderBase]: 524/905 cut-off events. [2023-11-17 12:11:24,854 INFO L125 PetriNetUnfolderBase]: For 10796/10796 co-relation queries the response was YES. [2023-11-17 12:11:24,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6456 conditions, 905 events. 524/905 cut-off events. For 10796/10796 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3948 event pairs, 90 based on Foata normal form. 2/907 useless extension candidates. Maximal degree in co-relation 6320. Up to 776 conditions per place. [2023-11-17 12:11:24,865 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 145 selfloop transitions, 49 changer transitions 2/196 dead transitions. [2023-11-17 12:11:24,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 196 transitions, 2896 flow [2023-11-17 12:11:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:11:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:11:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2023-11-17 12:11:24,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2549019607843137 [2023-11-17 12:11:24,868 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 130 transitions. [2023-11-17 12:11:24,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 130 transitions. [2023-11-17 12:11:24,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:24,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 130 transitions. [2023-11-17 12:11:24,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.647058823529412) internal successors, (130), 17 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:24,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 30.0) internal successors, (540), 18 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:24,874 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 30.0) internal successors, (540), 18 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:24,874 INFO L175 Difference]: Start difference. First operand has 150 places, 155 transitions, 2046 flow. Second operand 17 states and 130 transitions. [2023-11-17 12:11:24,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 196 transitions, 2896 flow [2023-11-17 12:11:24,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 196 transitions, 2505 flow, removed 170 selfloop flow, removed 8 redundant places. [2023-11-17 12:11:24,901 INFO L231 Difference]: Finished difference. Result has 163 places, 168 transitions, 2110 flow [2023-11-17 12:11:24,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2110, PETRI_PLACES=163, PETRI_TRANSITIONS=168} [2023-11-17 12:11:24,901 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-11-17 12:11:24,901 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 168 transitions, 2110 flow [2023-11-17 12:11:24,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 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 12:11:24,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:24,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:24,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 12:11:25,102 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 12:11:25,102 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:25,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash 206985359, now seen corresponding path program 17 times [2023-11-17 12:11:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:25,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144956396] [2023-11-17 12:11:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:25,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:25,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:25,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144956396] [2023-11-17 12:11:25,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144956396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:25,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051419176] [2023-11-17 12:11:25,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:11:25,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:25,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:25,344 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 12:11:25,371 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 12:11:25,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:25,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:25,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:11:25,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:25,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:25,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:25,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051419176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:25,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:25,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 22 [2023-11-17 12:11:25,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573030669] [2023-11-17 12:11:25,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:25,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:11:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:11:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:11:25,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:25,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 168 transitions, 2110 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:25,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:25,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:25,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:26,044 INFO L124 PetriNetUnfolderBase]: 590/1017 cut-off events. [2023-11-17 12:11:26,044 INFO L125 PetriNetUnfolderBase]: For 13950/13950 co-relation queries the response was YES. [2023-11-17 12:11:26,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7322 conditions, 1017 events. 590/1017 cut-off events. For 13950/13950 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4597 event pairs, 102 based on Foata normal form. 2/1019 useless extension candidates. Maximal degree in co-relation 7174. Up to 879 conditions per place. [2023-11-17 12:11:26,055 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 176 selfloop transitions, 45 changer transitions 2/223 dead transitions. [2023-11-17 12:11:26,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 223 transitions, 3207 flow [2023-11-17 12:11:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:11:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:11:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 160 transitions. [2023-11-17 12:11:26,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25396825396825395 [2023-11-17 12:11:26,057 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 160 transitions. [2023-11-17 12:11:26,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 160 transitions. [2023-11-17 12:11:26,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:26,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 160 transitions. [2023-11-17 12:11:26,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:26,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:26,060 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:26,060 INFO L175 Difference]: Start difference. First operand has 163 places, 168 transitions, 2110 flow. Second operand 21 states and 160 transitions. [2023-11-17 12:11:26,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 223 transitions, 3207 flow [2023-11-17 12:11:26,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 223 transitions, 2938 flow, removed 109 selfloop flow, removed 10 redundant places. [2023-11-17 12:11:26,086 INFO L231 Difference]: Finished difference. Result has 178 places, 185 transitions, 2404 flow [2023-11-17 12:11:26,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2404, PETRI_PLACES=178, PETRI_TRANSITIONS=185} [2023-11-17 12:11:26,087 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2023-11-17 12:11:26,087 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 185 transitions, 2404 flow [2023-11-17 12:11:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:26,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:26,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:26,092 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 12:11:26,287 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 12:11:26,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:26,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash -876064241, now seen corresponding path program 18 times [2023-11-17 12:11:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:26,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199952243] [2023-11-17 12:11:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:26,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:26,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:26,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199952243] [2023-11-17 12:11:26,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199952243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:26,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362616524] [2023-11-17 12:11:26,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:11:26,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:26,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:26,728 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 12:11:26,752 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 12:11:26,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:11:26,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:26,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:26,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:26,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:27,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:27,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362616524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:27,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:27,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-11-17 12:11:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395053372] [2023-11-17 12:11:27,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:27,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:11:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:11:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:11:27,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:27,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 185 transitions, 2404 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 12:11:27,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:27,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:27,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:27,649 INFO L124 PetriNetUnfolderBase]: 651/1118 cut-off events. [2023-11-17 12:11:27,649 INFO L125 PetriNetUnfolderBase]: For 17093/17093 co-relation queries the response was YES. [2023-11-17 12:11:27,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8359 conditions, 1118 events. 651/1118 cut-off events. For 17093/17093 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5148 event pairs, 122 based on Foata normal form. 2/1120 useless extension candidates. Maximal degree in co-relation 8201. Up to 981 conditions per place. [2023-11-17 12:11:27,659 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 185 selfloop transitions, 50 changer transitions 2/237 dead transitions. [2023-11-17 12:11:27,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 237 transitions, 3457 flow [2023-11-17 12:11:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:11:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:11:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 159 transitions. [2023-11-17 12:11:27,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.265 [2023-11-17 12:11:27,660 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 159 transitions. [2023-11-17 12:11:27,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 159 transitions. [2023-11-17 12:11:27,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:27,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 159 transitions. [2023-11-17 12:11:27,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.95) internal successors, (159), 20 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:27,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:27,662 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:27,662 INFO L175 Difference]: Start difference. First operand has 178 places, 185 transitions, 2404 flow. Second operand 20 states and 159 transitions. [2023-11-17 12:11:27,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 237 transitions, 3457 flow [2023-11-17 12:11:27,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 237 transitions, 3084 flow, removed 166 selfloop flow, removed 12 redundant places. [2023-11-17 12:11:27,694 INFO L231 Difference]: Finished difference. Result has 190 places, 198 transitions, 2547 flow [2023-11-17 12:11:27,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2547, PETRI_PLACES=190, PETRI_TRANSITIONS=198} [2023-11-17 12:11:27,694 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 169 predicate places. [2023-11-17 12:11:27,694 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 198 transitions, 2547 flow [2023-11-17 12:11:27,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 12:11:27,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:27,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:27,699 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 12:11:27,895 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 12:11:27,895 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:27,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash 31017885, now seen corresponding path program 19 times [2023-11-17 12:11:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501026324] [2023-11-17 12:11:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:28,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:28,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501026324] [2023-11-17 12:11:28,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501026324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:28,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753256754] [2023-11-17 12:11:28,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:11:28,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:28,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:28,207 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:28,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 12:11:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:28,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:11:28,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:28,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:28,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:28,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:28,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753256754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:28,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:28,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2023-11-17 12:11:28,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463050319] [2023-11-17 12:11:28,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:28,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:11:28,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:11:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:11:28,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 198 transitions, 2547 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 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 12:11:28,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:28,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:28,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:28,956 INFO L124 PetriNetUnfolderBase]: 696/1190 cut-off events. [2023-11-17 12:11:28,956 INFO L125 PetriNetUnfolderBase]: For 22585/22585 co-relation queries the response was YES. [2023-11-17 12:11:28,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9225 conditions, 1190 events. 696/1190 cut-off events. For 22585/22585 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5561 event pairs, 140 based on Foata normal form. 1/1191 useless extension candidates. Maximal degree in co-relation 9058. Up to 1081 conditions per place. [2023-11-17 12:11:28,968 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 190 selfloop transitions, 42 changer transitions 1/233 dead transitions. [2023-11-17 12:11:28,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 233 transitions, 3506 flow [2023-11-17 12:11:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:11:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:11:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 112 transitions. [2023-11-17 12:11:28,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24888888888888888 [2023-11-17 12:11:28,973 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 112 transitions. [2023-11-17 12:11:28,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 112 transitions. [2023-11-17 12:11:28,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:28,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 112 transitions. [2023-11-17 12:11:28,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 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 12:11:28,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:28,978 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:28,978 INFO L175 Difference]: Start difference. First operand has 190 places, 198 transitions, 2547 flow. Second operand 15 states and 112 transitions. [2023-11-17 12:11:28,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 233 transitions, 3506 flow [2023-11-17 12:11:29,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 233 transitions, 3196 flow, removed 131 selfloop flow, removed 13 redundant places. [2023-11-17 12:11:29,014 INFO L231 Difference]: Finished difference. Result has 195 places, 211 transitions, 2736 flow [2023-11-17 12:11:29,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2736, PETRI_PLACES=195, PETRI_TRANSITIONS=211} [2023-11-17 12:11:29,014 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-11-17 12:11:29,014 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 211 transitions, 2736 flow [2023-11-17 12:11:29,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 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 12:11:29,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:29,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:29,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:29,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 12:11:29,220 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:29,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:29,220 INFO L85 PathProgramCache]: Analyzing trace with hash 565322957, now seen corresponding path program 20 times [2023-11-17 12:11:29,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:29,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089753590] [2023-11-17 12:11:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:29,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:29,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:29,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089753590] [2023-11-17 12:11:29,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089753590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:29,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103943130] [2023-11-17 12:11:29,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:11:29,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:29,503 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:29,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 12:11:29,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:29,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:29,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:29,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:29,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:29,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:29,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:29,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103943130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:29,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:29,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-11-17 12:11:29,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934629112] [2023-11-17 12:11:29,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:29,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:11:29,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:11:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:11:29,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:29,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 211 transitions, 2736 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:29,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:29,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:29,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:30,315 INFO L124 PetriNetUnfolderBase]: 744/1272 cut-off events. [2023-11-17 12:11:30,315 INFO L125 PetriNetUnfolderBase]: For 29782/29782 co-relation queries the response was YES. [2023-11-17 12:11:30,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10333 conditions, 1272 events. 744/1272 cut-off events. For 29782/29782 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6029 event pairs, 140 based on Foata normal form. 2/1274 useless extension candidates. Maximal degree in co-relation 10156. Up to 1143 conditions per place. [2023-11-17 12:11:30,326 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 199 selfloop transitions, 50 changer transitions 2/251 dead transitions. [2023-11-17 12:11:30,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 251 transitions, 3759 flow [2023-11-17 12:11:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:11:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:11:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 151 transitions. [2023-11-17 12:11:30,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25166666666666665 [2023-11-17 12:11:30,329 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 151 transitions. [2023-11-17 12:11:30,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 151 transitions. [2023-11-17 12:11:30,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:30,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 151 transitions. [2023-11-17 12:11:30,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.55) internal successors, (151), 20 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 12:11:30,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:30,331 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:30,331 INFO L175 Difference]: Start difference. First operand has 195 places, 211 transitions, 2736 flow. Second operand 20 states and 151 transitions. [2023-11-17 12:11:30,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 251 transitions, 3759 flow [2023-11-17 12:11:30,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 251 transitions, 3372 flow, removed 172 selfloop flow, removed 8 redundant places. [2023-11-17 12:11:30,377 INFO L231 Difference]: Finished difference. Result has 210 places, 220 transitions, 2781 flow [2023-11-17 12:11:30,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2781, PETRI_PLACES=210, PETRI_TRANSITIONS=220} [2023-11-17 12:11:30,377 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2023-11-17 12:11:30,377 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 220 transitions, 2781 flow [2023-11-17 12:11:30,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:30,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:30,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:30,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:30,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:30,582 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:30,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash -696764851, now seen corresponding path program 21 times [2023-11-17 12:11:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37749760] [2023-11-17 12:11:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:30,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:30,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37749760] [2023-11-17 12:11:30,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37749760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:30,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112211146] [2023-11-17 12:11:30,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:30,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:30,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:30,809 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:30,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 12:11:30,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:11:30,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:30,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:30,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:30,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:31,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:31,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-17 12:11:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:31,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112211146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:31,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:31,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-11-17 12:11:31,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486814462] [2023-11-17 12:11:31,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:31,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:11:31,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:11:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:11:31,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:31,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 220 transitions, 2781 flow. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:31,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:31,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:31,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:31,410 INFO L124 PetriNetUnfolderBase]: 772/1321 cut-off events. [2023-11-17 12:11:31,410 INFO L125 PetriNetUnfolderBase]: For 32810/32810 co-relation queries the response was YES. [2023-11-17 12:11:31,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10659 conditions, 1321 events. 772/1321 cut-off events. For 32810/32810 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6318 event pairs, 155 based on Foata normal form. 1/1322 useless extension candidates. Maximal degree in co-relation 10473. Up to 1217 conditions per place. [2023-11-17 12:11:31,421 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 205 selfloop transitions, 35 changer transitions 1/241 dead transitions. [2023-11-17 12:11:31,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 241 transitions, 3590 flow [2023-11-17 12:11:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:11:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:11:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2023-11-17 12:11:31,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2814814814814815 [2023-11-17 12:11:31,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 76 transitions. [2023-11-17 12:11:31,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 76 transitions. [2023-11-17 12:11:31,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:31,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 76 transitions. [2023-11-17 12:11:31,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:31,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:31,424 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:31,424 INFO L175 Difference]: Start difference. First operand has 210 places, 220 transitions, 2781 flow. Second operand 9 states and 76 transitions. [2023-11-17 12:11:31,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 241 transitions, 3590 flow [2023-11-17 12:11:31,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 241 transitions, 3315 flow, removed 100 selfloop flow, removed 16 redundant places. [2023-11-17 12:11:31,479 INFO L231 Difference]: Finished difference. Result has 205 places, 226 transitions, 2798 flow [2023-11-17 12:11:31,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2798, PETRI_PLACES=205, PETRI_TRANSITIONS=226} [2023-11-17 12:11:31,480 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-11-17 12:11:31,480 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 226 transitions, 2798 flow [2023-11-17 12:11:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:31,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:31,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:31,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:31,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:31,695 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:31,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash 232277907, now seen corresponding path program 22 times [2023-11-17 12:11:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:31,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384957145] [2023-11-17 12:11:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:31,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384957145] [2023-11-17 12:11:31,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384957145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113810453] [2023-11-17 12:11:31,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:11:31,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:31,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:31,978 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:31,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 12:11:32,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:11:32,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:32,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:32,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:32,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:32,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:32,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-17 12:11:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:32,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113810453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:32,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:32,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-11-17 12:11:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107901036] [2023-11-17 12:11:32,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:32,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:11:32,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:11:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:11:32,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:32,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 226 transitions, 2798 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:32,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:32,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:32,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:32,850 INFO L124 PetriNetUnfolderBase]: 811/1383 cut-off events. [2023-11-17 12:11:32,850 INFO L125 PetriNetUnfolderBase]: For 34881/34881 co-relation queries the response was YES. [2023-11-17 12:11:32,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11257 conditions, 1383 events. 811/1383 cut-off events. For 34881/34881 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6730 event pairs, 158 based on Foata normal form. 1/1384 useless extension candidates. Maximal degree in co-relation 11067. Up to 1269 conditions per place. [2023-11-17 12:11:32,864 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 214 selfloop transitions, 49 changer transitions 1/264 dead transitions. [2023-11-17 12:11:32,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 264 transitions, 3901 flow [2023-11-17 12:11:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:11:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:11:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 144 transitions. [2023-11-17 12:11:32,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24 [2023-11-17 12:11:32,867 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 144 transitions. [2023-11-17 12:11:32,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 144 transitions. [2023-11-17 12:11:32,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:32,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 144 transitions. [2023-11-17 12:11:32,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:32,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:32,868 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:32,868 INFO L175 Difference]: Start difference. First operand has 205 places, 226 transitions, 2798 flow. Second operand 20 states and 144 transitions. [2023-11-17 12:11:32,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 264 transitions, 3901 flow [2023-11-17 12:11:32,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 264 transitions, 3765 flow, removed 52 selfloop flow, removed 4 redundant places. [2023-11-17 12:11:32,920 INFO L231 Difference]: Finished difference. Result has 224 places, 239 transitions, 3240 flow [2023-11-17 12:11:32,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2662, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3240, PETRI_PLACES=224, PETRI_TRANSITIONS=239} [2023-11-17 12:11:32,921 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2023-11-17 12:11:32,921 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 239 transitions, 3240 flow [2023-11-17 12:11:32,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:32,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:32,921 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:32,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-17 12:11:33,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 12:11:33,122 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:33,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1779814451, now seen corresponding path program 23 times [2023-11-17 12:11:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:33,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680660975] [2023-11-17 12:11:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:33,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680660975] [2023-11-17 12:11:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680660975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340593624] [2023-11-17 12:11:33,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:11:33,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:33,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:33,568 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:33,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 12:11:33,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:11:33,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:33,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:33,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:33,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:33,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:33,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-17 12:11:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:33,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340593624] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:33,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:33,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-11-17 12:11:33,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107276128] [2023-11-17 12:11:33,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:33,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:11:33,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:33,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:11:33,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:11:33,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:33,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 239 transitions, 3240 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 12:11:33,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:33,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:33,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:34,613 INFO L124 PetriNetUnfolderBase]: 865/1475 cut-off events. [2023-11-17 12:11:34,613 INFO L125 PetriNetUnfolderBase]: For 47543/47543 co-relation queries the response was YES. [2023-11-17 12:11:34,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13122 conditions, 1475 events. 865/1475 cut-off events. For 47543/47543 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7263 event pairs, 164 based on Foata normal form. 2/1477 useless extension candidates. Maximal degree in co-relation 12922. Up to 1325 conditions per place. [2023-11-17 12:11:34,627 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 226 selfloop transitions, 56 changer transitions 2/284 dead transitions. [2023-11-17 12:11:34,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 284 transitions, 4425 flow [2023-11-17 12:11:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:11:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:11:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 162 transitions. [2023-11-17 12:11:34,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2571428571428571 [2023-11-17 12:11:34,637 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 162 transitions. [2023-11-17 12:11:34,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 162 transitions. [2023-11-17 12:11:34,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:34,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 162 transitions. [2023-11-17 12:11:34,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.714285714285714) internal successors, (162), 21 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:34,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:34,638 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:34,638 INFO L175 Difference]: Start difference. First operand has 224 places, 239 transitions, 3240 flow. Second operand 21 states and 162 transitions. [2023-11-17 12:11:34,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 284 transitions, 4425 flow [2023-11-17 12:11:34,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 284 transitions, 4003 flow, removed 179 selfloop flow, removed 14 redundant places. [2023-11-17 12:11:34,718 INFO L231 Difference]: Finished difference. Result has 234 places, 248 transitions, 3315 flow [2023-11-17 12:11:34,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3315, PETRI_PLACES=234, PETRI_TRANSITIONS=248} [2023-11-17 12:11:34,723 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-11-17 12:11:34,723 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 248 transitions, 3315 flow [2023-11-17 12:11:34,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 12:11:34,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:34,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:34,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:34,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 12:11:34,928 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:34,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1457283237, now seen corresponding path program 24 times [2023-11-17 12:11:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:34,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625550654] [2023-11-17 12:11:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:35,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:35,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625550654] [2023-11-17 12:11:35,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625550654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:35,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050354138] [2023-11-17 12:11:35,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:11:35,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:35,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:35,238 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:35,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 12:11:35,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:11:35,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:35,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:35,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:35,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:35,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:35,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-17 12:11:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:35,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050354138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:35,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:35,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 18 [2023-11-17 12:11:35,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269291806] [2023-11-17 12:11:35,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:35,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:11:35,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:35,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:11:35,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:11:35,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:35,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 248 transitions, 3315 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:35,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:35,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:35,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:35,985 INFO L124 PetriNetUnfolderBase]: 905/1544 cut-off events. [2023-11-17 12:11:35,985 INFO L125 PetriNetUnfolderBase]: For 54970/54970 co-relation queries the response was YES. [2023-11-17 12:11:35,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13943 conditions, 1544 events. 905/1544 cut-off events. For 54970/54970 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7728 event pairs, 150 based on Foata normal form. 1/1545 useless extension candidates. Maximal degree in co-relation 13737. Up to 1414 conditions per place. [2023-11-17 12:11:36,002 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 230 selfloop transitions, 44 changer transitions 1/275 dead transitions. [2023-11-17 12:11:36,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 275 transitions, 4348 flow [2023-11-17 12:11:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:11:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:11:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 97 transitions. [2023-11-17 12:11:36,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24871794871794872 [2023-11-17 12:11:36,005 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 97 transitions. [2023-11-17 12:11:36,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 97 transitions. [2023-11-17 12:11:36,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:36,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 97 transitions. [2023-11-17 12:11:36,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:36,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:36,006 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:36,006 INFO L175 Difference]: Start difference. First operand has 234 places, 248 transitions, 3315 flow. Second operand 13 states and 97 transitions. [2023-11-17 12:11:36,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 275 transitions, 4348 flow [2023-11-17 12:11:36,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 275 transitions, 4054 flow, removed 115 selfloop flow, removed 15 redundant places. [2023-11-17 12:11:36,100 INFO L231 Difference]: Finished difference. Result has 234 places, 257 transitions, 3431 flow [2023-11-17 12:11:36,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3431, PETRI_PLACES=234, PETRI_TRANSITIONS=257} [2023-11-17 12:11:36,100 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-11-17 12:11:36,100 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 257 transitions, 3431 flow [2023-11-17 12:11:36,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:36,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:36,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:36,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:36,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 12:11:36,307 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:36,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1247221157, now seen corresponding path program 25 times [2023-11-17 12:11:36,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:36,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119624168] [2023-11-17 12:11:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:36,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:36,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119624168] [2023-11-17 12:11:36,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119624168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:36,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465874686] [2023-11-17 12:11:36,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:11:36,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:36,696 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:36,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 12:11:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:36,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:11:36,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:36,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:36,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:36,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:37,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465874686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:37,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:37,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-11-17 12:11:37,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543778536] [2023-11-17 12:11:37,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:37,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:11:37,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:11:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:11:37,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:37,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 257 transitions, 3431 flow. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:37,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:37,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:37,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:37,614 INFO L124 PetriNetUnfolderBase]: 965/1646 cut-off events. [2023-11-17 12:11:37,614 INFO L125 PetriNetUnfolderBase]: For 61364/61364 co-relation queries the response was YES. [2023-11-17 12:11:37,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15114 conditions, 1646 events. 965/1646 cut-off events. For 61364/61364 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8389 event pairs, 190 based on Foata normal form. 2/1648 useless extension candidates. Maximal degree in co-relation 14903. Up to 1508 conditions per place. [2023-11-17 12:11:37,632 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 260 selfloop transitions, 45 changer transitions 2/307 dead transitions. [2023-11-17 12:11:37,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 307 transitions, 5005 flow [2023-11-17 12:11:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:11:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:11:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 156 transitions. [2023-11-17 12:11:37,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24761904761904763 [2023-11-17 12:11:37,637 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 156 transitions. [2023-11-17 12:11:37,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 156 transitions. [2023-11-17 12:11:37,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:37,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 156 transitions. [2023-11-17 12:11:37,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.428571428571429) internal successors, (156), 21 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:37,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:37,639 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:37,639 INFO L175 Difference]: Start difference. First operand has 234 places, 257 transitions, 3431 flow. Second operand 21 states and 156 transitions. [2023-11-17 12:11:37,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 307 transitions, 5005 flow [2023-11-17 12:11:37,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 307 transitions, 4682 flow, removed 134 selfloop flow, removed 10 redundant places. [2023-11-17 12:11:37,732 INFO L231 Difference]: Finished difference. Result has 249 places, 273 transitions, 3874 flow [2023-11-17 12:11:37,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3874, PETRI_PLACES=249, PETRI_TRANSITIONS=273} [2023-11-17 12:11:37,734 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2023-11-17 12:11:37,734 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 273 transitions, 3874 flow [2023-11-17 12:11:37,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:37,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:37,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:37,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:37,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:37,939 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:37,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:37,940 INFO L85 PathProgramCache]: Analyzing trace with hash -407122487, now seen corresponding path program 26 times [2023-11-17 12:11:37,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:37,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590518958] [2023-11-17 12:11:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:37,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:38,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590518958] [2023-11-17 12:11:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590518958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:38,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360435459] [2023-11-17 12:11:38,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:11:38,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:38,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:38,174 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:38,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 12:11:38,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:38,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:38,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:11:38,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:38,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:38,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:38,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:38,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360435459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:38,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:38,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 21 [2023-11-17 12:11:38,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095213245] [2023-11-17 12:11:38,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:11:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:11:38,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:11:38,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:38,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 273 transitions, 3874 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:38,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:38,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:38,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:39,065 INFO L124 PetriNetUnfolderBase]: 1044/1786 cut-off events. [2023-11-17 12:11:39,065 INFO L125 PetriNetUnfolderBase]: For 73549/73549 co-relation queries the response was YES. [2023-11-17 12:11:39,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17098 conditions, 1786 events. 1044/1786 cut-off events. For 73549/73549 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9359 event pairs, 210 based on Foata normal form. 2/1788 useless extension candidates. Maximal degree in co-relation 16880. Up to 1604 conditions per place. [2023-11-17 12:11:39,079 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 279 selfloop transitions, 51 changer transitions 2/332 dead transitions. [2023-11-17 12:11:39,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 332 transitions, 5422 flow [2023-11-17 12:11:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:11:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:11:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 166 transitions. [2023-11-17 12:11:39,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2634920634920635 [2023-11-17 12:11:39,080 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 166 transitions. [2023-11-17 12:11:39,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 166 transitions. [2023-11-17 12:11:39,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:39,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 166 transitions. [2023-11-17 12:11:39,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.904761904761905) internal successors, (166), 21 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:39,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:39,081 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:39,081 INFO L175 Difference]: Start difference. First operand has 249 places, 273 transitions, 3874 flow. Second operand 21 states and 166 transitions. [2023-11-17 12:11:39,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 332 transitions, 5422 flow [2023-11-17 12:11:39,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 332 transitions, 4918 flow, removed 230 selfloop flow, removed 13 redundant places. [2023-11-17 12:11:39,192 INFO L231 Difference]: Finished difference. Result has 260 places, 288 transitions, 4036 flow [2023-11-17 12:11:39,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4036, PETRI_PLACES=260, PETRI_TRANSITIONS=288} [2023-11-17 12:11:39,192 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 239 predicate places. [2023-11-17 12:11:39,193 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 288 transitions, 4036 flow [2023-11-17 12:11:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:39,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:39,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:39,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:39,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:39,395 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:39,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash 164171557, now seen corresponding path program 27 times [2023-11-17 12:11:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:39,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053022428] [2023-11-17 12:11:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:39,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:39,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:39,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053022428] [2023-11-17 12:11:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053022428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:39,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903146105] [2023-11-17 12:11:39,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:39,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:39,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:39,701 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:39,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 12:11:39,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:11:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:39,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:11:39,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:39,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:39,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:39,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-17 12:11:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:40,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903146105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:40,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:40,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2023-11-17 12:11:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118051801] [2023-11-17 12:11:40,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:40,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:11:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:11:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:11:40,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:40,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 288 transitions, 4036 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 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 12:11:40,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:40,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:40,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:40,556 INFO L124 PetriNetUnfolderBase]: 1105/1887 cut-off events. [2023-11-17 12:11:40,557 INFO L125 PetriNetUnfolderBase]: For 83517/83517 co-relation queries the response was YES. [2023-11-17 12:11:40,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18488 conditions, 1887 events. 1105/1887 cut-off events. For 83517/83517 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9959 event pairs, 248 based on Foata normal form. 2/1889 useless extension candidates. Maximal degree in co-relation 18265. Up to 1750 conditions per place. [2023-11-17 12:11:40,576 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 280 selfloop transitions, 49 changer transitions 2/331 dead transitions. [2023-11-17 12:11:40,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 331 transitions, 5543 flow [2023-11-17 12:11:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:11:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:11:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 132 transitions. [2023-11-17 12:11:40,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25882352941176473 [2023-11-17 12:11:40,577 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 132 transitions. [2023-11-17 12:11:40,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 132 transitions. [2023-11-17 12:11:40,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:40,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 132 transitions. [2023-11-17 12:11:40,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.764705882352941) internal successors, (132), 17 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:40,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 30.0) internal successors, (540), 18 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:40,578 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 30.0) internal successors, (540), 18 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:40,578 INFO L175 Difference]: Start difference. First operand has 260 places, 288 transitions, 4036 flow. Second operand 17 states and 132 transitions. [2023-11-17 12:11:40,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 331 transitions, 5543 flow [2023-11-17 12:11:40,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 331 transitions, 5148 flow, removed 174 selfloop flow, removed 13 redundant places. [2023-11-17 12:11:40,722 INFO L231 Difference]: Finished difference. Result has 268 places, 301 transitions, 4359 flow [2023-11-17 12:11:40,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4359, PETRI_PLACES=268, PETRI_TRANSITIONS=301} [2023-11-17 12:11:40,722 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2023-11-17 12:11:40,722 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 301 transitions, 4359 flow [2023-11-17 12:11:40,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 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 12:11:40,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:40,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:40,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:40,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:40,923 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:40,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash 862656777, now seen corresponding path program 28 times [2023-11-17 12:11:40,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:40,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8686412] [2023-11-17 12:11:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:40,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:41,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:41,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8686412] [2023-11-17 12:11:41,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8686412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:41,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605294097] [2023-11-17 12:11:41,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:11:41,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:41,261 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:41,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 12:11:41,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:11:41,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:41,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 12:11:41,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:41,358 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 42 treesize of output 38 [2023-11-17 12:11:41,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:11:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:41,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:41,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:41,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-11-17 12:11:41,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:41,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-17 12:11:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:41,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605294097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:41,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:41,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2023-11-17 12:11:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019238658] [2023-11-17 12:11:41,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:41,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:11:41,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:11:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=698, Unknown=3, NotChecked=0, Total=812 [2023-11-17 12:11:41,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:41,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 301 transitions, 4359 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:41,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:41,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:41,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:42,494 INFO L124 PetriNetUnfolderBase]: 1129/1930 cut-off events. [2023-11-17 12:11:42,494 INFO L125 PetriNetUnfolderBase]: For 95873/95873 co-relation queries the response was YES. [2023-11-17 12:11:42,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19248 conditions, 1930 events. 1129/1930 cut-off events. For 95873/95873 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10300 event pairs, 211 based on Foata normal form. 1/1931 useless extension candidates. Maximal degree in co-relation 19015. Up to 1703 conditions per place. [2023-11-17 12:11:42,514 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 268 selfloop transitions, 67 changer transitions 1/336 dead transitions. [2023-11-17 12:11:42,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 336 transitions, 5462 flow [2023-11-17 12:11:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:11:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:11:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2023-11-17 12:11:42,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27111111111111114 [2023-11-17 12:11:42,515 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 122 transitions. [2023-11-17 12:11:42,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 122 transitions. [2023-11-17 12:11:42,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:42,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 122 transitions. [2023-11-17 12:11:42,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:42,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:42,519 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 30.0) internal successors, (480), 16 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:42,519 INFO L175 Difference]: Start difference. First operand has 268 places, 301 transitions, 4359 flow. Second operand 15 states and 122 transitions. [2023-11-17 12:11:42,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 336 transitions, 5462 flow [2023-11-17 12:11:42,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 336 transitions, 4916 flow, removed 248 selfloop flow, removed 10 redundant places. [2023-11-17 12:11:42,654 INFO L231 Difference]: Finished difference. Result has 275 places, 306 transitions, 4190 flow [2023-11-17 12:11:42,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4190, PETRI_PLACES=275, PETRI_TRANSITIONS=306} [2023-11-17 12:11:42,654 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-11-17 12:11:42,654 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 306 transitions, 4190 flow [2023-11-17 12:11:42,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:42,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:42,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:42,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-17 12:11:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-17 12:11:42,859 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:42,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash 512996623, now seen corresponding path program 29 times [2023-11-17 12:11:42,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:42,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184200713] [2023-11-17 12:11:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:43,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:43,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184200713] [2023-11-17 12:11:43,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184200713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:43,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501882944] [2023-11-17 12:11:43,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:11:43,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:43,177 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:43,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 12:11:43,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:11:43,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:43,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 12:11:43,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:11:43,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:11:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:43,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:43,541 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_877) c_~A~0.base))) (= (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset)) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))))) is different from false [2023-11-17 12:11:43,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:43,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-11-17 12:11:43,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:43,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-17 12:11:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:43,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501882944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:43,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:43,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-11-17 12:11:43,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558978946] [2023-11-17 12:11:43,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:43,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 12:11:43,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 12:11:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=713, Unknown=1, NotChecked=54, Total=870 [2023-11-17 12:11:43,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:43,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 306 transitions, 4190 flow. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:43,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:43,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:43,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:44,450 INFO L124 PetriNetUnfolderBase]: 1173/1999 cut-off events. [2023-11-17 12:11:44,450 INFO L125 PetriNetUnfolderBase]: For 98574/98574 co-relation queries the response was YES. [2023-11-17 12:11:44,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19853 conditions, 1999 events. 1173/1999 cut-off events. For 98574/98574 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 10632 event pairs, 240 based on Foata normal form. 1/2000 useless extension candidates. Maximal degree in co-relation 19611. Up to 1786 conditions per place. [2023-11-17 12:11:44,467 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 267 selfloop transitions, 84 changer transitions 1/352 dead transitions. [2023-11-17 12:11:44,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 352 transitions, 5776 flow [2023-11-17 12:11:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:11:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:11:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 157 transitions. [2023-11-17 12:11:44,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2492063492063492 [2023-11-17 12:11:44,468 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 157 transitions. [2023-11-17 12:11:44,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 157 transitions. [2023-11-17 12:11:44,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:44,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 157 transitions. [2023-11-17 12:11:44,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.476190476190476) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,470 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,470 INFO L175 Difference]: Start difference. First operand has 275 places, 306 transitions, 4190 flow. Second operand 21 states and 157 transitions. [2023-11-17 12:11:44,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 352 transitions, 5776 flow [2023-11-17 12:11:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 352 transitions, 5519 flow, removed 91 selfloop flow, removed 11 redundant places. [2023-11-17 12:11:44,613 INFO L231 Difference]: Finished difference. Result has 288 places, 321 transitions, 4838 flow [2023-11-17 12:11:44,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3933, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4838, PETRI_PLACES=288, PETRI_TRANSITIONS=321} [2023-11-17 12:11:44,614 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-11-17 12:11:44,614 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 321 transitions, 4838 flow [2023-11-17 12:11:44,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:44,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:44,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:44,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:44,815 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:44,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1598611961, now seen corresponding path program 30 times [2023-11-17 12:11:44,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:44,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203936285] [2023-11-17 12:11:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:45,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:45,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203936285] [2023-11-17 12:11:45,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203936285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:45,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768778952] [2023-11-17 12:11:45,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:11:45,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:45,114 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:45,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 12:11:45,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:11:45,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:45,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 12:11:45,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:11:45,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:11:45,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:45,413 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 15 treesize of output 14 [2023-11-17 12:11:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:45,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:45,613 INFO L349 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2023-11-17 12:11:45,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 70 [2023-11-17 12:11:45,627 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-11-17 12:11:45,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2023-11-17 12:11:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:45,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768778952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:45,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:45,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2023-11-17 12:11:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405269086] [2023-11-17 12:11:45,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:45,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 12:11:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 12:11:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=804, Unknown=1, NotChecked=0, Total=930 [2023-11-17 12:11:45,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:45,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 321 transitions, 4838 flow. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:45,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:45,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:45,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:46,862 INFO L124 PetriNetUnfolderBase]: 1240/2126 cut-off events. [2023-11-17 12:11:46,862 INFO L125 PetriNetUnfolderBase]: For 117275/117275 co-relation queries the response was YES. [2023-11-17 12:11:46,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22105 conditions, 2126 events. 1240/2126 cut-off events. For 117275/117275 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11595 event pairs, 246 based on Foata normal form. 2/2128 useless extension candidates. Maximal degree in co-relation 21651. Up to 1799 conditions per place. [2023-11-17 12:11:46,881 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 264 selfloop transitions, 132 changer transitions 8/404 dead transitions. [2023-11-17 12:11:46,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 404 transitions, 7271 flow [2023-11-17 12:11:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:11:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:11:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 213 transitions. [2023-11-17 12:11:46,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24482758620689654 [2023-11-17 12:11:46,882 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 213 transitions. [2023-11-17 12:11:46,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 213 transitions. [2023-11-17 12:11:46,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:46,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 213 transitions. [2023-11-17 12:11:46,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 7.344827586206897) internal successors, (213), 29 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:46,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 30.0) internal successors, (900), 30 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:46,884 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 30.0) internal successors, (900), 30 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:46,884 INFO L175 Difference]: Start difference. First operand has 288 places, 321 transitions, 4838 flow. Second operand 29 states and 213 transitions. [2023-11-17 12:11:46,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 404 transitions, 7271 flow [2023-11-17 12:11:47,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 404 transitions, 6327 flow, removed 427 selfloop flow, removed 15 redundant places. [2023-11-17 12:11:47,064 INFO L231 Difference]: Finished difference. Result has 308 places, 355 transitions, 5540 flow [2023-11-17 12:11:47,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5540, PETRI_PLACES=308, PETRI_TRANSITIONS=355} [2023-11-17 12:11:47,064 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-11-17 12:11:47,064 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 355 transitions, 5540 flow [2023-11-17 12:11:47,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:47,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:47,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:47,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:47,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:47,269 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:47,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:47,269 INFO L85 PathProgramCache]: Analyzing trace with hash -499334202, now seen corresponding path program 31 times [2023-11-17 12:11:47,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:47,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397881377] [2023-11-17 12:11:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:47,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:47,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397881377] [2023-11-17 12:11:47,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397881377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418248304] [2023-11-17 12:11:47,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:11:47,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:47,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:47,345 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:47,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 12:11:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:47,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:11:47,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:47,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:11:47,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418248304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:47,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:47,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 12:11:47,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55779955] [2023-11-17 12:11:47,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:47,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:11:47,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:11:47,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:11:47,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:47,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 355 transitions, 5540 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:47,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:47,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:47,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:48,274 INFO L124 PetriNetUnfolderBase]: 1790/3199 cut-off events. [2023-11-17 12:11:48,274 INFO L125 PetriNetUnfolderBase]: For 209142/209142 co-relation queries the response was YES. [2023-11-17 12:11:48,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33873 conditions, 3199 events. 1790/3199 cut-off events. For 209142/209142 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20426 event pairs, 652 based on Foata normal form. 162/3361 useless extension candidates. Maximal degree in co-relation 33361. Up to 1975 conditions per place. [2023-11-17 12:11:48,309 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 478 selfloop transitions, 73 changer transitions 19/570 dead transitions. [2023-11-17 12:11:48,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 570 transitions, 10330 flow [2023-11-17 12:11:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:11:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:11:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2023-11-17 12:11:48,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3037037037037037 [2023-11-17 12:11:48,310 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 82 transitions. [2023-11-17 12:11:48,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 82 transitions. [2023-11-17 12:11:48,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:48,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 82 transitions. [2023-11-17 12:11:48,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,311 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,311 INFO L175 Difference]: Start difference. First operand has 308 places, 355 transitions, 5540 flow. Second operand 9 states and 82 transitions. [2023-11-17 12:11:48,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 570 transitions, 10330 flow [2023-11-17 12:11:48,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 570 transitions, 8683 flow, removed 742 selfloop flow, removed 20 redundant places. [2023-11-17 12:11:48,734 INFO L231 Difference]: Finished difference. Result has 299 places, 406 transitions, 5677 flow [2023-11-17 12:11:48,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5677, PETRI_PLACES=299, PETRI_TRANSITIONS=406} [2023-11-17 12:11:48,734 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 278 predicate places. [2023-11-17 12:11:48,734 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 406 transitions, 5677 flow [2023-11-17 12:11:48,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:48,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:48,735 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:48,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:48,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-17 12:11:48,935 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:48,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1873607461, now seen corresponding path program 32 times [2023-11-17 12:11:48,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:48,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131245612] [2023-11-17 12:11:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:49,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:49,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131245612] [2023-11-17 12:11:49,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131245612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:49,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849979443] [2023-11-17 12:11:49,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:11:49,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:49,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:49,005 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:49,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 12:11:49,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:11:49,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:49,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:11:49,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:49,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:49,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849979443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:49,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:49,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 12:11:49,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199030309] [2023-11-17 12:11:49,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:49,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:11:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:11:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:11:49,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:49,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 406 transitions, 5677 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:49,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:49,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:49,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:49,951 INFO L124 PetriNetUnfolderBase]: 1502/2817 cut-off events. [2023-11-17 12:11:49,951 INFO L125 PetriNetUnfolderBase]: For 168704/168704 co-relation queries the response was YES. [2023-11-17 12:11:49,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28126 conditions, 2817 events. 1502/2817 cut-off events. For 168704/168704 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18319 event pairs, 614 based on Foata normal form. 158/2975 useless extension candidates. Maximal degree in co-relation 27857. Up to 1975 conditions per place. [2023-11-17 12:11:49,976 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 319 selfloop transitions, 4 changer transitions 140/463 dead transitions. [2023-11-17 12:11:49,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 463 transitions, 7087 flow [2023-11-17 12:11:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:11:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:11:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2023-11-17 12:11:49,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3 [2023-11-17 12:11:49,978 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 81 transitions. [2023-11-17 12:11:49,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 81 transitions. [2023-11-17 12:11:49,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:49,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 81 transitions. [2023-11-17 12:11:49,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:49,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:49,978 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:49,978 INFO L175 Difference]: Start difference. First operand has 299 places, 406 transitions, 5677 flow. Second operand 9 states and 81 transitions. [2023-11-17 12:11:49,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 463 transitions, 7087 flow [2023-11-17 12:11:50,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 463 transitions, 6972 flow, removed 53 selfloop flow, removed 4 redundant places. [2023-11-17 12:11:50,276 INFO L231 Difference]: Finished difference. Result has 306 places, 323 transitions, 4482 flow [2023-11-17 12:11:50,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4482, PETRI_PLACES=306, PETRI_TRANSITIONS=323} [2023-11-17 12:11:50,277 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2023-11-17 12:11:50,277 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 323 transitions, 4482 flow [2023-11-17 12:11:50,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:50,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:50,277 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:50,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-17 12:11:50,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 12:11:50,481 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:50,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1247686094, now seen corresponding path program 33 times [2023-11-17 12:11:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:50,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500227069] [2023-11-17 12:11:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:50,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:50,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500227069] [2023-11-17 12:11:50,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500227069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791476036] [2023-11-17 12:11:50,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:11:50,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:50,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:50,547 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:50,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:11:50,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:11:50,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:50,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:11:50,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:50,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:50,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791476036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:50,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:50,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 12:11:50,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692329030] [2023-11-17 12:11:50,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:50,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:11:50,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:50,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:11:50,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:11:50,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:50,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 323 transitions, 4482 flow. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:50,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:50,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:50,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:51,259 INFO L124 PetriNetUnfolderBase]: 937/1625 cut-off events. [2023-11-17 12:11:51,259 INFO L125 PetriNetUnfolderBase]: For 119586/119586 co-relation queries the response was YES. [2023-11-17 12:11:51,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15813 conditions, 1625 events. 