/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:24:33,640 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:24:33,699 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 12:24:33,720 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:24:33,721 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:24:33,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:24:33,722 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:24:33,722 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:24:33,723 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:24:33,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:24:33,723 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:24:33,724 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:24:33,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:24:33,724 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:24:33,725 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:24:33,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:24:33,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:24:33,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:24:33,726 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:24:33,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:24:33,726 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:24:33,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:24:33,727 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:24:33,728 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:24:33,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:24:33,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:24:33,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:24:33,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:24:33,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:24:33,729 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:24:33,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:24:33,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:24:33,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:24:33,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:24:33,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:24:33,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:24:33,973 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:24:33,975 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:24:33,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-17 12:24:35,205 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:24:35,358 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:24:35,359 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-17 12:24:35,365 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46b546af6/4b3650dc5a8c4613bcc69ee90d098132/FLAGa8a802fb1 [2023-11-17 12:24:35,377 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46b546af6/4b3650dc5a8c4613bcc69ee90d098132 [2023-11-17 12:24:35,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:24:35,380 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:24:35,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:24:35,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:24:35,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:24:35,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181f3c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35, skipping insertion in model container [2023-11-17 12:24:35,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,408 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:24:35,534 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2023-11-17 12:24:35,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:24:35,547 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:24:35,563 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2023-11-17 12:24:35,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:24:35,570 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:24:35,570 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:24:35,576 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:24:35,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35 WrapperNode [2023-11-17 12:24:35,577 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:24:35,578 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:24:35,578 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:24:35,578 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:24:35,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,591 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,607 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2023-11-17 12:24:35,608 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:24:35,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:24:35,609 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:24:35,609 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:24:35,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,617 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,618 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,622 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,630 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:24:35,631 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:24:35,631 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:24:35,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:24:35,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (1/1) ... [2023-11-17 12:24:35,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:24:35,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:35,668 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 12:24:35,673 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 12:24:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:24:35,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:24:35,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:24:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:24:35,693 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:24:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:24:35,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:24:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:24:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:24:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:24:35,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:24:35,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:24:35,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:24:35,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:24:35,700 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 12:24:35,810 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:24:35,815 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:24:36,022 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:24:36,168 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:24:36,168 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:24:36,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:24:36 BoogieIcfgContainer [2023-11-17 12:24:36,170 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:24:36,172 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:24:36,172 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:24:36,176 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:24:36,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:24:35" (1/3) ... [2023-11-17 12:24:36,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460f65dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:24:36, skipping insertion in model container [2023-11-17 12:24:36,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:24:35" (2/3) ... [2023-11-17 12:24:36,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460f65dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:24:36, skipping insertion in model container [2023-11-17 12:24:36,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:24:36" (3/3) ... [2023-11-17 12:24:36,178 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-17 12:24:36,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:24:36,195 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:24:36,195 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:24:36,293 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:24:36,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2023-11-17 12:24:36,366 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 12:24:36,367 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:24:36,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2023-11-17 12:24:36,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2023-11-17 12:24:36,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2023-11-17 12:24:36,376 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:24:36,392 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 19 transitions, 50 flow [2023-11-17 12:24:36,395 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 19 transitions, 50 flow [2023-11-17 12:24:36,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 50 flow [2023-11-17 12:24:36,405 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-17 12:24:36,405 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:24:36,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2023-11-17 12:24:36,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 94 [2023-11-17 12:24:36,643 INFO L134 LiptonReduction]: Checked pairs total: 112 [2023-11-17 12:24:36,643 INFO L136 LiptonReduction]: Total number of compositions: 4 [2023-11-17 12:24:36,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:24:36,674 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;@53bbb9b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:24:36,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:24:36,683 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:24:36,683 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:24:36,684 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:24:36,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:36,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:36,685 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 12:24:36,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1639661612, now seen corresponding path program 1 times [2023-11-17 12:24:36,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:36,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578154868] [2023-11-17 12:24:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:36,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:37,097 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 12:24:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578154868] [2023-11-17 12:24:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578154868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:24:37,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:24:37,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:24:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824205825] [2023-11-17 12:24:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:24:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:24:37,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:37,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:24:37,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:24:37,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2023-11-17 12:24:37,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:37,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:37,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2023-11-17 12:24:37,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:37,242 INFO L124 PetriNetUnfolderBase]: 68/124 cut-off events. [2023-11-17 12:24:37,242 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-17 12:24:37,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 124 events. 68/124 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 312 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 200. Up to 64 conditions per place. [2023-11-17 12:24:37,247 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 20 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-11-17 12:24:37,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 125 flow [2023-11-17 12:24:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:24:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:24:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-17 12:24:37,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-11-17 12:24:37,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-17 12:24:37,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-17 12:24:37,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:37,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-17 12:24:37,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:37,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:37,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:37,271 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 42 transitions. [2023-11-17 12:24:37,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 125 flow [2023-11-17 12:24:37,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:24:37,279 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 46 flow [2023-11-17 12:24:37,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-17 12:24:37,286 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-17 12:24:37,287 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 46 flow [2023-11-17 12:24:37,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:37,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:37,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:37,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:24:37,288 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 12:24:37,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash -442419952, now seen corresponding path program 1 times [2023-11-17 12:24:37,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:37,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686031911] [2023-11-17 12:24:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:37,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:24:37,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:37,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686031911] [2023-11-17 12:24:37,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686031911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:24:37,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:24:37,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:24:37,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109756854] [2023-11-17 12:24:37,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:24:37,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:24:37,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:24:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:24:37,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2023-11-17 12:24:37,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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 12:24:37,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:37,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2023-11-17 12:24:37,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:37,533 INFO L124 PetriNetUnfolderBase]: 87/157 cut-off events. [2023-11-17 12:24:37,534 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-17 12:24:37,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 157 events. 87/157 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 410 event pairs, 46 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 164. Up to 124 conditions per place. [2023-11-17 12:24:37,536 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-17 12:24:37,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 116 flow [2023-11-17 12:24:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:24:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:24:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2023-11-17 12:24:37,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 12:24:37,539 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 39 transitions. [2023-11-17 12:24:37,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 39 transitions. [2023-11-17 12:24:37,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:37,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 39 transitions. [2023-11-17 12:24:37,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:37,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 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 12:24:37,543 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 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 12:24:37,543 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 46 flow. Second operand 4 states and 39 transitions. [2023-11-17 12:24:37,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 116 flow [2023-11-17 12:24:37,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:24:37,545 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 58 flow [2023-11-17 12:24:37,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-17 12:24:37,547 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-17 12:24:37,547 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 58 flow [2023-11-17 12:24:37,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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 12:24:37,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:37,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:37,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:24:37,550 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 12:24:37,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash -365849103, now seen corresponding path program 1 times [2023-11-17 12:24:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:37,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718312246] [2023-11-17 12:24:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:37,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:37,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718312246] [2023-11-17 12:24:37,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718312246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:37,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802767931] [2023-11-17 12:24:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:37,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:37,977 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 12:24:37,997 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 12:24:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:38,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:24:38,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:38,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:38,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802767931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:38,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:38,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 2] total 9 [2023-11-17 12:24:38,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391660562] [2023-11-17 12:24:38,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:38,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:24:38,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:24:38,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:24:38,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:38,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 58 flow. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 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 12:24:38,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:38,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:38,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:38,571 INFO L124 PetriNetUnfolderBase]: 187/339 cut-off events. [2023-11-17 12:24:38,571 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-11-17 12:24:38,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 339 events. 187/339 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1278 event pairs, 33 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 217. Up to 109 conditions per place. [2023-11-17 12:24:38,579 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 49 selfloop transitions, 16 changer transitions 18/83 dead transitions. [2023-11-17 12:24:38,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 83 transitions, 427 flow [2023-11-17 12:24:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:24:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:24:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2023-11-17 12:24:38,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-11-17 12:24:38,583 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 112 transitions. [2023-11-17 12:24:38,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 112 transitions. [2023-11-17 12:24:38,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:38,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 112 transitions. [2023-11-17 12:24:38,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:38,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 26.0) internal successors, (286), 11 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:38,587 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 26.0) internal successors, (286), 11 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:38,588 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 58 flow. Second operand 10 states and 112 transitions. [2023-11-17 12:24:38,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 83 transitions, 427 flow [2023-11-17 12:24:38,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 83 transitions, 407 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 12:24:38,592 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 173 flow [2023-11-17 12:24:38,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=173, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-11-17 12:24:38,593 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-11-17 12:24:38,594 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 173 flow [2023-11-17 12:24:38,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 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 12:24:38,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:38,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:38,609 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 12:24:38,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:38,803 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 12:24:38,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -496427631, now seen corresponding path program 2 times [2023-11-17 12:24:38,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:38,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957990546] [2023-11-17 12:24:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:38,938 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 12:24:38,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:38,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957990546] [2023-11-17 12:24:38,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957990546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:38,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964086600] [2023-11-17 12:24:38,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:24:38,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:38,941 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 12:24:38,960 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 12:24:39,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:24:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:39,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:24:39,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:39,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:39,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964086600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:39,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:39,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-17 12:24:39,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190663438] [2023-11-17 12:24:39,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:39,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:24:39,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:39,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:24:39,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:24:39,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:39,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 173 flow. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:39,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:39,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:39,837 INFO L124 PetriNetUnfolderBase]: 213/374 cut-off events. [2023-11-17 12:24:39,837 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2023-11-17 12:24:39,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 374 events. 213/374 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1379 event pairs, 12 based on Foata normal form. 34/408 useless extension candidates. Maximal degree in co-relation 1133. Up to 168 conditions per place. [2023-11-17 12:24:39,840 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 54 selfloop transitions, 34 changer transitions 8/96 dead transitions. [2023-11-17 12:24:39,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 96 transitions, 660 flow [2023-11-17 12:24:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:24:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:24:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 112 transitions. [2023-11-17 12:24:39,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2023-11-17 12:24:39,842 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 112 transitions. [2023-11-17 12:24:39,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 112 transitions. [2023-11-17 12:24:39,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:39,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 112 transitions. [2023-11-17 12:24:39,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.0) internal successors, (112), 14 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 12:24:39,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 26.0) internal successors, (390), 15 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:39,845 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 26.0) internal successors, (390), 15 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:39,845 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 173 flow. Second operand 14 states and 112 transitions. [2023-11-17 12:24:39,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 96 transitions, 660 flow [2023-11-17 12:24:39,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 96 transitions, 637 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-17 12:24:39,851 INFO L231 Difference]: Finished difference. Result has 54 places, 57 transitions, 440 flow [2023-11-17 12:24:39,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=440, PETRI_PLACES=54, PETRI_TRANSITIONS=57} [2023-11-17 12:24:39,851 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-11-17 12:24:39,852 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 57 transitions, 440 flow [2023-11-17 12:24:39,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:39,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:39,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:39,859 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 12:24:40,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-17 12:24:40,059 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 12:24:40,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1917855429, now seen corresponding path program 3 times [2023-11-17 12:24:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:40,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442521610] [2023-11-17 12:24:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:40,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:40,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442521610] [2023-11-17 12:24:40,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442521610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:40,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823498694] [2023-11-17 12:24:40,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:24:40,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:40,298 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 12:24:40,319 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 12:24:40,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:24:40,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:40,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:24:40,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:40,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:40,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823498694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:40,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:40,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-17 12:24:40,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297189926] [2023-11-17 12:24:40,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:40,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:24:40,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:24:40,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:24:40,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:40,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 57 transitions, 440 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 12:24:40,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:40,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:40,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:41,138 INFO L124 PetriNetUnfolderBase]: 322/548 cut-off events. [2023-11-17 12:24:41,138 INFO L125 PetriNetUnfolderBase]: For 2356/2356 co-relation queries the response was YES. [2023-11-17 12:24:41,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2651 conditions, 548 events. 322/548 cut-off events. For 2356/2356 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2165 event pairs, 16 based on Foata normal form. 14/562 useless extension candidates. Maximal degree in co-relation 2542. Up to 183 conditions per place. [2023-11-17 12:24:41,144 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 85 selfloop transitions, 50 changer transitions 16/151 dead transitions. [2023-11-17 12:24:41,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 151 transitions, 1413 flow [2023-11-17 12:24:41,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:24:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:24:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 141 transitions. [2023-11-17 12:24:41,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3389423076923077 [2023-11-17 12:24:41,148 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 141 transitions. [2023-11-17 12:24:41,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 141 transitions. [2023-11-17 12:24:41,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:41,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 141 transitions. [2023-11-17 12:24:41,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:41,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 26.0) internal successors, (442), 17 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:41,151 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 26.0) internal successors, (442), 17 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:41,151 INFO L175 Difference]: Start difference. First operand has 54 places, 57 transitions, 440 flow. Second operand 16 states and 141 transitions. [2023-11-17 12:24:41,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 151 transitions, 1413 flow [2023-11-17 12:24:41,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 151 transitions, 1284 flow, removed 63 selfloop flow, removed 1 redundant places. [2023-11-17 12:24:41,166 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 783 flow [2023-11-17 12:24:41,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=783, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2023-11-17 12:24:41,169 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2023-11-17 12:24:41,169 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 783 flow [2023-11-17 12:24:41,169 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 12:24:41,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:41,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:41,178 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 12:24:41,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:41,376 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 12:24:41,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash -892875451, now seen corresponding path program 4 times [2023-11-17 12:24:41,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:41,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808325238] [2023-11-17 12:24:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:41,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:41,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:41,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808325238] [2023-11-17 12:24:41,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808325238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:41,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856069464] [2023-11-17 12:24:41,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:24:41,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:41,587 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 12:24:41,604 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 12:24:41,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:24:41,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:41,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:24:41,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:41,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:41,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856069464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:41,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:41,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2023-11-17 12:24:41,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603529573] [2023-11-17 12:24:41,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:41,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:24:41,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:24:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:24:41,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2023-11-17 12:24:41,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 783 flow. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:41,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:41,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2023-11-17 12:24:41,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:42,506 INFO L124 PetriNetUnfolderBase]: 416/709 cut-off events. [2023-11-17 12:24:42,506 INFO L125 PetriNetUnfolderBase]: For 5422/5422 co-relation queries the response was YES. [2023-11-17 12:24:42,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3999 conditions, 709 events. 416/709 cut-off events. For 5422/5422 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3029 event pairs, 23 based on Foata normal form. 28/737 useless extension candidates. Maximal degree in co-relation 3932. Up to 259 conditions per place. [2023-11-17 12:24:42,516 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 101 selfloop transitions, 97 changer transitions 9/207 dead transitions. [2023-11-17 12:24:42,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 207 transitions, 2117 flow [2023-11-17 12:24:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:24:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:24:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 227 transitions. [2023-11-17 12:24:42,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33579881656804733 [2023-11-17 12:24:42,519 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 227 transitions. [2023-11-17 12:24:42,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 227 transitions. [2023-11-17 12:24:42,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:42,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 227 transitions. [2023-11-17 12:24:42,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 8.73076923076923) internal successors, (227), 26 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:42,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 26.0) internal successors, (702), 27 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:42,525 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 26.0) internal successors, (702), 27 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:42,525 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 783 flow. Second operand 26 states and 227 transitions. [2023-11-17 12:24:42,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 207 transitions, 2117 flow [2023-11-17 12:24:42,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 207 transitions, 1958 flow, removed 73 selfloop flow, removed 4 redundant places. [2023-11-17 12:24:42,551 INFO L231 Difference]: Finished difference. Result has 109 places, 135 transitions, 1459 flow [2023-11-17 12:24:42,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1459, PETRI_PLACES=109, PETRI_TRANSITIONS=135} [2023-11-17 12:24:42,554 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-11-17 12:24:42,554 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 135 transitions, 1459 flow [2023-11-17 12:24:42,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:42,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:42,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:42,564 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 12:24:42,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:42,761 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 12:24:42,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash -984612947, now seen corresponding path program 5 times [2023-11-17 12:24:42,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:42,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088368920] [2023-11-17 12:24:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:42,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:42,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:42,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088368920] [2023-11-17 12:24:42,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088368920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:42,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471223815] [2023-11-17 12:24:42,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:24:42,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:42,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:42,923 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 12:24:42,940 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 12:24:42,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:24:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:42,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:24:42,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:43,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471223815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:43,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:24:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173082206] [2023-11-17 12:24:43,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:24:43,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:24:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:24:43,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:43,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 135 transitions, 1459 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:43,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:43,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:43,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:43,893 INFO L124 PetriNetUnfolderBase]: 455/779 cut-off events. [2023-11-17 12:24:43,893 INFO L125 PetriNetUnfolderBase]: For 8556/8556 co-relation queries the response was YES. [2023-11-17 12:24:43,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5039 conditions, 779 events. 455/779 cut-off events. For 8556/8556 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3387 event pairs, 18 based on Foata normal form. 14/793 useless extension candidates. Maximal degree in co-relation 4759. Up to 287 conditions per place. [2023-11-17 12:24:43,903 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 119 selfloop transitions, 99 changer transitions 3/221 dead transitions. [2023-11-17 12:24:43,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 221 transitions, 2771 flow [2023-11-17 12:24:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:24:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:24:43,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 168 transitions. [2023-11-17 12:24:43,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2023-11-17 12:24:43,905 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 168 transitions. [2023-11-17 12:24:43,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 168 transitions. [2023-11-17 12:24:43,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:43,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 168 transitions. [2023-11-17 12:24:43,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.0) internal successors, (168), 21 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:43,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 26.0) internal successors, (572), 22 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:43,907 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 26.0) internal successors, (572), 22 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:43,907 INFO L175 Difference]: Start difference. First operand has 109 places, 135 transitions, 1459 flow. Second operand 21 states and 168 transitions. [2023-11-17 12:24:43,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 221 transitions, 2771 flow [2023-11-17 12:24:43,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 221 transitions, 2513 flow, removed 123 selfloop flow, removed 1 redundant places. [2023-11-17 12:24:43,946 INFO L231 Difference]: Finished difference. Result has 133 places, 159 transitions, 1840 flow [2023-11-17 12:24:43,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1840, PETRI_PLACES=133, PETRI_TRANSITIONS=159} [2023-11-17 12:24:43,946 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-11-17 12:24:43,947 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 159 transitions, 1840 flow [2023-11-17 12:24:43,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:43,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:43,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:43,956 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 12:24:44,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:44,153 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 12:24:44,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash -425197021, now seen corresponding path program 6 times [2023-11-17 12:24:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:44,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226822914] [2023-11-17 12:24:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:44,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:44,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226822914] [2023-11-17 12:24:44,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226822914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:44,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936087047] [2023-11-17 12:24:44,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:24:44,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:44,298 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 12:24:44,314 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 12:24:44,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:24:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:44,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:24:44,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:44,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:44,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936087047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:44,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:44,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-17 12:24:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566295090] [2023-11-17 12:24:44,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:44,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:24:44,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:24:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:24:44,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:44,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 159 transitions, 1840 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 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 12:24:44,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:44,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:44,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:45,377 INFO L124 PetriNetUnfolderBase]: 618/1062 cut-off events. [2023-11-17 12:24:45,378 INFO L125 PetriNetUnfolderBase]: For 13276/13276 co-relation queries the response was YES. [2023-11-17 12:24:45,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7000 conditions, 1062 events. 