937/1625 cut-off events. For 119586/119586 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8519 event pairs, 197 based on Foata normal form. 208/1833 useless extension candidates. Maximal degree in co-relation 15662. Up to 924 conditions per place. [2023-11-17 12:11:51,275 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 210 selfloop transitions, 109 changer transitions 0/319 dead transitions. [2023-11-17 12:11:51,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 319 transitions, 5393 flow [2023-11-17 12:11:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:11:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:11:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 72 transitions. [2023-11-17 12:11:51,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24 [2023-11-17 12:11:51,276 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 72 transitions. [2023-11-17 12:11:51,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 72 transitions. [2023-11-17 12:11:51,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:51,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 72 transitions. [2023-11-17 12:11:51,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,276 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,276 INFO L175 Difference]: Start difference. First operand has 306 places, 323 transitions, 4482 flow. Second operand 10 states and 72 transitions. [2023-11-17 12:11:51,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 319 transitions, 5393 flow [2023-11-17 12:11:51,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 319 transitions, 4834 flow, removed 226 selfloop flow, removed 24 redundant places. [2023-11-17 12:11:51,445 INFO L231 Difference]: Finished difference. Result has 269 places, 300 transitions, 4147 flow [2023-11-17 12:11:51,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3667, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4147, PETRI_PLACES=269, PETRI_TRANSITIONS=300} [2023-11-17 12:11:51,446 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 248 predicate places. [2023-11-17 12:11:51,446 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 300 transitions, 4147 flow [2023-11-17 12:11:51,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:51,446 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:51,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 12:11:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 12:11:51,651 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:51,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash 584885663, now seen corresponding path program 34 times [2023-11-17 12:11:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:51,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670221930] [2023-11-17 12:11:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:51,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:51,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:51,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670221930] [2023-11-17 12:11:51,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670221930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:51,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683424866] [2023-11-17 12:11:51,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:11:51,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:51,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:51,716 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:51,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:11:51,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:11:51,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:51,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:11:51,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:51,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683424866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:51,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-17 12:11:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880061789] [2023-11-17 12:11:51,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:51,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:11:51,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:11:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:11:51,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:51,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 300 transitions, 4147 flow. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:51,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:51,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:51,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:52,225 INFO L124 PetriNetUnfolderBase]: 725/1267 cut-off events. [2023-11-17 12:11:52,225 INFO L125 PetriNetUnfolderBase]: For 75752/75752 co-relation queries the response was YES. [2023-11-17 12:11:52,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12589 conditions, 1267 events. 725/1267 cut-off events. For 75752/75752 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6114 event pairs, 214 based on Foata normal form. 118/1385 useless extension candidates. Maximal degree in co-relation 12472. Up to 817 conditions per place. [2023-11-17 12:11:52,239 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 190 selfloop transitions, 104 changer transitions 0/294 dead transitions. [2023-11-17 12:11:52,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 294 transitions, 4945 flow [2023-11-17 12:11:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:11:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:11:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 72 transitions. [2023-11-17 12:11:52,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24 [2023-11-17 12:11:52,240 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 72 transitions. [2023-11-17 12:11:52,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 72 transitions. [2023-11-17 12:11:52,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:52,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 72 transitions. [2023-11-17 12:11:52,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:52,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:52,241 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:52,241 INFO L175 Difference]: Start difference. First operand has 269 places, 300 transitions, 4147 flow. Second operand 10 states and 72 transitions. [2023-11-17 12:11:52,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 294 transitions, 4945 flow [2023-11-17 12:11:52,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 294 transitions, 4310 flow, removed 226 selfloop flow, removed 25 redundant places. [2023-11-17 12:11:52,356 INFO L231 Difference]: Finished difference. Result has 249 places, 276 transitions, 3705 flow [2023-11-17 12:11:52,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3705, PETRI_PLACES=249, PETRI_TRANSITIONS=276} [2023-11-17 12:11:52,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2023-11-17 12:11:52,357 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 276 transitions, 3705 flow [2023-11-17 12:11:52,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:52,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:52,357 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:52,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 12:11:52,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:11:52,557 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:52,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:52,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1378456656, now seen corresponding path program 35 times [2023-11-17 12:11:52,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:52,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732734681] [2023-11-17 12:11:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:52,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:52,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:52,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732734681] [2023-11-17 12:11:52,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732734681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:52,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106898506] [2023-11-17 12:11:52,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:11:52,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:52,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:53,000 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:53,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 12:11:53,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:11:53,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:53,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:11:53,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:53,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:53,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:53,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-17 12:11:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:53,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106898506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:53,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:53,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 30 [2023-11-17 12:11:53,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569369734] [2023-11-17 12:11:53,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:53,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:11:53,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:53,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:11:53,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:11:53,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:53,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 276 transitions, 3705 flow. Second operand has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:53,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:53,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:53,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:54,426 INFO L124 PetriNetUnfolderBase]: 805/1408 cut-off events. [2023-11-17 12:11:54,427 INFO L125 PetriNetUnfolderBase]: For 48044/48044 co-relation queries the response was YES. [2023-11-17 12:11:54,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12334 conditions, 1408 events. 805/1408 cut-off events. For 48044/48044 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7003 event pairs, 127 based on Foata normal form. 1/1409 useless extension candidates. Maximal degree in co-relation 12233. Up to 1205 conditions per place. [2023-11-17 12:11:54,440 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 262 selfloop transitions, 79 changer transitions 1/342 dead transitions. [2023-11-17 12:11:54,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 342 transitions, 5265 flow [2023-11-17 12:11:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:11:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:11:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 166 transitions. [2023-11-17 12:11:54,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2634920634920635 [2023-11-17 12:11:54,441 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 166 transitions. [2023-11-17 12:11:54,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 166 transitions. [2023-11-17 12:11:54,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:54,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 166 transitions. [2023-11-17 12:11:54,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.904761904761905) internal successors, (166), 21 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:54,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:54,442 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:54,442 INFO L175 Difference]: Start difference. First operand has 249 places, 276 transitions, 3705 flow. Second operand 21 states and 166 transitions. [2023-11-17 12:11:54,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 342 transitions, 5265 flow [2023-11-17 12:11:54,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 342 transitions, 4942 flow, removed 85 selfloop flow, removed 15 redundant places. [2023-11-17 12:11:54,526 INFO L231 Difference]: Finished difference. Result has 261 places, 300 transitions, 4243 flow [2023-11-17 12:11:54,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4243, PETRI_PLACES=261, PETRI_TRANSITIONS=300} [2023-11-17 12:11:54,526 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-11-17 12:11:54,526 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 300 transitions, 4243 flow [2023-11-17 12:11:54,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.875) internal successors, (156), 32 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:54,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:54,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:54,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-17 12:11:54,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 12:11:54,730 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:54,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:54,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1057839238, now seen corresponding path program 36 times [2023-11-17 12:11:54,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:54,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084027836] [2023-11-17 12:11:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:54,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:55,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:55,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084027836] [2023-11-17 12:11:55,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084027836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:55,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9364791] [2023-11-17 12:11:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:11:55,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:55,275 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:55,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 12:11:55,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:11:55,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:55,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:11:55,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:55,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:55,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:55,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-17 12:11:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9364791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:55,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2023-11-17 12:11:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657711931] [2023-11-17 12:11:55,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:55,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:11:55,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:11:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:11:55,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:55,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 300 transitions, 4243 flow. Second operand has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:55,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:55,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:55,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:56,901 INFO L124 PetriNetUnfolderBase]: 845/1479 cut-off events. [2023-11-17 12:11:56,902 INFO L125 PetriNetUnfolderBase]: For 45672/45672 co-relation queries the response was YES. [2023-11-17 12:11:56,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12827 conditions, 1479 events. 845/1479 cut-off events. For 45672/45672 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7501 event pairs, 163 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 12726. Up to 1306 conditions per place. [2023-11-17 12:11:56,917 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 269 selfloop transitions, 78 changer transitions 1/348 dead transitions. [2023-11-17 12:11:56,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 348 transitions, 5565 flow [2023-11-17 12:11:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:11:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:11:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 181 transitions. [2023-11-17 12:11:56,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24133333333333334 [2023-11-17 12:11:56,920 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 181 transitions. [2023-11-17 12:11:56,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 181 transitions. [2023-11-17 12:11:56,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:56,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 181 transitions. [2023-11-17 12:11:56,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 7.24) internal successors, (181), 25 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:56,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 30.0) internal successors, (780), 26 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:56,921 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 30.0) internal successors, (780), 26 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:56,922 INFO L175 Difference]: Start difference. First operand has 261 places, 300 transitions, 4243 flow. Second operand 25 states and 181 transitions. [2023-11-17 12:11:56,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 348 transitions, 5565 flow [2023-11-17 12:11:57,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 348 transitions, 5166 flow, removed 184 selfloop flow, removed 8 redundant places. [2023-11-17 12:11:57,022 INFO L231 Difference]: Finished difference. Result has 281 places, 308 transitions, 4434 flow [2023-11-17 12:11:57,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4434, PETRI_PLACES=281, PETRI_TRANSITIONS=308} [2023-11-17 12:11:57,022 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2023-11-17 12:11:57,022 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 308 transitions, 4434 flow [2023-11-17 12:11:57,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:57,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:57,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:57,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-17 12:11:57,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-17 12:11:57,225 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:11:57,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1187881210, now seen corresponding path program 37 times [2023-11-17 12:11:57,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:57,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723025019] [2023-11-17 12:11:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:11:57,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:57,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723025019] [2023-11-17 12:11:57,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723025019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:57,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668954246] [2023-11-17 12:11:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:11:57,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:57,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:57,760 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:11:57,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 12:11:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:57,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:11:57,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:11:58,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:58,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:11:58,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-17 12:11:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:58,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668954246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:58,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:58,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-11-17 12:11:58,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556091347] [2023-11-17 12:11:58,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:58,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:11:58,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:58,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:11:58,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:11:58,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:11:58,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 308 transitions, 4434 flow. Second operand has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:58,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:58,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:11:58,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:59,886 INFO L124 PetriNetUnfolderBase]: 941/1633 cut-off events. [2023-11-17 12:11:59,886 INFO L125 PetriNetUnfolderBase]: For 60336/60336 co-relation queries the response was YES. [2023-11-17 12:11:59,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14990 conditions, 1633 events. 941/1633 cut-off events. For 60336/60336 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8378 event pairs, 170 based on Foata normal form. 2/1635 useless extension candidates. Maximal degree in co-relation 14884. Up to 1440 conditions per place. [2023-11-17 12:11:59,903 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 292 selfloop transitions, 95 changer transitions 2/389 dead transitions. [2023-11-17 12:11:59,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 389 transitions, 6968 flow [2023-11-17 12:11:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:11:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:11:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 226 transitions. [2023-11-17 12:11:59,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24301075268817204 [2023-11-17 12:11:59,904 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 226 transitions. [2023-11-17 12:11:59,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 226 transitions. [2023-11-17 12:11:59,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:59,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 226 transitions. [2023-11-17 12:11:59,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.290322580645161) internal successors, (226), 31 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:59,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 30.0) internal successors, (960), 32 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:59,905 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 30.0) internal successors, (960), 32 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:59,905 INFO L175 Difference]: Start difference. First operand has 281 places, 308 transitions, 4434 flow. Second operand 31 states and 226 transitions. [2023-11-17 12:11:59,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 389 transitions, 6968 flow [2023-11-17 12:11:59,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 389 transitions, 6375 flow, removed 247 selfloop flow, removed 19 redundant places. [2023-11-17 12:11:59,998 INFO L231 Difference]: Finished difference. Result has 300 places, 344 transitions, 5688 flow [2023-11-17 12:11:59,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5688, PETRI_PLACES=300, PETRI_TRANSITIONS=344} [2023-11-17 12:11:59,999 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 279 predicate places. [2023-11-17 12:11:59,999 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 344 transitions, 5688 flow [2023-11-17 12:11:59,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:59,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:59,999 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:00,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:00,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-17 12:12:00,200 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:00,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2049134324, now seen corresponding path program 38 times [2023-11-17 12:12:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:00,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754588736] [2023-11-17 12:12:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:00,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754588736] [2023-11-17 12:12:00,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754588736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583887526] [2023-11-17 12:12:00,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:12:00,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:00,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:00,749 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:00,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 12:12:00,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:12:00,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:00,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:12:00,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:01,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:01,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-17 12:12:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:01,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:01,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:01,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 111 [2023-11-17 12:12:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:02,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583887526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:02,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:02,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-11-17 12:12:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091808638] [2023-11-17 12:12:02,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:02,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:12:02,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:12:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:12:02,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:02,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 344 transitions, 5688 flow. Second operand has 42 states, 42 states have (on average 4.380952380952381) internal successors, (184), 42 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:02,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:02,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:02,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:03,968 INFO L124 PetriNetUnfolderBase]: 1213/2101 cut-off events. [2023-11-17 12:12:03,968 INFO L125 PetriNetUnfolderBase]: For 84447/84447 co-relation queries the response was YES. [2023-11-17 12:12:03,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21077 conditions, 2101 events. 1213/2101 cut-off events. For 84447/84447 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11338 event pairs, 189 based on Foata normal form. 2/2103 useless extension candidates. Maximal degree in co-relation 20964. Up to 1624 conditions per place. [2023-11-17 12:12:03,991 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 345 selfloop transitions, 193 changer transitions 10/548 dead transitions. [2023-11-17 12:12:03,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 548 transitions, 10795 flow [2023-11-17 12:12:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 12:12:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 12:12:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 354 transitions. [2023-11-17 12:12:03,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24081632653061225 [2023-11-17 12:12:03,992 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 354 transitions. [2023-11-17 12:12:03,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 354 transitions. [2023-11-17 12:12:03,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:03,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 354 transitions. [2023-11-17 12:12:03,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 7.224489795918367) internal successors, (354), 49 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:03,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 30.0) internal successors, (1500), 50 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:03,994 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 30.0) internal successors, (1500), 50 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:03,994 INFO L175 Difference]: Start difference. First operand has 300 places, 344 transitions, 5688 flow. Second operand 49 states and 354 transitions. [2023-11-17 12:12:03,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 548 transitions, 10795 flow [2023-11-17 12:12:04,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 548 transitions, 8460 flow, removed 1082 selfloop flow, removed 23 redundant places. [2023-11-17 12:12:04,149 INFO L231 Difference]: Finished difference. Result has 330 places, 455 transitions, 7382 flow [2023-11-17 12:12:04,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=4558, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7382, PETRI_PLACES=330, PETRI_TRANSITIONS=455} [2023-11-17 12:12:04,150 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 309 predicate places. [2023-11-17 12:12:04,150 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 455 transitions, 7382 flow [2023-11-17 12:12:04,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.380952380952381) internal successors, (184), 42 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:04,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:04,150 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:04,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:04,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-17 12:12:04,356 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:04,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1304431826, now seen corresponding path program 39 times [2023-11-17 12:12:04,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:04,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843274767] [2023-11-17 12:12:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:04,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:04,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843274767] [2023-11-17 12:12:04,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843274767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338144242] [2023-11-17 12:12:04,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:12:04,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:04,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:04,890 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:04,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 12:12:05,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:12:05,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:05,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 12:12:05,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:05,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:05,257 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 17 treesize of output 14 [2023-11-17 12:12:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:12:05,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:05,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:05,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-17 12:12:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:12:05,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338144242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:05,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:05,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 38 [2023-11-17 12:12:05,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153435076] [2023-11-17 12:12:05,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:05,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:12:05,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:05,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:12:05,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 12:12:05,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:05,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 455 transitions, 7382 flow. Second operand has 40 states, 40 states have (on average 4.5) internal successors, (180), 40 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:05,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:05,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:05,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:08,166 INFO L124 PetriNetUnfolderBase]: 1295/2282 cut-off events. [2023-11-17 12:12:08,166 INFO L125 PetriNetUnfolderBase]: For 91153/91153 co-relation queries the response was YES. [2023-11-17 12:12:08,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21846 conditions, 2282 events. 1295/2282 cut-off events. For 91153/91153 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12917 event pairs, 164 based on Foata normal form. 1/2277 useless extension candidates. Maximal degree in co-relation 21730. Up to 1591 conditions per place. [2023-11-17 12:12:08,190 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 297 selfloop transitions, 279 changer transitions 7/583 dead transitions. [2023-11-17 12:12:08,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 583 transitions, 10650 flow [2023-11-17 12:12:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 12:12:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 12:12:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 335 transitions. [2023-11-17 12:12:08,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22789115646258504 [2023-11-17 12:12:08,191 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 335 transitions. [2023-11-17 12:12:08,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 335 transitions. [2023-11-17 12:12:08,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:08,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 335 transitions. [2023-11-17 12:12:08,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 6.836734693877551) internal successors, (335), 49 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:08,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 30.0) internal successors, (1500), 50 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:08,193 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 30.0) internal successors, (1500), 50 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:08,193 INFO L175 Difference]: Start difference. First operand has 330 places, 455 transitions, 7382 flow. Second operand 49 states and 335 transitions. [2023-11-17 12:12:08,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 583 transitions, 10650 flow [2023-11-17 12:12:08,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 583 transitions, 9553 flow, removed 474 selfloop flow, removed 20 redundant places. [2023-11-17 12:12:08,393 INFO L231 Difference]: Finished difference. Result has 367 places, 511 transitions, 8838 flow [2023-11-17 12:12:08,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6651, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=8838, PETRI_PLACES=367, PETRI_TRANSITIONS=511} [2023-11-17 12:12:08,393 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 346 predicate places. [2023-11-17 12:12:08,393 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 511 transitions, 8838 flow [2023-11-17 12:12:08,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.5) internal successors, (180), 40 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:08,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:08,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:08,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-17 12:12:08,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:08,600 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:08,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1865742004, now seen corresponding path program 40 times [2023-11-17 12:12:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863903797] [2023-11-17 12:12:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:08,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863903797] [2023-11-17 12:12:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863903797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591738484] [2023-11-17 12:12:08,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:12:08,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:08,939 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:08,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 12:12:09,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:12:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:09,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:12:09,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:09,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:12:09,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:09,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 12:12:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:09,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:09,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:09,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 115 [2023-11-17 12:12:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:10,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591738484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:10,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:10,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2023-11-17 12:12:10,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292821490] [2023-11-17 12:12:10,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:10,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 12:12:10,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 12:12:10,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 12:12:10,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:10,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 511 transitions, 8838 flow. Second operand has 41 states, 41 states have (on average 4.585365853658536) internal successors, (188), 41 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:10,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:10,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:10,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:11,554 INFO L124 PetriNetUnfolderBase]: 1358/2384 cut-off events. [2023-11-17 12:12:11,554 INFO L125 PetriNetUnfolderBase]: For 101515/101515 co-relation queries the response was YES. [2023-11-17 12:12:11,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23967 conditions, 2384 events. 1358/2384 cut-off events. For 101515/101515 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13590 event pairs, 221 based on Foata normal form. 2/2380 useless extension candidates. Maximal degree in co-relation 23844. Up to 2138 conditions per place. [2023-11-17 12:12:11,581 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 500 selfloop transitions, 94 changer transitions 5/599 dead transitions. [2023-11-17 12:12:11,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 599 transitions, 11531 flow [2023-11-17 12:12:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:12:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:12:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 241 transitions. [2023-11-17 12:12:11,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2677777777777778 [2023-11-17 12:12:11,582 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 241 transitions. [2023-11-17 12:12:11,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 241 transitions. [2023-11-17 12:12:11,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:11,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 241 transitions. [2023-11-17 12:12:11,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.033333333333333) internal successors, (241), 30 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:11,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 30.0) internal successors, (930), 31 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:11,584 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 30.0) internal successors, (930), 31 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:11,584 INFO L175 Difference]: Start difference. First operand has 367 places, 511 transitions, 8838 flow. Second operand 30 states and 241 transitions. [2023-11-17 12:12:11,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 599 transitions, 11531 flow [2023-11-17 12:12:11,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 599 transitions, 9778 flow, removed 752 selfloop flow, removed 35 redundant places. [2023-11-17 12:12:11,839 INFO L231 Difference]: Finished difference. Result has 364 places, 529 transitions, 8325 flow [2023-11-17 12:12:11,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=7179, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8325, PETRI_PLACES=364, PETRI_TRANSITIONS=529} [2023-11-17 12:12:11,839 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 343 predicate places. [2023-11-17 12:12:11,840 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 529 transitions, 8325 flow [2023-11-17 12:12:11,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.585365853658536) internal successors, (188), 41 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:11,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:11,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:11,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:12,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:12,040 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:12,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:12,041 INFO L85 PathProgramCache]: Analyzing trace with hash -6792106, now seen corresponding path program 41 times [2023-11-17 12:12:12,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:12,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307723992] [2023-11-17 12:12:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:12,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:12,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:12,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307723992] [2023-11-17 12:12:12,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307723992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:12,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924431770] [2023-11-17 12:12:12,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:12:12,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:12,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:12,547 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:12,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 12:12:12,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-17 12:12:12,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:12,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:12:12,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:12:12,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:13,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:13,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-17 12:12:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:12:13,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924431770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:13,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:13,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-11-17 12:12:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416544151] [2023-11-17 12:12:13,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:13,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:12:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:12:13,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 12:12:13,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:13,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 529 transitions, 8325 flow. Second operand has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 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 12:12:13,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:13,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:13,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:14,748 INFO L124 PetriNetUnfolderBase]: 1487/2592 cut-off events. [2023-11-17 12:12:14,748 INFO L125 PetriNetUnfolderBase]: For 104602/104602 co-relation queries the response was YES. [2023-11-17 12:12:14,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25972 conditions, 2592 events. 1487/2592 cut-off events. For 104602/104602 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14843 event pairs, 216 based on Foata normal form. 3/2589 useless extension candidates. Maximal degree in co-relation 25851. Up to 2223 conditions per place. [2023-11-17 12:12:14,778 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 467 selfloop transitions, 172 changer transitions 4/643 dead transitions. [2023-11-17 12:12:14,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 643 transitions, 12830 flow [2023-11-17 12:12:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:12:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:12:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 263 transitions. [2023-11-17 12:12:14,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25047619047619046 [2023-11-17 12:12:14,779 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 263 transitions. [2023-11-17 12:12:14,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 263 transitions. [2023-11-17 12:12:14,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:14,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 263 transitions. [2023-11-17 12:12:14,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 7.514285714285714) internal successors, (263), 35 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:14,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:14,780 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:14,780 INFO L175 Difference]: Start difference. First operand has 364 places, 529 transitions, 8325 flow. Second operand 35 states and 263 transitions. [2023-11-17 12:12:14,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 643 transitions, 12830 flow [2023-11-17 12:12:15,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 643 transitions, 11985 flow, removed 390 selfloop flow, removed 15 redundant places. [2023-11-17 12:12:15,025 INFO L231 Difference]: Finished difference. Result has 394 places, 586 transitions, 10856 flow [2023-11-17 12:12:15,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=7742, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10856, PETRI_PLACES=394, PETRI_TRANSITIONS=586} [2023-11-17 12:12:15,025 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 373 predicate places. [2023-11-17 12:12:15,025 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 586 transitions, 10856 flow [2023-11-17 12:12:15,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 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 12:12:15,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:15,026 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:15,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-17 12:12:15,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-17 12:12:15,231 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:15,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash 828787438, now seen corresponding path program 42 times [2023-11-17 12:12:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:15,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287345293] [2023-11-17 12:12:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:15,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:15,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:15,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287345293] [2023-11-17 12:12:15,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287345293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:15,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938494485] [2023-11-17 12:12:15,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:12:15,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:15,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:15,559 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:15,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 12:12:15,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:12:15,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:15,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-17 12:12:15,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:15,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:12:15,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:15,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 12:12:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:16,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:22,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:22,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 113 [2023-11-17 12:12:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:23,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938494485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:23,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:23,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 38 [2023-11-17 12:12:23,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063589357] [2023-11-17 12:12:23,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:23,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:12:23,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:23,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:12:23,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1359, Unknown=3, NotChecked=0, Total=1560 [2023-11-17 12:12:23,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:23,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 586 transitions, 10856 flow. Second operand has 40 states, 40 states have (on average 4.625) internal successors, (185), 40 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:23,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:23,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:23,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:24,985 INFO L124 PetriNetUnfolderBase]: 1629/2830 cut-off events. [2023-11-17 12:12:24,985 INFO L125 PetriNetUnfolderBase]: For 149798/149798 co-relation queries the response was YES. [2023-11-17 12:12:25,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31393 conditions, 2830 events. 1629/2830 cut-off events. For 149798/149798 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16545 event pairs, 216 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 31260. Up to 2217 conditions per place. [2023-11-17 12:12:25,018 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 499 selfloop transitions, 195 changer transitions 6/700 dead transitions. [2023-11-17 12:12:25,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 700 transitions, 15303 flow [2023-11-17 12:12:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:12:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:12:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 247 transitions. [2023-11-17 12:12:25,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26559139784946234 [2023-11-17 12:12:25,020 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 247 transitions. [2023-11-17 12:12:25,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 247 transitions. [2023-11-17 12:12:25,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:25,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 247 transitions. [2023-11-17 12:12:25,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.967741935483871) internal successors, (247), 31 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:25,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 30.0) internal successors, (960), 32 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:25,021 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 30.0) internal successors, (960), 32 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:25,021 INFO L175 Difference]: Start difference. First operand has 394 places, 586 transitions, 10856 flow. Second operand 31 states and 247 transitions. [2023-11-17 12:12:25,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 700 transitions, 15303 flow [2023-11-17 12:12:25,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 700 transitions, 12960 flow, removed 1114 selfloop flow, removed 18 redundant places. [2023-11-17 12:12:25,357 INFO L231 Difference]: Finished difference. Result has 412 places, 630 transitions, 11410 flow [2023-11-17 12:12:25,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=8561, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11410, PETRI_PLACES=412, PETRI_TRANSITIONS=630} [2023-11-17 12:12:25,358 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2023-11-17 12:12:25,358 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 630 transitions, 11410 flow [2023-11-17 12:12:25,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.625) internal successors, (185), 40 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:25,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:25,358 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:25,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-17 12:12:25,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-17 12:12:25,559 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:25,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash 854461008, now seen corresponding path program 43 times [2023-11-17 12:12:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:25,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564239485] [2023-11-17 12:12:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:25,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:26,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564239485] [2023-11-17 12:12:26,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564239485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345946676] [2023-11-17 12:12:26,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:12:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:26,130 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:26,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 12:12:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:26,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:12:26,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:12:26,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:26,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:26,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-17 12:12:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:12:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345946676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:26,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-11-17 12:12:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133127747] [2023-11-17 12:12:26,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:26,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:12:26,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:12:26,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:12:26,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:26,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 630 transitions, 11410 flow. Second operand has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:26,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:26,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:26,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:28,717 INFO L124 PetriNetUnfolderBase]: 1747/3039 cut-off events. [2023-11-17 12:12:28,717 INFO L125 PetriNetUnfolderBase]: For 175944/175944 co-relation queries the response was YES. [2023-11-17 12:12:28,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33572 conditions, 3039 events. 1747/3039 cut-off events. For 175944/175944 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18018 event pairs, 250 based on Foata normal form. 3/3028 useless extension candidates. Maximal degree in co-relation 33432. Up to 2582 conditions per place. [2023-11-17 12:12:28,751 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 536 selfloop transitions, 187 changer transitions 5/728 dead transitions. [2023-11-17 12:12:28,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 728 transitions, 14934 flow [2023-11-17 12:12:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 12:12:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 12:12:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 294 transitions. [2023-11-17 12:12:28,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2512820512820513 [2023-11-17 12:12:28,752 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 294 transitions. [2023-11-17 12:12:28,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 294 transitions. [2023-11-17 12:12:28,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:28,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 294 transitions. [2023-11-17 12:12:28,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 7.538461538461538) internal successors, (294), 39 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 12:12:28,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 30.0) internal successors, (1200), 40 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:28,753 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 30.0) internal successors, (1200), 40 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:28,753 INFO L175 Difference]: Start difference. First operand has 412 places, 630 transitions, 11410 flow. Second operand 39 states and 294 transitions. [2023-11-17 12:12:28,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 728 transitions, 14934 flow [2023-11-17 12:12:29,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 728 transitions, 13029 flow, removed 904 selfloop flow, removed 14 redundant places. [2023-11-17 12:12:29,204 INFO L231 Difference]: Finished difference. Result has 443 places, 655 transitions, 11429 flow [2023-11-17 12:12:29,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=9549, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11429, PETRI_PLACES=443, PETRI_TRANSITIONS=655} [2023-11-17 12:12:29,205 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 422 predicate places. [2023-11-17 12:12:29,205 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 655 transitions, 11429 flow [2023-11-17 12:12:29,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:29,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:29,205 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:29,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:29,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 12:12:29,406 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:29,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1968522182, now seen corresponding path program 44 times [2023-11-17 12:12:29,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:29,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303933478] [2023-11-17 12:12:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:29,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:29,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:29,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303933478] [2023-11-17 12:12:29,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303933478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:29,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648719111] [2023-11-17 12:12:29,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:12:29,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:29,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:29,837 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:29,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 12:12:29,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:12:29,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:29,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-17 12:12:29,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:30,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:30,132 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 15 treesize of output 14 [2023-11-17 12:12:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:30,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:30,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:30,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 103 [2023-11-17 12:12:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:30,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648719111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:30,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:30,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2023-11-17 12:12:30,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515593604] [2023-11-17 12:12:30,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:30,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:12:30,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:30,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:12:30,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 12:12:30,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:30,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 655 transitions, 11429 flow. Second operand has 34 states, 34 states have (on average 4.411764705882353) internal successors, (150), 34 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 12:12:30,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:30,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:30,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:32,522 INFO L124 PetriNetUnfolderBase]: 1811/3148 cut-off events. [2023-11-17 12:12:32,522 INFO L125 PetriNetUnfolderBase]: For 164684/164684 co-relation queries the response was YES. [2023-11-17 12:12:32,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32880 conditions, 3148 events. 1811/3148 cut-off events. For 164684/164684 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18810 event pairs, 285 based on Foata normal form. 1/3143 useless extension candidates. Maximal degree in co-relation 32732. Up to 2807 conditions per place. [2023-11-17 12:12:32,557 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 560 selfloop transitions, 150 changer transitions 2/712 dead transitions. [2023-11-17 12:12:32,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 712 transitions, 14077 flow [2023-11-17 12:12:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:12:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:12:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 175 transitions. [2023-11-17 12:12:32,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24305555555555555 [2023-11-17 12:12:32,558 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 175 transitions. [2023-11-17 12:12:32,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 175 transitions. [2023-11-17 12:12:32,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:32,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 175 transitions. [2023-11-17 12:12:32,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.291666666666667) internal successors, (175), 24 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 12:12:32,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:32,560 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:32,560 INFO L175 Difference]: Start difference. First operand has 443 places, 655 transitions, 11429 flow. Second operand 24 states and 175 transitions. [2023-11-17 12:12:32,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 712 transitions, 14077 flow [2023-11-17 12:12:32,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 712 transitions, 13024 flow, removed 459 selfloop flow, removed 25 redundant places. [2023-11-17 12:12:32,977 INFO L231 Difference]: Finished difference. Result has 446 places, 676 transitions, 11603 flow [2023-11-17 12:12:32,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10376, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11603, PETRI_PLACES=446, PETRI_TRANSITIONS=676} [2023-11-17 12:12:32,978 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 425 predicate places. [2023-11-17 12:12:32,978 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 676 transitions, 11603 flow [2023-11-17 12:12:32,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.411764705882353) internal successors, (150), 34 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 12:12:32,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:32,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:32,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:33,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:33,179 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:33,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2036605930, now seen corresponding path program 45 times [2023-11-17 12:12:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:33,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435050465] [2023-11-17 12:12:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:33,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:33,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435050465] [2023-11-17 12:12:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435050465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887350017] [2023-11-17 12:12:33,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:12:33,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:33,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:33,600 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:33,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 12:12:33,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:12:33,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:33,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-17 12:12:33,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:33,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:12:33,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:12:33,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:12:34,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:12:34,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:34,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 12:12:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:34,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:34,514 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1381 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1381) c_~A~0.base))) (= (select .cse0 (+ c_~A~0.offset (* c_~N~0 4) (- 8))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset 4)))))) is different from false [2023-11-17 12:12:34,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:34,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-11-17 12:12:34,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:34,572 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 98 treesize of output 91 [2023-11-17 12:12:34,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:34,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 69 [2023-11-17 12:12:34,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:34,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2023-11-17 12:12:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:34,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887350017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:34,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:34,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-11-17 12:12:34,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987400758] [2023-11-17 12:12:34,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:34,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-17 12:12:34,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:34,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-17 12:12:34,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1750, Unknown=1, NotChecked=86, Total=2070 [2023-11-17 12:12:34,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:34,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 676 transitions, 11603 flow. Second operand has 46 states, 46 states have (on average 4.413043478260869) internal successors, (203), 46 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:34,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:34,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:34,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:37,175 INFO L124 PetriNetUnfolderBase]: 1946/3398 cut-off events. [2023-11-17 12:12:37,175 INFO L125 PetriNetUnfolderBase]: For 170555/170555 co-relation queries the response was YES. [2023-11-17 12:12:37,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34916 conditions, 3398 events. 1946/3398 cut-off events. For 170555/170555 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20859 event pairs, 271 based on Foata normal form. 2/3394 useless extension candidates. Maximal degree in co-relation 34764. Up to 2984 conditions per place. [2023-11-17 12:12:37,216 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 614 selfloop transitions, 194 changer transitions 9/817 dead transitions. [2023-11-17 12:12:37,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 817 transitions, 15712 flow [2023-11-17 12:12:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-17 12:12:37,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-17 12:12:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 353 transitions. [2023-11-17 12:12:37,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23533333333333334 [2023-11-17 12:12:37,218 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 353 transitions. [2023-11-17 12:12:37,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 353 transitions. [2023-11-17 12:12:37,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:37,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 353 transitions. [2023-11-17 12:12:37,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 7.06) internal successors, (353), 50 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:37,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 30.0) internal successors, (1530), 51 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:37,219 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 30.0) internal successors, (1530), 51 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:37,220 INFO L175 Difference]: Start difference. First operand has 446 places, 676 transitions, 11603 flow. Second operand 50 states and 353 transitions. [2023-11-17 12:12:37,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 817 transitions, 15712 flow [2023-11-17 12:12:37,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 817 transitions, 14809 flow, removed 403 selfloop flow, removed 12 redundant places. [2023-11-17 12:12:37,698 INFO L231 Difference]: Finished difference. Result has 492 places, 735 transitions, 13230 flow [2023-11-17 12:12:37,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10944, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=13230, PETRI_PLACES=492, PETRI_TRANSITIONS=735} [2023-11-17 12:12:37,699 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 471 predicate places. [2023-11-17 12:12:37,699 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 735 transitions, 13230 flow [2023-11-17 12:12:37,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.413043478260869) internal successors, (203), 46 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:37,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:37,700 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:37,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:37,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 12:12:37,900 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:37,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash 3710998, now seen corresponding path program 46 times [2023-11-17 12:12:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:37,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981436732] [2023-11-17 12:12:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:38,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:38,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981436732] [2023-11-17 12:12:38,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981436732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:38,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798172290] [2023-11-17 12:12:38,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:12:38,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:38,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:38,317 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:38,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 12:12:38,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:12:38,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:38,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:12:38,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:38,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:38,730 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 15 treesize of output 14 [2023-11-17 12:12:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:38,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:38,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:38,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 105 [2023-11-17 12:12:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:39,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798172290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:39,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:39,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 12:12:39,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079421196] [2023-11-17 12:12:39,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:39,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:12:39,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:12:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:12:39,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:39,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 735 transitions, 13230 flow. Second operand has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:39,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:39,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:39,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:41,365 INFO L124 PetriNetUnfolderBase]: 1977/3459 cut-off events. [2023-11-17 12:12:41,365 INFO L125 PetriNetUnfolderBase]: For 180953/180953 co-relation queries the response was YES. [2023-11-17 12:12:41,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36108 conditions, 3459 events. 1977/3459 cut-off events. For 180953/180953 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21308 event pairs, 265 based on Foata normal form. 2/3455 useless extension candidates. Maximal degree in co-relation 35946. Up to 3149 conditions per place. [2023-11-17 12:12:41,411 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 646 selfloop transitions, 172 changer transitions 6/824 dead transitions. [2023-11-17 12:12:41,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 824 transitions, 16106 flow [2023-11-17 12:12:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-17 12:12:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-17 12:12:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 296 transitions. [2023-11-17 12:12:41,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22945736434108527 [2023-11-17 12:12:41,412 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 296 transitions. [2023-11-17 12:12:41,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 296 transitions. [2023-11-17 12:12:41,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:41,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 296 transitions. [2023-11-17 12:12:41,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 6.883720930232558) internal successors, (296), 43 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:41,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 30.0) internal successors, (1320), 44 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:41,414 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 30.0) internal successors, (1320), 44 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:41,414 INFO L175 Difference]: Start difference. First operand has 492 places, 735 transitions, 13230 flow. Second operand 43 states and 296 transitions. [2023-11-17 12:12:41,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 824 transitions, 16106 flow [2023-11-17 12:12:41,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 824 transitions, 15047 flow, removed 470 selfloop flow, removed 29 redundant places. [2023-11-17 12:12:41,987 INFO L231 Difference]: Finished difference. Result has 509 places, 760 transitions, 13440 flow [2023-11-17 12:12:41,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=12191, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=13440, PETRI_PLACES=509, PETRI_TRANSITIONS=760} [2023-11-17 12:12:41,988 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 488 predicate places. [2023-11-17 12:12:41,988 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 760 transitions, 13440 flow [2023-11-17 12:12:41,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:41,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:41,988 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:41,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:42,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:42,189 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:42,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:42,189 INFO L85 PathProgramCache]: Analyzing trace with hash 726435962, now seen corresponding path program 47 times [2023-11-17 12:12:42,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:42,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473995242] [2023-11-17 12:12:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:42,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:42,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473995242] [2023-11-17 12:12:42,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473995242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:42,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295829980] [2023-11-17 12:12:42,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:12:42,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:42,720 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:42,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 12:12:42,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:12:42,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:42,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:12:42,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:12:43,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:43,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:43,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-17 12:12:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:12:43,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295829980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:43,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:43,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-11-17 12:12:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134528872] [2023-11-17 12:12:43,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:43,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:12:43,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:12:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:12:43,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:43,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 760 transitions, 13440 flow. Second operand has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:43,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:43,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:43,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:45,332 INFO L124 PetriNetUnfolderBase]: 2114/3672 cut-off events. [2023-11-17 12:12:45,333 INFO L125 PetriNetUnfolderBase]: For 226649/226649 co-relation queries the response was YES. [2023-11-17 12:12:45,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40974 conditions, 3672 events. 2114/3672 cut-off events. For 226649/226649 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22711 event pairs, 284 based on Foata normal form. 3/3669 useless extension candidates. Maximal degree in co-relation 40808. Up to 3097 conditions per place. [2023-11-17 12:12:45,382 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 591 selfloop transitions, 280 changer transitions 7/878 dead transitions. [2023-11-17 12:12:45,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 878 transitions, 18958 flow [2023-11-17 12:12:45,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:12:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:12:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 274 transitions. [2023-11-17 12:12:45,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2537037037037037 [2023-11-17 12:12:45,383 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 274 transitions. [2023-11-17 12:12:45,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 274 transitions. [2023-11-17 12:12:45,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:12:45,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 274 transitions. [2023-11-17 12:12:45,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.611111111111111) internal successors, (274), 36 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:45,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 30.0) internal successors, (1110), 37 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:45,385 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 30.0) internal successors, (1110), 37 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:45,385 INFO L175 Difference]: Start difference. First operand has 509 places, 760 transitions, 13440 flow. Second operand 36 states and 274 transitions. [2023-11-17 12:12:45,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 878 transitions, 18958 flow [2023-11-17 12:12:46,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 878 transitions, 18298 flow, removed 285 selfloop flow, removed 26 redundant places. [2023-11-17 12:12:46,060 INFO L231 Difference]: Finished difference. Result has 529 places, 818 transitions, 16902 flow [2023-11-17 12:12:46,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=12922, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16902, PETRI_PLACES=529, PETRI_TRANSITIONS=818} [2023-11-17 12:12:46,060 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 508 predicate places. [2023-11-17 12:12:46,061 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 818 transitions, 16902 flow [2023-11-17 12:12:46,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:46,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:12:46,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:12:46,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-17 12:12:46,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-17 12:12:46,264 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:12:46,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:12:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash -745389352, now seen corresponding path program 48 times [2023-11-17 12:12:46,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:12:46,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038005005] [2023-11-17 12:12:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:12:46,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:12:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:12:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:12:46,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038005005] [2023-11-17 12:12:46,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038005005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:12:46,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117761665] [2023-11-17 12:12:46,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:12:46,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:12:46,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:12:46,701 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:12:46,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-17 12:12:46,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:12:46,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:12:46,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-17 12:12:46,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:12:46,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:12:46,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:12:46,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:12:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:47,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:12:48,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:48,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-11-17 12:12:48,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:48,240 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 94 treesize of output 88 [2023-11-17 12:12:48,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:48,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 68 [2023-11-17 12:12:48,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:12:48,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-17 12:12:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:12:48,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117761665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:12:48,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:12:48,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 12:12:48,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152844643] [2023-11-17 12:12:48,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:12:48,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:12:48,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:12:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:12:48,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1505, Unknown=3, NotChecked=0, Total=1722 [2023-11-17 12:12:48,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:12:48,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 818 transitions, 16902 flow. Second operand has 42 states, 42 states have (on average 4.404761904761905) internal successors, (185), 42 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:12:48,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:12:48,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:12:48,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:12:52,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:12:54,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:12:56,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:12:58,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:00,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:04,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:06,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:10,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:13,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:16,784 INFO L124 PetriNetUnfolderBase]: 2437/4162 cut-off events. [2023-11-17 12:13:16,784 INFO L125 PetriNetUnfolderBase]: For 338309/338309 co-relation queries the response was YES. [2023-11-17 12:13:16,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53075 conditions, 4162 events. 2437/4162 cut-off events. For 338309/338309 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25814 event pairs, 285 based on Foata normal form. 2/4158 useless extension candidates. Maximal degree in co-relation 52898. Up to 3687 conditions per place. [2023-11-17 12:13:16,848 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 798 selfloop transitions, 242 changer transitions 8/1048 dead transitions. [2023-11-17 12:13:16,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 1048 transitions, 26833 flow [2023-11-17 12:13:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-17 12:13:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-17 12:13:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 430 transitions. [2023-11-17 12:13:16,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23497267759562843 [2023-11-17 12:13:16,850 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 430 transitions. [2023-11-17 12:13:16,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 430 transitions. [2023-11-17 12:13:16,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:13:16,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 430 transitions. [2023-11-17 12:13:16,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 7.049180327868853) internal successors, (430), 61 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:16,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 30.0) internal successors, (1860), 62 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:16,852 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 30.0) internal successors, (1860), 62 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:16,852 INFO L175 Difference]: Start difference. First operand has 529 places, 818 transitions, 16902 flow. Second operand 61 states and 430 transitions. [2023-11-17 12:13:16,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 1048 transitions, 26833 flow [2023-11-17 12:13:17,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1048 transitions, 23823 flow, removed 1415 selfloop flow, removed 19 redundant places. [2023-11-17 12:13:17,972 INFO L231 Difference]: Finished difference. Result has 580 places, 970 transitions, 21959 flow [2023-11-17 12:13:17,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=13944, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=21959, PETRI_PLACES=580, PETRI_TRANSITIONS=970} [2023-11-17 12:13:17,973 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 559 predicate places. [2023-11-17 12:13:17,973 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 970 transitions, 21959 flow [2023-11-17 12:13:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.404761904761905) internal successors, (185), 42 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:17,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:13:17,973 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:13:17,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-17 12:13:18,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-17 12:13:18,178 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:13:18,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:13:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash -348689314, now seen corresponding path program 49 times [2023-11-17 12:13:18,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:13:18,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147169380] [2023-11-17 12:13:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:13:18,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:13:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:13:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:13:18,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147169380] [2023-11-17 12:13:18,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147169380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:13:18,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610315052] [2023-11-17 12:13:18,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:13:18,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:13:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:13:18,688 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:13:18,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-17 12:13:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:13:18,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:13:18,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:13:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:13:19,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:13:19,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:13:19,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-11-17 12:13:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:13:19,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610315052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:13:19,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:13:19,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-11-17 12:13:19,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252536277] [2023-11-17 12:13:19,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:13:19,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:13:19,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:13:19,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:13:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:13:19,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:13:19,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 970 transitions, 21959 flow. Second operand has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:19,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:13:19,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:13:19,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:13:21,953 INFO L124 PetriNetUnfolderBase]: 2548/4347 cut-off events. [2023-11-17 12:13:21,953 INFO L125 PetriNetUnfolderBase]: For 341544/341544 co-relation queries the response was YES. [2023-11-17 12:13:22,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53822 conditions, 4347 events. 