618/1062 cut-off events. For 13276/13276 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5035 event pairs, 23 based on Foata normal form. 34/1096 useless extension candidates. Maximal degree in co-relation 6661. Up to 682 conditions per place. [2023-11-17 12:24:45,391 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 185 selfloop transitions, 106 changer transitions 2/293 dead transitions. [2023-11-17 12:24:45,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 293 transitions, 3749 flow [2023-11-17 12:24:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:24:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:24:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 200 transitions. [2023-11-17 12:24:45,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2023-11-17 12:24:45,393 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 200 transitions. [2023-11-17 12:24:45,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 200 transitions. [2023-11-17 12:24:45,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:45,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 200 transitions. [2023-11-17 12:24:45,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.0) internal successors, (200), 25 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 12:24:45,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:45,396 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:45,396 INFO L175 Difference]: Start difference. First operand has 133 places, 159 transitions, 1840 flow. Second operand 25 states and 200 transitions. [2023-11-17 12:24:45,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 293 transitions, 3749 flow [2023-11-17 12:24:45,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 293 transitions, 3620 flow, removed 40 selfloop flow, removed 7 redundant places. [2023-11-17 12:24:45,462 INFO L231 Difference]: Finished difference. Result has 163 places, 224 transitions, 2985 flow [2023-11-17 12:24:45,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2985, PETRI_PLACES=163, PETRI_TRANSITIONS=224} [2023-11-17 12:24:45,464 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-11-17 12:24:45,464 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 224 transitions, 2985 flow [2023-11-17 12:24:45,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 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 12:24:45,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:45,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:45,470 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 12:24:45,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:45,671 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 12:24:45,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1501573437, now seen corresponding path program 7 times [2023-11-17 12:24:45,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:45,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184952147] [2023-11-17 12:24:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:45,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:45,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184952147] [2023-11-17 12:24:45,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184952147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212273919] [2023-11-17 12:24:45,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:24:45,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:45,842 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 12:24:45,864 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 12:24:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:45,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:24:45,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:46,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:46,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212273919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:46,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:46,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:24:46,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190573957] [2023-11-17 12:24:46,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:46,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:24:46,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:24:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:24:46,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:46,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 224 transitions, 2985 flow. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:46,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:46,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:46,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:47,113 INFO L124 PetriNetUnfolderBase]: 719/1250 cut-off events. [2023-11-17 12:24:47,113 INFO L125 PetriNetUnfolderBase]: For 22775/22775 co-relation queries the response was YES. [2023-11-17 12:24:47,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9324 conditions, 1250 events. 719/1250 cut-off events. For 22775/22775 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6321 event pairs, 29 based on Foata normal form. 25/1275 useless extension candidates. Maximal degree in co-relation 9072. Up to 798 conditions per place. [2023-11-17 12:24:47,131 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 204 selfloop transitions, 133 changer transitions 9/346 dead transitions. [2023-11-17 12:24:47,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 346 transitions, 4962 flow [2023-11-17 12:24:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:24:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:24:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 227 transitions. [2023-11-17 12:24:47,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118131868131868 [2023-11-17 12:24:47,133 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 227 transitions. [2023-11-17 12:24:47,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 227 transitions. [2023-11-17 12:24:47,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:47,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 227 transitions. [2023-11-17 12:24:47,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:47,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 26.0) internal successors, (754), 29 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:47,136 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 26.0) internal successors, (754), 29 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:47,137 INFO L175 Difference]: Start difference. First operand has 163 places, 224 transitions, 2985 flow. Second operand 28 states and 227 transitions. [2023-11-17 12:24:47,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 346 transitions, 4962 flow [2023-11-17 12:24:47,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 346 transitions, 4605 flow, removed 149 selfloop flow, removed 7 redundant places. [2023-11-17 12:24:47,261 INFO L231 Difference]: Finished difference. Result has 198 places, 268 transitions, 3892 flow [2023-11-17 12:24:47,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3892, PETRI_PLACES=198, PETRI_TRANSITIONS=268} [2023-11-17 12:24:47,262 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-11-17 12:24:47,262 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 268 transitions, 3892 flow [2023-11-17 12:24:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:47,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:47,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:47,272 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 12:24:47,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:47,470 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 12:24:47,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 228108157, now seen corresponding path program 8 times [2023-11-17 12:24:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:47,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720482035] [2023-11-17 12:24:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:47,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:47,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:47,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720482035] [2023-11-17 12:24:47,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720482035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:47,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294795720] [2023-11-17 12:24:47,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:24:47,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:47,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:47,658 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 12:24:47,684 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 12:24:47,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:24:47,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:47,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:24:47,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:47,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:47,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294795720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:47,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:47,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:24:47,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778154497] [2023-11-17 12:24:47,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:47,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:24:47,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:24:47,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:24:47,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2023-11-17 12:24:47,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 268 transitions, 3892 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:47,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:47,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2023-11-17 12:24:47,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:48,696 INFO L124 PetriNetUnfolderBase]: 817/1413 cut-off events. [2023-11-17 12:24:48,696 INFO L125 PetriNetUnfolderBase]: For 34912/34912 co-relation queries the response was YES. [2023-11-17 12:24:48,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11291 conditions, 1413 events. 817/1413 cut-off events. For 34912/34912 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7258 event pairs, 158 based on Foata normal form. 24/1437 useless extension candidates. Maximal degree in co-relation 11068. Up to 1009 conditions per place. [2023-11-17 12:24:48,721 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 231 selfloop transitions, 130 changer transitions 5/366 dead transitions. [2023-11-17 12:24:48,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 366 transitions, 5898 flow [2023-11-17 12:24:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:24:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:24:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 202 transitions. [2023-11-17 12:24:48,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3377926421404682 [2023-11-17 12:24:48,723 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 202 transitions. [2023-11-17 12:24:48,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 202 transitions. [2023-11-17 12:24:48,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:48,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 202 transitions. [2023-11-17 12:24:48,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 8.782608695652174) internal successors, (202), 23 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 12:24:48,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 26.0) internal successors, (624), 24 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:48,725 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 26.0) internal successors, (624), 24 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:48,725 INFO L175 Difference]: Start difference. First operand has 198 places, 268 transitions, 3892 flow. Second operand 23 states and 202 transitions. [2023-11-17 12:24:48,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 366 transitions, 5898 flow [2023-11-17 12:24:48,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 366 transitions, 5134 flow, removed 344 selfloop flow, removed 9 redundant places. [2023-11-17 12:24:48,950 INFO L231 Difference]: Finished difference. Result has 224 places, 311 transitions, 4426 flow [2023-11-17 12:24:48,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4426, PETRI_PLACES=224, PETRI_TRANSITIONS=311} [2023-11-17 12:24:48,951 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 204 predicate places. [2023-11-17 12:24:48,951 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 311 transitions, 4426 flow [2023-11-17 12:24:48,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:48,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:48,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:48,963 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 12:24:49,163 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,SelfDestructingSolverStorable9 [2023-11-17 12:24:49,164 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 12:24:49,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:49,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2073815354, now seen corresponding path program 9 times [2023-11-17 12:24:49,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:49,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517189961] [2023-11-17 12:24:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:49,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:49,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:49,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517189961] [2023-11-17 12:24:49,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517189961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:49,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392753162] [2023-11-17 12:24:49,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:24:49,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:49,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:49,544 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 12:24:49,547 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 12:24:49,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:24:49,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:49,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:24:49,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:49,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:52,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392753162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:52,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:52,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2023-11-17 12:24:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835997156] [2023-11-17 12:24:52,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:52,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:24:52,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:52,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:24:52,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=254, Unknown=1, NotChecked=0, Total=342 [2023-11-17 12:24:52,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:52,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 311 transitions, 4426 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:52,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:52,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:52,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:54,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:24:56,042 INFO L124 PetriNetUnfolderBase]: 1165/2080 cut-off events. [2023-11-17 12:24:56,042 INFO L125 PetriNetUnfolderBase]: For 48966/48966 co-relation queries the response was YES. [2023-11-17 12:24:56,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16775 conditions, 2080 events. 1165/2080 cut-off events. For 48966/48966 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12208 event pairs, 46 based on Foata normal form. 4/2084 useless extension candidates. Maximal degree in co-relation 16484. Up to 939 conditions per place. [2023-11-17 12:24:56,076 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 284 selfloop transitions, 152 changer transitions 69/505 dead transitions. [2023-11-17 12:24:56,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 505 transitions, 7950 flow [2023-11-17 12:24:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:24:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:24:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2023-11-17 12:24:56,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-17 12:24:56,078 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 160 transitions. [2023-11-17 12:24:56,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 160 transitions. [2023-11-17 12:24:56,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:56,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 160 transitions. [2023-11-17 12:24:56,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.0) internal successors, (160), 16 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 12:24:56,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 26.0) internal successors, (442), 17 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:56,080 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 26.0) internal successors, (442), 17 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:56,080 INFO L175 Difference]: Start difference. First operand has 224 places, 311 transitions, 4426 flow. Second operand 16 states and 160 transitions. [2023-11-17 12:24:56,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 505 transitions, 7950 flow [2023-11-17 12:24:56,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 505 transitions, 7555 flow, removed 114 selfloop flow, removed 11 redundant places. [2023-11-17 12:24:56,279 INFO L231 Difference]: Finished difference. Result has 239 places, 363 transitions, 5699 flow [2023-11-17 12:24:56,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5699, PETRI_PLACES=239, PETRI_TRANSITIONS=363} [2023-11-17 12:24:56,280 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 219 predicate places. [2023-11-17 12:24:56,280 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 363 transitions, 5699 flow [2023-11-17 12:24:56,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:56,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:56,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:56,286 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 12:24:56,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:56,485 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 12:24:56,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1683565942, now seen corresponding path program 10 times [2023-11-17 12:24:56,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:56,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617725773] [2023-11-17 12:24:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:56,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:56,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617725773] [2023-11-17 12:24:56,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617725773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:56,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223570422] [2023-11-17 12:24:56,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:24:56,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:56,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:56,742 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 12:24:56,760 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 12:24:56,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:24:56,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:56,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:24:56,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:56,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223570422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:57,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:57,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2023-11-17 12:24:57,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929566709] [2023-11-17 12:24:57,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:57,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:24:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:57,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:24:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:24:57,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:57,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 363 transitions, 5699 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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 12:24:57,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:57,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:57,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:58,452 INFO L124 PetriNetUnfolderBase]: 1067/1925 cut-off events. [2023-11-17 12:24:58,452 INFO L125 PetriNetUnfolderBase]: For 61496/61496 co-relation queries the response was YES. [2023-11-17 12:24:58,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16650 conditions, 1925 events. 1067/1925 cut-off events. For 61496/61496 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11213 event pairs, 21 based on Foata normal form. 54/1979 useless extension candidates. Maximal degree in co-relation 16505. Up to 1201 conditions per place. [2023-11-17 12:24:58,480 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 287 selfloop transitions, 145 changer transitions 25/457 dead transitions. [2023-11-17 12:24:58,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 457 transitions, 7776 flow [2023-11-17 12:24:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:24:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:24:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 204 transitions. [2023-11-17 12:24:58,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31384615384615383 [2023-11-17 12:24:58,482 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 204 transitions. [2023-11-17 12:24:58,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 204 transitions. [2023-11-17 12:24:58,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:58,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 204 transitions. [2023-11-17 12:24:58,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.16) internal successors, (204), 25 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:58,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:58,486 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:58,487 INFO L175 Difference]: Start difference. First operand has 239 places, 363 transitions, 5699 flow. Second operand 25 states and 204 transitions. [2023-11-17 12:24:58,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 457 transitions, 7776 flow [2023-11-17 12:24:58,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 457 transitions, 7221 flow, removed 253 selfloop flow, removed 10 redundant places. [2023-11-17 12:24:58,700 INFO L231 Difference]: Finished difference. Result has 254 places, 375 transitions, 6154 flow [2023-11-17 12:24:58,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6154, PETRI_PLACES=254, PETRI_TRANSITIONS=375} [2023-11-17 12:24:58,701 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 234 predicate places. [2023-11-17 12:24:58,701 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 375 transitions, 6154 flow [2023-11-17 12:24:58,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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 12:24:58,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:24:58,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:24:58,707 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 12:24:58,902 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,SelfDestructingSolverStorable11 [2023-11-17 12:24:58,902 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 12:24:58,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:24:58,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1850330100, now seen corresponding path program 11 times [2023-11-17 12:24:58,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:24:58,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60347366] [2023-11-17 12:24:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:24:58,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:24:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:24:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:24:59,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60347366] [2023-11-17 12:24:59,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60347366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:24:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439083455] [2023-11-17 12:24:59,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:24:59,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:59,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:24:59,121 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 12:24:59,139 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 12:24:59,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:24:59,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:24:59,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:24:59,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:24:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:59,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:24:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:24:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439083455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:24:59,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:24:59,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-17 12:24:59,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804967549] [2023-11-17 12:24:59,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:24:59,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:24:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:24:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:24:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:24:59,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:24:59,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 375 transitions, 6154 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 12:24:59,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:24:59,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:24:59,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:00,576 INFO L124 PetriNetUnfolderBase]: 1154/2052 cut-off events. [2023-11-17 12:25:00,576 INFO L125 PetriNetUnfolderBase]: For 54816/54816 co-relation queries the response was YES. [2023-11-17 12:25:00,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17249 conditions, 2052 events. 