2548/4347 cut-off events. For 341544/341544 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27207 event pairs, 286 based on Foata normal form. 3/4332 useless extension candidates. Maximal degree in co-relation 53635. Up to 3888 conditions per place. [2023-11-17 12:13:22,019 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 884 selfloop transitions, 180 changer transitions 5/1069 dead transitions. [2023-11-17 12:13:22,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1069 transitions, 26851 flow [2023-11-17 12:13:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:13:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:13:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 239 transitions. [2023-11-17 12:13:22,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24895833333333334 [2023-11-17 12:13:22,020 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 239 transitions. [2023-11-17 12:13:22,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 239 transitions. [2023-11-17 12:13:22,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:13:22,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 239 transitions. [2023-11-17 12:13:22,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 7.46875) internal successors, (239), 32 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:22,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 30.0) internal successors, (990), 33 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:22,021 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 30.0) internal successors, (990), 33 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:22,021 INFO L175 Difference]: Start difference. First operand has 580 places, 970 transitions, 21959 flow. Second operand 32 states and 239 transitions. [2023-11-17 12:13:22,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1069 transitions, 26851 flow [2023-11-17 12:13:23,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 1069 transitions, 20880 flow, removed 2940 selfloop flow, removed 23 redundant places. [2023-11-17 12:13:23,235 INFO L231 Difference]: Finished difference. Result has 599 places, 1010 transitions, 18457 flow [2023-11-17 12:13:23,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=16012, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=18457, PETRI_PLACES=599, PETRI_TRANSITIONS=1010} [2023-11-17 12:13:23,236 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 578 predicate places. [2023-11-17 12:13:23,236 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 1010 transitions, 18457 flow [2023-11-17 12:13:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:23,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:13:23,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:13:23,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-11-17 12:13:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:13:23,441 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:13:23,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:13:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1591063228, now seen corresponding path program 50 times [2023-11-17 12:13:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:13:23,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537730095] [2023-11-17 12:13:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:13:23,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:13:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:13:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:23,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:13:23,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537730095] [2023-11-17 12:13:23,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537730095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:13:23,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039873073] [2023-11-17 12:13:23,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:13:23,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:13:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:13:23,901 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:13:23,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-17 12:13:24,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:13:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:13:24,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-17 12:13:24,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:13:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:24,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:13:24,584 INFO L349 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-11-17 12:13:24,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 95 [2023-11-17 12:13:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039873073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:13:24,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:13:24,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2023-11-17 12:13:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074549873] [2023-11-17 12:13:24,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:13:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:13:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:13:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:13:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 12:13:24,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:13:24,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1010 transitions, 18457 flow. Second operand has 40 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:24,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:13:24,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:13:24,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:13:28,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:30,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:32,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:34,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:36,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:13:40,046 INFO L124 PetriNetUnfolderBase]: 3062/5135 cut-off events. [2023-11-17 12:13:40,046 INFO L125 PetriNetUnfolderBase]: For 416912/416912 co-relation queries the response was YES. [2023-11-17 12:13:40,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64723 conditions, 5135 events. 3062/5135 cut-off events. For 416912/416912 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 32560 event pairs, 259 based on Foata normal form. 2/5109 useless extension candidates. Maximal degree in co-relation 64526. Up to 4275 conditions per place. [2023-11-17 12:13:40,124 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 955 selfloop transitions, 315 changer transitions 31/1301 dead transitions. [2023-11-17 12:13:40,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 1301 transitions, 30269 flow [2023-11-17 12:13:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-17 12:13:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-17 12:13:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 417 transitions. [2023-11-17 12:13:40,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2622641509433962 [2023-11-17 12:13:40,126 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 417 transitions. [2023-11-17 12:13:40,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 417 transitions. [2023-11-17 12:13:40,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:13:40,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 417 transitions. [2023-11-17 12:13:40,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 7.867924528301887) internal successors, (417), 53 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:40,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 30.0) internal successors, (1620), 54 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:40,128 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 30.0) internal successors, (1620), 54 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:40,128 INFO L175 Difference]: Start difference. First operand has 599 places, 1010 transitions, 18457 flow. Second operand 53 states and 417 transitions. [2023-11-17 12:13:40,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 1301 transitions, 30269 flow [2023-11-17 12:13:41,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1301 transitions, 28402 flow, removed 883 selfloop flow, removed 16 redundant places. [2023-11-17 12:13:41,588 INFO L231 Difference]: Finished difference. Result has 650 places, 1183 transitions, 25624 flow [2023-11-17 12:13:41,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=17162, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=25624, PETRI_PLACES=650, PETRI_TRANSITIONS=1183} [2023-11-17 12:13:41,589 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 629 predicate places. [2023-11-17 12:13:41,589 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 1183 transitions, 25624 flow [2023-11-17 12:13:41,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:41,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:13:41,590 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:13:41,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-17 12:13:41,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-17 12:13:41,795 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:13:41,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:13:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1613040762, now seen corresponding path program 51 times [2023-11-17 12:13:41,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:13:41,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501889664] [2023-11-17 12:13:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:13:41,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:13:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:13:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:42,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:13:42,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501889664] [2023-11-17 12:13:42,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501889664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:13:42,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010452359] [2023-11-17 12:13:42,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:13:42,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:13:42,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:13:42,289 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:13:42,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-17 12:13:42,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-17 12:13:42,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:13:42,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-17 12:13:42,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:13:42,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:13:42,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:13:42,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:13:42,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:13:42,823 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 19 treesize of output 16 [2023-11-17 12:13:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:13:42,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:13:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:13:43,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010452359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:13:43,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:13:43,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2023-11-17 12:13:43,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129731869] [2023-11-17 12:13:43,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:13:43,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 12:13:43,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:13:43,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 12:13:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2023-11-17 12:13:43,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:13:43,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 1183 transitions, 25624 flow. Second operand has 39 states, 39 states have (on average 4.538461538461538) internal successors, (177), 39 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:43,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:13:43,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:13:43,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:13:46,774 INFO L124 PetriNetUnfolderBase]: 3068/5176 cut-off events. [2023-11-17 12:13:46,774 INFO L125 PetriNetUnfolderBase]: For 411907/411907 co-relation queries the response was YES. [2023-11-17 12:13:46,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64782 conditions, 5176 events. 3068/5176 cut-off events. For 411907/411907 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 33026 event pairs, 264 based on Foata normal form. 2/5154 useless extension candidates. Maximal degree in co-relation 64569. Up to 4802 conditions per place. [2023-11-17 12:13:46,857 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1107 selfloop transitions, 160 changer transitions 9/1276 dead transitions. [2023-11-17 12:13:46,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 1276 transitions, 30712 flow [2023-11-17 12:13:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:13:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:13:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 253 transitions. [2023-11-17 12:13:46,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24095238095238095 [2023-11-17 12:13:46,858 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 253 transitions. [2023-11-17 12:13:46,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 253 transitions. [2023-11-17 12:13:46,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:13:46,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 253 transitions. [2023-11-17 12:13:46,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 7.228571428571429) internal successors, (253), 35 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:46,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:46,859 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:46,859 INFO L175 Difference]: Start difference. First operand has 650 places, 1183 transitions, 25624 flow. Second operand 35 states and 253 transitions. [2023-11-17 12:13:46,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 1276 transitions, 30712 flow [2023-11-17 12:13:48,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 1276 transitions, 24809 flow, removed 2920 selfloop flow, removed 18 redundant places. [2023-11-17 12:13:48,818 INFO L231 Difference]: Finished difference. Result has 672 places, 1208 transitions, 21947 flow [2023-11-17 12:13:48,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20297, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=21947, PETRI_PLACES=672, PETRI_TRANSITIONS=1208} [2023-11-17 12:13:48,819 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 651 predicate places. [2023-11-17 12:13:48,819 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1208 transitions, 21947 flow [2023-11-17 12:13:48,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.538461538461538) internal successors, (177), 39 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:48,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:13:48,819 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:13:48,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-17 12:13:49,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-17 12:13:49,019 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:13:49,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:13:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1820673420, now seen corresponding path program 52 times [2023-11-17 12:13:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:13:49,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883854446] [2023-11-17 12:13:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:13:49,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:13:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:13:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:49,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:13:49,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883854446] [2023-11-17 12:13:49,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883854446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:13:49,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173602754] [2023-11-17 12:13:49,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:13:49,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:13:49,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:13:49,370 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:13:49,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-17 12:13:49,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:13:49,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:13:49,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:13:49,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:13:49,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:13:49,764 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 15 treesize of output 14 [2023-11-17 12:13:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:49,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:13:49,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:13:49,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 117 [2023-11-17 12:13:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:50,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173602754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:13:50,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:13:50,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2023-11-17 12:13:50,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688725266] [2023-11-17 12:13:50,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:13:50,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 12:13:50,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:13:50,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 12:13:50,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 12:13:50,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:13:50,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1208 transitions, 21947 flow. Second operand has 41 states, 41 states have (on average 4.439024390243903) internal successors, (182), 41 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:50,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:13:50,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:13:50,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:13:53,466 INFO L124 PetriNetUnfolderBase]: 3104/5226 cut-off events. [2023-11-17 12:13:53,466 INFO L125 PetriNetUnfolderBase]: For 333998/333998 co-relation queries the response was YES. [2023-11-17 12:13:53,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56246 conditions, 5226 events. 3104/5226 cut-off events. For 333998/333998 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33484 event pairs, 313 based on Foata normal form. 2/5202 useless extension candidates. Maximal degree in co-relation 56025. Up to 5041 conditions per place. [2023-11-17 12:13:53,549 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 1188 selfloop transitions, 79 changer transitions 6/1273 dead transitions. [2023-11-17 12:13:53,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 1273 transitions, 25447 flow [2023-11-17 12:13:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:13:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:13:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 210 transitions. [2023-11-17 12:13:53,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25 [2023-11-17 12:13:53,550 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 210 transitions. [2023-11-17 12:13:53,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 210 transitions. [2023-11-17 12:13:53,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:13:53,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 210 transitions. [2023-11-17 12:13:53,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 7.5) internal successors, (210), 28 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 12:13:53,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:53,551 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:53,551 INFO L175 Difference]: Start difference. First operand has 672 places, 1208 transitions, 21947 flow. Second operand 28 states and 210 transitions. [2023-11-17 12:13:53,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 1273 transitions, 25447 flow [2023-11-17 12:13:55,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 1273 transitions, 24199 flow, removed 538 selfloop flow, removed 27 redundant places. [2023-11-17 12:13:55,032 INFO L231 Difference]: Finished difference. Result has 675 places, 1219 transitions, 21377 flow [2023-11-17 12:13:55,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=20767, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=21377, PETRI_PLACES=675, PETRI_TRANSITIONS=1219} [2023-11-17 12:13:55,033 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 654 predicate places. [2023-11-17 12:13:55,033 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 1219 transitions, 21377 flow [2023-11-17 12:13:55,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.439024390243903) internal successors, (182), 41 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:55,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:13:55,033 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:13:55,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-17 12:13:55,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:13:55,235 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:13:55,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:13:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash -965366766, now seen corresponding path program 53 times [2023-11-17 12:13:55,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:13:55,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889405647] [2023-11-17 12:13:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:13:55,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:13:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:13:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:13:55,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:13:55,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889405647] [2023-11-17 12:13:55,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889405647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:13:55,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194895234] [2023-11-17 12:13:55,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:13:55,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:13:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:13:55,632 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:13:55,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-17 12:13:55,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:13:55,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:13:55,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:13:55,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:13:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:13:55,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:13:56,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:13:56,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-11-17 12:13:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:13:56,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194895234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:13:56,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:13:56,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 28 [2023-11-17 12:13:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264063103] [2023-11-17 12:13:56,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:13:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 12:13:56,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:13:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 12:13:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2023-11-17 12:13:56,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:13:56,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1219 transitions, 21377 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:56,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:13:56,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:13:56,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:13:58,972 INFO L124 PetriNetUnfolderBase]: 3232/5420 cut-off events. [2023-11-17 12:13:58,972 INFO L125 PetriNetUnfolderBase]: For 361731/361731 co-relation queries the response was YES. [2023-11-17 12:13:59,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59174 conditions, 5420 events. 3232/5420 cut-off events. For 361731/361731 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34567 event pairs, 317 based on Foata normal form. 2/5396 useless extension candidates. Maximal degree in co-relation 58950. Up to 5079 conditions per place. [2023-11-17 12:13:59,058 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1153 selfloop transitions, 167 changer transitions 5/1325 dead transitions. [2023-11-17 12:13:59,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 1325 transitions, 27487 flow [2023-11-17 12:13:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:13:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:13:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 177 transitions. [2023-11-17 12:13:59,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24583333333333332 [2023-11-17 12:13:59,059 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 177 transitions. [2023-11-17 12:13:59,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 177 transitions. [2023-11-17 12:13:59,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:13:59,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 177 transitions. [2023-11-17 12:13:59,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.375) internal successors, (177), 24 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:59,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:59,060 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:13:59,060 INFO L175 Difference]: Start difference. First operand has 675 places, 1219 transitions, 21377 flow. Second operand 24 states and 177 transitions. [2023-11-17 12:13:59,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 1325 transitions, 27487 flow [2023-11-17 12:14:00,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1325 transitions, 27401 flow, removed 18 selfloop flow, removed 17 redundant places. [2023-11-17 12:14:00,346 INFO L231 Difference]: Finished difference. Result has 690 places, 1280 transitions, 24841 flow [2023-11-17 12:14:00,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=21299, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=24841, PETRI_PLACES=690, PETRI_TRANSITIONS=1280} [2023-11-17 12:14:00,346 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 669 predicate places. [2023-11-17 12:14:00,346 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 1280 transitions, 24841 flow [2023-11-17 12:14:00,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:00,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:00,347 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:00,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:00,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:00,547 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:00,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:00,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1587847868, now seen corresponding path program 54 times [2023-11-17 12:14:00,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:00,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358464121] [2023-11-17 12:14:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:00,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:01,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:01,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358464121] [2023-11-17 12:14:01,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358464121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:01,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84949886] [2023-11-17 12:14:01,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:14:01,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:01,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:01,051 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:01,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-17 12:14:01,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:14:01,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:01,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-17 12:14:01,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:01,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:14:01,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:14:01,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:14:01,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:01,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-11-17 12:14:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:01,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:02,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:02,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-11-17 12:14:02,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:02,281 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 206 treesize of output 184 [2023-11-17 12:14:02,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:02,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 28 [2023-11-17 12:14:02,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:02,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2023-11-17 12:14:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84949886] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:02,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:02,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-11-17 12:14:02,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020795172] [2023-11-17 12:14:02,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:02,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 12:14:02,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 12:14:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1893, Unknown=5, NotChecked=0, Total=2162 [2023-11-17 12:14:02,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:14:02,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1280 transitions, 24841 flow. Second operand has 47 states, 47 states have (on average 4.297872340425532) internal successors, (202), 47 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:02,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:02,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:14:02,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:07,102 INFO L124 PetriNetUnfolderBase]: 3386/5690 cut-off events. [2023-11-17 12:14:07,102 INFO L125 PetriNetUnfolderBase]: For 436021/436021 co-relation queries the response was YES. [2023-11-17 12:14:07,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65678 conditions, 5690 events. 3386/5690 cut-off events. For 436021/436021 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36854 event pairs, 290 based on Foata normal form. 2/5666 useless extension candidates. Maximal degree in co-relation 65444. Up to 5198 conditions per place. [2023-11-17 12:14:07,205 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1197 selfloop transitions, 230 changer transitions 7/1434 dead transitions. [2023-11-17 12:14:07,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 1434 transitions, 31137 flow [2023-11-17 12:14:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-17 12:14:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-17 12:14:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 346 transitions. [2023-11-17 12:14:07,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23066666666666666 [2023-11-17 12:14:07,209 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 346 transitions. [2023-11-17 12:14:07,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 346 transitions. [2023-11-17 12:14:07,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:07,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 346 transitions. [2023-11-17 12:14:07,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 6.92) internal successors, (346), 50 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:07,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 30.0) internal successors, (1530), 51 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:07,211 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 30.0) internal successors, (1530), 51 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:07,211 INFO L175 Difference]: Start difference. First operand has 690 places, 1280 transitions, 24841 flow. Second operand 50 states and 346 transitions. [2023-11-17 12:14:07,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 1434 transitions, 31137 flow [2023-11-17 12:14:08,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 1434 transitions, 28784 flow, removed 1136 selfloop flow, removed 14 redundant places. [2023-11-17 12:14:09,018 INFO L231 Difference]: Finished difference. Result has 737 places, 1355 transitions, 25928 flow [2023-11-17 12:14:09,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=22498, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1087, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=25928, PETRI_PLACES=737, PETRI_TRANSITIONS=1355} [2023-11-17 12:14:09,019 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 716 predicate places. [2023-11-17 12:14:09,019 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 1355 transitions, 25928 flow [2023-11-17 12:14:09,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.297872340425532) internal successors, (202), 47 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:09,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:09,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:09,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:09,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:09,224 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:09,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:09,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1938636986, now seen corresponding path program 55 times [2023-11-17 12:14:09,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:09,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134415577] [2023-11-17 12:14:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:09,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:09,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:09,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134415577] [2023-11-17 12:14:09,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134415577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:09,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127603820] [2023-11-17 12:14:09,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:14:09,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:09,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:09,703 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:09,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-17 12:14:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:09,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:14:09,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:14:09,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:10,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:10,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-11-17 12:14:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:14:10,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127603820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:10,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:10,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 26 [2023-11-17 12:14:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12007609] [2023-11-17 12:14:10,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:10,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:14:10,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:10,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:14:10,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:14:10,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:14:10,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 1355 transitions, 25928 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:10,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:10,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:14:10,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:13,317 INFO L124 PetriNetUnfolderBase]: 3451/5783 cut-off events. [2023-11-17 12:14:13,317 INFO L125 PetriNetUnfolderBase]: For 437897/437897 co-relation queries the response was YES. [2023-11-17 12:14:13,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66820 conditions, 5783 events. 3451/5783 cut-off events. For 437897/437897 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 37432 event pairs, 331 based on Foata normal form. 1/5758 useless extension candidates. Maximal degree in co-relation 66575. Up to 5587 conditions per place. [2023-11-17 12:14:13,414 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1305 selfloop transitions, 107 changer transitions 1/1413 dead transitions. [2023-11-17 12:14:13,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 1413 transitions, 31017 flow [2023-11-17 12:14:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:14:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:14:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 148 transitions. [2023-11-17 12:14:13,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23492063492063492 [2023-11-17 12:14:13,415 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 148 transitions. [2023-11-17 12:14:13,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 148 transitions. [2023-11-17 12:14:13,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:13,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 148 transitions. [2023-11-17 12:14:13,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:13,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:13,416 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 30.0) internal successors, (660), 22 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:13,416 INFO L175 Difference]: Start difference. First operand has 737 places, 1355 transitions, 25928 flow. Second operand 21 states and 148 transitions. [2023-11-17 12:14:13,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 1413 transitions, 31017 flow [2023-11-17 12:14:15,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 1413 transitions, 29457 flow, removed 734 selfloop flow, removed 26 redundant places. [2023-11-17 12:14:15,679 INFO L231 Difference]: Finished difference. Result has 734 places, 1390 transitions, 26879 flow [2023-11-17 12:14:15,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=24368, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=26879, PETRI_PLACES=734, PETRI_TRANSITIONS=1390} [2023-11-17 12:14:15,680 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 713 predicate places. [2023-11-17 12:14:15,680 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 1390 transitions, 26879 flow [2023-11-17 12:14:15,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:15,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:15,680 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:15,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:15,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-17 12:14:15,881 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:15,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:15,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1623102242, now seen corresponding path program 56 times [2023-11-17 12:14:15,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:15,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916343978] [2023-11-17 12:14:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:15,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:16,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:16,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916343978] [2023-11-17 12:14:16,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916343978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:16,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868790941] [2023-11-17 12:14:16,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:14:16,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:16,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:16,289 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:16,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-17 12:14:16,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:14:16,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:16,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:14:16,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:16,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:16,697 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 15 treesize of output 14 [2023-11-17 12:14:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:16,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:16,910 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:16,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 117 [2023-11-17 12:14:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868790941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:17,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:17,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 12:14:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672259102] [2023-11-17 12:14:17,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:17,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:14:17,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:14:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:14:17,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:14:17,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 1390 transitions, 26879 flow. Second operand has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:17,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:17,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:14:17,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:21,193 INFO L124 PetriNetUnfolderBase]: 3570/5990 cut-off events. [2023-11-17 12:14:21,193 INFO L125 PetriNetUnfolderBase]: For 486272/486272 co-relation queries the response was YES. [2023-11-17 12:14:21,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70244 conditions, 5990 events. 3570/5990 cut-off events. For 486272/486272 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 39105 event pairs, 303 based on Foata normal form. 2/5968 useless extension candidates. Maximal degree in co-relation 69996. Up to 5514 conditions per place. [2023-11-17 12:14:21,306 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 1262 selfloop transitions, 230 changer transitions 7/1499 dead transitions. [2023-11-17 12:14:21,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 1499 transitions, 32591 flow [2023-11-17 12:14:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:14:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:14:21,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 260 transitions. [2023-11-17 12:14:21,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24761904761904763 [2023-11-17 12:14:21,307 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 260 transitions. [2023-11-17 12:14:21,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 260 transitions. [2023-11-17 12:14:21,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:21,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 260 transitions. [2023-11-17 12:14:21,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 7.428571428571429) internal successors, (260), 35 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:21,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:21,309 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:21,309 INFO L175 Difference]: Start difference. First operand has 734 places, 1390 transitions, 26879 flow. Second operand 35 states and 260 transitions. [2023-11-17 12:14:21,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 1499 transitions, 32591 flow [2023-11-17 12:14:23,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 1499 transitions, 30896 flow, removed 808 selfloop flow, removed 12 redundant places. [2023-11-17 12:14:23,514 INFO L231 Difference]: Finished difference. Result has 764 places, 1433 transitions, 27953 flow [2023-11-17 12:14:23,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=25184, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=27953, PETRI_PLACES=764, PETRI_TRANSITIONS=1433} [2023-11-17 12:14:23,515 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 743 predicate places. [2023-11-17 12:14:23,515 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 1433 transitions, 27953 flow [2023-11-17 12:14:23,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:23,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:23,515 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:23,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-17 12:14:23,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-11-17 12:14:23,719 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:23,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash -23093090, now seen corresponding path program 57 times [2023-11-17 12:14:23,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:23,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139066524] [2023-11-17 12:14:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:23,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:24,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:24,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139066524] [2023-11-17 12:14:24,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139066524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:24,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5055526] [2023-11-17 12:14:24,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:14:24,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:24,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:24,295 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:24,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-17 12:14:24,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:14:24,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:24,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-17 12:14:24,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:24,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:14:24,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:14:24,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:14:24,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:24,752 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 17 treesize of output 14 [2023-11-17 12:14:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:24,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:14:25,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5055526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:25,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:25,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 38 [2023-11-17 12:14:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872424298] [2023-11-17 12:14:25,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:25,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:14:25,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:14:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 12:14:25,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:14:25,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 1433 transitions, 27953 flow. Second operand has 40 states, 40 states have (on average 4.5) internal successors, (180), 40 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:25,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:25,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:14:25,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:30,017 INFO L124 PetriNetUnfolderBase]: 3678/6177 cut-off events. [2023-11-17 12:14:30,018 INFO L125 PetriNetUnfolderBase]: For 568071/568071 co-relation queries the response was YES. [2023-11-17 12:14:30,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74964 conditions, 6177 events. 3678/6177 cut-off events. For 568071/568071 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 40647 event pairs, 312 based on Foata normal form. 1/6154 useless extension candidates. Maximal degree in co-relation 74707. Up to 5499 conditions per place. [2023-11-17 12:14:30,132 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1252 selfloop transitions, 303 changer transitions 6/1561 dead transitions. [2023-11-17 12:14:30,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 1561 transitions, 35477 flow [2023-11-17 12:14:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 12:14:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 12:14:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 306 transitions. [2023-11-17 12:14:30,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2318181818181818 [2023-11-17 12:14:30,133 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 306 transitions. [2023-11-17 12:14:30,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 306 transitions. [2023-11-17 12:14:30,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:30,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 306 transitions. [2023-11-17 12:14:30,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 6.954545454545454) internal successors, (306), 44 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 30.0) internal successors, (1350), 45 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,135 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 30.0) internal successors, (1350), 45 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,135 INFO L175 Difference]: Start difference. First operand has 764 places, 1433 transitions, 27953 flow. Second operand 44 states and 306 transitions. [2023-11-17 12:14:30,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 1561 transitions, 35477 flow [2023-11-17 12:14:32,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1561 transitions, 34272 flow, removed 563 selfloop flow, removed 23 redundant places. [2023-11-17 12:14:32,723 INFO L231 Difference]: Finished difference. Result has 797 places, 1488 transitions, 30930 flow [2023-11-17 12:14:32,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=26914, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=30930, PETRI_PLACES=797, PETRI_TRANSITIONS=1488} [2023-11-17 12:14:32,724 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 776 predicate places. [2023-11-17 12:14:32,724 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 1488 transitions, 30930 flow [2023-11-17 12:14:32,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.5) internal successors, (180), 40 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:32,724 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:32,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:32,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-17 12:14:32,924 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:32,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:32,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1916659452, now seen corresponding path program 58 times [2023-11-17 12:14:32,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:32,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383727376] [2023-11-17 12:14:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:32,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:33,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383727376] [2023-11-17 12:14:33,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383727376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520143319] [2023-11-17 12:14:33,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:14:33,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:33,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:33,333 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:33,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-17 12:14:33,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:14:33,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:33,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:14:33,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:33,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:33,738 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 15 treesize of output 14 [2023-11-17 12:14:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:33,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:33,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:33,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 117 [2023-11-17 12:14:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:34,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520143319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:34,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:34,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 12:14:34,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204970042] [2023-11-17 12:14:34,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:14:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:14:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:14:34,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:14:34,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 1488 transitions, 30930 flow. Second operand has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:34,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:14:34,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:38,599 INFO L124 PetriNetUnfolderBase]: 3729/6281 cut-off events. [2023-11-17 12:14:38,599 INFO L125 PetriNetUnfolderBase]: For 684691/684691 co-relation queries the response was YES. [2023-11-17 12:14:38,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80194 conditions, 6281 events. 3729/6281 cut-off events. For 684691/684691 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 41624 event pairs, 343 based on Foata normal form. 2/6259 useless extension candidates. Maximal degree in co-relation 79924. Up to 5821 conditions per place. [2023-11-17 12:14:38,732 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 1340 selfloop transitions, 227 changer transitions 7/1574 dead transitions. [2023-11-17 12:14:38,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 831 places, 1574 transitions, 36169 flow [2023-11-17 12:14:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:14:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:14:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 267 transitions. [2023-11-17 12:14:38,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2542857142857143 [2023-11-17 12:14:38,733 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 267 transitions. [2023-11-17 12:14:38,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 267 transitions. [2023-11-17 12:14:38,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:38,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 267 transitions. [2023-11-17 12:14:38,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 7.628571428571429) internal successors, (267), 35 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:38,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:38,735 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:38,735 INFO L175 Difference]: Start difference. First operand has 797 places, 1488 transitions, 30930 flow. Second operand 35 states and 267 transitions. [2023-11-17 12:14:38,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 831 places, 1574 transitions, 36169 flow [2023-11-17 12:14:41,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 1574 transitions, 33488 flow, removed 1269 selfloop flow, removed 24 redundant places. [2023-11-17 12:14:41,941 INFO L231 Difference]: Finished difference. Result has 813 places, 1507 transitions, 30249 flow [2023-11-17 12:14:41,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=28305, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=30249, PETRI_PLACES=813, PETRI_TRANSITIONS=1507} [2023-11-17 12:14:41,942 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 792 predicate places. [2023-11-17 12:14:41,942 INFO L495 AbstractCegarLoop]: Abstraction has has 813 places, 1507 transitions, 30249 flow [2023-11-17 12:14:41,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:41,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:41,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:41,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-17 12:14:42,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:42,148 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:42,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:42,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1949140090, now seen corresponding path program 59 times [2023-11-17 12:14:42,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:42,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606165208] [2023-11-17 12:14:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:42,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606165208] [2023-11-17 12:14:42,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606165208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52377439] [2023-11-17 12:14:42,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:14:42,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:42,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:42,612 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:42,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-17 12:14:42,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:14:42,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:42,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:14:42,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:14:42,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:43,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:43,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-11-17 12:14:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:14:43,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52377439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:43,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:43,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-11-17 12:14:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901685421] [2023-11-17 12:14:43,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:14:43,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:14:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:14:43,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:14:43,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 813 places, 1507 transitions, 30249 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 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 12:14:43,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:43,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:14:43,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:47,072 INFO L124 PetriNetUnfolderBase]: 3845/6484 cut-off events. [2023-11-17 12:14:47,072 INFO L125 PetriNetUnfolderBase]: For 733262/733262 co-relation queries the response was YES. [2023-11-17 12:14:47,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83260 conditions, 6484 events. 3845/6484 cut-off events. For 733262/733262 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43254 event pairs, 365 based on Foata normal form. 4/6464 useless extension candidates. Maximal degree in co-relation 82984. Up to 6122 conditions per place. [2023-11-17 12:14:47,211 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1408 selfloop transitions, 190 changer transitions 5/1603 dead transitions. [2023-11-17 12:14:47,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 1603 transitions, 36856 flow [2023-11-17 12:14:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:14:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:14:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 220 transitions. [2023-11-17 12:14:47,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24444444444444444 [2023-11-17 12:14:47,212 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 220 transitions. [2023-11-17 12:14:47,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 220 transitions. [2023-11-17 12:14:47,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:47,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 220 transitions. [2023-11-17 12:14:47,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.333333333333333) internal successors, (220), 30 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 30.0) internal successors, (930), 31 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,213 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 30.0) internal successors, (930), 31 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,213 INFO L175 Difference]: Start difference. First operand has 813 places, 1507 transitions, 30249 flow. Second operand 30 states and 220 transitions. [2023-11-17 12:14:47,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 842 places, 1603 transitions, 36856 flow [2023-11-17 12:14:51,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 1603 transitions, 35719 flow, removed 534 selfloop flow, removed 21 redundant places. [2023-11-17 12:14:51,113 INFO L231 Difference]: Finished difference. Result has 829 places, 1555 transitions, 32527 flow [2023-11-17 12:14:51,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=29112, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=32527, PETRI_PLACES=829, PETRI_TRANSITIONS=1555} [2023-11-17 12:14:51,114 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 808 predicate places. [2023-11-17 12:14:51,114 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 1555 transitions, 32527 flow [2023-11-17 12:14:51,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 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 12:14:51,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:51,114 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:51,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-17 12:14:51,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:51,319 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:51,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:51,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1495077196, now seen corresponding path program 60 times [2023-11-17 12:14:51,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:51,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168009778] [2023-11-17 12:14:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:51,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:51,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:51,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168009778] [2023-11-17 12:14:51,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168009778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:51,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046567187] [2023-11-17 12:14:51,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:14:51,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:51,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:51,742 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:51,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-17 12:14:51,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:14:51,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:51,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-17 12:14:51,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:52,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:52,418 INFO L349 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-11-17 12:14:52,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 95 [2023-11-17 12:14:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046567187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:52,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:52,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2023-11-17 12:14:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643401060] [2023-11-17 12:14:52,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:52,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 12:14:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 12:14:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 12:14:52,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:14:52,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 1555 transitions, 32527 flow. Second operand has 40 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:52,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:52,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:14:52,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:58,827 INFO L124 PetriNetUnfolderBase]: 4278/7146 cut-off events. [2023-11-17 12:14:58,827 INFO L125 PetriNetUnfolderBase]: For 966853/966853 co-relation queries the response was YES. [2023-11-17 12:14:58,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98614 conditions, 7146 events. 4278/7146 cut-off events. For 966853/966853 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 47876 event pairs, 383 based on Foata normal form. 2/7120 useless extension candidates. Maximal degree in co-relation 98329. Up to 6117 conditions per place. [2023-11-17 12:14:58,980 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1405 selfloop transitions, 412 changer transitions 25/1842 dead transitions. [2023-11-17 12:14:58,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 886 places, 1842 transitions, 46054 flow [2023-11-17 12:14:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-17 12:14:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-17 12:14:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 427 transitions. [2023-11-17 12:14:58,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2454022988505747 [2023-11-17 12:14:58,982 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 427 transitions. [2023-11-17 12:14:58,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 427 transitions. [2023-11-17 12:14:58,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:58,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 427 transitions. [2023-11-17 12:14:58,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 7.362068965517241) internal successors, (427), 58 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:58,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 30.0) internal successors, (1770), 59 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:58,984 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 30.0) internal successors, (1770), 59 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:58,984 INFO L175 Difference]: Start difference. First operand has 829 places, 1555 transitions, 32527 flow. Second operand 58 states and 427 transitions. [2023-11-17 12:14:58,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 886 places, 1842 transitions, 46054 flow [2023-11-17 12:15:04,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 1842 transitions, 42945 flow, removed 1503 selfloop flow, removed 16 redundant places. [2023-11-17 12:15:04,064 INFO L231 Difference]: Finished difference. Result has 886 places, 1711 transitions, 39620 flow [2023-11-17 12:15:04,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=29874, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=39620, PETRI_PLACES=886, PETRI_TRANSITIONS=1711} [2023-11-17 12:15:04,065 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 865 predicate places. [2023-11-17 12:15:04,065 INFO L495 AbstractCegarLoop]: Abstraction has has 886 places, 1711 transitions, 39620 flow [2023-11-17 12:15:04,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:04,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:04,065 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:04,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:04,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-17 12:15:04,266 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:04,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:04,266 INFO L85 PathProgramCache]: Analyzing trace with hash -297067274, now seen corresponding path program 61 times [2023-11-17 12:15:04,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:04,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334929807] [2023-11-17 12:15:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:04,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:04,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:04,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334929807] [2023-11-17 12:15:04,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334929807] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:04,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978420447] [2023-11-17 12:15:04,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:15:04,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:04,805 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:04,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-17 12:15:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:04,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-17 12:15:04,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:04,957 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 12:15:05,082 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 27 treesize of output 18 [2023-11-17 12:15:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:15:05,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:05,237 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1911 (Array Int Int))) (= c_~counter~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1911) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset 8)) (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset))))) is different from false [2023-11-17 12:15:05,289 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1911 (Array Int Int))) (= (let ((.cse0 (select |c_#memory_int| c_~A~0.base)) (.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1 4)))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1911) c_~A~0.base))) (+ (select .cse2 (+ c_~A~0.offset 8)) (select .cse2 (+ c_~A~0.offset 4)) (select .cse2 c_~A~0.offset))))) is different from false [2023-11-17 12:15:05,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:05,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 118 [2023-11-17 12:15:05,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:05,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2023-11-17 12:15:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2023-11-17 12:15:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978420447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:05,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:05,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2023-11-17 12:15:05,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710274559] [2023-11-17 12:15:05,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:15:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:15:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=886, Unknown=7, NotChecked=122, Total=1122 [2023-11-17 12:15:05,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:15:05,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 1711 transitions, 39620 flow. Second operand has 34 states, 34 states have (on average 4.617647058823529) internal successors, (157), 34 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:05,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:05,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:15:05,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:10,751 INFO L124 PetriNetUnfolderBase]: 4279/7171 cut-off events. [2023-11-17 12:15:10,751 INFO L125 PetriNetUnfolderBase]: For 948968/948968 co-relation queries the response was YES. [2023-11-17 12:15:10,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98371 conditions, 7171 events. 4279/7171 cut-off events. For 948968/948968 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 48257 event pairs, 321 based on Foata normal form. 1/7144 useless extension candidates. Maximal degree in co-relation 98069. Up to 6630 conditions per place. [2023-11-17 12:15:10,976 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 1548 selfloop transitions, 213 changer transitions 1/1762 dead transitions. [2023-11-17 12:15:10,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 907 places, 1762 transitions, 44802 flow [2023-11-17 12:15:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:15:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:15:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 167 transitions. [2023-11-17 12:15:10,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25303030303030305 [2023-11-17 12:15:10,977 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 167 transitions. [2023-11-17 12:15:10,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 167 transitions. [2023-11-17 12:15:10,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:10,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 167 transitions. [2023-11-17 12:15:10,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:10,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 30.0) internal successors, (690), 23 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:10,978 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 30.0) internal successors, (690), 23 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:10,978 INFO L175 Difference]: Start difference. First operand has 886 places, 1711 transitions, 39620 flow. Second operand 22 states and 167 transitions. [2023-11-17 12:15:10,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 907 places, 1762 transitions, 44802 flow [2023-11-17 12:15:16,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 875 places, 1762 transitions, 38613 flow, removed 3023 selfloop flow, removed 32 redundant places. [2023-11-17 12:15:16,557 INFO L231 Difference]: Finished difference. Result has 879 places, 1722 transitions, 34871 flow [2023-11-17 12:15:16,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=33511, PETRI_DIFFERENCE_MINUEND_PLACES=854, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=34871, PETRI_PLACES=879, PETRI_TRANSITIONS=1722} [2023-11-17 12:15:16,558 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 858 predicate places. [2023-11-17 12:15:16,558 INFO L495 AbstractCegarLoop]: Abstraction has has 879 places, 1722 transitions, 34871 flow [2023-11-17 12:15:16,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.617647058823529) internal successors, (157), 34 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:16,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:16,559 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:16,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-17 12:15:16,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-17 12:15:16,759 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:16,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:16,759 INFO L85 PathProgramCache]: Analyzing trace with hash -186027972, now seen corresponding path program 62 times [2023-11-17 12:15:16,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:16,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928224193] [2023-11-17 12:15:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:16,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:17,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928224193] [2023-11-17 12:15:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928224193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657137945] [2023-11-17 12:15:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:17,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:17,265 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:17,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-17 12:15:17,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:17,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 12:15:17,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:15:17,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-17 12:15:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:15:17,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:17,785 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1944 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1944) c_~A~0.base))) (= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 (+ c_~A~0.offset 8)))))) is different from false [2023-11-17 12:15:17,791 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1944 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1944) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 (+ c_~A~0.offset 8))) (let ((.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1 4))))))) is different from false [2023-11-17 12:15:17,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:17,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-11-17 12:15:17,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:17,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-11-17 12:15:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-11-17 12:15:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657137945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:18,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:18,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 34 [2023-11-17 12:15:18,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652533763] [2023-11-17 12:15:18,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:18,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 12:15:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 12:15:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1015, Unknown=2, NotChecked=130, Total=1260 [2023-11-17 12:15:18,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:15:18,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 879 places, 1722 transitions, 34871 flow. Second operand has 36 states, 36 states have (on average 4.583333333333333) internal successors, (165), 36 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:18,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:18,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:15:18,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:22,967 INFO L124 PetriNetUnfolderBase]: 4311/7228 cut-off events. [2023-11-17 12:15:22,968 INFO L125 PetriNetUnfolderBase]: For 765042/765042 co-relation queries the response was YES. [2023-11-17 12:15:23,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90917 conditions, 7228 events. 4311/7228 cut-off events. For 765042/765042 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 48824 event pairs, 354 based on Foata normal form. 1/7199 useless extension candidates. Maximal degree in co-relation 90611. Up to 6638 conditions per place. [2023-11-17 12:15:23,123 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 1545 selfloop transitions, 220 changer transitions 1/1766 dead transitions. [2023-11-17 12:15:23,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 900 places, 1766 transitions, 39736 flow [2023-11-17 12:15:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:15:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:15:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 161 transitions. [2023-11-17 12:15:23,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24393939393939393 [2023-11-17 12:15:23,124 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 161 transitions. [2023-11-17 12:15:23,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 161 transitions. [2023-11-17 12:15:23,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:23,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 161 transitions. [2023-11-17 12:15:23,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:23,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 30.0) internal successors, (690), 23 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:23,125 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 30.0) internal successors, (690), 23 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:23,125 INFO L175 Difference]: Start difference. First operand has 879 places, 1722 transitions, 34871 flow. Second operand 22 states and 161 transitions. [2023-11-17 12:15:23,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 900 places, 1766 transitions, 39736 flow [2023-11-17 12:15:27,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 885 places, 1766 transitions, 38837 flow, removed 325 selfloop flow, removed 15 redundant places. [2023-11-17 12:15:27,327 INFO L231 Difference]: Finished difference. Result has 889 places, 1729 transitions, 35250 flow [2023-11-17 12:15:27,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=34026, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=35250, PETRI_PLACES=889, PETRI_TRANSITIONS=1729} [2023-11-17 12:15:27,328 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 868 predicate places. [2023-11-17 12:15:27,328 INFO L495 AbstractCegarLoop]: Abstraction has has 889 places, 1729 transitions, 35250 flow [2023-11-17 12:15:27,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.583333333333333) internal successors, (165), 36 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:27,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:27,328 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:27,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-17 12:15:27,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:27,532 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:27,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash 451269584, now seen corresponding path program 63 times [2023-11-17 12:15:27,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:27,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605526022] [2023-11-17 12:15:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:27,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:27,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605526022] [2023-11-17 12:15:27,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605526022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467152583] [2023-11-17 12:15:27,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:27,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:27,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:27,848 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:27,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-17 12:15:27,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:15:27,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:27,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-17 12:15:27,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:28,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:15:28,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:28,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 12:15:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:28,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:28,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:28,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 57 [2023-11-17 12:15:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467152583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:28,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2023-11-17 12:15:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628239081] [2023-11-17 12:15:28,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:28,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 12:15:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 12:15:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 12:15:28,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:15:28,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 889 places, 1729 transitions, 35250 flow. Second operand has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:28,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:28,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:15:28,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:34,844 INFO L124 PetriNetUnfolderBase]: 4470/7509 cut-off events. [2023-11-17 12:15:34,845 INFO L125 PetriNetUnfolderBase]: For 850607/850607 co-relation queries the response was YES. [2023-11-17 12:15:34,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98209 conditions, 7509 events. 4470/7509 cut-off events. For 850607/850607 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 51089 event pairs, 463 based on Foata normal form. 3/7482 useless extension candidates. Maximal degree in co-relation 97898. Up to 7140 conditions per place. [2023-11-17 12:15:35,003 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 1726 selfloop transitions, 146 changer transitions 10/1882 dead transitions. [2023-11-17 12:15:35,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 936 places, 1882 transitions, 43877 flow [2023-11-17 12:15:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-17 12:15:35,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-17 12:15:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 353 transitions. [2023-11-17 12:15:35,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24513888888888888 [2023-11-17 12:15:35,004 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 353 transitions. [2023-11-17 12:15:35,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 353 transitions. [2023-11-17 12:15:35,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:35,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 353 transitions. [2023-11-17 12:15:35,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 7.354166666666667) internal successors, (353), 48 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 30.0) internal successors, (1470), 49 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,006 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 30.0) internal successors, (1470), 49 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,006 INFO L175 Difference]: Start difference. First operand has 889 places, 1729 transitions, 35250 flow. Second operand 48 states and 353 transitions. [2023-11-17 12:15:35,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 936 places, 1882 transitions, 43877 flow [2023-11-17 12:15:39,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 919 places, 1882 transitions, 43300 flow, removed 158 selfloop flow, removed 17 redundant places. [2023-11-17 12:15:39,681 INFO L231 Difference]: Finished difference. Result has 931 places, 1792 transitions, 38934 flow [2023-11-17 12:15:39,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=34685, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=38934, PETRI_PLACES=931, PETRI_TRANSITIONS=1792} [2023-11-17 12:15:39,682 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 910 predicate places. [2023-11-17 12:15:39,682 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 1792 transitions, 38934 flow [2023-11-17 12:15:39,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.511627906976744) internal successors, (194), 43 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:39,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:39,683 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:39,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:39,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-17 12:15:39,888 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:39,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:39,888 INFO L85 PathProgramCache]: Analyzing trace with hash -819526586, now seen corresponding path program 64 times [2023-11-17 12:15:39,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:39,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069041122] [2023-11-17 12:15:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:39,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:40,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069041122] [2023-11-17 12:15:40,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069041122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135386826] [2023-11-17 12:15:40,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:40,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:40,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:40,411 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:40,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-17 12:15:40,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:40,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:40,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-17 12:15:40,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:15:40,568 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 10 treesize of output 8 [2023-11-17 12:15:40,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 12:15:40,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:15:40,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:15:40,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:15:40,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:40,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 12:15:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:40,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:41,251 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2013 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2013) c_~A~0.base))) (= (let ((.cse1 (* c_~N~0 4))) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset .cse1 (- 8))) (select .cse0 (+ c_~A~0.offset .cse1 (- 4))))) (let ((.cse2 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse2)) (select .cse0 (+ c_~A~0.offset .cse2 4)) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse2 8))))))) is different from false [2023-11-17 12:15:41,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:41,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 94 [2023-11-17 12:15:41,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:41,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 750 treesize of output 646 [2023-11-17 12:15:41,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:41,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 162 [2023-11-17 12:15:41,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:41,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 83 [2023-11-17 12:15:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-17 12:15:41,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135386826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:41,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:41,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-11-17 12:15:41,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449395646] [2023-11-17 12:15:41,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:41,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 12:15:41,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 12:15:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1703, Unknown=13, NotChecked=84, Total=1980 [2023-11-17 12:15:41,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:15:41,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 1792 transitions, 38934 flow. Second operand has 45 states, 45 states have (on average 4.444444444444445) internal successors, (200), 45 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:41,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:41,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:15:41,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:48,139 INFO L124 PetriNetUnfolderBase]: 4572/7693 cut-off events. [2023-11-17 12:15:48,139 INFO L125 PetriNetUnfolderBase]: For 944457/944457 co-relation queries the response was YES. [2023-11-17 12:15:48,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102970 conditions, 7693 events. 