1154/2052 cut-off events. For 54816/54816 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11926 event pairs, 51 based on Foata normal form. 42/2094 useless extension candidates. Maximal degree in co-relation 17110. Up to 1221 conditions per place. [2023-11-17 12:25:00,600 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 179 selfloop transitions, 269 changer transitions 3/451 dead transitions. [2023-11-17 12:25:00,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 451 transitions, 8147 flow [2023-11-17 12:25:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:25:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:25:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 135 transitions. [2023-11-17 12:25:00,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28846153846153844 [2023-11-17 12:25:00,602 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 135 transitions. [2023-11-17 12:25:00,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 135 transitions. [2023-11-17 12:25:00,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:00,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 135 transitions. [2023-11-17 12:25:00,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:00,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 26.0) internal successors, (494), 19 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:00,605 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 26.0) internal successors, (494), 19 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:00,605 INFO L175 Difference]: Start difference. First operand has 254 places, 375 transitions, 6154 flow. Second operand 18 states and 135 transitions. [2023-11-17 12:25:00,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 451 transitions, 8147 flow [2023-11-17 12:25:00,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 451 transitions, 7553 flow, removed 223 selfloop flow, removed 18 redundant places. [2023-11-17 12:25:00,885 INFO L231 Difference]: Finished difference. Result has 258 places, 416 transitions, 7347 flow [2023-11-17 12:25:00,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5554, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7347, PETRI_PLACES=258, PETRI_TRANSITIONS=416} [2023-11-17 12:25:00,886 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2023-11-17 12:25:00,886 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 416 transitions, 7347 flow [2023-11-17 12:25:00,886 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 12:25:00,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:00,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:00,891 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 12:25:01,087 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,SelfDestructingSolverStorable12 [2023-11-17 12:25:01,087 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 12:25:01,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 829060538, now seen corresponding path program 12 times [2023-11-17 12:25:01,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:01,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287086006] [2023-11-17 12:25:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:01,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:01,338 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 12:25:01,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287086006] [2023-11-17 12:25:01,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287086006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974415060] [2023-11-17 12:25:01,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:25:01,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:01,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:01,341 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 12:25:01,383 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 12:25:01,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:25:01,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:01,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:25:01,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:01,782 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 12:25:01,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:02,039 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 12:25:02,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974415060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:02,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:02,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-17 12:25:02,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732650325] [2023-11-17 12:25:02,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:02,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:25:02,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:25:02,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:25:02,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:02,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 416 transitions, 7347 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 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 12:25:02,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:02,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:02,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:03,925 INFO L124 PetriNetUnfolderBase]: 1944/3222 cut-off events. [2023-11-17 12:25:03,925 INFO L125 PetriNetUnfolderBase]: For 73084/73084 co-relation queries the response was YES. [2023-11-17 12:25:03,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28621 conditions, 3222 events. 1944/3222 cut-off events. For 73084/73084 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 18626 event pairs, 34 based on Foata normal form. 32/3254 useless extension candidates. Maximal degree in co-relation 28174. Up to 1299 conditions per place. [2023-11-17 12:25:03,964 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 450 selfloop transitions, 368 changer transitions 18/836 dead transitions. [2023-11-17 12:25:03,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 836 transitions, 16163 flow [2023-11-17 12:25:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:25:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:25:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 237 transitions. [2023-11-17 12:25:03,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3038461538461538 [2023-11-17 12:25:03,967 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 237 transitions. [2023-11-17 12:25:03,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 237 transitions. [2023-11-17 12:25:03,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:03,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 237 transitions. [2023-11-17 12:25:03,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.9) internal successors, (237), 30 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:03,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 26.0) internal successors, (806), 31 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:03,969 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 26.0) internal successors, (806), 31 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:03,969 INFO L175 Difference]: Start difference. First operand has 258 places, 416 transitions, 7347 flow. Second operand 30 states and 237 transitions. [2023-11-17 12:25:03,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 836 transitions, 16163 flow [2023-11-17 12:25:04,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 836 transitions, 15523 flow, removed 260 selfloop flow, removed 13 redundant places. [2023-11-17 12:25:04,488 INFO L231 Difference]: Finished difference. Result has 291 places, 640 transitions, 12250 flow [2023-11-17 12:25:04,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7012, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12250, PETRI_PLACES=291, PETRI_TRANSITIONS=640} [2023-11-17 12:25:04,489 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 271 predicate places. [2023-11-17 12:25:04,489 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 640 transitions, 12250 flow [2023-11-17 12:25:04,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 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 12:25:04,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:04,489 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:04,494 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 12:25:04,689 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,SelfDestructingSolverStorable13 [2023-11-17 12:25:04,690 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 12:25:04,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:04,690 INFO L85 PathProgramCache]: Analyzing trace with hash 306663002, now seen corresponding path program 13 times [2023-11-17 12:25:04,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:04,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543927109] [2023-11-17 12:25:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:04,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:04,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:04,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543927109] [2023-11-17 12:25:04,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543927109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:04,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787452704] [2023-11-17 12:25:04,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:25:04,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:04,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:04,945 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 12:25:04,964 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 12:25:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:05,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:25:05,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:05,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:05,512 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 12:25:05,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787452704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:05,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:05,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-17 12:25:05,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925844600] [2023-11-17 12:25:05,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:05,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:25:05,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:05,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:25:05,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:25:05,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:05,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 640 transitions, 12250 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:05,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:05,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:05,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:08,106 INFO L124 PetriNetUnfolderBase]: 2025/3353 cut-off events. [2023-11-17 12:25:08,106 INFO L125 PetriNetUnfolderBase]: For 89944/89944 co-relation queries the response was YES. [2023-11-17 12:25:08,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31984 conditions, 3353 events. 2025/3353 cut-off events. For 89944/89944 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 19502 event pairs, 50 based on Foata normal form. 16/3369 useless extension candidates. Maximal degree in co-relation 31501. Up to 1317 conditions per place. [2023-11-17 12:25:08,146 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 480 selfloop transitions, 397 changer transitions 18/895 dead transitions. [2023-11-17 12:25:08,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 895 transitions, 18156 flow [2023-11-17 12:25:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 12:25:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 12:25:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 321 transitions. [2023-11-17 12:25:08,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30112570356472795 [2023-11-17 12:25:08,148 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 321 transitions. [2023-11-17 12:25:08,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 321 transitions. [2023-11-17 12:25:08,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:08,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 321 transitions. [2023-11-17 12:25:08,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 7.829268292682927) internal successors, (321), 41 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 26.0) internal successors, (1092), 42 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,152 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 26.0) internal successors, (1092), 42 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,152 INFO L175 Difference]: Start difference. First operand has 291 places, 640 transitions, 12250 flow. Second operand 41 states and 321 transitions. [2023-11-17 12:25:08,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 895 transitions, 18156 flow [2023-11-17 12:25:08,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 895 transitions, 17019 flow, removed 530 selfloop flow, removed 5 redundant places. [2023-11-17 12:25:08,828 INFO L231 Difference]: Finished difference. Result has 338 places, 683 transitions, 13282 flow [2023-11-17 12:25:08,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11397, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=13282, PETRI_PLACES=338, PETRI_TRANSITIONS=683} [2023-11-17 12:25:08,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-11-17 12:25:08,829 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 683 transitions, 13282 flow [2023-11-17 12:25:08,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:08,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:08,830 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:08,840 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 12:25:09,035 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,SelfDestructingSolverStorable14 [2023-11-17 12:25:09,036 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 12:25:09,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:09,036 INFO L85 PathProgramCache]: Analyzing trace with hash -198397158, now seen corresponding path program 14 times [2023-11-17 12:25:09,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:09,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019433805] [2023-11-17 12:25:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:09,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019433805] [2023-11-17 12:25:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019433805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837032987] [2023-11-17 12:25:09,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:25:09,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:09,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:09,375 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 12:25:09,396 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 12:25:09,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:25:09,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:09,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:25:09,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:09,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:09,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837032987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:09,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:09,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:25:09,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590307027] [2023-11-17 12:25:09,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:09,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:25:09,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:25:09,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:25:09,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:09,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 683 transitions, 13282 flow. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:09,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:09,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:09,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:14,855 INFO L124 PetriNetUnfolderBase]: 2224/3710 cut-off events. [2023-11-17 12:25:14,855 INFO L125 PetriNetUnfolderBase]: For 138285/138285 co-relation queries the response was YES. [2023-11-17 12:25:14,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35511 conditions, 3710 events. 2224/3710 cut-off events. For 138285/138285 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 22322 event pairs, 151 based on Foata normal form. 42/3752 useless extension candidates. Maximal degree in co-relation 35204. Up to 1474 conditions per place. [2023-11-17 12:25:14,889 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 456 selfloop transitions, 525 changer transitions 10/991 dead transitions. [2023-11-17 12:25:14,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 991 transitions, 20740 flow [2023-11-17 12:25:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 12:25:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 12:25:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 367 transitions. [2023-11-17 12:25:14,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2880690737833595 [2023-11-17 12:25:14,900 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 367 transitions. [2023-11-17 12:25:14,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 367 transitions. [2023-11-17 12:25:14,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:14,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 367 transitions. [2023-11-17 12:25:14,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 7.489795918367347) internal successors, (367), 49 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:14,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 26.0) internal successors, (1300), 50 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:14,905 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 26.0) internal successors, (1300), 50 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:14,905 INFO L175 Difference]: Start difference. First operand has 338 places, 683 transitions, 13282 flow. Second operand 49 states and 367 transitions. [2023-11-17 12:25:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 991 transitions, 20740 flow [2023-11-17 12:25:15,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 991 transitions, 19770 flow, removed 343 selfloop flow, removed 19 redundant places. [2023-11-17 12:25:15,691 INFO L231 Difference]: Finished difference. Result has 380 places, 788 transitions, 16201 flow [2023-11-17 12:25:15,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=12351, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=16201, PETRI_PLACES=380, PETRI_TRANSITIONS=788} [2023-11-17 12:25:15,692 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 360 predicate places. [2023-11-17 12:25:15,692 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 788 transitions, 16201 flow [2023-11-17 12:25:15,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:15,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:15,692 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:15,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:25:15,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:15,893 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 12:25:15,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:15,893 INFO L85 PathProgramCache]: Analyzing trace with hash -427279636, now seen corresponding path program 15 times [2023-11-17 12:25:15,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:15,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788689601] [2023-11-17 12:25:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:15,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:16,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788689601] [2023-11-17 12:25:16,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788689601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697513338] [2023-11-17 12:25:16,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:25:16,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:16,181 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 12:25:16,203 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 12:25:16,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:25:16,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:16,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:25:16,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:16,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:16,777 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 12:25:16,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697513338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:16,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:16,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 12:25:16,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028330583] [2023-11-17 12:25:16,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:16,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:25:16,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:25:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:25:16,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:16,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 788 transitions, 16201 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:16,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:16,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:16,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:20,547 INFO L124 PetriNetUnfolderBase]: 2294/3868 cut-off events. [2023-11-17 12:25:20,547 INFO L125 PetriNetUnfolderBase]: For 163386/163386 co-relation queries the response was YES. [2023-11-17 12:25:20,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39110 conditions, 3868 events. 2294/3868 cut-off events. For 163386/163386 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23652 event pairs, 28 based on Foata normal form. 42/3910 useless extension candidates. Maximal degree in co-relation 38868. Up to 1382 conditions per place. [2023-11-17 12:25:20,587 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 486 selfloop transitions, 453 changer transitions 20/959 dead transitions. [2023-11-17 12:25:20,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 959 transitions, 20641 flow [2023-11-17 12:25:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 12:25:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 12:25:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 330 transitions. [2023-11-17 12:25:20,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28205128205128205 [2023-11-17 12:25:20,589 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 330 transitions. [2023-11-17 12:25:20,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 330 transitions. [2023-11-17 12:25:20,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:20,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 330 transitions. [2023-11-17 12:25:20,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 7.333333333333333) internal successors, (330), 45 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 12:25:20,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 26.0) internal successors, (1196), 46 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:20,598 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 26.0) internal successors, (1196), 46 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:20,598 INFO L175 Difference]: Start difference. First operand has 380 places, 788 transitions, 16201 flow. Second operand 45 states and 330 transitions. [2023-11-17 12:25:20,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 959 transitions, 20641 flow [2023-11-17 12:25:21,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 959 transitions, 19669 flow, removed 377 selfloop flow, removed 24 redundant places. [2023-11-17 12:25:21,788 INFO L231 Difference]: Finished difference. Result has 407 places, 805 transitions, 16839 flow [2023-11-17 12:25:21,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=15220, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=16839, PETRI_PLACES=407, PETRI_TRANSITIONS=805} [2023-11-17 12:25:21,789 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 387 predicate places. [2023-11-17 12:25:21,789 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 805 transitions, 16839 flow [2023-11-17 12:25:21,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:21,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:21,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:21,800 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 12:25:21,995 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,SelfDestructingSolverStorable16 [2023-11-17 12:25:21,995 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 12:25:21,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:21,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1056082396, now seen corresponding path program 16 times [2023-11-17 12:25:21,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:21,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099589529] [2023-11-17 12:25:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:21,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:22,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:22,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099589529] [2023-11-17 12:25:22,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099589529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:22,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129198768] [2023-11-17 12:25:22,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:25:22,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:22,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:22,269 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 12:25:22,291 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 12:25:22,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:25:22,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:22,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:25:22,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:22,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:22,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129198768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:22,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:22,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:25:22,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58249024] [2023-11-17 12:25:22,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:22,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:25:22,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:22,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:25:22,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:25:22,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:22,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 805 transitions, 16839 flow. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:22,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:22,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:22,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:25,679 INFO L124 PetriNetUnfolderBase]: 2316/3878 cut-off events. [2023-11-17 12:25:25,679 INFO L125 PetriNetUnfolderBase]: For 152171/152171 co-relation queries the response was YES. [2023-11-17 12:25:25,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40075 conditions, 3878 events. 2316/3878 cut-off events. For 152171/152171 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23755 event pairs, 240 based on Foata normal form. 8/3886 useless extension candidates. Maximal degree in co-relation 39852. Up to 1817 conditions per place. [2023-11-17 12:25:25,720 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 520 selfloop transitions, 474 changer transitions 16/1010 dead transitions. [2023-11-17 12:25:25,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1010 transitions, 22407 flow [2023-11-17 12:25:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 12:25:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 12:25:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 282 transitions. [2023-11-17 12:25:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2781065088757396 [2023-11-17 12:25:25,723 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 282 transitions. [2023-11-17 12:25:25,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 282 transitions. [2023-11-17 12:25:25,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:25,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 282 transitions. [2023-11-17 12:25:25,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 7.230769230769231) internal successors, (282), 39 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:25,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 26.0) internal successors, (1040), 40 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:25,725 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 26.0) internal successors, (1040), 40 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:25,725 INFO L175 Difference]: Start difference. First operand has 407 places, 805 transitions, 16839 flow. Second operand 39 states and 282 transitions. [2023-11-17 12:25:25,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1010 transitions, 22407 flow [2023-11-17 12:25:26,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1010 transitions, 21941 flow, removed 133 selfloop flow, removed 27 redundant places. [2023-11-17 12:25:26,905 INFO L231 Difference]: Finished difference. Result has 426 places, 833 transitions, 18205 flow [2023-11-17 12:25:26,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=16361, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=18205, PETRI_PLACES=426, PETRI_TRANSITIONS=833} [2023-11-17 12:25:26,906 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 406 predicate places. [2023-11-17 12:25:26,907 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 833 transitions, 18205 flow [2023-11-17 12:25:26,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:26,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:26,907 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:26,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 12:25:27,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 12:25:27,108 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 12:25:27,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash 396345028, now seen corresponding path program 17 times [2023-11-17 12:25:27,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:27,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196585131] [2023-11-17 12:25:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:27,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:27,358 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 12:25:27,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:27,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196585131] [2023-11-17 12:25:27,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196585131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:27,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746605767] [2023-11-17 12:25:27,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:25:27,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:27,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:27,360 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 12:25:27,380 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 12:25:27,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:25:27,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:27,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:25:27,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:27,825 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 12:25:27,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:28,117 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 12:25:28,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746605767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:28,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:28,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-17 12:25:28,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867753532] [2023-11-17 12:25:28,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:28,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:25:28,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:28,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:25:28,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:25:28,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:28,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 833 transitions, 18205 flow. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 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 12:25:28,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:28,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:28,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:31,444 INFO L124 PetriNetUnfolderBase]: 2608/4426 cut-off events. [2023-11-17 12:25:31,445 INFO L125 PetriNetUnfolderBase]: For 225100/225100 co-relation queries the response was YES. [2023-11-17 12:25:31,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47038 conditions, 4426 events. 2608/4426 cut-off events. For 225100/225100 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27896 event pairs, 58 based on Foata normal form. 32/4458 useless extension candidates. Maximal degree in co-relation 46746. Up to 1664 conditions per place. [2023-11-17 12:25:31,520 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 552 selfloop transitions, 549 changer transitions 16/1117 dead transitions. [2023-11-17 12:25:31,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1117 transitions, 25287 flow [2023-11-17 12:25:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-17 12:25:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-17 12:25:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 419 transitions. [2023-11-17 12:25:31,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.293006993006993 [2023-11-17 12:25:31,522 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 419 transitions. [2023-11-17 12:25:31,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 419 transitions. [2023-11-17 12:25:31,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:31,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 419 transitions. [2023-11-17 12:25:31,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 7.618181818181818) internal successors, (419), 55 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:31,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 26.0) internal successors, (1456), 56 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:31,525 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 26.0) internal successors, (1456), 56 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:31,526 INFO L175 Difference]: Start difference. First operand has 426 places, 833 transitions, 18205 flow. Second operand 55 states and 419 transitions. [2023-11-17 12:25:31,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1117 transitions, 25287 flow [2023-11-17 12:25:33,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1117 transitions, 24570 flow, removed 166 selfloop flow, removed 20 redundant places. [2023-11-17 12:25:33,137 INFO L231 Difference]: Finished difference. Result has 474 places, 950 transitions, 21769 flow [2023-11-17 12:25:33,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=17525, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=21769, PETRI_PLACES=474, PETRI_TRANSITIONS=950} [2023-11-17 12:25:33,139 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 454 predicate places. [2023-11-17 12:25:33,139 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 950 transitions, 21769 flow [2023-11-17 12:25:33,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 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 12:25:33,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:33,139 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:33,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 12:25:33,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:33,341 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 12:25:33,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:33,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1630934640, now seen corresponding path program 18 times [2023-11-17 12:25:33,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:33,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703517831] [2023-11-17 12:25:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:33,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:33,647 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 12:25:33,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:33,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703517831] [2023-11-17 12:25:33,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703517831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:33,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177187750] [2023-11-17 12:25:33,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:25:33,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:33,652 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 12:25:33,657 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 12:25:33,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:25:33,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:33,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:25:33,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:33,918 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 12:25:33,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:34,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177187750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:34,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:34,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:25:34,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325681969] [2023-11-17 12:25:34,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:34,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:25:34,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:34,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:25:34,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:25:34,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:34,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 950 transitions, 21769 flow. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 12:25:34,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:34,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:34,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:38,543 INFO L124 PetriNetUnfolderBase]: 3209/5506 cut-off events. [2023-11-17 12:25:38,543 INFO L125 PetriNetUnfolderBase]: For 411872/411872 co-relation queries the response was YES. [2023-11-17 12:25:38,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62129 conditions, 5506 events. 3209/5506 cut-off events. For 411872/411872 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 36727 event pairs, 37 based on Foata normal form. 95/5601 useless extension candidates. Maximal degree in co-relation 61895. Up to 1785 conditions per place. [2023-11-17 12:25:38,627 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 402 selfloop transitions, 888 changer transitions 44/1334 dead transitions. [2023-11-17 12:25:38,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1334 transitions, 32431 flow [2023-11-17 12:25:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-17 12:25:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-17 12:25:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 400 transitions. [2023-11-17 12:25:38,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27972027972027974 [2023-11-17 12:25:38,630 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 400 transitions. [2023-11-17 12:25:38,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 400 transitions. [2023-11-17 12:25:38,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:38,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 400 transitions. [2023-11-17 12:25:38,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 7.2727272727272725) internal successors, (400), 55 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:38,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 26.0) internal successors, (1456), 56 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:38,634 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 26.0) internal successors, (1456), 56 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:38,634 INFO L175 Difference]: Start difference. First operand has 474 places, 950 transitions, 21769 flow. Second operand 55 states and 400 transitions. [2023-11-17 12:25:38,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1334 transitions, 32431 flow [2023-11-17 12:25:41,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1334 transitions, 30440 flow, removed 709 selfloop flow, removed 33 redundant places. [2023-11-17 12:25:41,720 INFO L231 Difference]: Finished difference. Result has 509 places, 1173 transitions, 28543 flow [2023-11-17 12:25:41,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=19979, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=665, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=28543, PETRI_PLACES=509, PETRI_TRANSITIONS=1173} [2023-11-17 12:25:41,722 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 489 predicate places. [2023-11-17 12:25:41,722 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1173 transitions, 28543 flow [2023-11-17 12:25:41,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 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 12:25:41,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:41,722 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:41,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:25:41,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:41,928 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 12:25:41,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1725226774, now seen corresponding path program 19 times [2023-11-17 12:25:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:41,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353246998] [2023-11-17 12:25:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353246998] [2023-11-17 12:25:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353246998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009707750] [2023-11-17 12:25:42,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:25:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:42,197 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 12:25:42,222 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 12:25:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:42,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:25:42,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:42,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:42,932 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 12:25:42,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009707750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:42,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:42,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 12:25:42,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483052624] [2023-11-17 12:25:42,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:42,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:25:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:42,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:25:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:25:42,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:42,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1173 transitions, 28543 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:42,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:42,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:42,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:48,137 INFO L124 PetriNetUnfolderBase]: 3287/5582 cut-off events. [2023-11-17 12:25:48,137 INFO L125 PetriNetUnfolderBase]: For 337439/337439 co-relation queries the response was YES. [2023-11-17 12:25:48,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65240 conditions, 5582 events. 3287/5582 cut-off events. For 337439/337439 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36629 event pairs, 122 based on Foata normal form. 9/5589 useless extension candidates. Maximal degree in co-relation 65020. Up to 4515 conditions per place. [2023-11-17 12:25:48,201 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 914 selfloop transitions, 436 changer transitions 18/1368 dead transitions. [2023-11-17 12:25:48,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 1368 transitions, 35845 flow [2023-11-17 12:25:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:25:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:25:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 277 transitions. [2023-11-17 12:25:48,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28036437246963564 [2023-11-17 12:25:48,202 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 277 transitions. [2023-11-17 12:25:48,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 277 transitions. [2023-11-17 12:25:48,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:48,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 277 transitions. [2023-11-17 12:25:48,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 7.2894736842105265) internal successors, (277), 38 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:48,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 26.0) internal successors, (1014), 39 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:48,204 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 26.0) internal successors, (1014), 39 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:48,204 INFO L175 Difference]: Start difference. First operand has 509 places, 1173 transitions, 28543 flow. Second operand 38 states and 277 transitions. [2023-11-17 12:25:48,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 1368 transitions, 35845 flow [2023-11-17 12:25:51,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1368 transitions, 32956 flow, removed 1283 selfloop flow, removed 34 redundant places. [2023-11-17 12:25:51,940 INFO L231 Difference]: Finished difference. Result has 521 places, 1252 transitions, 29871 flow [2023-11-17 12:25:51,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=26219, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=29871, PETRI_PLACES=521, PETRI_TRANSITIONS=1252} [2023-11-17 12:25:51,941 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 501 predicate places. [2023-11-17 12:25:51,942 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1252 transitions, 29871 flow [2023-11-17 12:25:51,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:51,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:25:51,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:25:51,950 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 12:25:52,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:52,148 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 12:25:52,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:25:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash -993866012, now seen corresponding path program 20 times [2023-11-17 12:25:52,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:25:52,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401552980] [2023-11-17 12:25:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:25:52,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:25:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:25:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:52,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:25:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401552980] [2023-11-17 12:25:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401552980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:25:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502127899] [2023-11-17 12:25:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:25:52,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:25:52,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:25:52,439 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 12:25:52,462 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 12:25:52,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:25:52,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:25:52,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:25:52,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:25:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:52,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:25:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:25:52,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502127899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:25:52,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:25:52,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:25:52,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30484615] [2023-11-17 12:25:52,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:25:52,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:25:52,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:25:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:25:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:25:52,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:25:52,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1252 transitions, 29871 flow. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:52,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:25:52,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:25:52,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:25:57,593 INFO L124 PetriNetUnfolderBase]: 3489/5847 cut-off events. [2023-11-17 12:25:57,593 INFO L125 PetriNetUnfolderBase]: For 423208/423208 co-relation queries the response was YES. [2023-11-17 12:25:57,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69947 conditions, 5847 events. 3489/5847 cut-off events. For 423208/423208 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 38161 event pairs, 901 based on Foata normal form. 36/5881 useless extension candidates. Maximal degree in co-relation 69638. Up to 5368 conditions per place. [2023-11-17 12:25:57,664 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 1175 selfloop transitions, 222 changer transitions 4/1401 dead transitions. [2023-11-17 12:25:57,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1401 transitions, 37237 flow [2023-11-17 12:25:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:25:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:25:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 235 transitions. [2023-11-17 12:25:57,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2738927738927739 [2023-11-17 12:25:57,667 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 235 transitions. [2023-11-17 12:25:57,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 235 transitions. [2023-11-17 12:25:57,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:25:57,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 235 transitions. [2023-11-17 12:25:57,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 7.121212121212121) internal successors, (235), 33 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:57,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 26.0) internal successors, (884), 34 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:57,668 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 26.0) internal successors, (884), 34 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:25:57,668 INFO L175 Difference]: Start difference. First operand has 521 places, 1252 transitions, 29871 flow. Second operand 33 states and 235 transitions. [2023-11-17 12:25:57,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1401 transitions, 37237 flow [2023-11-17 12:26:01,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 1401 transitions, 36335 flow, removed 394 selfloop flow, removed 14 redundant places. [2023-11-17 12:26:01,364 INFO L231 Difference]: Finished difference. Result has 557 places, 1342 transitions, 33527 flow [2023-11-17 12:26:01,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=28983, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1067, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=33527, PETRI_PLACES=557, PETRI_TRANSITIONS=1342} [2023-11-17 12:26:01,366 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 537 predicate places. [2023-11-17 12:26:01,366 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1342 transitions, 33527 flow [2023-11-17 12:26:01,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:01,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:01,367 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:01,375 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 12:26:01,572 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,SelfDestructingSolverStorable21 [2023-11-17 12:26:01,572 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 12:26:01,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1762983046, now seen corresponding path program 21 times [2023-11-17 12:26:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:01,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31744904] [2023-11-17 12:26:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:01,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:01,793 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 12:26:01,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:01,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31744904] [2023-11-17 12:26:01,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31744904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:01,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359037354] [2023-11-17 12:26:01,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:26:01,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:01,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:01,797 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 12:26:01,818 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 12:26:01,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:26:01,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:01,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:26:01,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:02,115 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 12:26:02,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:02,490 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 12:26:02,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359037354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:02,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:02,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-17 12:26:02,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107639408] [2023-11-17 12:26:02,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:02,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:26:02,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:26:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:26:02,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:26:02,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1342 transitions, 33527 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:02,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:02,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:26:02,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:06,635 INFO L124 PetriNetUnfolderBase]: 3837/6449 cut-off events. [2023-11-17 12:26:06,635 INFO L125 PetriNetUnfolderBase]: For 606094/606094 co-relation queries the response was YES. [2023-11-17 12:26:06,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79738 conditions, 6449 events. 3837/6449 cut-off events. For 606094/606094 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 42848 event pairs, 128 based on Foata normal form. 58/6505 useless extension candidates. Maximal degree in co-relation 79410. Up to 5342 conditions per place. [2023-11-17 12:26:06,725 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1278 selfloop transitions, 302 changer transitions 14/1594 dead transitions. [2023-11-17 12:26:06,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1594 transitions, 43778 flow [2023-11-17 12:26:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 12:26:06,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 12:26:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 322 transitions. [2023-11-17 12:26:06,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096153846153846 [2023-11-17 12:26:06,727 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 322 transitions. [2023-11-17 12:26:06,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 322 transitions. [2023-11-17 12:26:06,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:06,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 322 transitions. [2023-11-17 12:26:06,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 8.05) internal successors, (322), 40 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:06,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 26.0) internal successors, (1066), 41 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:06,729 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 26.0) internal successors, (1066), 41 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:06,730 INFO L175 Difference]: Start difference. First operand has 557 places, 1342 transitions, 33527 flow. Second operand 40 states and 322 transitions. [2023-11-17 12:26:06,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1594 transitions, 43778 flow [2023-11-17 12:26:11,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 1594 transitions, 41100 flow, removed 1310 selfloop flow, removed 8 redundant places. [2023-11-17 12:26:11,590 INFO L231 Difference]: Finished difference. Result has 607 places, 1459 transitions, 36233 flow [2023-11-17 12:26:11,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=31418, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=36233, PETRI_PLACES=607, PETRI_TRANSITIONS=1459} [2023-11-17 12:26:11,592 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 587 predicate places. [2023-11-17 12:26:11,592 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 1459 transitions, 36233 flow [2023-11-17 12:26:11,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:11,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:11,592 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:11,598 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 12:26:11,792 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,SelfDestructingSolverStorable22 [2023-11-17 12:26:11,793 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 12:26:11,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:11,793 INFO L85 PathProgramCache]: Analyzing trace with hash -269346544, now seen corresponding path program 22 times [2023-11-17 12:26:11,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584763507] [2023-11-17 12:26:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:12,084 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 12:26:12,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:12,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584763507] [2023-11-17 12:26:12,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584763507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:12,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927692032] [2023-11-17 12:26:12,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:26:12,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:12,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:12,089 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 12:26:12,111 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 12:26:12,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:26:12,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:12,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:26:12,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:12,392 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 12:26:12,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:12,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927692032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:12,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:12,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:26:12,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351207102] [2023-11-17 12:26:12,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:12,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:26:12,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:12,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:26:12,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:26:12,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:26:12,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 1459 transitions, 36233 flow. Second operand has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:12,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:12,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:26:12,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:18,588 INFO L124 PetriNetUnfolderBase]: 3977/6695 cut-off events. [2023-11-17 12:26:18,588 INFO L125 PetriNetUnfolderBase]: For 606105/606105 co-relation queries the response was YES. [2023-11-17 12:26:18,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83102 conditions, 6695 events. 3977/6695 cut-off events. For 606105/606105 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 44895 event pairs, 956 based on Foata normal form. 54/6747 useless extension candidates. Maximal degree in co-relation 82877. Up to 5831 conditions per place. [2023-11-17 12:26:18,689 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 1265 selfloop transitions, 321 changer transitions 3/1589 dead transitions. [2023-11-17 12:26:18,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1589 transitions, 42745 flow [2023-11-17 12:26:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:26:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:26:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 242 transitions. [2023-11-17 12:26:18,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29086538461538464 [2023-11-17 12:26:18,690 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 242 transitions. [2023-11-17 12:26:18,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 242 transitions. [2023-11-17 12:26:18,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:18,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 242 transitions. [2023-11-17 12:26:18,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 7.5625) internal successors, (242), 32 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 12:26:18,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:18,694 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:18,694 INFO L175 Difference]: Start difference. First operand has 607 places, 1459 transitions, 36233 flow. Second operand 32 states and 242 transitions. [2023-11-17 12:26:18,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1589 transitions, 42745 flow [2023-11-17 12:26:23,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 1589 transitions, 40857 flow, removed 887 selfloop flow, removed 18 redundant places. [2023-11-17 12:26:23,851 INFO L231 Difference]: Finished difference. Result has 619 places, 1519 transitions, 37559 flow [2023-11-17 12:26:23,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34437, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=37559, PETRI_PLACES=619, PETRI_TRANSITIONS=1519} [2023-11-17 12:26:23,853 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 599 predicate places. [2023-11-17 12:26:23,853 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1519 transitions, 37559 flow [2023-11-17 12:26:23,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:23,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:23,853 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:23,858 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 12:26:24,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:24,055 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 12:26:24,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1271017286, now seen corresponding path program 23 times [2023-11-17 12:26:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:24,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009598955] [2023-11-17 12:26:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:24,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:24,309 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 12:26:24,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:24,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009598955] [2023-11-17 12:26:24,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009598955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:24,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459045248] [2023-11-17 12:26:24,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:26:24,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:24,313 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 12:26:24,341 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 12:26:24,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:26:24,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:24,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:26:24,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:24,611 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 12:26:24,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:24,909 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 12:26:24,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459045248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:24,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-17 12:26:24,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362186003] [2023-11-17 12:26:24,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:24,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:26:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:26:24,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:26:24,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:26:24,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1519 transitions, 37559 flow. Second operand has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:24,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:24,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:26:24,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:30,106 INFO L124 PetriNetUnfolderBase]: 4280/7230 cut-off events. [2023-11-17 12:26:30,106 INFO L125 PetriNetUnfolderBase]: For 664567/664567 co-relation queries the response was YES. [2023-11-17 12:26:30,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91369 conditions, 7230 events. 4280/7230 cut-off events. For 664567/664567 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 49178 event pairs, 153 based on Foata normal form. 32/7260 useless extension candidates. Maximal degree in co-relation 91010. Up to 5640 conditions per place. [2023-11-17 12:26:30,213 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1230 selfloop transitions, 458 changer transitions 40/1728 dead transitions. [2023-11-17 12:26:30,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 1728 transitions, 46774 flow [2023-11-17 12:26:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:26:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:26:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 297 transitions. [2023-11-17 12:26:30,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3006072874493927 [2023-11-17 12:26:30,214 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 297 transitions. [2023-11-17 12:26:30,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 297 transitions. [2023-11-17 12:26:30,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:30,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 297 transitions. [2023-11-17 12:26:30,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 7.815789473684211) internal successors, (297), 38 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 12:26:30,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 26.0) internal successors, (1014), 39 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:30,217 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 26.0) internal successors, (1014), 39 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:30,217 INFO L175 Difference]: Start difference. First operand has 619 places, 1519 transitions, 37559 flow. Second operand 38 states and 297 transitions. [2023-11-17 12:26:30,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 1728 transitions, 46774 flow [2023-11-17 12:26:36,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1728 transitions, 46155 flow, removed 240 selfloop flow, removed 17 redundant places. [2023-11-17 12:26:36,172 INFO L231 Difference]: Finished difference. Result has 654 places, 1609 transitions, 41601 flow [2023-11-17 12:26:36,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=36874, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=41601, PETRI_PLACES=654, PETRI_TRANSITIONS=1609} [2023-11-17 12:26:36,174 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 634 predicate places. [2023-11-17 12:26:36,174 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 1609 transitions, 41601 flow [2023-11-17 12:26:36,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.863636363636363) internal successors, (107), 22 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:36,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:36,175 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:36,184 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 12:26:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:36,380 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 12:26:36,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1913192122, now seen corresponding path program 24 times [2023-11-17 12:26:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:36,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22534207] [2023-11-17 12:26:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:36,708 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 12:26:36,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:36,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22534207] [2023-11-17 12:26:36,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22534207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:36,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464239653] [2023-11-17 12:26:36,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:26:36,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:36,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:36,713 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 12:26:36,717 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 12:26:36,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:26:36,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:26:36,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:26:36,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:37,082 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 12:26:37,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:37,356 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 12:26:37,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464239653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:37,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:37,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 12:26:37,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632571266] [2023-11-17 12:26:37,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:26:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:26:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:26:37,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:26:37,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 1609 transitions, 41601 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 12:26:37,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:37,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:26:37,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:43,707 INFO L124 PetriNetUnfolderBase]: 4552/7705 cut-off events. [2023-11-17 12:26:43,707 INFO L125 PetriNetUnfolderBase]: For 904538/904538 co-relation queries the response was YES. [2023-11-17 12:26:43,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104697 conditions, 7705 events. 4552/7705 cut-off events. For 904538/904538 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 53181 event pairs, 152 based on Foata normal form. 21/7724 useless extension candidates. Maximal degree in co-relation 104315. Up to 6594 conditions per place. [2023-11-17 12:26:43,833 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 1411 selfloop transitions, 410 changer transitions 11/1832 dead transitions. [2023-11-17 12:26:43,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 1832 transitions, 51831 flow [2023-11-17 12:26:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 12:26:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 12:26:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 300 transitions. [2023-11-17 12:26:43,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2958579881656805 [2023-11-17 12:26:43,834 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 300 transitions. [2023-11-17 12:26:43,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 300 transitions. [2023-11-17 12:26:43,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:26:43,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 300 transitions. [2023-11-17 12:26:43,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 7.6923076923076925) internal successors, (300), 39 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 12:26:43,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 26.0) internal successors, (1040), 40 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:43,836 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 26.0) internal successors, (1040), 40 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:43,836 INFO L175 Difference]: Start difference. First operand has 654 places, 1609 transitions, 41601 flow. Second operand 39 states and 300 transitions. [2023-11-17 12:26:43,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 1832 transitions, 51831 flow [2023-11-17 12:26:51,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 1832 transitions, 50762 flow, removed 475 selfloop flow, removed 18 redundant places. [2023-11-17 12:26:51,340 INFO L231 Difference]: Finished difference. Result has 686 places, 1747 transitions, 46564 flow [2023-11-17 12:26:51,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=40554, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=46564, PETRI_PLACES=686, PETRI_TRANSITIONS=1747} [2023-11-17 12:26:51,342 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 666 predicate places. [2023-11-17 12:26:51,342 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 1747 transitions, 46564 flow [2023-11-17 12:26:51,342 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 12:26:51,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:26:51,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:26:51,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 12:26:51,543 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,SelfDestructingSolverStorable25 [2023-11-17 12:26:51,543 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 12:26:51,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:26:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1188672654, now seen corresponding path program 25 times [2023-11-17 12:26:51,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:26:51,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449436994] [2023-11-17 12:26:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:26:51,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:26:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:51,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:26:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449436994] [2023-11-17 12:26:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449436994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:26:51,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122818462] [2023-11-17 12:26:51,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:26:51,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:26:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:26:51,819 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 12:26:51,822 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 12:26:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:26:51,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:26:51,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:26:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:52,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:26:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:26:52,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122818462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:26:52,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:26:52,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:26:52,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832073134] [2023-11-17 12:26:52,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:26:52,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:26:52,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:26:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:26:52,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:26:52,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:26:52,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 1747 transitions, 46564 flow. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:26:52,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:26:52,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:26:52,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:26:58,213 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 [] [2023-11-17 12:27:02,656 INFO L124 PetriNetUnfolderBase]: 4692/7927 cut-off events. [2023-11-17 12:27:02,657 INFO L125 PetriNetUnfolderBase]: For 1058488/1058488 co-relation queries the response was YES. [2023-11-17 12:27:02,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113578 conditions, 7927 events. 4692/7927 cut-off events. For 1058488/1058488 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 54871 event pairs, 1248 based on Foata normal form. 34/7959 useless extension candidates. Maximal degree in co-relation 113176. Up to 7320 conditions per place. [2023-11-17 12:27:02,809 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 1589 selfloop transitions, 273 changer transitions 7/1869 dead transitions. [2023-11-17 12:27:02,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 1869 transitions, 55164 flow [2023-11-17 12:27:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:27:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:27:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 242 transitions. [2023-11-17 12:27:02,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26593406593406593 [2023-11-17 12:27:02,811 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 242 transitions. [2023-11-17 12:27:02,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 242 transitions. [2023-11-17 12:27:02,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:02,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 242 transitions. [2023-11-17 12:27:02,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 6.914285714285715) internal successors, (242), 35 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 12:27:02,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 26.0) internal successors, (936), 36 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:02,813 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 26.0) internal successors, (936), 36 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:02,813 INFO L175 Difference]: Start difference. First operand has 686 places, 1747 transitions, 46564 flow. Second operand 35 states and 242 transitions. [2023-11-17 12:27:02,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 1869 transitions, 55164 flow [2023-11-17 12:27:13,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 1869 transitions, 52076 flow, removed 1434 selfloop flow, removed 18 redundant places. [2023-11-17 12:27:13,172 INFO L231 Difference]: Finished difference. Result has 719 places, 1807 transitions, 48154 flow [2023-11-17 12:27:13,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=44665, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=48154, PETRI_PLACES=719, PETRI_TRANSITIONS=1807} [2023-11-17 12:27:13,174 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 699 predicate places. [2023-11-17 12:27:13,174 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 1807 transitions, 48154 flow [2023-11-17 12:27:13,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:13,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:13,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:13,183 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 12:27:13,380 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,SelfDestructingSolverStorable26 [2023-11-17 12:27:13,380 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 12:27:13,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1877349274, now seen corresponding path program 26 times [2023-11-17 12:27:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566733055] [2023-11-17 12:27:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:13,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:13,716 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 12:27:13,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:13,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566733055] [2023-11-17 12:27:13,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566733055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:13,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439065004] [2023-11-17 12:27:13,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:27:13,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:13,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:13,721 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 12:27:13,724 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 12:27:13,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:13,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:13,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:27:13,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:14,172 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 12:27:14,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:14,456 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 12:27:14,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439065004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:14,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:14,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 12:27:14,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370130464] [2023-11-17 12:27:14,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:14,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:14,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:14,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:14,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 1807 transitions, 48154 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 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 12:27:14,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:14,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:14,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:21,140 INFO L124 PetriNetUnfolderBase]: 4954/8358 cut-off events. [2023-11-17 12:27:21,141 INFO L125 PetriNetUnfolderBase]: For 1204899/1204899 co-relation queries the response was YES. [2023-11-17 12:27:21,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118205 conditions, 8358 events. 4954/8358 cut-off events. For 1204899/1204899 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 58270 event pairs, 171 based on Foata normal form. 45/8401 useless extension candidates. Maximal degree in co-relation 117946. Up to 7304 conditions per place. [2023-11-17 12:27:21,290 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1707 selfloop transitions, 300 changer transitions 23/2030 dead transitions. [2023-11-17 12:27:21,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 2030 transitions, 58857 flow [2023-11-17 12:27:21,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:27:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:27:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 300 transitions. [2023-11-17 12:27:21,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30364372469635625 [2023-11-17 12:27:21,292 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 300 transitions. [2023-11-17 12:27:21,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 300 transitions. [2023-11-17 12:27:21,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:21,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 300 transitions. [2023-11-17 12:27:21,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 7.894736842105263) internal successors, (300), 38 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 12:27:21,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 26.0) internal successors, (1014), 39 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:21,294 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 26.0) internal successors, (1014), 39 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:21,294 INFO L175 Difference]: Start difference. First operand has 719 places, 1807 transitions, 48154 flow. Second operand 38 states and 300 transitions. [2023-11-17 12:27:21,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 2030 transitions, 58857 flow [2023-11-17 12:27:32,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 2030 transitions, 56906 flow, removed 910 selfloop flow, removed 14 redundant places. [2023-11-17 12:27:32,784 INFO L231 Difference]: Finished difference. Result has 755 places, 1897 transitions, 51180 flow [2023-11-17 12:27:32,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46767, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=51180, PETRI_PLACES=755, PETRI_TRANSITIONS=1897} [2023-11-17 12:27:32,787 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 735 predicate places. [2023-11-17 12:27:32,787 INFO L495 AbstractCegarLoop]: Abstraction has has 755 places, 1897 transitions, 51180 flow [2023-11-17 12:27:32,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 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 12:27:32,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:32,787 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:32,793 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 12:27:32,992 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,SelfDestructingSolverStorable27 [2023-11-17 12:27:32,993 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 12:27:32,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:32,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1903043526, now seen corresponding path program 27 times [2023-11-17 12:27:32,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:32,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564914574] [2023-11-17 12:27:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:32,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:33,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564914574] [2023-11-17 12:27:33,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564914574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989970682] [2023-11-17 12:27:33,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:27:33,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:33,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:33,365 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 12:27:33,369 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 12:27:33,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:27:33,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:33,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:27:33,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:33,702 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 12:27:33,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:34,010 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 12:27:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989970682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:34,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:34,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 12:27:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171888739] [2023-11-17 12:27:34,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:34,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:34,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:34,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:34,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 1897 transitions, 51180 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 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 12:27:34,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:34,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:42,823 INFO L124 PetriNetUnfolderBase]: 5323/8974 cut-off events. [2023-11-17 12:27:42,823 INFO L125 PetriNetUnfolderBase]: For 1374940/1374940 co-relation queries the response was YES. [2023-11-17 12:27:42,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131862 conditions, 8974 events. 5323/8974 cut-off events. For 1374940/1374940 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 63287 event pairs, 167 based on Foata normal form. 11/8983 useless extension candidates. Maximal degree in co-relation 131421. Up to 7269 conditions per place. [2023-11-17 12:27:43,073 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1587 selfloop transitions, 497 changer transitions 51/2135 dead transitions. [2023-11-17 12:27:43,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 2135 transitions, 62374 flow [2023-11-17 12:27:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 12:27:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 12:27:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 299 transitions. [2023-11-17 12:27:43,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2948717948717949 [2023-11-17 12:27:43,078 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 299 transitions. [2023-11-17 12:27:43,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 299 transitions. [2023-11-17 12:27:43,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:43,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 299 transitions. [2023-11-17 12:27:43,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 7.666666666666667) internal successors, (299), 39 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:43,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 26.0) internal successors, (1040), 40 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:43,080 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 26.0) internal successors, (1040), 40 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:43,080 INFO L175 Difference]: Start difference. First operand has 755 places, 1897 transitions, 51180 flow. Second operand 39 states and 299 transitions. [2023-11-17 12:27:43,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 2135 transitions, 62374 flow [2023-11-17 12:27:56,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 2135 transitions, 60109 flow, removed 1011 selfloop flow, removed 18 redundant places. [2023-11-17 12:27:56,366 INFO L231 Difference]: Finished difference. Result has 788 places, 1994 transitions, 54066 flow [2023-11-17 12:27:56,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=49220, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=54066, PETRI_PLACES=788, PETRI_TRANSITIONS=1994} [2023-11-17 12:27:56,369 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 768 predicate places. [2023-11-17 12:27:56,369 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 1994 transitions, 54066 flow [2023-11-17 12:27:56,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 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 12:27:56,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:56,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:56,379 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 12:27:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 12:27:56,578 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 12:27:56,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1725667259, now seen corresponding path program 28 times [2023-11-17 12:27:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:56,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361603188] [2023-11-17 12:27:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:56,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:57,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:57,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361603188] [2023-11-17 12:27:57,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361603188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:57,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087347852] [2023-11-17 12:27:57,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:27:57,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:57,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:57,121 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 12:27:57,124 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 12:27:57,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:27:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:57,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:27:57,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:58,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:34,396 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~counter~0 4294967296))) (and (forall ((v_z_413 Int) (v_y_413 Int) (v_y_410 Int)) (let ((.cse5 (* v_z_413 1431655765)) (.cse8 (* v_y_413 4294967296)) (.cse4 (* v_y_410 4294967296))) (let ((.cse1 (* v_z_413 2863311530)) (.cse2 (* (- 2863311530) v_z_413)) (.cse3 (* 8589934592 v_y_413)) (.cse0 (+ .cse5 .cse8 .cse4)) (.cse7 (+ .cse5 .cse8))) (or (< 4294967295 v_z_413) (< .cse0 0) (< (+ .cse1 4294967295 (* (div (+ (- 1) c_~counter~0 .cse2) 4294967296) 4294967296)) c_~counter~0) (< (+ .cse1 .cse3 (* (div (+ c_~counter~0 (- 4294967297)) 4294967296) 4294967296) 4294967295 .cse4) c_~counter~0) (= (+ (* (div (+ c_~counter~0 .cse2) 4294967296) 4294967296) 8589934592) (+ .cse3 c_~counter~0 .cse4)) (< (+ (* (div (+ (- 1) c_~counter~0 (* (- 1431655765) v_z_413)) 4294967296) 4294967296) .cse5 4294967295) c_~counter~0) (< v_z_413 0) (= (+ v_z_413 .cse6) 4294967296) (< .cse7 0) (< 4294967295 .cse0) (< 4294967295 .cse7))))) (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse9 (* (- 2863311530) v_z_400)) (.cse10 (* v_z_400 1431655765)) (.cse11 (* v_y_400 4294967296))) (or (< 4294967295 v_z_400) (< (+ (* v_z_400 2863311530) 4294967295 (* (div (+ (- 1) c_~counter~0 .cse9) 4294967296) 4294967296)) c_~counter~0) (= (+ v_z_400 .cse6) 4294967296) (< (+ (* (div (+ c_~counter~0 .cse9) 4294967296) 4294967296) .cse10 (* (div (+ 4294967295 (* (- 1) c_~counter~0)) 4294967296) 4294967296)) .cse11) (< (+ .cse10 .cse11) 0) (< v_z_400 0)))))) is different from false [2023-11-17 12:28:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:35,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087347852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:35,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:35,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 27 [2023-11-17 12:28:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473362217] [2023-11-17 12:28:35,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:28:35,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:28:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=584, Unknown=5, NotChecked=52, Total=812 [2023-11-17 12:28:35,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:35,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1994 transitions, 54066 flow. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 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 12:28:35,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:35,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:35,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:38,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:28:41,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:28:47,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:28:53,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:28:55,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:28:57,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:06,523 WARN L539 Checker$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 12:29:08,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:14,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:29:17,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:34,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:37,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:41,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:45,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:47,513 WARN L539 Checker$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 12:29:52,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:29:55,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:29:56,822 INFO L124 PetriNetUnfolderBase]: 6855/11843 cut-off events. [2023-11-17 12:29:56,823 INFO L125 PetriNetUnfolderBase]: For 2171563/2171563 co-relation queries the response was YES. [2023-11-17 12:29:57,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183360 conditions, 11843 events. 6855/11843 cut-off events. For 2171563/2171563 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 90555 event pairs, 210 based on Foata normal form. 11/11852 useless extension candidates. Maximal degree in co-relation 182888. Up to 5093 conditions per place. [2023-11-17 12:29:57,076 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 1453 selfloop transitions, 1165 changer transitions 222/2840 dead transitions. [2023-11-17 12:29:57,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 2840 transitions, 84875 flow [2023-11-17 12:29:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:29:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:29:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 278 transitions. [2023-11-17 12:29:57,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687002652519894 [2023-11-17 12:29:57,079 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 278 transitions. [2023-11-17 12:29:57,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 278 transitions. [2023-11-17 12:29:57,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:57,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 278 transitions. [2023-11-17 12:29:57,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 9.586206896551724) internal successors, (278), 29 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:57,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 26.0) internal successors, (780), 30 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 12:29:57,080 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 26.0) internal successors, (780), 30 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 12:29:57,080 INFO L175 Difference]: Start difference. First operand has 788 places, 1994 transitions, 54066 flow. Second operand 29 states and 278 transitions. [2023-11-17 12:29:57,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 2840 transitions, 84875 flow [2023-11-17 12:30:18,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 2840 transitions, 83046 flow, removed 806 selfloop flow, removed 22 redundant places. [2023-11-17 12:30:18,446 INFO L231 Difference]: Finished difference. Result has 811 places, 2353 transitions, 68550 flow [2023-11-17 12:30:18,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=52993, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=917, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=68550, PETRI_PLACES=811, PETRI_TRANSITIONS=2353} [2023-11-17 12:30:18,449 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 791 predicate places. [2023-11-17 12:30:18,449 INFO L495 AbstractCegarLoop]: Abstraction has has 811 places, 2353 transitions, 68550 flow [2023-11-17 12:30:18,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 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 12:30:18,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:30:18,449 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:30:18,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 12:30:18,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:18,657 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 12:30:18,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:30:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1620937123, now seen corresponding path program 29 times [2023-11-17 12:30:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:30:18,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898753618] [2023-11-17 12:30:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:30:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:30:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:19,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:30:19,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898753618] [2023-11-17 12:30:19,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898753618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:30:19,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170875705] [2023-11-17 12:30:19,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:30:19,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:19,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:30:19,101 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 12:30:19,104 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 12:30:19,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:30:19,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:30:19,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:30:19,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:30:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:19,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:30:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:20,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170875705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:30:20,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:30:20,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-17 12:30:20,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142736708] [2023-11-17 12:30:20,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:30:20,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:30:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:30:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:30:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:30:20,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:30:20,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 811 places, 2353 transitions, 68550 flow. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:20,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:30:20,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:30:20,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:30:32,339 WARN L293 SmtUtils]: Spent 11.79s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:30:39,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:30:48,073 WARN L293 SmtUtils]: Spent 8.60s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:31:04,895 WARN L293 SmtUtils]: Spent 6.81s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:31:12,962 WARN L293 SmtUtils]: Spent 7.71s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:31:14,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:31:17,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:31:21,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:31:23,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:31:31,353 WARN L293 SmtUtils]: Spent 6.82s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:31:44,597 WARN L293 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 94 DAG size of output: 92 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:32:06,975 WARN L293 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 81 DAG size of output: 81 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:32:19,044 WARN L293 SmtUtils]: Spent 8.92s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:32:27,824 WARN L293 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 69 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:32:34,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:32:59,599 WARN L293 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-17 12:33:07,278 WARN L293 SmtUtils]: Spent 7.55s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-11-17 12:33:34,133 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 12:33:34,139 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:33:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-17 12:33:34,157 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:33:34,161 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 12:33:34,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:34,358 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 3/26 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 38110 conditions, 2565 events (1381/2564 cut-off events. For 609560/609560 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 20872 event pairs, 9 based on Foata normal form. 41/3514 useless extension candidates. Maximal degree in co-relation 37829. Up to 826 conditions per place.). [2023-11-17 12:33:34,359 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:33:34,359 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:33:34,359 INFO L445 BasicCegarLoop]: Path program histogram: [29, 1, 1] [2023-11-17 12:33:34,362 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:33:34,362 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:33:34,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:33:34 BasicIcfg [2023-11-17 12:33:34,364 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:33:34,364 INFO L158 Benchmark]: Toolchain (without parser) took 538984.18ms. Allocated memory was 189.8MB in the beginning and 3.5GB in the end (delta: 3.3GB). Free memory was 143.1MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2023-11-17 12:33:34,364 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 189.8MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:33:34,364 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.06ms. Allocated memory is still 189.8MB. Free memory was 143.1MB in the beginning and 131.9MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:33:34,364 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.92ms. Allocated memory is still 189.8MB. Free memory was 131.9MB in the beginning and 130.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:33:34,365 INFO L158 Benchmark]: Boogie Preprocessor took 21.61ms. Allocated memory is still 189.8MB. Free memory was 130.2MB in the beginning and 129.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:33:34,365 INFO L158 Benchmark]: RCFGBuilder took 539.04ms. Allocated memory is still 189.8MB. Free memory was 129.1MB in the beginning and 105.7MB in the end (delta: 23.4MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2023-11-17 12:33:34,365 INFO L158 Benchmark]: TraceAbstraction took 538191.57ms. Allocated memory was 189.8MB in the beginning and 3.5GB in the end (delta: 3.3GB). Free memory was 105.0MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2023-11-17 12:33:34,366 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 189.8MB. Free memory is still 142.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.06ms. Allocated memory is still 189.8MB. Free memory was 143.1MB in the beginning and 131.9MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.92ms. Allocated memory is still 189.8MB. Free memory was 131.9MB in the beginning and 130.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.61ms. Allocated memory is still 189.8MB. Free memory was 130.2MB in the beginning and 129.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 539.04ms. Allocated memory is still 189.8MB. Free memory was 129.1MB in the beginning and 105.7MB in the end (delta: 23.4MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. * TraceAbstraction took 538191.57ms. Allocated memory was 189.8MB in the beginning and 3.5GB in the end (delta: 3.3GB). Free memory was 105.0MB in the beginning and 2.2GB in the end (delta: -2.1GB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 24 PlacesBefore, 20 PlacesAfterwards, 19 TransitionsBefore, 15 TransitionsAfterwards, 94 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 112 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 112, independent: 111, independent conditional: 0, independent unconditional: 111, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 57, independent: 56, independent conditional: 0, independent unconditional: 56, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 57, independent: 56, independent conditional: 0, independent unconditional: 56, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 7, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 112, independent: 55, independent conditional: 0, independent unconditional: 55, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 57, unknown conditional: 0, unknown unconditional: 57] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 3/26 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 38110 conditions, 2565 events (1381/2564 cut-off events. For 609560/609560 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 20872 event pairs, 9 based on Foata normal form. 41/3514 useless extension candidates. Maximal degree in co-relation 37829. Up to 826 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 3/26 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 38110 conditions, 2565 events (1381/2564 cut-off events. For 609560/609560 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 20872 event pairs, 9 based on Foata normal form. 41/3514 useless extension candidates. Maximal degree in co-relation 37829. Up to 826 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (23states, 3/26 universal loopers) in iteration 31,while PetriNetUnfolder was constructing finite prefix that currently has 38110 conditions, 2565 events (1381/2564 cut-off events. For 609560/609560 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 20872 event pairs, 9 based on Foata normal form. 41/3514 useless extension candidates. Maximal degree in co-relation 37829. Up to 826 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 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: 538.0s, OverallIterations: 31, TraceHistogramMax: 3, PathProgramHistogramMax: 29, EmptinessCheckTime: 0.0s, AutomataDifference: 466.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, HoareTripleCheckerStatistics: 20 mSolverCounterUnknown, 3368 SdHoareTripleChecker+Valid, 81.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3368 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 78.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 185 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 957 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17143 IncrementalHoareTripleChecker+Invalid, 18305 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 957 mSolverCounterUnsat, 0 mSDtfsCounter, 17143 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2248 GetRequests, 1045 SyntacticMatches, 26 SemanticMatches, 1177 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15860 ImplicationChecksByTransitivity, 265.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68550occurred in iteration=30, InterpolantAutomatonStates: 904, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 61.9s InterpolantComputationTime, 1033 NumberOfCodeBlocks, 1033 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1447 ConstructedInterpolants, 15 QuantifiedInterpolants, 15451 SizeOfPredicates, 226 NumberOfNonLiveVariables, 3751 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 89 InterpolantComputations, 2 PerfectInterpolantSequences, 89/643 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