4572/7693 cut-off events. For 944457/944457 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 52737 event pairs, 382 based on Foata normal form. 2/7665 useless extension candidates. Maximal degree in co-relation 102647. Up to 7159 conditions per place. [2023-11-17 12:15:48,305 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 1665 selfloop transitions, 238 changer transitions 4/1907 dead transitions. [2023-11-17 12:15:48,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 973 places, 1907 transitions, 45696 flow [2023-11-17 12:15:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 12:15:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 12:15:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 310 transitions. [2023-11-17 12:15:48,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23484848484848486 [2023-11-17 12:15:48,306 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 310 transitions. [2023-11-17 12:15:48,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 310 transitions. [2023-11-17 12:15:48,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:48,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 310 transitions. [2023-11-17 12:15:48,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 7.045454545454546) internal successors, (310), 44 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:48,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 30.0) internal successors, (1350), 45 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:48,308 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 30.0) internal successors, (1350), 45 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:48,308 INFO L175 Difference]: Start difference. First operand has 931 places, 1792 transitions, 38934 flow. Second operand 44 states and 310 transitions. [2023-11-17 12:15:48,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 973 places, 1907 transitions, 45696 flow [2023-11-17 12:15:53,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 953 places, 1907 transitions, 43460 flow, removed 1075 selfloop flow, removed 20 redundant places. [2023-11-17 12:15:53,503 INFO L231 Difference]: Finished difference. Result has 960 places, 1831 transitions, 39320 flow [2023-11-17 12:15:53,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=36698, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=39320, PETRI_PLACES=960, PETRI_TRANSITIONS=1831} [2023-11-17 12:15:53,505 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 939 predicate places. [2023-11-17 12:15:53,505 INFO L495 AbstractCegarLoop]: Abstraction has has 960 places, 1831 transitions, 39320 flow [2023-11-17 12:15:53,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.444444444444445) internal successors, (200), 45 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:53,505 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:53,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-17 12:15:53,706 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:53,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash -922306764, now seen corresponding path program 65 times [2023-11-17 12:15:53,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:53,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899942324] [2023-11-17 12:15:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:53,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:54,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:54,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899942324] [2023-11-17 12:15:54,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899942324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:54,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299017101] [2023-11-17 12:15:54,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:54,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:54,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:54,196 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:54,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-17 12:15:54,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:15:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:54,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-17 12:15:54,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:54,356 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 42 treesize of output 38 [2023-11-17 12:15:54,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:15:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:54,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:54,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:54,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-11-17 12:15:54,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:15:54,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-11-17 12:15:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:15:55,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299017101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:55,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:55,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-11-17 12:15:55,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254606984] [2023-11-17 12:15:55,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:55,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 12:15:55,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:55,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 12:15:55,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1312, Unknown=5, NotChecked=0, Total=1482 [2023-11-17 12:15:55,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:15:55,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 960 places, 1831 transitions, 39320 flow. Second operand has 39 states, 39 states have (on average 4.435897435897436) internal successors, (173), 39 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:55,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:55,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:15:55,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:01,094 INFO L124 PetriNetUnfolderBase]: 4629/7789 cut-off events. [2023-11-17 12:16:01,095 INFO L125 PetriNetUnfolderBase]: For 956437/956437 co-relation queries the response was YES. [2023-11-17 12:16:01,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103732 conditions, 7789 events. 4629/7789 cut-off events. For 956437/956437 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 53520 event pairs, 467 based on Foata normal form. 1/7760 useless extension candidates. Maximal degree in co-relation 103402. Up to 7200 conditions per place. [2023-11-17 12:16:01,273 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1617 selfloop transitions, 274 changer transitions 1/1892 dead transitions. [2023-11-17 12:16:01,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 988 places, 1892 transitions, 45319 flow [2023-11-17 12:16:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:16:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:16:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 202 transitions. [2023-11-17 12:16:01,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23218390804597702 [2023-11-17 12:16:01,274 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 202 transitions. [2023-11-17 12:16:01,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 202 transitions. [2023-11-17 12:16:01,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:01,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 202 transitions. [2023-11-17 12:16:01,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 6.9655172413793105) internal successors, (202), 29 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 30.0) internal successors, (900), 30 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,276 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 30.0) internal successors, (900), 30 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,276 INFO L175 Difference]: Start difference. First operand has 960 places, 1831 transitions, 39320 flow. Second operand 29 states and 202 transitions. [2023-11-17 12:16:01,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 988 places, 1892 transitions, 45319 flow [2023-11-17 12:16:06,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 963 places, 1892 transitions, 44118 flow, removed 536 selfloop flow, removed 25 redundant places. [2023-11-17 12:16:06,966 INFO L231 Difference]: Finished difference. Result has 967 places, 1851 transitions, 40128 flow [2023-11-17 12:16:06,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=38119, PETRI_DIFFERENCE_MINUEND_PLACES=935, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=40128, PETRI_PLACES=967, PETRI_TRANSITIONS=1851} [2023-11-17 12:16:06,968 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 946 predicate places. [2023-11-17 12:16:06,968 INFO L495 AbstractCegarLoop]: Abstraction has has 967 places, 1851 transitions, 40128 flow [2023-11-17 12:16:06,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.435897435897436) internal successors, (173), 39 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:06,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:06,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:06,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:07,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-17 12:16:07,169 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:07,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:07,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1762897418, now seen corresponding path program 66 times [2023-11-17 12:16:07,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:07,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172391185] [2023-11-17 12:16:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:07,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172391185] [2023-11-17 12:16:07,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172391185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368906298] [2023-11-17 12:16:07,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:16:07,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:07,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:07,703 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:07,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-17 12:16:07,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:16:07,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:07,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 12:16:07,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:08,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:16:08,003 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 22 treesize of output 15 [2023-11-17 12:16:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:16:08,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:08,274 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2081 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2081) c_~A~0.base))) (= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 (+ c_~A~0.offset 8)) (select .cse0 c_~A~0.offset))))) is different from false [2023-11-17 12:16:08,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:08,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-11-17 12:16:08,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:08,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-11-17 12:16:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:16:08,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368906298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:08,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:08,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-11-17 12:16:08,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090006175] [2023-11-17 12:16:08,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:08,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 12:16:08,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 12:16:08,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1145, Unknown=5, NotChecked=68, Total=1332 [2023-11-17 12:16:08,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:16:08,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 967 places, 1851 transitions, 40128 flow. Second operand has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:08,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:08,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:16:08,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:14,718 INFO L124 PetriNetUnfolderBase]: 4719/7951 cut-off events. [2023-11-17 12:16:14,718 INFO L125 PetriNetUnfolderBase]: For 1030153/1030153 co-relation queries the response was YES. [2023-11-17 12:16:14,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107918 conditions, 7951 events. 4719/7951 cut-off events. For 1030153/1030153 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 55024 event pairs, 402 based on Foata normal form. 2/7923 useless extension candidates. Maximal degree in co-relation 107584. Up to 7125 conditions per place. [2023-11-17 12:16:14,924 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1594 selfloop transitions, 328 changer transitions 5/1927 dead transitions. [2023-11-17 12:16:14,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 994 places, 1927 transitions, 46765 flow [2023-11-17 12:16:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:16:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:16:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 205 transitions. [2023-11-17 12:16:14,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24404761904761904 [2023-11-17 12:16:14,925 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 205 transitions. [2023-11-17 12:16:14,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 205 transitions. [2023-11-17 12:16:14,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:14,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 205 transitions. [2023-11-17 12:16:14,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 7.321428571428571) internal successors, (205), 28 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,927 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,927 INFO L175 Difference]: Start difference. First operand has 967 places, 1851 transitions, 40128 flow. Second operand 28 states and 205 transitions. [2023-11-17 12:16:14,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 994 places, 1927 transitions, 46765 flow [2023-11-17 12:16:20,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 1927 transitions, 45563 flow, removed 514 selfloop flow, removed 20 redundant places. [2023-11-17 12:16:20,662 INFO L231 Difference]: Finished difference. Result has 980 places, 1877 transitions, 41747 flow [2023-11-17 12:16:20,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=38926, PETRI_DIFFERENCE_MINUEND_PLACES=947, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=41747, PETRI_PLACES=980, PETRI_TRANSITIONS=1877} [2023-11-17 12:16:20,664 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 959 predicate places. [2023-11-17 12:16:20,664 INFO L495 AbstractCegarLoop]: Abstraction has has 980 places, 1877 transitions, 41747 flow [2023-11-17 12:16:20,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:20,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:20,664 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:20,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-11-17 12:16:20,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2023-11-17 12:16:20,865 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:20,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:20,866 INFO L85 PathProgramCache]: Analyzing trace with hash 95863038, now seen corresponding path program 67 times [2023-11-17 12:16:20,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:20,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813779908] [2023-11-17 12:16:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:20,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:21,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:21,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813779908] [2023-11-17 12:16:21,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813779908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:21,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840080410] [2023-11-17 12:16:21,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:16:21,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:21,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:21,392 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:21,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-17 12:16:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:21,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:16:21,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:16:21,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:21,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:21,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-17 12:16:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:16:22,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840080410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:22,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:22,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-11-17 12:16:22,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124136416] [2023-11-17 12:16:22,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:22,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:16:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:16:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 12:16:22,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:16:22,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 980 places, 1877 transitions, 41747 flow. Second operand has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:22,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:22,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:16:22,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:28,068 INFO L124 PetriNetUnfolderBase]: 4764/8027 cut-off events. [2023-11-17 12:16:28,069 INFO L125 PetriNetUnfolderBase]: For 1084507/1084507 co-relation queries the response was YES. [2023-11-17 12:16:28,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110718 conditions, 8027 events. 4764/8027 cut-off events. For 1084507/1084507 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 55604 event pairs, 557 based on Foata normal form. 1/7998 useless extension candidates. Maximal degree in co-relation 110379. Up to 7742 conditions per place. [2023-11-17 12:16:28,258 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 1782 selfloop transitions, 135 changer transitions 1/1918 dead transitions. [2023-11-17 12:16:28,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1003 places, 1918 transitions, 47121 flow [2023-11-17 12:16:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:16:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:16:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 161 transitions. [2023-11-17 12:16:28,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22361111111111112 [2023-11-17 12:16:28,259 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 161 transitions. [2023-11-17 12:16:28,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 161 transitions. [2023-11-17 12:16:28,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:28,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 161 transitions. [2023-11-17 12:16:28,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 6.708333333333333) internal successors, (161), 24 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:28,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:28,260 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:28,260 INFO L175 Difference]: Start difference. First operand has 980 places, 1877 transitions, 41747 flow. Second operand 24 states and 161 transitions. [2023-11-17 12:16:28,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1003 places, 1918 transitions, 47121 flow [2023-11-17 12:16:34,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 983 places, 1918 transitions, 45152 flow, removed 817 selfloop flow, removed 20 redundant places. [2023-11-17 12:16:34,386 INFO L231 Difference]: Finished difference. Result has 987 places, 1889 transitions, 41002 flow [2023-11-17 12:16:34,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=39778, PETRI_DIFFERENCE_MINUEND_PLACES=960, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=41002, PETRI_PLACES=987, PETRI_TRANSITIONS=1889} [2023-11-17 12:16:34,388 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 966 predicate places. [2023-11-17 12:16:34,388 INFO L495 AbstractCegarLoop]: Abstraction has has 987 places, 1889 transitions, 41002 flow [2023-11-17 12:16:34,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:34,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:34,388 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:34,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:34,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:34,588 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:34,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -34484790, now seen corresponding path program 68 times [2023-11-17 12:16:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171630585] [2023-11-17 12:16:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:34,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171630585] [2023-11-17 12:16:34,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171630585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:34,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218817573] [2023-11-17 12:16:34,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:16:34,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:34,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:34,964 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:34,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-17 12:16:35,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:16:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:35,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:16:35,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:16:35,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:35,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 12:16:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:35,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:35,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:35,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 115 [2023-11-17 12:16:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:36,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218817573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:36,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:36,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 12:16:36,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080313866] [2023-11-17 12:16:36,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:36,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:16:36,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:36,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:16:36,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:16:36,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:16:36,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 1889 transitions, 41002 flow. Second operand has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:36,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:36,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:16:36,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:43,236 INFO L124 PetriNetUnfolderBase]: 4888/8244 cut-off events. [2023-11-17 12:16:43,236 INFO L125 PetriNetUnfolderBase]: For 1096601/1096601 co-relation queries the response was YES. [2023-11-17 12:16:43,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113300 conditions, 8244 events. 4888/8244 cut-off events. For 1096601/1096601 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 57348 event pairs, 485 based on Foata normal form. 2/8216 useless extension candidates. Maximal degree in co-relation 112959. Up to 7849 conditions per place. [2023-11-17 12:16:43,433 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1818 selfloop transitions, 202 changer transitions 6/2026 dead transitions. [2023-11-17 12:16:43,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 2026 transitions, 49354 flow [2023-11-17 12:16:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-17 12:16:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-17 12:16:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 346 transitions. [2023-11-17 12:16:43,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2261437908496732 [2023-11-17 12:16:43,434 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 346 transitions. [2023-11-17 12:16:43,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 346 transitions. [2023-11-17 12:16:43,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:43,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 346 transitions. [2023-11-17 12:16:43,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 6.784313725490196) internal successors, (346), 51 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:43,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 30.0) internal successors, (1560), 52 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:43,436 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 30.0) internal successors, (1560), 52 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:43,436 INFO L175 Difference]: Start difference. First operand has 987 places, 1889 transitions, 41002 flow. Second operand 51 states and 346 transitions. [2023-11-17 12:16:43,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 2026 transitions, 49354 flow [2023-11-17 12:16:49,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1020 places, 2026 transitions, 48306 flow, removed 424 selfloop flow, removed 17 redundant places. [2023-11-17 12:16:49,991 INFO L231 Difference]: Finished difference. Result has 1028 places, 1952 transitions, 43787 flow [2023-11-17 12:16:49,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=40167, PETRI_DIFFERENCE_MINUEND_PLACES=970, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=43787, PETRI_PLACES=1028, PETRI_TRANSITIONS=1952} [2023-11-17 12:16:49,992 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1007 predicate places. [2023-11-17 12:16:49,992 INFO L495 AbstractCegarLoop]: Abstraction has has 1028 places, 1952 transitions, 43787 flow [2023-11-17 12:16:49,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:49,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:49,992 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:49,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:50,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:50,193 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1875002856, now seen corresponding path program 69 times [2023-11-17 12:16:50,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:50,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965698119] [2023-11-17 12:16:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:50,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:50,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:50,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965698119] [2023-11-17 12:16:50,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965698119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:50,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619763620] [2023-11-17 12:16:50,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:16:50,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:50,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:50,688 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:50,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-17 12:16:50,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:16:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:50,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:16:50,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:16:50,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:16:51,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:51,176 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 19 treesize of output 16 [2023-11-17 12:16:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:16:51,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:51,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:51,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-11-17 12:16:51,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:51,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-11-17 12:16:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:16:51,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619763620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:51,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:51,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 12:16:51,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292784580] [2023-11-17 12:16:51,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:51,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 12:16:51,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:51,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 12:16:51,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1639, Unknown=1, NotChecked=0, Total=1806 [2023-11-17 12:16:51,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:16:51,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1028 places, 1952 transitions, 43787 flow. Second operand has 43 states, 43 states have (on average 4.465116279069767) internal successors, (192), 43 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:51,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:51,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:16:51,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:58,885 INFO L124 PetriNetUnfolderBase]: 5017/8502 cut-off events. [2023-11-17 12:16:58,885 INFO L125 PetriNetUnfolderBase]: For 1193183/1193183 co-relation queries the response was YES. [2023-11-17 12:16:59,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119333 conditions, 8502 events. 5017/8502 cut-off events. For 1193183/1193183 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 59878 event pairs, 448 based on Foata normal form. 2/8474 useless extension candidates. Maximal degree in co-relation 118983. Up to 7675 conditions per place. [2023-11-17 12:16:59,181 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1735 selfloop transitions, 313 changer transitions 14/2062 dead transitions. [2023-11-17 12:16:59,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1062 places, 2062 transitions, 51479 flow [2023-11-17 12:16:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:16:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:16:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 256 transitions. [2023-11-17 12:16:59,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2438095238095238 [2023-11-17 12:16:59,182 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 256 transitions. [2023-11-17 12:16:59,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 256 transitions. [2023-11-17 12:16:59,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:59,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 256 transitions. [2023-11-17 12:16:59,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 7.314285714285714) internal successors, (256), 35 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:59,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:59,183 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:59,183 INFO L175 Difference]: Start difference. First operand has 1028 places, 1952 transitions, 43787 flow. Second operand 35 states and 256 transitions. [2023-11-17 12:16:59,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1062 places, 2062 transitions, 51479 flow [2023-11-17 12:17:06,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1039 places, 2062 transitions, 50361 flow, removed 511 selfloop flow, removed 23 redundant places. [2023-11-17 12:17:06,724 INFO L231 Difference]: Finished difference. Result has 1047 places, 1992 transitions, 46037 flow [2023-11-17 12:17:06,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=42671, PETRI_DIFFERENCE_MINUEND_PLACES=1005, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=46037, PETRI_PLACES=1047, PETRI_TRANSITIONS=1992} [2023-11-17 12:17:06,726 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1026 predicate places. [2023-11-17 12:17:06,726 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 1992 transitions, 46037 flow [2023-11-17 12:17:06,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.465116279069767) internal successors, (192), 43 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:06,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:06,726 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:06,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-11-17 12:17:06,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:06,932 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:17:06,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1028582072, now seen corresponding path program 70 times [2023-11-17 12:17:06,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:06,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919465438] [2023-11-17 12:17:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:07,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:07,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919465438] [2023-11-17 12:17:07,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919465438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:07,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592867117] [2023-11-17 12:17:07,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:17:07,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:07,349 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:17:07,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-17 12:17:07,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:17:07,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:07,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:17:07,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:07,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:17:07,796 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 15 treesize of output 14 [2023-11-17 12:17:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:07,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:08,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:17:08,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 111 [2023-11-17 12:17:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:08,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592867117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:08,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:08,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 12:17:08,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585152881] [2023-11-17 12:17:08,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:08,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:17:08,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:17:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:17:08,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:17:08,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 1992 transitions, 46037 flow. Second operand has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:08,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:08,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:17:08,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:17:15,318 INFO L124 PetriNetUnfolderBase]: 5051/8562 cut-off events. [2023-11-17 12:17:15,318 INFO L125 PetriNetUnfolderBase]: For 1316272/1316272 co-relation queries the response was YES. [2023-11-17 12:17:15,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123691 conditions, 8562 events. 5051/8562 cut-off events. For 1316272/1316272 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 60373 event pairs, 609 based on Foata normal form. 2/8534 useless extension candidates. Maximal degree in co-relation 123337. Up to 8354 conditions per place. [2023-11-17 12:17:15,522 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 1960 selfloop transitions, 96 changer transitions 3/2059 dead transitions. [2023-11-17 12:17:15,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1081 places, 2059 transitions, 52714 flow [2023-11-17 12:17:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:17:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:17:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 238 transitions. [2023-11-17 12:17:15,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22666666666666666 [2023-11-17 12:17:15,523 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 238 transitions. [2023-11-17 12:17:15,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 238 transitions. [2023-11-17 12:17:15,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:15,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 238 transitions. [2023-11-17 12:17:15,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 6.8) internal successors, (238), 35 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 12:17:15,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:15,524 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 30.0) internal successors, (1080), 36 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:15,524 INFO L175 Difference]: Start difference. First operand has 1047 places, 1992 transitions, 46037 flow. Second operand 35 states and 238 transitions. [2023-11-17 12:17:15,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1081 places, 2059 transitions, 52714 flow [2023-11-17 12:17:23,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1058 places, 2059 transitions, 50437 flow, removed 984 selfloop flow, removed 23 redundant places. [2023-11-17 12:17:23,886 INFO L231 Difference]: Finished difference. Result has 1063 places, 2009 transitions, 45429 flow [2023-11-17 12:17:23,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=43760, PETRI_DIFFERENCE_MINUEND_PLACES=1024, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=45429, PETRI_PLACES=1063, PETRI_TRANSITIONS=2009} [2023-11-17 12:17:23,887 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1042 predicate places. [2023-11-17 12:17:23,888 INFO L495 AbstractCegarLoop]: Abstraction has has 1063 places, 2009 transitions, 45429 flow [2023-11-17 12:17:23,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:23,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:23,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:23,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-17 12:17:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-11-17 12:17:24,092 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:17:24,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1806167442, now seen corresponding path program 71 times [2023-11-17 12:17:24,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:24,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661566678] [2023-11-17 12:17:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:24,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:24,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:24,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661566678] [2023-11-17 12:17:24,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661566678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:24,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086623916] [2023-11-17 12:17:24,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:17:24,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:24,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:24,502 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:17:24,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-17 12:17:24,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:17:24,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:24,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:17:24,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:17:24,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:25,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:17:25,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-11-17 12:17:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:17:25,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086623916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:25,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:25,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-11-17 12:17:25,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166285335] [2023-11-17 12:17:25,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:25,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:17:25,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:17:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 12:17:25,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:17:25,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1063 places, 2009 transitions, 45429 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:25,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:25,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:17:25,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:17:31,883 INFO L124 PetriNetUnfolderBase]: 5128/8683 cut-off events. [2023-11-17 12:17:31,883 INFO L125 PetriNetUnfolderBase]: For 1354157/1354157 co-relation queries the response was YES. [2023-11-17 12:17:32,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125886 conditions, 8683 events. 5128/8683 cut-off events. For 1354157/1354157 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 61340 event pairs, 631 based on Foata normal form. 2/8655 useless extension candidates. Maximal degree in co-relation 125527. Up to 8397 conditions per place. [2023-11-17 12:17:32,098 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1916 selfloop transitions, 152 changer transitions 4/2072 dead transitions. [2023-11-17 12:17:32,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 2072 transitions, 53860 flow [2023-11-17 12:17:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:17:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:17:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 169 transitions. [2023-11-17 12:17:32,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24492753623188407 [2023-11-17 12:17:32,099 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 169 transitions. [2023-11-17 12:17:32,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 169 transitions. [2023-11-17 12:17:32,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:32,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 169 transitions. [2023-11-17 12:17:32,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.3478260869565215) internal successors, (169), 23 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:32,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 30.0) internal successors, (720), 24 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:32,100 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 30.0) internal successors, (720), 24 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:32,100 INFO L175 Difference]: Start difference. First operand has 1063 places, 2009 transitions, 45429 flow. Second operand 23 states and 169 transitions. [2023-11-17 12:17:32,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 2072 transitions, 53860 flow [2023-11-17 12:17:40,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1063 places, 2072 transitions, 52848 flow, removed 445 selfloop flow, removed 22 redundant places. [2023-11-17 12:17:40,789 INFO L231 Difference]: Finished difference. Result has 1067 places, 2045 transitions, 48846 flow [2023-11-17 12:17:40,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=44417, PETRI_DIFFERENCE_MINUEND_PLACES=1041, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=48846, PETRI_PLACES=1067, PETRI_TRANSITIONS=2045} [2023-11-17 12:17:40,790 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1046 predicate places. [2023-11-17 12:17:40,790 INFO L495 AbstractCegarLoop]: Abstraction has has 1067 places, 2045 transitions, 48846 flow [2023-11-17 12:17:40,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:40,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:40,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:40,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-11-17 12:17:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:40,995 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:17:40,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1699977168, now seen corresponding path program 72 times [2023-11-17 12:17:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:40,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46625776] [2023-11-17 12:17:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:40,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:41,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:41,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46625776] [2023-11-17 12:17:41,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46625776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:41,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770472514] [2023-11-17 12:17:41,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:17:41,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:41,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:41,532 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:17:41,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-11-17 12:17:41,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:17:41,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:41,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-17 12:17:41,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:41,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:17:42,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:17:42,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-17 12:17:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:42,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:42,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:17:42,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 115 [2023-11-17 12:17:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770472514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:42,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:42,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-11-17 12:17:42,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612369558] [2023-11-17 12:17:42,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:42,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 12:17:42,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:42,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 12:17:42,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2023-11-17 12:17:42,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:17:42,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1067 places, 2045 transitions, 48846 flow. Second operand has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 43 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 12:17:42,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:42,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:17:42,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:17:50,722 INFO L124 PetriNetUnfolderBase]: 5203/8825 cut-off events. [2023-11-17 12:17:50,722 INFO L125 PetriNetUnfolderBase]: For 1438333/1438333 co-relation queries the response was YES. [2023-11-17 12:17:50,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129205 conditions, 8825 events. 5203/8825 cut-off events. For 1438333/1438333 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 62543 event pairs, 518 based on Foata normal form. 2/8797 useless extension candidates. Maximal degree in co-relation 128841. Up to 8390 conditions per place. [2023-11-17 12:17:50,943 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 1916 selfloop transitions, 214 changer transitions 7/2137 dead transitions. [2023-11-17 12:17:50,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1112 places, 2137 transitions, 55628 flow [2023-11-17 12:17:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 12:17:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 12:17:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 306 transitions. [2023-11-17 12:17:50,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2217391304347826 [2023-11-17 12:17:50,944 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 306 transitions. [2023-11-17 12:17:50,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 306 transitions. [2023-11-17 12:17:50,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:50,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 306 transitions. [2023-11-17 12:17:50,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 46 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:50,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 30.0) internal successors, (1410), 47 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:50,946 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 30.0) internal successors, (1410), 47 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:50,946 INFO L175 Difference]: Start difference. First operand has 1067 places, 2045 transitions, 48846 flow. Second operand 46 states and 306 transitions. [2023-11-17 12:17:50,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1112 places, 2137 transitions, 55628 flow [2023-11-17 12:18:00,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1099 places, 2137 transitions, 52320 flow, removed 1595 selfloop flow, removed 13 redundant places. [2023-11-17 12:18:00,338 INFO L231 Difference]: Finished difference. Result has 1105 places, 2078 transitions, 47790 flow [2023-11-17 12:18:00,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=45543, PETRI_DIFFERENCE_MINUEND_PLACES=1054, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=47790, PETRI_PLACES=1105, PETRI_TRANSITIONS=2078} [2023-11-17 12:18:00,339 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1084 predicate places. [2023-11-17 12:18:00,339 INFO L495 AbstractCegarLoop]: Abstraction has has 1105 places, 2078 transitions, 47790 flow [2023-11-17 12:18:00,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 43 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 12:18:00,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:00,340 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:00,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:00,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:00,540 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:18:00,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 530285138, now seen corresponding path program 73 times [2023-11-17 12:18:00,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:00,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666058227] [2023-11-17 12:18:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:00,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:00,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:00,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666058227] [2023-11-17 12:18:00,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666058227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:00,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619757211] [2023-11-17 12:18:00,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:18:00,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:00,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:00,910 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:00,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-11-17 12:18:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:01,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 12:18:01,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:18:01,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:01,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:01,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-11-17 12:18:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:18:01,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619757211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:01,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:01,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-11-17 12:18:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497337585] [2023-11-17 12:18:01,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:01,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:18:01,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:01,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:18:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 12:18:01,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:18:01,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1105 places, 2078 transitions, 47790 flow. Second operand has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:01,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:01,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:18:01,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:09,199 INFO L124 PetriNetUnfolderBase]: 5341/9051 cut-off events. [2023-11-17 12:18:09,199 INFO L125 PetriNetUnfolderBase]: For 1562412/1562412 co-relation queries the response was YES. [2023-11-17 12:18:09,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135607 conditions, 9051 events. 5341/9051 cut-off events. For 1562412/1562412 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 64488 event pairs, 641 based on Foata normal form. 2/9005 useless extension candidates. Maximal degree in co-relation 135237. Up to 8612 conditions per place. [2023-11-17 12:18:09,428 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 2005 selfloop transitions, 182 changer transitions 3/2190 dead transitions. [2023-11-17 12:18:09,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1137 places, 2190 transitions, 58267 flow [2023-11-17 12:18:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:18:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:18:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 242 transitions. [2023-11-17 12:18:09,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24444444444444444 [2023-11-17 12:18:09,429 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 242 transitions. [2023-11-17 12:18:09,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 242 transitions. [2023-11-17 12:18:09,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:09,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 242 transitions. [2023-11-17 12:18:09,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 7.333333333333333) internal successors, (242), 33 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 30.0) internal successors, (1020), 34 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,430 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 30.0) internal successors, (1020), 34 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:09,431 INFO L175 Difference]: Start difference. First operand has 1105 places, 2078 transitions, 47790 flow. Second operand 33 states and 242 transitions. [2023-11-17 12:18:09,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1137 places, 2190 transitions, 58267 flow [2023-11-17 12:18:18,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1108 places, 2190 transitions, 57058 flow, removed 536 selfloop flow, removed 29 redundant places. [2023-11-17 12:18:18,873 INFO L231 Difference]: Finished difference. Result has 1121 places, 2141 transitions, 52623 flow [2023-11-17 12:18:18,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=46584, PETRI_DIFFERENCE_MINUEND_PLACES=1076, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=52623, PETRI_PLACES=1121, PETRI_TRANSITIONS=2141} [2023-11-17 12:18:18,875 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1100 predicate places. [2023-11-17 12:18:18,875 INFO L495 AbstractCegarLoop]: Abstraction has has 1121 places, 2141 transitions, 52623 flow [2023-11-17 12:18:18,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:18,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:18,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:18,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:19,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-11-17 12:18:19,081 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:18:19,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash 819117338, now seen corresponding path program 74 times [2023-11-17 12:18:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:19,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569713124] [2023-11-17 12:18:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:19,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:19,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569713124] [2023-11-17 12:18:19,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569713124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905435928] [2023-11-17 12:18:19,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:18:19,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:19,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:19,542 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:19,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-11-17 12:18:19,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:18:19,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:19,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 12:18:19,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:19,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:18:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:18:19,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:20,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:20,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-11-17 12:18:20,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:20,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-11-17 12:18:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:18:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905435928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:20,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:20,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-11-17 12:18:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63030627] [2023-11-17 12:18:20,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:20,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 12:18:20,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 12:18:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1205, Unknown=5, NotChecked=0, Total=1332 [2023-11-17 12:18:20,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:18:20,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1121 places, 2141 transitions, 52623 flow. Second operand has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:20,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:20,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:18:20,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:29,118 INFO L124 PetriNetUnfolderBase]: 5445/9216 cut-off events. [2023-11-17 12:18:29,118 INFO L125 PetriNetUnfolderBase]: For 1710941/1710941 co-relation queries the response was YES. [2023-11-17 12:18:29,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141850 conditions, 9216 events. 5445/9216 cut-off events. For 1710941/1710941 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 65634 event pairs, 534 based on Foata normal form. 1/9169 useless extension candidates. Maximal degree in co-relation 141466. Up to 8592 conditions per place. [2023-11-17 12:18:29,379 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 1917 selfloop transitions, 305 changer transitions 1/2223 dead transitions. [2023-11-17 12:18:29,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1151 places, 2223 transitions, 60801 flow [2023-11-17 12:18:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:18:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:18:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 222 transitions. [2023-11-17 12:18:29,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23870967741935484 [2023-11-17 12:18:29,393 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 222 transitions. [2023-11-17 12:18:29,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 222 transitions. [2023-11-17 12:18:29,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:29,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 222 transitions. [2023-11-17 12:18:29,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.161290322580645) internal successors, (222), 31 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:29,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 30.0) internal successors, (960), 32 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:29,394 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 30.0) internal successors, (960), 32 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:29,394 INFO L175 Difference]: Start difference. First operand has 1121 places, 2141 transitions, 52623 flow. Second operand 31 states and 222 transitions. [2023-11-17 12:18:29,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1151 places, 2223 transitions, 60801 flow [2023-11-17 12:18:38,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1136 places, 2223 transitions, 56377 flow, removed 2156 selfloop flow, removed 15 redundant places. [2023-11-17 12:18:39,002 INFO L231 Difference]: Finished difference. Result has 1147 places, 2183 transitions, 52384 flow [2023-11-17 12:18:39,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48199, PETRI_DIFFERENCE_MINUEND_PLACES=1106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=52384, PETRI_PLACES=1147, PETRI_TRANSITIONS=2183} [2023-11-17 12:18:39,004 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1126 predicate places. [2023-11-17 12:18:39,004 INFO L495 AbstractCegarLoop]: Abstraction has has 1147 places, 2183 transitions, 52384 flow [2023-11-17 12:18:39,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:39,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:39,004 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:39,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:39,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-11-17 12:18:39,205 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:18:39,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:39,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1680370452, now seen corresponding path program 75 times [2023-11-17 12:18:39,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:39,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780177121] [2023-11-17 12:18:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:39,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780177121] [2023-11-17 12:18:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780177121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097330755] [2023-11-17 12:18:39,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:18:39,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:39,789 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:39,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-11-17 12:18:39,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:18:39,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:39,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-17 12:18:39,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:40,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-17 12:18:40,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:18:40,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:18:40,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 12:18:40,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:40,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 57 [2023-11-17 12:18:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:40,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:41,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:41,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 64 [2023-11-17 12:18:41,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:41,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 220 [2023-11-17 12:18:41,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:41,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 84 [2023-11-17 12:18:41,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:18:41,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-17 12:18:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:41,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097330755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:41,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:41,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-11-17 12:18:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141155697] [2023-11-17 12:18:41,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:41,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 12:18:41,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:41,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 12:18:41,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1895, Unknown=3, NotChecked=0, Total=2162 [2023-11-17 12:18:41,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:18:41,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1147 places, 2183 transitions, 52384 flow. Second operand has 47 states, 47 states have (on average 4.297872340425532) internal successors, (202), 47 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:41,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:41,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:18:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:51,035 INFO L124 PetriNetUnfolderBase]: 5581/9477 cut-off events. [2023-11-17 12:18:51,036 INFO L125 PetriNetUnfolderBase]: For 1755340/1755340 co-relation queries the response was YES. [2023-11-17 12:18:51,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144039 conditions, 9477 events. 5581/9477 cut-off events. For 1755340/1755340 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 68235 event pairs, 448 based on Foata normal form. 1/9430 useless extension candidates. Maximal degree in co-relation 143645. Up to 7960 conditions per place. [2023-11-17 12:18:51,296 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 1709 selfloop transitions, 594 changer transitions 6/2309 dead transitions. [2023-11-17 12:18:51,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1188 places, 2309 transitions, 61980 flow [2023-11-17 12:18:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 12:18:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 12:18:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 297 transitions. [2023-11-17 12:18:51,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2357142857142857 [2023-11-17 12:18:51,297 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 297 transitions. [2023-11-17 12:18:51,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 297 transitions. [2023-11-17 12:18:51,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:51,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 297 transitions. [2023-11-17 12:18:51,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 7.071428571428571) internal successors, (297), 42 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:51,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 30.0) internal successors, (1290), 43 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:51,299 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 30.0) internal successors, (1290), 43 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:51,299 INFO L175 Difference]: Start difference. First operand has 1147 places, 2183 transitions, 52384 flow. Second operand 42 states and 297 transitions. [2023-11-17 12:18:51,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1188 places, 2309 transitions, 61980 flow [2023-11-17 12:19:00,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1169 places, 2309 transitions, 59090 flow, removed 1343 selfloop flow, removed 19 redundant places. [2023-11-17 12:19:01,004 INFO L231 Difference]: Finished difference. Result has 1178 places, 2236 transitions, 55209 flow [2023-11-17 12:19:01,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=49988, PETRI_DIFFERENCE_MINUEND_PLACES=1128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=55209, PETRI_PLACES=1178, PETRI_TRANSITIONS=2236} [2023-11-17 12:19:01,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1157 predicate places. [2023-11-17 12:19:01,005 INFO L495 AbstractCegarLoop]: Abstraction has has 1178 places, 2236 transitions, 55209 flow [2023-11-17 12:19:01,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.297872340425532) internal successors, (202), 47 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:01,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:01,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:01,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-11-17 12:19:01,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:01,206 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:19:01,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:01,206 INFO L85 PathProgramCache]: Analyzing trace with hash 877858896, now seen corresponding path program 76 times [2023-11-17 12:19:01,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:01,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775397923] [2023-11-17 12:19:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:01,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:01,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:01,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775397923] [2023-11-17 12:19:01,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775397923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:01,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012655468] [2023-11-17 12:19:01,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:19:01,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:01,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:01,629 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:19:01,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-11-17 12:19:01,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:19:01,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:01,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 12:19:01,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:02,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:02,080 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 15 treesize of output 14 [2023-11-17 12:19:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:02,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:02,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:02,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 117 [2023-11-17 12:19:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012655468] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:02,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:02,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-11-17 12:19:02,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438436403] [2023-11-17 12:19:02,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:02,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:19:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:19:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2023-11-17 12:19:02,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:19:02,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1178 places, 2236 transitions, 55209 flow. Second operand has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:02,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:02,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:19:02,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:11,552 INFO L124 PetriNetUnfolderBase]: 5623/9550 cut-off events. [2023-11-17 12:19:11,552 INFO L125 PetriNetUnfolderBase]: For 1884415/1884415 co-relation queries the response was YES. [2023-11-17 12:19:11,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148707 conditions, 9550 events. 5623/9550 cut-off events. For 1884415/1884415 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 69018 event pairs, 691 based on Foata normal form. 2/9500 useless extension candidates. Maximal degree in co-relation 148305. Up to 9364 conditions per place. [2023-11-17 12:19:11,815 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 2198 selfloop transitions, 90 changer transitions 3/2291 dead transitions. [2023-11-17 12:19:11,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1208 places, 2291 transitions, 62063 flow [2023-11-17 12:19:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:19:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:19:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 216 transitions. [2023-11-17 12:19:11,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.225 [2023-11-17 12:19:11,816 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 216 transitions. [2023-11-17 12:19:11,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 216 transitions. [2023-11-17 12:19:11,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:11,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 216 transitions. [2023-11-17 12:19:11,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 6.75) internal successors, (216), 32 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 30.0) internal successors, (990), 33 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,818 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 30.0) internal successors, (990), 33 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,818 INFO L175 Difference]: Start difference. First operand has 1178 places, 2236 transitions, 55209 flow. Second operand 32 states and 216 transitions. [2023-11-17 12:19:11,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1208 places, 2291 transitions, 62063 flow [2023-11-17 12:19:25,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1182 places, 2291 transitions, 59647 flow, removed 1041 selfloop flow, removed 26 redundant places. [2023-11-17 12:19:25,346 INFO L231 Difference]: Finished difference. Result has 1185 places, 2248 transitions, 54350 flow [2023-11-17 12:19:25,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=52793, PETRI_DIFFERENCE_MINUEND_PLACES=1151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=54350, PETRI_PLACES=1185, PETRI_TRANSITIONS=2248} [2023-11-17 12:19:25,347 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1164 predicate places. [2023-11-17 12:19:25,347 INFO L495 AbstractCegarLoop]: Abstraction has has 1185 places, 2248 transitions, 54350 flow [2023-11-17 12:19:25,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.4523809523809526) internal successors, (187), 42 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:25,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:25,348 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:25,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-11-17 12:19:25,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:25,548 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:19:25,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash -714025224, now seen corresponding path program 77 times [2023-11-17 12:19:25,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:25,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605331751] [2023-11-17 12:19:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:25,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:26,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:26,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605331751] [2023-11-17 12:19:26,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605331751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:26,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818337608] [2023-11-17 12:19:26,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:19:26,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:26,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:26,088 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:19:26,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-11-17 12:19:26,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:19:26,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:26,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:19:26,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:19:26,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:26,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:26,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-17 12:19:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:19:26,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818337608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:26,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:26,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2023-11-17 12:19:26,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117861740] [2023-11-17 12:19:26,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:26,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:19:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:19:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:19:26,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:19:26,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1185 places, 2248 transitions, 54350 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:26,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:26,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:19:26,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:35,162 INFO L124 PetriNetUnfolderBase]: 5663/9619 cut-off events. [2023-11-17 12:19:35,162 INFO L125 PetriNetUnfolderBase]: For 1859391/1859391 co-relation queries the response was YES. [2023-11-17 12:19:35,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148060 conditions, 9619 events. 5663/9619 cut-off events. For 1859391/1859391 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 69396 event pairs, 704 based on Foata normal form. 1/9568 useless extension candidates. Maximal degree in co-relation 147658. Up to 9155 conditions per place. [2023-11-17 12:19:35,546 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 2073 selfloop transitions, 214 changer transitions 1/2288 dead transitions. [2023-11-17 12:19:35,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1208 places, 2288 transitions, 60715 flow [2023-11-17 12:19:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:19:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:19:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 163 transitions. [2023-11-17 12:19:35,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2263888888888889 [2023-11-17 12:19:35,547 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 163 transitions. [2023-11-17 12:19:35,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 163 transitions. [2023-11-17 12:19:35,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:35,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 163 transitions. [2023-11-17 12:19:35,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:35,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:35,548 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 30.0) internal successors, (750), 25 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:35,548 INFO L175 Difference]: Start difference. First operand has 1185 places, 2248 transitions, 54350 flow. Second operand 24 states and 163 transitions. [2023-11-17 12:19:35,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1208 places, 2288 transitions, 60715 flow [2023-11-17 12:19:46,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1185 places, 2288 transitions, 59625 flow, removed 489 selfloop flow, removed 23 redundant places. [2023-11-17 12:19:46,139 INFO L231 Difference]: Finished difference. Result has 1190 places, 2258 transitions, 54693 flow [2023-11-17 12:19:46,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=53270, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2037, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=54693, PETRI_PLACES=1190, PETRI_TRANSITIONS=2258} [2023-11-17 12:19:46,141 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1169 predicate places. [2023-11-17 12:19:46,141 INFO L495 AbstractCegarLoop]: Abstraction has has 1190 places, 2258 transitions, 54693 flow [2023-11-17 12:19:46,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:46,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:46,141 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:46,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-11-17 12:19:46,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2023-11-17 12:19:46,343 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:19:46,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:46,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1162458032, now seen corresponding path program 78 times [2023-11-17 12:19:46,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:46,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594483635] [2023-11-17 12:19:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:46,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:46,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594483635] [2023-11-17 12:19:46,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594483635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860541164] [2023-11-17 12:19:46,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:19:46,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:46,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:46,749 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:19:46,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-11-17 12:19:46,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:19:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:46,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:19:46,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:19:47,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:47,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:47,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-11-17 12:19:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:19:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860541164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:47,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-11-17 12:19:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120200034] [2023-11-17 12:19:47,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:47,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:19:47,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:19:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:19:47,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2023-11-17 12:19:47,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1190 places, 2258 transitions, 54693 flow. Second operand has 32 states, 32 states have (on average 4.84375) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:47,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:47,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2023-11-17 12:19:47,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 12:19:52,379 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:19:52,379 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:19:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:19:52,478 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:19:52,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-11-17 12:19:52,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:52,678 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 3/30 universal loopers) in iteration 83,while PetriNetUnfolder was constructing finite prefix that currently has 83311 conditions, 5303 events (3203/5302 cut-off events. For 993977/993977 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 38652 event pairs, 314 based on Foata normal form. 0/5967 useless extension candidates. Maximal degree in co-relation 82904. Up to 5037 conditions per place.). [2023-11-17 12:19:52,680 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:19:52,680 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:19:52,680 INFO L445 BasicCegarLoop]: Path program histogram: [78, 1, 1, 1, 1, 1] [2023-11-17 12:19:52,682 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:19:52,682 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:19:52,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:19:52 BasicIcfg [2023-11-17 12:19:52,684 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:19:52,684 INFO L158 Benchmark]: Toolchain (without parser) took 527515.49ms. Allocated memory was 182.5MB in the beginning and 3.9GB in the end (delta: 3.7GB). Free memory was 133.9MB in the beginning and 796.6MB in the end (delta: -662.6MB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2023-11-17 12:19:52,684 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:19:52,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.18ms. Allocated memory is still 182.5MB. Free memory was 133.9MB in the beginning and 122.1MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:19:52,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.77ms. Allocated memory is still 182.5MB. Free memory was 122.1MB in the beginning and 120.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:19:52,684 INFO L158 Benchmark]: Boogie Preprocessor took 21.51ms. Allocated memory is still 182.5MB. Free memory was 120.0MB in the beginning and 118.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:19:52,684 INFO L158 Benchmark]: RCFGBuilder took 587.36ms. Allocated memory is still 182.5MB. Free memory was 118.5MB in the beginning and 132.0MB in the end (delta: -13.4MB). Peak memory consumption was 29.3MB. Max. memory is 8.0GB. [2023-11-17 12:19:52,684 INFO L158 Benchmark]: TraceAbstraction took 526661.85ms. Allocated memory was 182.5MB in the beginning and 3.9GB in the end (delta: 3.7GB). Free memory was 131.5MB in the beginning and 796.6MB in the end (delta: -665.1MB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2023-11-17 12:19:52,685 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.18ms. Allocated memory is still 182.5MB. Free memory was 133.9MB in the beginning and 122.1MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.77ms. Allocated memory is still 182.5MB. Free memory was 122.1MB in the beginning and 120.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.51ms. Allocated memory is still 182.5MB. Free memory was 120.0MB in the beginning and 118.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 587.36ms. Allocated memory is still 182.5MB. Free memory was 118.5MB in the beginning and 132.0MB in the end (delta: -13.4MB). Peak memory consumption was 29.3MB. Max. memory is 8.0GB. * TraceAbstraction took 526661.85ms. Allocated memory was 182.5MB in the beginning and 3.9GB in the end (delta: 3.7GB). Free memory was 131.5MB in the beginning and 796.6MB in the end (delta: -665.1MB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.4s, 26 PlacesBefore, 21 PlacesAfterwards, 22 TransitionsBefore, 17 TransitionsAfterwards, 110 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 146 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 132, independent: 127, independent conditional: 0, independent unconditional: 127, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 68, independent: 63, independent conditional: 0, independent unconditional: 63, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 68, independent: 63, independent conditional: 0, independent unconditional: 63, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 29, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 132, independent: 64, independent conditional: 0, independent unconditional: 64, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 68, unknown conditional: 0, unknown unconditional: 68] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 3/30 universal loopers) in iteration 83,while PetriNetUnfolder was constructing finite prefix that currently has 83311 conditions, 5303 events (3203/5302 cut-off events. For 993977/993977 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 38652 event pairs, 314 based on Foata normal form. 0/5967 useless extension candidates. Maximal degree in co-relation 82904. Up to 5037 conditions per place.). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 3/30 universal loopers) in iteration 83,while PetriNetUnfolder was constructing finite prefix that currently has 83311 conditions, 5303 events (3203/5302 cut-off events. For 993977/993977 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 38652 event pairs, 314 based on Foata normal form. 0/5967 useless extension candidates. Maximal degree in co-relation 82904. Up to 5037 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 3/30 universal loopers) in iteration 83,while PetriNetUnfolder was constructing finite prefix that currently has 83311 conditions, 5303 events (3203/5302 cut-off events. For 993977/993977 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 38652 event pairs, 314 based on Foata normal form. 0/5967 useless extension candidates. Maximal degree in co-relation 82904. Up to 5037 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 35 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 526.6s, OverallIterations: 83, TraceHistogramMax: 3, PathProgramHistogramMax: 78, EmptinessCheckTime: 0.0s, AutomataDifference: 420.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 6078 SdHoareTripleChecker+Valid, 69.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6078 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 64.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1029 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1859 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 75579 IncrementalHoareTripleChecker+Invalid, 78491 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1859 mSolverCounterUnsat, 0 mSDtfsCounter, 75579 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5346 GetRequests, 1945 SyntacticMatches, 31 SemanticMatches, 3370 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 45636 ImplicationChecksByTransitivity, 66.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55209occurred in iteration=80, InterpolantAutomatonStates: 2053, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 78.4s InterpolantComputationTime, 3456 NumberOfCodeBlocks, 3456 NumberOfCodeBlocksAsserted, 267 NumberOfCheckSat, 4919 ConstructedInterpolants, 80 QuantifiedInterpolants, 59618 SizeOfPredicates, 854 NumberOfNonLiveVariables, 16874 ConjunctsInSsa, 3463 ConjunctsInUnsatCore, 243 InterpolantComputations, 5 PerfectInterpolantSequences, 507/3218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown