/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-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:28:44,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:28:44,596 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 12:28:44,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:28:44,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:28:44,611 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:28:44,611 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:28:44,611 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:28:44,612 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:28:44,612 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:28:44,612 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:28:44,612 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:28:44,613 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:28:44,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:28:44,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:28:44,613 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:28:44,613 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:28:44,614 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:28:44,614 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:28:44,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:28:44,614 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:28:44,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:28:44,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:28:44,615 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:28:44,615 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:28:44,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:28:44,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:28:44,616 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:28:44,616 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:28:44,616 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:28:44,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:28:44,617 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:28:44,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:28:44,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:28:44,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:28:44,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:28:44,809 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:28:44,809 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:28:44,810 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-17 12:28:45,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:28:46,052 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:28:46,052 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-17 12:28:46,059 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe2fc2c01/0d5d7ed83aa749f9a984bc2b646f9165/FLAG48824aa4f [2023-11-17 12:28:46,074 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe2fc2c01/0d5d7ed83aa749f9a984bc2b646f9165 [2023-11-17 12:28:46,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:28:46,078 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:28:46,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:28:46,080 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:28:46,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:28:46,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6176f57c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46, skipping insertion in model container [2023-11-17 12:28:46,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,104 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:28:46,237 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-nonblocking-cntr.wvr.c[2063,2076] [2023-11-17 12:28:46,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:28:46,247 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:28:46,267 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-nonblocking-cntr.wvr.c[2063,2076] [2023-11-17 12:28:46,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:28:46,277 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:28:46,278 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:28:46,282 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:28:46,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46 WrapperNode [2023-11-17 12:28:46,283 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:28:46,284 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:28:46,284 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:28:46,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:28:46,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,298 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,313 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2023-11-17 12:28:46,313 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:28:46,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:28:46,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:28:46,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:28:46,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,345 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:28:46,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:28:46,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:28:46,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:28:46,348 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (1/1) ... [2023-11-17 12:28:46,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:28:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:46,380 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 12:28:46,387 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 12:28:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:28:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:28:46,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:28:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:28:46,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:28:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:28:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:28:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:28:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:28:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:28:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:28:46,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:28:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:28:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:28:46,403 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 12:28:46,460 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:28:46,461 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:28:46,617 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:28:46,710 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:28:46,711 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:28:46,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:28:46 BoogieIcfgContainer [2023-11-17 12:28:46,715 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:28:46,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:28:46,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:28:46,719 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:28:46,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:28:46" (1/3) ... [2023-11-17 12:28:46,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e480ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:28:46, skipping insertion in model container [2023-11-17 12:28:46,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:28:46" (2/3) ... [2023-11-17 12:28:46,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e480ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:28:46, skipping insertion in model container [2023-11-17 12:28:46,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:28:46" (3/3) ... [2023-11-17 12:28:46,722 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-17 12:28:46,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:28:46,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:28:46,739 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:28:46,804 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:28:46,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2023-11-17 12:28:46,842 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 12:28:46,842 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:28:46,845 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 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 12:28:46,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2023-11-17 12:28:46,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2023-11-17 12:28:46,849 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:28:46,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 19 transitions, 50 flow [2023-11-17 12:28:46,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 19 transitions, 50 flow [2023-11-17 12:28:46,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 50 flow [2023-11-17 12:28:46,877 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-17 12:28:46,877 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:28:46,877 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 17 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 12:28:46,878 INFO L119 LiptonReduction]: Number of co-enabled transitions 94 [2023-11-17 12:28:47,015 INFO L134 LiptonReduction]: Checked pairs total: 112 [2023-11-17 12:28:47,015 INFO L136 LiptonReduction]: Total number of compositions: 4 [2023-11-17 12:28:47,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:28:47,039 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;@7389276d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:28:47,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:28:47,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:28:47,047 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:28:47,047 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:28:47,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:47,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:47,048 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 12:28:47,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2118339449, now seen corresponding path program 1 times [2023-11-17 12:28:47,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:47,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372480967] [2023-11-17 12:28:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:47,341 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 12:28:47,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372480967] [2023-11-17 12:28:47,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372480967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:28:47,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:28:47,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:28:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091471628] [2023-11-17 12:28:47,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:28:47,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:28:47,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:28:47,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:28:47,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:47,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:47,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:47,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:47,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:47,443 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-17 12:28:47,444 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-17 12:28:47,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 92 events. 51/92 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 193 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 150. Up to 73 conditions per place. [2023-11-17 12:28:47,448 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-17 12:28:47,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 103 flow [2023-11-17 12:28:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:28:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:28:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 35 transitions. [2023-11-17 12:28:47,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33653846153846156 [2023-11-17 12:28:47,458 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 35 transitions. [2023-11-17 12:28:47,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 35 transitions. [2023-11-17 12:28:47,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:47,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 35 transitions. [2023-11-17 12:28:47,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:47,466 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 12:28:47,466 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 12:28:47,468 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 35 transitions. [2023-11-17 12:28:47,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 103 flow [2023-11-17 12:28:47,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:28:47,474 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-17 12:28:47,476 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-17 12:28:47,479 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-17 12:28:47,479 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-17 12:28:47,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:47,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:47,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:47,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:28:47,480 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 12:28:47,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:47,481 INFO L85 PathProgramCache]: Analyzing trace with hash -639348632, now seen corresponding path program 1 times [2023-11-17 12:28:47,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574231201] [2023-11-17 12:28:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:47,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:47,587 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 12:28:47,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:47,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574231201] [2023-11-17 12:28:47,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574231201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:28:47,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:28:47,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:28:47,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083447989] [2023-11-17 12:28:47,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:28:47,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:28:47,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:28:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:28:47,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:47,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:47,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:47,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:47,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:47,646 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-17 12:28:47,647 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-17 12:28:47,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 116 events. 65/116 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 272 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 70. Up to 92 conditions per place. [2023-11-17 12:28:47,649 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-17 12:28:47,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 123 flow [2023-11-17 12:28:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:28:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:28:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 35 transitions. [2023-11-17 12:28:47,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33653846153846156 [2023-11-17 12:28:47,651 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 35 transitions. [2023-11-17 12:28:47,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 35 transitions. [2023-11-17 12:28:47,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:47,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 35 transitions. [2023-11-17 12:28:47,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:47,655 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 12:28:47,655 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 12:28:47,655 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 35 transitions. [2023-11-17 12:28:47,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 123 flow [2023-11-17 12:28:47,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 12:28:47,657 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-17 12:28:47,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=42, 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=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-17 12:28:47,659 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-17 12:28:47,659 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-17 12:28:47,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:47,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:47,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:47,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:28:47,661 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 12:28:47,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -800226688, now seen corresponding path program 1 times [2023-11-17 12:28:47,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:47,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539877021] [2023-11-17 12:28:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:47,839 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 12:28:47,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539877021] [2023-11-17 12:28:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539877021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257740828] [2023-11-17 12:28:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:47,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:47,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:47,859 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 12:28:47,877 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 12:28:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:47,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:28:47,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:47,992 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 12:28:47,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:48,199 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 12:28:48,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257740828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:48,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:48,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-11-17 12:28:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980651313] [2023-11-17 12:28:48,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:28:48,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:48,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:28:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:28:48,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2023-11-17 12:28:48,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:48,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:48,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2023-11-17 12:28:48,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:48,306 INFO L124 PetriNetUnfolderBase]: 117/211 cut-off events. [2023-11-17 12:28:48,306 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-17 12:28:48,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 211 events. 117/211 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 656 event pairs, 19 based on Foata normal form. 1/166 useless extension candidates. Maximal degree in co-relation 148. Up to 77 conditions per place. [2023-11-17 12:28:48,310 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 32 selfloop transitions, 6 changer transitions 4/42 dead transitions. [2023-11-17 12:28:48,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 216 flow [2023-11-17 12:28:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:28:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:28:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2023-11-17 12:28:48,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2023-11-17 12:28:48,313 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 59 transitions. [2023-11-17 12:28:48,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 59 transitions. [2023-11-17 12:28:48,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:48,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 59 transitions. [2023-11-17 12:28:48,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:48,315 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 12:28:48,315 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 12:28:48,315 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 4 states and 59 transitions. [2023-11-17 12:28:48,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 216 flow [2023-11-17 12:28:48,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 210 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 12:28:48,318 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-11-17 12:28:48,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-17 12:28:48,319 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-17 12:28:48,320 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-11-17 12:28:48,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:48,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:48,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:48,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 12:28:48,525 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 12:28:48,526 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 12:28:48,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1885812888, now seen corresponding path program 2 times [2023-11-17 12:28:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547960440] [2023-11-17 12:28:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:48,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:48,635 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 12:28:48,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547960440] [2023-11-17 12:28:48,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547960440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005267435] [2023-11-17 12:28:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:28:48,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:48,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:48,637 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 12:28:48,655 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 12:28:48,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:48,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:48,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 12:28:48,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:48,736 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 12:28:48,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:48,817 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 12:28:48,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005267435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:48,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:48,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-17 12:28:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537938095] [2023-11-17 12:28:48,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:48,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:28:48,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:28:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:28:48,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:48,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:48,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:48,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:48,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:48,892 INFO L124 PetriNetUnfolderBase]: 143/257 cut-off events. [2023-11-17 12:28:48,892 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-11-17 12:28:48,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 257 events. 143/257 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 817 event pairs, 35 based on Foata normal form. 16/273 useless extension candidates. Maximal degree in co-relation 230. Up to 190 conditions per place. [2023-11-17 12:28:48,895 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 32 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-11-17 12:28:48,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 255 flow [2023-11-17 12:28:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:28:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:28:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2023-11-17 12:28:48,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36153846153846153 [2023-11-17 12:28:48,897 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 47 transitions. [2023-11-17 12:28:48,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 47 transitions. [2023-11-17 12:28:48,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:48,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 47 transitions. [2023-11-17 12:28:48,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:48,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:48,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:48,898 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 47 transitions. [2023-11-17 12:28:48,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 255 flow [2023-11-17 12:28:48,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 255 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 12:28:48,901 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-11-17 12:28:48,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-17 12:28:48,902 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-11-17 12:28:48,903 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-11-17 12:28:48,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:48,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:48,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:48,913 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 12:28:49,110 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 12:28:49,111 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 12:28:49,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash 321012446, now seen corresponding path program 3 times [2023-11-17 12:28:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:49,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153485234] [2023-11-17 12:28:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:49,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:49,223 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 12:28:49,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153485234] [2023-11-17 12:28:49,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153485234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:49,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476164411] [2023-11-17 12:28:49,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:28:49,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:49,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:49,242 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 12:28:49,276 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 12:28:49,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:28:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:49,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:28:49,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:49,382 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 12:28:49,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:49,507 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 12:28:49,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476164411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:49,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:28:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340146610] [2023-11-17 12:28:49,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:28:49,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:28:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:28:49,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:49,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 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 12:28:49,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:49,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:49,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:49,881 INFO L124 PetriNetUnfolderBase]: 209/372 cut-off events. [2023-11-17 12:28:49,881 INFO L125 PetriNetUnfolderBase]: For 633/633 co-relation queries the response was YES. [2023-11-17 12:28:49,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1407 conditions, 372 events. 209/372 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1360 event pairs, 8 based on Foata normal form. 12/384 useless extension candidates. Maximal degree in co-relation 749. Up to 127 conditions per place. [2023-11-17 12:28:49,883 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 65 selfloop transitions, 43 changer transitions 19/127 dead transitions. [2023-11-17 12:28:49,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 127 transitions, 886 flow [2023-11-17 12:28:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:28:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:28:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 190 transitions. [2023-11-17 12:28:49,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30448717948717946 [2023-11-17 12:28:49,885 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 190 transitions. [2023-11-17 12:28:49,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 190 transitions. [2023-11-17 12:28:49,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:49,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 190 transitions. [2023-11-17 12:28:49,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.916666666666667) internal successors, (190), 24 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:49,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 26.0) internal successors, (650), 25 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:49,888 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 26.0) internal successors, (650), 25 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:49,888 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 24 states and 190 transitions. [2023-11-17 12:28:49,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 127 transitions, 886 flow [2023-11-17 12:28:49,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 127 transitions, 868 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-17 12:28:49,891 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 523 flow [2023-11-17 12:28:49,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=523, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-17 12:28:49,892 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-17 12:28:49,892 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 523 flow [2023-11-17 12:28:49,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 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 12:28:49,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:49,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:49,909 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 12:28:50,097 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 12:28:50,097 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 12:28:50,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1293881852, now seen corresponding path program 4 times [2023-11-17 12:28:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:50,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239904799] [2023-11-17 12:28:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:50,193 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 12:28:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239904799] [2023-11-17 12:28:50,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239904799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:50,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026802661] [2023-11-17 12:28:50,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:28:50,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:50,210 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 12:28:50,221 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 12:28:50,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:28:50,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:50,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:28:50,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:50,330 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 12:28:50,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:50,387 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 12:28:50,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026802661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:50,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:50,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:28:50,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250741380] [2023-11-17 12:28:50,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:50,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:28:50,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:28:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:28:50,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:50,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 523 flow. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:50,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:50,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:50,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:50,668 INFO L124 PetriNetUnfolderBase]: 245/435 cut-off events. [2023-11-17 12:28:50,668 INFO L125 PetriNetUnfolderBase]: For 2461/2461 co-relation queries the response was YES. [2023-11-17 12:28:50,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 435 events. 245/435 cut-off events. For 2461/2461 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1608 event pairs, 9 based on Foata normal form. 30/465 useless extension candidates. Maximal degree in co-relation 1577. Up to 157 conditions per place. [2023-11-17 12:28:50,672 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 75 selfloop transitions, 62 changer transitions 0/137 dead transitions. [2023-11-17 12:28:50,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 1304 flow [2023-11-17 12:28:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:28:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:28:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 150 transitions. [2023-11-17 12:28:50,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30364372469635625 [2023-11-17 12:28:50,673 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 150 transitions. [2023-11-17 12:28:50,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 150 transitions. [2023-11-17 12:28:50,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:50,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 150 transitions. [2023-11-17 12:28:50,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:50,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 26.0) internal successors, (520), 20 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:50,675 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 26.0) internal successors, (520), 20 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:50,675 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 523 flow. Second operand 19 states and 150 transitions. [2023-11-17 12:28:50,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 1304 flow [2023-11-17 12:28:50,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 1053 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-11-17 12:28:50,683 INFO L231 Difference]: Finished difference. Result has 79 places, 98 transitions, 849 flow [2023-11-17 12:28:50,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=849, PETRI_PLACES=79, PETRI_TRANSITIONS=98} [2023-11-17 12:28:50,683 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-11-17 12:28:50,683 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 98 transitions, 849 flow [2023-11-17 12:28:50,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:50,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:50,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:50,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 12:28:50,888 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 12:28:50,888 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 12:28:50,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:50,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1507426098, now seen corresponding path program 5 times [2023-11-17 12:28:50,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:50,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548307871] [2023-11-17 12:28:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:50,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:50,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:50,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548307871] [2023-11-17 12:28:50,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548307871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:50,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160726608] [2023-11-17 12:28:50,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:28:50,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:50,985 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 12:28:50,986 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 12:28:51,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:28:51,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:51,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 12:28:51,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:51,109 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 12:28:51,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:51,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160726608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:51,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:51,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:28:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165854127] [2023-11-17 12:28:51,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:51,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:28:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:28:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:28:51,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:51,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 98 transitions, 849 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:51,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:51,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:51,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:51,498 INFO L124 PetriNetUnfolderBase]: 345/637 cut-off events. [2023-11-17 12:28:51,498 INFO L125 PetriNetUnfolderBase]: For 7890/7890 co-relation queries the response was YES. [2023-11-17 12:28:51,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3341 conditions, 637 events. 345/637 cut-off events. For 7890/7890 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2816 event pairs, 11 based on Foata normal form. 30/667 useless extension candidates. Maximal degree in co-relation 3138. Up to 215 conditions per place. [2023-11-17 12:28:51,503 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 82 selfloop transitions, 98 changer transitions 1/181 dead transitions. [2023-11-17 12:28:51,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 181 transitions, 1823 flow [2023-11-17 12:28:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:28:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:28:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 172 transitions. [2023-11-17 12:28:51,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3006993006993007 [2023-11-17 12:28:51,504 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 172 transitions. [2023-11-17 12:28:51,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 172 transitions. [2023-11-17 12:28:51,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:51,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 172 transitions. [2023-11-17 12:28:51,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.818181818181818) internal successors, (172), 22 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:51,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 26.0) internal successors, (598), 23 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:51,506 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 26.0) internal successors, (598), 23 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:51,506 INFO L175 Difference]: Start difference. First operand has 79 places, 98 transitions, 849 flow. Second operand 22 states and 172 transitions. [2023-11-17 12:28:51,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 181 transitions, 1823 flow [2023-11-17 12:28:51,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 181 transitions, 1705 flow, removed 59 selfloop flow, removed 0 redundant places. [2023-11-17 12:28:51,521 INFO L231 Difference]: Finished difference. Result has 108 places, 133 transitions, 1389 flow [2023-11-17 12:28:51,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1389, PETRI_PLACES=108, PETRI_TRANSITIONS=133} [2023-11-17 12:28:51,521 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-11-17 12:28:51,521 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 133 transitions, 1389 flow [2023-11-17 12:28:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:51,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:51,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:51,529 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 12:28:51,728 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 12:28:51,728 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 12:28:51,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash 649740860, now seen corresponding path program 6 times [2023-11-17 12:28:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:51,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911087852] [2023-11-17 12:28:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:51,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:51,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911087852] [2023-11-17 12:28:51,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911087852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:51,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814334537] [2023-11-17 12:28:51,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:28:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:51,804 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 12:28:51,808 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 12:28:51,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:28:51,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:51,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:28:51,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:51,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:51,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814334537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:51,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:51,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:28:51,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582462107] [2023-11-17 12:28:51,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:51,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:28:51,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:51,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:28:51,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:28:51,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:51,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 133 transitions, 1389 flow. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:51,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:51,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:51,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:52,245 INFO L124 PetriNetUnfolderBase]: 337/601 cut-off events. [2023-11-17 12:28:52,246 INFO L125 PetriNetUnfolderBase]: For 8123/8123 co-relation queries the response was YES. [2023-11-17 12:28:52,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 601 events. 337/601 cut-off events. For 8123/8123 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2521 event pairs, 16 based on Foata normal form. 6/607 useless extension candidates. Maximal degree in co-relation 3505. Up to 304 conditions per place. [2023-11-17 12:28:52,252 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 79 selfloop transitions, 84 changer transitions 4/167 dead transitions. [2023-11-17 12:28:52,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 167 transitions, 2048 flow [2023-11-17 12:28:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:28:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:28:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 119 transitions. [2023-11-17 12:28:52,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2860576923076923 [2023-11-17 12:28:52,253 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 119 transitions. [2023-11-17 12:28:52,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 119 transitions. [2023-11-17 12:28:52,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:52,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 119 transitions. [2023-11-17 12:28:52,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.4375) internal successors, (119), 16 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 12:28:52,254 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 12:28:52,254 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 12:28:52,254 INFO L175 Difference]: Start difference. First operand has 108 places, 133 transitions, 1389 flow. Second operand 16 states and 119 transitions. [2023-11-17 12:28:52,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 167 transitions, 2048 flow [2023-11-17 12:28:52,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 167 transitions, 1902 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-11-17 12:28:52,290 INFO L231 Difference]: Finished difference. Result has 117 places, 136 transitions, 1587 flow [2023-11-17 12:28:52,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1587, PETRI_PLACES=117, PETRI_TRANSITIONS=136} [2023-11-17 12:28:52,293 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 97 predicate places. [2023-11-17 12:28:52,293 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 136 transitions, 1587 flow [2023-11-17 12:28:52,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:52,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:52,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:52,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 12:28:52,498 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 12:28:52,498 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 12:28:52,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1841679288, now seen corresponding path program 7 times [2023-11-17 12:28:52,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:52,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224447417] [2023-11-17 12:28:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:52,624 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 12:28:52,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224447417] [2023-11-17 12:28:52,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224447417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:52,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741180049] [2023-11-17 12:28:52,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:28:52,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:52,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:52,641 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 12:28:52,661 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 12:28:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:52,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:28:52,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:52,782 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 12:28:52,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:52,862 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 12:28:52,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741180049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:52,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:52,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-17 12:28:52,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506279561] [2023-11-17 12:28:52,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:52,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:28:52,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:28:52,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:28:52,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:52,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 136 transitions, 1587 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:52,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:52,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:52,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:53,339 INFO L124 PetriNetUnfolderBase]: 484/854 cut-off events. [2023-11-17 12:28:53,340 INFO L125 PetriNetUnfolderBase]: For 9740/9740 co-relation queries the response was YES. [2023-11-17 12:28:53,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 854 events. 484/854 cut-off events. For 9740/9740 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3927 event pairs, 11 based on Foata normal form. 10/864 useless extension candidates. Maximal degree in co-relation 4977. Up to 262 conditions per place. [2023-11-17 12:28:53,346 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 109 selfloop transitions, 146 changer transitions 0/255 dead transitions. [2023-11-17 12:28:53,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 255 transitions, 3190 flow [2023-11-17 12:28:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:28:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:28:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 210 transitions. [2023-11-17 12:28:53,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27851458885941643 [2023-11-17 12:28:53,348 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 210 transitions. [2023-11-17 12:28:53,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 210 transitions. [2023-11-17 12:28:53,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:53,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 210 transitions. [2023-11-17 12:28:53,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 7.241379310344827) internal successors, (210), 29 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:53,349 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 12:28:53,350 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 12:28:53,350 INFO L175 Difference]: Start difference. First operand has 117 places, 136 transitions, 1587 flow. Second operand 29 states and 210 transitions. [2023-11-17 12:28:53,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 255 transitions, 3190 flow [2023-11-17 12:28:53,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 255 transitions, 2920 flow, removed 55 selfloop flow, removed 10 redundant places. [2023-11-17 12:28:53,403 INFO L231 Difference]: Finished difference. Result has 141 places, 202 transitions, 2641 flow [2023-11-17 12:28:53,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2641, PETRI_PLACES=141, PETRI_TRANSITIONS=202} [2023-11-17 12:28:53,403 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-11-17 12:28:53,403 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 202 transitions, 2641 flow [2023-11-17 12:28:53,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:53,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:53,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:53,421 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 12:28:53,608 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 12:28:53,608 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 12:28:53,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1773102912, now seen corresponding path program 8 times [2023-11-17 12:28:53,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:53,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037354015] [2023-11-17 12:28:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:53,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:53,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:53,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037354015] [2023-11-17 12:28:53,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037354015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:53,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990707673] [2023-11-17 12:28:53,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:28:53,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:53,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:53,699 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 12:28:53,713 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 12:28:53,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:53,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:53,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:28:53,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:53,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:53,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990707673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:53,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:53,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:28:53,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202009449] [2023-11-17 12:28:53,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:53,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:28:53,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:53,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:28:53,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:28:53,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:53,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 202 transitions, 2641 flow. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:53,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:53,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:53,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:54,185 INFO L124 PetriNetUnfolderBase]: 544/946 cut-off events. [2023-11-17 12:28:54,185 INFO L125 PetriNetUnfolderBase]: For 13634/13634 co-relation queries the response was YES. [2023-11-17 12:28:54,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6785 conditions, 946 events. 544/946 cut-off events. For 13634/13634 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4420 event pairs, 17 based on Foata normal form. 16/962 useless extension candidates. Maximal degree in co-relation 6341. Up to 741 conditions per place. [2023-11-17 12:28:54,193 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 188 selfloop transitions, 66 changer transitions 2/256 dead transitions. [2023-11-17 12:28:54,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 256 transitions, 3832 flow [2023-11-17 12:28:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:28:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:28:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 117 transitions. [2023-11-17 12:28:54,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28125 [2023-11-17 12:28:54,194 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 117 transitions. [2023-11-17 12:28:54,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 117 transitions. [2023-11-17 12:28:54,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:54,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 117 transitions. [2023-11-17 12:28:54,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:54,195 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 12:28:54,196 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 12:28:54,196 INFO L175 Difference]: Start difference. First operand has 141 places, 202 transitions, 2641 flow. Second operand 16 states and 117 transitions. [2023-11-17 12:28:54,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 256 transitions, 3832 flow [2023-11-17 12:28:54,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 256 transitions, 3644 flow, removed 47 selfloop flow, removed 14 redundant places. [2023-11-17 12:28:54,265 INFO L231 Difference]: Finished difference. Result has 148 places, 230 transitions, 3162 flow [2023-11-17 12:28:54,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3162, PETRI_PLACES=148, PETRI_TRANSITIONS=230} [2023-11-17 12:28:54,266 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-11-17 12:28:54,266 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 230 transitions, 3162 flow [2023-11-17 12:28:54,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:54,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:54,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:54,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 12:28:54,471 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 12:28:54,471 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 12:28:54,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:54,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1800357620, now seen corresponding path program 9 times [2023-11-17 12:28:54,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:54,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267261378] [2023-11-17 12:28:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:54,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:54,578 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 12:28:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267261378] [2023-11-17 12:28:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267261378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965294477] [2023-11-17 12:28:54,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:28:54,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:54,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:54,580 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 12:28:54,594 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 12:28:54,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:28:54,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:54,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:28:54,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:54,708 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 12:28:54,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:54,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965294477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:54,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:54,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-17 12:28:54,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831251597] [2023-11-17 12:28:54,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:54,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:28:54,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:28:54,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:28:54,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:54,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 230 transitions, 3162 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 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 12:28:54,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:54,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:54,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:55,149 INFO L124 PetriNetUnfolderBase]: 532/944 cut-off events. [2023-11-17 12:28:55,149 INFO L125 PetriNetUnfolderBase]: For 17682/17682 co-relation queries the response was YES. [2023-11-17 12:28:55,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6688 conditions, 944 events. 532/944 cut-off events. For 17682/17682 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4527 event pairs, 27 based on Foata normal form. 30/974 useless extension candidates. Maximal degree in co-relation 6265. Up to 721 conditions per place. [2023-11-17 12:28:55,157 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 199 selfloop transitions, 62 changer transitions 3/264 dead transitions. [2023-11-17 12:28:55,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 264 transitions, 3791 flow [2023-11-17 12:28:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:28:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:28:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 151 transitions. [2023-11-17 12:28:55,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903846153846154 [2023-11-17 12:28:55,159 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 151 transitions. [2023-11-17 12:28:55,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 151 transitions. [2023-11-17 12:28:55,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:55,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 151 transitions. [2023-11-17 12:28:55,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.55) internal successors, (151), 20 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 26.0) internal successors, (546), 21 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,161 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 26.0) internal successors, (546), 21 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,161 INFO L175 Difference]: Start difference. First operand has 148 places, 230 transitions, 3162 flow. Second operand 20 states and 151 transitions. [2023-11-17 12:28:55,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 264 transitions, 3791 flow [2023-11-17 12:28:55,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 264 transitions, 3554 flow, removed 97 selfloop flow, removed 7 redundant places. [2023-11-17 12:28:55,207 INFO L231 Difference]: Finished difference. Result has 160 places, 223 transitions, 2926 flow [2023-11-17 12:28:55,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2926, PETRI_PLACES=160, PETRI_TRANSITIONS=223} [2023-11-17 12:28:55,208 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 140 predicate places. [2023-11-17 12:28:55,208 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 223 transitions, 2926 flow [2023-11-17 12:28:55,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 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 12:28:55,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:55,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:55,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 12:28:55,425 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 12:28:55,426 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 12:28:55,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1761071689, now seen corresponding path program 10 times [2023-11-17 12:28:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866187545] [2023-11-17 12:28:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:55,505 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 12:28:55,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:55,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866187545] [2023-11-17 12:28:55,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866187545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:55,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060828291] [2023-11-17 12:28:55,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:28:55,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:55,507 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 12:28:55,523 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 12:28:55,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:28:55,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:55,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:28:55,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:55,589 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 12:28:55,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060828291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:55,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2023-11-17 12:28:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512363457] [2023-11-17 12:28:55,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:55,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:28:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:28:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:28:55,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:55,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 223 transitions, 2926 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:55,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:55,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:55,869 INFO L124 PetriNetUnfolderBase]: 770/1351 cut-off events. [2023-11-17 12:28:55,869 INFO L125 PetriNetUnfolderBase]: For 17141/17141 co-relation queries the response was YES. [2023-11-17 12:28:55,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 1351 events. 770/1351 cut-off events. For 17141/17141 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7015 event pairs, 30 based on Foata normal form. 1/1352 useless extension candidates. Maximal degree in co-relation 9135. Up to 705 conditions per place. [2023-11-17 12:28:55,882 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 219 selfloop transitions, 88 changer transitions 38/345 dead transitions. [2023-11-17 12:28:55,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 345 transitions, 5099 flow [2023-11-17 12:28:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:28:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:28:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-17 12:28:55,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2023-11-17 12:28:55,882 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-17 12:28:55,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-17 12:28:55,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:55,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-17 12:28:55,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 12:28:55,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,883 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,883 INFO L175 Difference]: Start difference. First operand has 160 places, 223 transitions, 2926 flow. Second operand 6 states and 73 transitions. [2023-11-17 12:28:55,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 345 transitions, 5099 flow [2023-11-17 12:28:55,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 345 transitions, 4886 flow, removed 42 selfloop flow, removed 16 redundant places. [2023-11-17 12:28:55,948 INFO L231 Difference]: Finished difference. Result has 151 places, 266 transitions, 3741 flow [2023-11-17 12:28:55,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3741, PETRI_PLACES=151, PETRI_TRANSITIONS=266} [2023-11-17 12:28:55,949 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-11-17 12:28:55,949 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 266 transitions, 3741 flow [2023-11-17 12:28:55,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:55,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:55,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:55,956 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 12:28:56,153 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 12:28:56,154 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 12:28:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 656443255, now seen corresponding path program 11 times [2023-11-17 12:28:56,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:56,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528732379] [2023-11-17 12:28:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:56,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:56,253 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 12:28:56,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:56,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528732379] [2023-11-17 12:28:56,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528732379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:56,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555908893] [2023-11-17 12:28:56,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:28:56,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:56,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:56,255 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 12:28:56,283 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 12:28:56,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:28:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:56,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:28:56,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:56,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:56,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555908893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:56,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:56,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2023-11-17 12:28:56,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236549332] [2023-11-17 12:28:56,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:56,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:28:56,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:56,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:28:56,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:28:56,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:56,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 266 transitions, 3741 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:56,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:56,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:56,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:56,747 INFO L124 PetriNetUnfolderBase]: 749/1344 cut-off events. [2023-11-17 12:28:56,748 INFO L125 PetriNetUnfolderBase]: For 24703/24703 co-relation queries the response was YES. [2023-11-17 12:28:56,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10091 conditions, 1344 events. 749/1344 cut-off events. For 24703/24703 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7173 event pairs, 59 based on Foata normal form. 34/1378 useless extension candidates. Maximal degree in co-relation 9544. Up to 1015 conditions per place. [2023-11-17 12:28:56,758 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 240 selfloop transitions, 81 changer transitions 15/336 dead transitions. [2023-11-17 12:28:56,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 336 transitions, 5134 flow [2023-11-17 12:28:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:28:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:28:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 161 transitions. [2023-11-17 12:28:56,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3259109311740891 [2023-11-17 12:28:56,759 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 161 transitions. [2023-11-17 12:28:56,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 161 transitions. [2023-11-17 12:28:56,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:56,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 161 transitions. [2023-11-17 12:28:56,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.473684210526315) internal successors, (161), 19 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:56,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 26.0) internal successors, (520), 20 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:56,761 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 26.0) internal successors, (520), 20 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:56,761 INFO L175 Difference]: Start difference. First operand has 151 places, 266 transitions, 3741 flow. Second operand 19 states and 161 transitions. [2023-11-17 12:28:56,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 336 transitions, 5134 flow [2023-11-17 12:28:56,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 336 transitions, 5072 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-11-17 12:28:56,850 INFO L231 Difference]: Finished difference. Result has 174 places, 281 transitions, 4249 flow [2023-11-17 12:28:56,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3703, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4249, PETRI_PLACES=174, PETRI_TRANSITIONS=281} [2023-11-17 12:28:56,850 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-11-17 12:28:56,851 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 281 transitions, 4249 flow [2023-11-17 12:28:56,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:56,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:56,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:56,857 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 12:28:57,051 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 12:28:57,051 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 12:28:57,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -819827343, now seen corresponding path program 12 times [2023-11-17 12:28:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:57,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559976104] [2023-11-17 12:28:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:57,164 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 12:28:57,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559976104] [2023-11-17 12:28:57,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559976104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331326436] [2023-11-17 12:28:57,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:28:57,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:57,169 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 12:28:57,169 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 12:28:57,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:28:57,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:57,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:28:57,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:57,298 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 12:28:57,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:57,459 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 12:28:57,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331326436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:57,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:57,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-17 12:28:57,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893657340] [2023-11-17 12:28:57,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:57,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:28:57,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:57,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:28:57,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:28:57,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:57,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 281 transitions, 4249 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 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 12:28:57,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:57,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:57,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:58,358 INFO L124 PetriNetUnfolderBase]: 998/1785 cut-off events. [2023-11-17 12:28:58,358 INFO L125 PetriNetUnfolderBase]: For 39659/39659 co-relation queries the response was YES. [2023-11-17 12:28:58,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14236 conditions, 1785 events. 998/1785 cut-off events. For 39659/39659 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10016 event pairs, 2 based on Foata normal form. 18/1803 useless extension candidates. Maximal degree in co-relation 13396. Up to 521 conditions per place. [2023-11-17 12:28:58,380 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 133 selfloop transitions, 330 changer transitions 30/493 dead transitions. [2023-11-17 12:28:58,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 493 transitions, 7926 flow [2023-11-17 12:28:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:28:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:28:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 261 transitions. [2023-11-17 12:28:58,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29524886877828055 [2023-11-17 12:28:58,382 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 261 transitions. [2023-11-17 12:28:58,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 261 transitions. [2023-11-17 12:28:58,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:58,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 261 transitions. [2023-11-17 12:28:58,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 7.676470588235294) internal successors, (261), 34 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:58,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 26.0) internal successors, (910), 35 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:58,385 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 26.0) internal successors, (910), 35 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:58,385 INFO L175 Difference]: Start difference. First operand has 174 places, 281 transitions, 4249 flow. Second operand 34 states and 261 transitions. [2023-11-17 12:28:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 493 transitions, 7926 flow [2023-11-17 12:28:58,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 493 transitions, 7781 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-11-17 12:28:58,493 INFO L231 Difference]: Finished difference. Result has 210 places, 387 transitions, 6825 flow [2023-11-17 12:28:58,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6825, PETRI_PLACES=210, PETRI_TRANSITIONS=387} [2023-11-17 12:28:58,494 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 190 predicate places. [2023-11-17 12:28:58,494 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 387 transitions, 6825 flow [2023-11-17 12:28:58,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 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 12:28:58,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:58,494 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:58,509 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 12:28:58,699 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 12:28:58,699 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 12:28:58,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:58,699 INFO L85 PathProgramCache]: Analyzing trace with hash -508534925, now seen corresponding path program 13 times [2023-11-17 12:28:58,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:58,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292571596] [2023-11-17 12:28:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:58,832 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 12:28:58,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:58,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292571596] [2023-11-17 12:28:58,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292571596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:58,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491600374] [2023-11-17 12:28:58,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:28:58,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:58,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:58,859 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 12:28:58,882 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 12:28:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:58,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:28:58,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:58,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:59,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491600374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:59,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:59,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-17 12:28:59,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16916637] [2023-11-17 12:28:59,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:59,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:28:59,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:28:59,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:28:59,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:59,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 387 transitions, 6825 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 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 12:28:59,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:59,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:59,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:59,855 INFO L124 PetriNetUnfolderBase]: 1194/2025 cut-off events. [2023-11-17 12:28:59,855 INFO L125 PetriNetUnfolderBase]: For 65620/65620 co-relation queries the response was YES. [2023-11-17 12:28:59,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19481 conditions, 2025 events. 1194/2025 cut-off events. For 65620/65620 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10929 event pairs, 32 based on Foata normal form. 36/2061 useless extension candidates. Maximal degree in co-relation 18805. Up to 929 conditions per place. [2023-11-17 12:28:59,873 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 156 selfloop transitions, 383 changer transitions 5/544 dead transitions. [2023-11-17 12:28:59,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 544 transitions, 10882 flow [2023-11-17 12:28:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:28:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:28:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 197 transitions. [2023-11-17 12:28:59,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28062678062678065 [2023-11-17 12:28:59,875 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 197 transitions. [2023-11-17 12:28:59,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 197 transitions. [2023-11-17 12:28:59,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:59,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 197 transitions. [2023-11-17 12:28:59,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.296296296296297) internal successors, (197), 27 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:59,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 26.0) internal successors, (728), 28 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:59,879 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 26.0) internal successors, (728), 28 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:59,879 INFO L175 Difference]: Start difference. First operand has 210 places, 387 transitions, 6825 flow. Second operand 27 states and 197 transitions. [2023-11-17 12:28:59,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 544 transitions, 10882 flow [2023-11-17 12:29:00,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 544 transitions, 10460 flow, removed 185 selfloop flow, removed 9 redundant places. [2023-11-17 12:29:00,091 INFO L231 Difference]: Finished difference. Result has 228 places, 497 transitions, 9920 flow [2023-11-17 12:29:00,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6499, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9920, PETRI_PLACES=228, PETRI_TRANSITIONS=497} [2023-11-17 12:29:00,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-11-17 12:29:00,092 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 497 transitions, 9920 flow [2023-11-17 12:29:00,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 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 12:29:00,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:00,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:00,109 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 12:29:00,298 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 12:29:00,298 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 12:29:00,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1513322261, now seen corresponding path program 14 times [2023-11-17 12:29:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:00,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055523251] [2023-11-17 12:29:00,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:00,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:00,412 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 12:29:00,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055523251] [2023-11-17 12:29:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055523251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783328166] [2023-11-17 12:29:00,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:29:00,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:00,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:00,429 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 12:29:00,430 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 12:29:00,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:29:00,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:00,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:29:00,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:00,578 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 12:29:00,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:00,735 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 12:29:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783328166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:00,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:00,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-17 12:29:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448199960] [2023-11-17 12:29:00,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:00,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:29:00,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:29:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:29:00,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:00,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 497 transitions, 9920 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:00,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:00,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:00,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:01,633 INFO L124 PetriNetUnfolderBase]: 1319/2264 cut-off events. [2023-11-17 12:29:01,634 INFO L125 PetriNetUnfolderBase]: For 86372/86372 co-relation queries the response was YES. [2023-11-17 12:29:01,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21810 conditions, 2264 events. 1319/2264 cut-off events. For 86372/86372 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12693 event pairs, 13 based on Foata normal form. 54/2318 useless extension candidates. Maximal degree in co-relation 20883. Up to 594 conditions per place. [2023-11-17 12:29:01,658 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 148 selfloop transitions, 460 changer transitions 15/623 dead transitions. [2023-11-17 12:29:01,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 623 transitions, 12659 flow [2023-11-17 12:29:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:29:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:29:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 249 transitions. [2023-11-17 12:29:01,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2902097902097902 [2023-11-17 12:29:01,666 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 249 transitions. [2023-11-17 12:29:01,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 249 transitions. [2023-11-17 12:29:01,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:01,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 249 transitions. [2023-11-17 12:29:01,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 7.545454545454546) internal successors, (249), 33 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:01,673 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 12:29:01,673 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 12:29:01,673 INFO L175 Difference]: Start difference. First operand has 228 places, 497 transitions, 9920 flow. Second operand 33 states and 249 transitions. [2023-11-17 12:29:01,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 623 transitions, 12659 flow [2023-11-17 12:29:02,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 623 transitions, 11754 flow, removed 413 selfloop flow, removed 7 redundant places. [2023-11-17 12:29:02,211 INFO L231 Difference]: Finished difference. Result has 262 places, 545 transitions, 11143 flow [2023-11-17 12:29:02,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8943, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11143, PETRI_PLACES=262, PETRI_TRANSITIONS=545} [2023-11-17 12:29:02,212 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 242 predicate places. [2023-11-17 12:29:02,212 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 545 transitions, 11143 flow [2023-11-17 12:29:02,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:02,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:02,213 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:02,221 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 12:29:02,421 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 12:29:02,422 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 12:29:02,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash 349150313, now seen corresponding path program 15 times [2023-11-17 12:29:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:02,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453876042] [2023-11-17 12:29:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:02,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:02,537 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 12:29:02,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:02,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453876042] [2023-11-17 12:29:02,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453876042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:02,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771325725] [2023-11-17 12:29:02,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:29:02,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:02,538 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 12:29:02,563 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 12:29:02,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:29:02,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:02,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:29:02,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:02,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:02,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771325725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:02,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:02,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-17 12:29:02,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60783166] [2023-11-17 12:29:02,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:02,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:29:02,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:29:02,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:29:02,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:02,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 545 transitions, 11143 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:02,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:02,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:02,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:03,600 INFO L124 PetriNetUnfolderBase]: 1329/2308 cut-off events. [2023-11-17 12:29:03,600 INFO L125 PetriNetUnfolderBase]: For 44662/44662 co-relation queries the response was YES. [2023-11-17 12:29:03,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21344 conditions, 2308 events. 1329/2308 cut-off events. For 44662/44662 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 13184 event pairs, 13 based on Foata normal form. 48/2356 useless extension candidates. Maximal degree in co-relation 20373. Up to 749 conditions per place. [2023-11-17 12:29:03,623 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 129 selfloop transitions, 491 changer transitions 5/625 dead transitions. [2023-11-17 12:29:03,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 625 transitions, 13187 flow [2023-11-17 12:29:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:29:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:29:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 265 transitions. [2023-11-17 12:29:03,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2831196581196581 [2023-11-17 12:29:03,626 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 265 transitions. [2023-11-17 12:29:03,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 265 transitions. [2023-11-17 12:29:03,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:03,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 265 transitions. [2023-11-17 12:29:03,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.361111111111111) internal successors, (265), 36 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:03,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 26.0) internal successors, (962), 37 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:03,629 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 26.0) internal successors, (962), 37 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:03,629 INFO L175 Difference]: Start difference. First operand has 262 places, 545 transitions, 11143 flow. Second operand 36 states and 265 transitions. [2023-11-17 12:29:03,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 625 transitions, 13187 flow [2023-11-17 12:29:03,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 625 transitions, 12346 flow, removed 103 selfloop flow, removed 22 redundant places. [2023-11-17 12:29:03,903 INFO L231 Difference]: Finished difference. Result has 276 places, 562 transitions, 11885 flow [2023-11-17 12:29:03,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=10163, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11885, PETRI_PLACES=276, PETRI_TRANSITIONS=562} [2023-11-17 12:29:03,904 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-11-17 12:29:03,904 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 562 transitions, 11885 flow [2023-11-17 12:29:03,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:03,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:03,904 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:03,909 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 12:29:04,109 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 12:29:04,110 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 12:29:04,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:04,110 INFO L85 PathProgramCache]: Analyzing trace with hash -159338349, now seen corresponding path program 16 times [2023-11-17 12:29:04,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:04,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336482437] [2023-11-17 12:29:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:04,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:04,227 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 12:29:04,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336482437] [2023-11-17 12:29:04,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336482437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418107518] [2023-11-17 12:29:04,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:29:04,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:04,245 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 12:29:04,273 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 12:29:04,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:29:04,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:04,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:29:04,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:04,447 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 12:29:04,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:04,539 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 12:29:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418107518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:04,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:04,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 12:29:04,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546590310] [2023-11-17 12:29:04,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:04,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:29:04,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:04,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:29:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:29:04,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:04,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 562 transitions, 11885 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:04,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:04,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:04,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:05,490 INFO L124 PetriNetUnfolderBase]: 1511/2638 cut-off events. [2023-11-17 12:29:05,490 INFO L125 PetriNetUnfolderBase]: For 44402/44402 co-relation queries the response was YES. [2023-11-17 12:29:05,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24905 conditions, 2638 events. 1511/2638 cut-off events. For 44402/44402 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15500 event pairs, 19 based on Foata normal form. 10/2648 useless extension candidates. Maximal degree in co-relation 23974. Up to 780 conditions per place. [2023-11-17 12:29:05,514 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 326 selfloop transitions, 429 changer transitions 0/755 dead transitions. [2023-11-17 12:29:05,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 755 transitions, 16393 flow [2023-11-17 12:29:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:29:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:29:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 262 transitions. [2023-11-17 12:29:05,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2799145299145299 [2023-11-17 12:29:05,526 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 262 transitions. [2023-11-17 12:29:05,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 262 transitions. [2023-11-17 12:29:05,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:05,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 262 transitions. [2023-11-17 12:29:05,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.277777777777778) internal successors, (262), 36 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 26.0) internal successors, (962), 37 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,528 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 26.0) internal successors, (962), 37 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,528 INFO L175 Difference]: Start difference. First operand has 276 places, 562 transitions, 11885 flow. Second operand 36 states and 262 transitions. [2023-11-17 12:29:05,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 755 transitions, 16393 flow [2023-11-17 12:29:05,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 755 transitions, 15744 flow, removed 89 selfloop flow, removed 24 redundant places. [2023-11-17 12:29:05,974 INFO L231 Difference]: Finished difference. Result has 293 places, 670 transitions, 14945 flow [2023-11-17 12:29:05,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=11316, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14945, PETRI_PLACES=293, PETRI_TRANSITIONS=670} [2023-11-17 12:29:05,975 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 273 predicate places. [2023-11-17 12:29:05,975 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 670 transitions, 14945 flow [2023-11-17 12:29:05,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:05,975 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:05,982 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 12:29:06,181 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 12:29:06,182 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 12:29:06,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1574645079, now seen corresponding path program 17 times [2023-11-17 12:29:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:06,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612856842] [2023-11-17 12:29:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:06,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:06,295 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 12:29:06,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612856842] [2023-11-17 12:29:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612856842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522913151] [2023-11-17 12:29:06,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:29:06,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:06,297 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 12:29:06,299 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 12:29:06,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:29:06,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:06,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:29:06,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:06,453 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 12:29:06,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:06,585 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 12:29:06,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522913151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:06,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:06,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:29:06,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706802944] [2023-11-17 12:29:06,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:29:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:29:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:29:06,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:06,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 670 transitions, 14945 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:06,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:06,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:07,853 INFO L124 PetriNetUnfolderBase]: 1940/3373 cut-off events. [2023-11-17 12:29:07,853 INFO L125 PetriNetUnfolderBase]: For 60310/60310 co-relation queries the response was YES. [2023-11-17 12:29:07,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33254 conditions, 3373 events. 1940/3373 cut-off events. For 60310/60310 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 20828 event pairs, 15 based on Foata normal form. 36/3409 useless extension candidates. Maximal degree in co-relation 32144. Up to 983 conditions per place. [2023-11-17 12:29:07,881 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 195 selfloop transitions, 729 changer transitions 12/936 dead transitions. [2023-11-17 12:29:07,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 936 transitions, 21697 flow [2023-11-17 12:29:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:29:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:29:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 261 transitions. [2023-11-17 12:29:07,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27884615384615385 [2023-11-17 12:29:07,883 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 261 transitions. [2023-11-17 12:29:07,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 261 transitions. [2023-11-17 12:29:07,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:07,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 261 transitions. [2023-11-17 12:29:07,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.25) internal successors, (261), 36 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:07,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 26.0) internal successors, (962), 37 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:07,884 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 26.0) internal successors, (962), 37 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:07,884 INFO L175 Difference]: Start difference. First operand has 293 places, 670 transitions, 14945 flow. Second operand 36 states and 261 transitions. [2023-11-17 12:29:07,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 936 transitions, 21697 flow [2023-11-17 12:29:08,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 936 transitions, 21242 flow, removed 125 selfloop flow, removed 16 redundant places. [2023-11-17 12:29:08,511 INFO L231 Difference]: Finished difference. Result has 323 places, 859 transitions, 20900 flow [2023-11-17 12:29:08,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=14552, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=20900, PETRI_PLACES=323, PETRI_TRANSITIONS=859} [2023-11-17 12:29:08,512 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 303 predicate places. [2023-11-17 12:29:08,512 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 859 transitions, 20900 flow [2023-11-17 12:29:08,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:08,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:08,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:08,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:08,716 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 12:29:08,716 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 12:29:08,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash -757878057, now seen corresponding path program 18 times [2023-11-17 12:29:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:08,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583882269] [2023-11-17 12:29:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:08,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:08,892 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 12:29:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583882269] [2023-11-17 12:29:08,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583882269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68430945] [2023-11-17 12:29:08,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:29:08,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:08,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:08,894 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 12:29:08,915 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 12:29:08,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:29:08,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:08,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:29:08,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:09,062 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 12:29:09,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:09,206 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 12:29:09,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68430945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:09,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:09,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:29:09,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209174246] [2023-11-17 12:29:09,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:29:09,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:29:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:29:09,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:09,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 859 transitions, 20900 flow. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:09,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:09,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:09,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:10,726 INFO L124 PetriNetUnfolderBase]: 2117/3694 cut-off events. [2023-11-17 12:29:10,726 INFO L125 PetriNetUnfolderBase]: For 73125/73125 co-relation queries the response was YES. [2023-11-17 12:29:10,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39297 conditions, 3694 events. 2117/3694 cut-off events. For 73125/73125 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23339 event pairs, 29 based on Foata normal form. 10/3704 useless extension candidates. Maximal degree in co-relation 38132. Up to 1242 conditions per place. [2023-11-17 12:29:10,758 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 324 selfloop transitions, 696 changer transitions 0/1020 dead transitions. [2023-11-17 12:29:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1020 transitions, 25534 flow [2023-11-17 12:29:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 12:29:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 12:29:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 269 transitions. [2023-11-17 12:29:10,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2796257796257796 [2023-11-17 12:29:10,760 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 269 transitions. [2023-11-17 12:29:10,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 269 transitions. [2023-11-17 12:29:10,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:10,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 269 transitions. [2023-11-17 12:29:10,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 7.27027027027027) internal successors, (269), 37 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:10,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 26.0) internal successors, (988), 38 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:10,762 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 26.0) internal successors, (988), 38 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:10,762 INFO L175 Difference]: Start difference. First operand has 323 places, 859 transitions, 20900 flow. Second operand 37 states and 269 transitions. [2023-11-17 12:29:10,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1020 transitions, 25534 flow [2023-11-17 12:29:11,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1020 transitions, 24907 flow, removed 229 selfloop flow, removed 15 redundant places. [2023-11-17 12:29:11,555 INFO L231 Difference]: Finished difference. Result has 350 places, 946 transitions, 24375 flow [2023-11-17 12:29:11,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=20353, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24375, PETRI_PLACES=350, PETRI_TRANSITIONS=946} [2023-11-17 12:29:11,556 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 330 predicate places. [2023-11-17 12:29:11,556 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 946 transitions, 24375 flow [2023-11-17 12:29:11,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:11,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:11,556 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:11,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 12:29:11,761 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 12:29:11,761 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 12:29:11,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:11,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1814871025, now seen corresponding path program 19 times [2023-11-17 12:29:11,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:11,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050527620] [2023-11-17 12:29:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:11,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:11,859 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 12:29:11,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:11,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050527620] [2023-11-17 12:29:11,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050527620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:11,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061424626] [2023-11-17 12:29:11,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:29:11,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:11,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:11,860 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 12:29:11,863 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 12:29:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:11,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:29:11,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:12,017 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 12:29:12,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:12,198 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 12:29:12,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061424626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:12,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:12,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 12:29:12,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333791414] [2023-11-17 12:29:12,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:12,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:29:12,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:29:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:29:12,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:12,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 946 transitions, 24375 flow. Second operand has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 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 12:29:12,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:12,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:12,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:14,290 INFO L124 PetriNetUnfolderBase]: 2898/5075 cut-off events. [2023-11-17 12:29:14,290 INFO L125 PetriNetUnfolderBase]: For 113032/113032 co-relation queries the response was YES. [2023-11-17 12:29:14,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55848 conditions, 5075 events. 2898/5075 cut-off events. For 113032/113032 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34254 event pairs, 41 based on Foata normal form. 38/5113 useless extension candidates. Maximal degree in co-relation 54606. Up to 1363 conditions per place. [2023-11-17 12:29:14,422 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 462 selfloop transitions, 896 changer transitions 14/1372 dead transitions. [2023-11-17 12:29:14,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1372 transitions, 36676 flow [2023-11-17 12:29:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-17 12:29:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-17 12:29:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 310 transitions. [2023-11-17 12:29:14,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2772808586762075 [2023-11-17 12:29:14,423 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 310 transitions. [2023-11-17 12:29:14,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 310 transitions. [2023-11-17 12:29:14,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:14,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 310 transitions. [2023-11-17 12:29:14,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 7.209302325581396) internal successors, (310), 43 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:14,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 26.0) internal successors, (1144), 44 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:14,426 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 26.0) internal successors, (1144), 44 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:14,426 INFO L175 Difference]: Start difference. First operand has 350 places, 946 transitions, 24375 flow. Second operand 43 states and 310 transitions. [2023-11-17 12:29:14,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1372 transitions, 36676 flow [2023-11-17 12:29:15,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1372 transitions, 36296 flow, removed 133 selfloop flow, removed 10 redundant places. [2023-11-17 12:29:15,794 INFO L231 Difference]: Finished difference. Result has 394 places, 1280 transitions, 35856 flow [2023-11-17 12:29:15,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=24021, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=35856, PETRI_PLACES=394, PETRI_TRANSITIONS=1280} [2023-11-17 12:29:15,795 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 374 predicate places. [2023-11-17 12:29:15,795 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1280 transitions, 35856 flow [2023-11-17 12:29:15,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 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 12:29:15,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:15,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:15,803 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 12:29:16,000 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 12:29:16,001 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 12:29:16,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:16,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1227479859, now seen corresponding path program 20 times [2023-11-17 12:29:16,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:16,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791767081] [2023-11-17 12:29:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:16,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:16,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:16,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791767081] [2023-11-17 12:29:16,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791767081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:16,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275440889] [2023-11-17 12:29:16,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:29:16,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:16,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:16,114 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 12:29:16,116 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 12:29:16,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:29:16,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:16,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:29:16,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:16,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:16,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275440889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:16,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:16,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-17 12:29:16,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2587345] [2023-11-17 12:29:16,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:16,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:29:16,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:16,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:29:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:29:16,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:16,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1280 transitions, 35856 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 12:29:16,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:16,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:16,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:18,738 INFO L124 PetriNetUnfolderBase]: 3094/5429 cut-off events. [2023-11-17 12:29:18,738 INFO L125 PetriNetUnfolderBase]: For 150980/150980 co-relation queries the response was YES. [2023-11-17 12:29:18,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64234 conditions, 5429 events. 3094/5429 cut-off events. For 150980/150980 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 37051 event pairs, 127 based on Foata normal form. 72/5501 useless extension candidates. Maximal degree in co-relation 62740. Up to 4735 conditions per place. [2023-11-17 12:29:18,791 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 1233 selfloop transitions, 208 changer transitions 14/1455 dead transitions. [2023-11-17 12:29:18,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1455 transitions, 42476 flow [2023-11-17 12:29:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:29:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:29:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 234 transitions. [2023-11-17 12:29:18,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2023-11-17 12:29:18,792 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 234 transitions. [2023-11-17 12:29:18,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 234 transitions. [2023-11-17 12:29:18,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:18,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 234 transitions. [2023-11-17 12:29:18,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.548387096774194) internal successors, (234), 31 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:18,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 26.0) internal successors, (832), 32 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:18,794 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 26.0) internal successors, (832), 32 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:18,794 INFO L175 Difference]: Start difference. First operand has 394 places, 1280 transitions, 35856 flow. Second operand 31 states and 234 transitions. [2023-11-17 12:29:18,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1455 transitions, 42476 flow [2023-11-17 12:29:20,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1455 transitions, 41921 flow, removed 187 selfloop flow, removed 19 redundant places. [2023-11-17 12:29:20,863 INFO L231 Difference]: Finished difference. Result has 416 places, 1377 transitions, 38895 flow [2023-11-17 12:29:20,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=35303, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=38895, PETRI_PLACES=416, PETRI_TRANSITIONS=1377} [2023-11-17 12:29:20,864 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 396 predicate places. [2023-11-17 12:29:20,864 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1377 transitions, 38895 flow [2023-11-17 12:29:20,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 12:29:20,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:20,865 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:20,887 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 12:29:21,070 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 12:29:21,071 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 12:29:21,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1736220125, now seen corresponding path program 21 times [2023-11-17 12:29:21,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:21,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123836849] [2023-11-17 12:29:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:21,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:21,210 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 12:29:21,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123836849] [2023-11-17 12:29:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123836849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975930773] [2023-11-17 12:29:21,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:29:21,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:21,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:21,212 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 12:29:21,247 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 12:29:21,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:29:21,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:21,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:29:21,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:21,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:21,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975930773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:21,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:21,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-17 12:29:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088315856] [2023-11-17 12:29:21,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:21,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:29:21,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:29:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:29:21,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:21,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1377 transitions, 38895 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:21,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:21,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:21,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:24,077 INFO L124 PetriNetUnfolderBase]: 3138/5455 cut-off events. [2023-11-17 12:29:24,077 INFO L125 PetriNetUnfolderBase]: For 151813/151813 co-relation queries the response was YES. [2023-11-17 12:29:24,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65657 conditions, 5455 events. 3138/5455 cut-off events. For 151813/151813 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36938 event pairs, 127 based on Foata normal form. 32/5487 useless extension candidates. Maximal degree in co-relation 64146. Up to 4844 conditions per place. [2023-11-17 12:29:24,141 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 1213 selfloop transitions, 231 changer transitions 4/1448 dead transitions. [2023-11-17 12:29:24,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1448 transitions, 43307 flow [2023-11-17 12:29:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:29:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:29:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 171 transitions. [2023-11-17 12:29:24,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27403846153846156 [2023-11-17 12:29:24,142 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 171 transitions. [2023-11-17 12:29:24,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 171 transitions. [2023-11-17 12:29:24,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:24,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 171 transitions. [2023-11-17 12:29:24,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.125) internal successors, (171), 24 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:24,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 26.0) internal successors, (650), 25 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:24,144 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 26.0) internal successors, (650), 25 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:24,144 INFO L175 Difference]: Start difference. First operand has 416 places, 1377 transitions, 38895 flow. Second operand 24 states and 171 transitions. [2023-11-17 12:29:24,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1448 transitions, 43307 flow [2023-11-17 12:29:26,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1448 transitions, 42693 flow, removed 254 selfloop flow, removed 15 redundant places. [2023-11-17 12:29:26,802 INFO L231 Difference]: Finished difference. Result has 433 places, 1409 transitions, 40127 flow [2023-11-17 12:29:26,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=37998, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=40127, PETRI_PLACES=433, PETRI_TRANSITIONS=1409} [2023-11-17 12:29:26,803 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 413 predicate places. [2023-11-17 12:29:26,803 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1409 transitions, 40127 flow [2023-11-17 12:29:26,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:26,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:26,804 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:26,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-17 12:29:27,008 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 12:29:27,008 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 12:29:27,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:27,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1396394634, now seen corresponding path program 22 times [2023-11-17 12:29:27,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:27,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691690190] [2023-11-17 12:29:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:27,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:27,083 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 12:29:27,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:27,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691690190] [2023-11-17 12:29:27,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691690190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:27,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160385346] [2023-11-17 12:29:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:29:27,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:27,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:27,103 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 12:29:27,105 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 12:29:27,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:29:27,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:27,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:29:27,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:27,191 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 12:29:27,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:27,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160385346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:27,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:27,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 10 [2023-11-17 12:29:27,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212719977] [2023-11-17 12:29:27,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:27,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:29:27,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:29:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:29:27,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:27,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1409 transitions, 40127 flow. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 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 12:29:27,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:27,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:27,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:30,488 INFO L124 PetriNetUnfolderBase]: 4212/7296 cut-off events. [2023-11-17 12:29:30,488 INFO L125 PetriNetUnfolderBase]: For 196898/196898 co-relation queries the response was YES. [2023-11-17 12:29:30,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88531 conditions, 7296 events. 4212/7296 cut-off events. For 196898/196898 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 51909 event pairs, 134 based on Foata normal form. 1/7297 useless extension candidates. Maximal degree in co-relation 87932. Up to 4100 conditions per place. [2023-11-17 12:29:30,567 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 1270 selfloop transitions, 593 changer transitions 95/1958 dead transitions. [2023-11-17 12:29:30,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1958 transitions, 58968 flow [2023-11-17 12:29:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:29:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:29:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2023-11-17 12:29:30,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2023-11-17 12:29:30,568 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 88 transitions. [2023-11-17 12:29:30,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 88 transitions. [2023-11-17 12:29:30,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:30,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 88 transitions. [2023-11-17 12:29:30,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:30,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:30,568 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:30,568 INFO L175 Difference]: Start difference. First operand has 433 places, 1409 transitions, 40127 flow. Second operand 7 states and 88 transitions. [2023-11-17 12:29:30,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1958 transitions, 58968 flow [2023-11-17 12:29:33,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1958 transitions, 58392 flow, removed 235 selfloop flow, removed 9 redundant places. [2023-11-17 12:29:33,954 INFO L231 Difference]: Finished difference. Result has 433 places, 1680 transitions, 49611 flow [2023-11-17 12:29:33,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=39758, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=49611, PETRI_PLACES=433, PETRI_TRANSITIONS=1680} [2023-11-17 12:29:33,955 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 413 predicate places. [2023-11-17 12:29:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1680 transitions, 49611 flow [2023-11-17 12:29:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 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 12:29:33,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:33,955 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:33,965 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 12:29:34,159 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 12:29:34,159 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 12:29:34,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:34,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1722892302, now seen corresponding path program 23 times [2023-11-17 12:29:34,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:34,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104480745] [2023-11-17 12:29:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:34,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:34,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:34,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104480745] [2023-11-17 12:29:34,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104480745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:34,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852399269] [2023-11-17 12:29:34,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:29:34,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:34,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:34,264 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 12:29:34,267 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 12:29:34,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:29:34,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:34,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:29:34,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:34,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:34,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852399269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:34,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:34,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-11-17 12:29:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864470568] [2023-11-17 12:29:34,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:29:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:29:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:29:34,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:34,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1680 transitions, 49611 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:34,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:34,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:34,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:38,104 INFO L124 PetriNetUnfolderBase]: 4227/7397 cut-off events. [2023-11-17 12:29:38,104 INFO L125 PetriNetUnfolderBase]: For 233223/233223 co-relation queries the response was YES. [2023-11-17 12:29:38,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94396 conditions, 7397 events. 4227/7397 cut-off events. For 233223/233223 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 53427 event pairs, 181 based on Foata normal form. 50/7447 useless extension candidates. Maximal degree in co-relation 93807. Up to 5766 conditions per place. [2023-11-17 12:29:38,203 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 1418 selfloop transitions, 418 changer transitions 20/1856 dead transitions. [2023-11-17 12:29:38,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1856 transitions, 57340 flow [2023-11-17 12:29:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:29:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:29:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 230 transitions. [2023-11-17 12:29:38,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34023668639053256 [2023-11-17 12:29:38,204 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 230 transitions. [2023-11-17 12:29:38,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 230 transitions. [2023-11-17 12:29:38,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:38,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 230 transitions. [2023-11-17 12:29:38,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 8.846153846153847) internal successors, (230), 26 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:38,207 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 12:29:38,207 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 12:29:38,208 INFO L175 Difference]: Start difference. First operand has 433 places, 1680 transitions, 49611 flow. Second operand 26 states and 230 transitions. [2023-11-17 12:29:38,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1856 transitions, 57340 flow [2023-11-17 12:29:41,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1856 transitions, 57009 flow, removed 148 selfloop flow, removed 2 redundant places. [2023-11-17 12:29:41,670 INFO L231 Difference]: Finished difference. Result has 466 places, 1753 transitions, 53007 flow [2023-11-17 12:29:41,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=49292, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=53007, PETRI_PLACES=466, PETRI_TRANSITIONS=1753} [2023-11-17 12:29:41,671 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 446 predicate places. [2023-11-17 12:29:41,672 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1753 transitions, 53007 flow [2023-11-17 12:29:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:41,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:41,672 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:41,678 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 12:29:41,876 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 12:29:41,876 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 12:29:41,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1438561918, now seen corresponding path program 24 times [2023-11-17 12:29:41,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:41,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173955300] [2023-11-17 12:29:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:41,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:41,979 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 12:29:41,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173955300] [2023-11-17 12:29:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173955300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096030246] [2023-11-17 12:29:41,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:29:41,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:41,981 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 12:29:42,004 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 12:29:42,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:29:42,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:42,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:29:42,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:42,141 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 12:29:42,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:42,307 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 12:29:42,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096030246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:42,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:42,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-11-17 12:29:42,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280845545] [2023-11-17 12:29:42,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:42,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:29:42,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:29:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:29:42,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:42,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1753 transitions, 53007 flow. Second operand has 26 states, 26 states have (on average 4.615384615384615) internal successors, (120), 26 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:42,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:42,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:42,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:47,809 INFO L124 PetriNetUnfolderBase]: 4764/8410 cut-off events. [2023-11-17 12:29:47,809 INFO L125 PetriNetUnfolderBase]: For 308582/308582 co-relation queries the response was YES. [2023-11-17 12:29:47,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108679 conditions, 8410 events. 4764/8410 cut-off events. For 308582/308582 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 62419 event pairs, 22 based on Foata normal form. 108/8518 useless extension candidates. Maximal degree in co-relation 108090. Up to 2309 conditions per place. [2023-11-17 12:29:47,926 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 491 selfloop transitions, 1593 changer transitions 62/2146 dead transitions. [2023-11-17 12:29:47,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 2146 transitions, 67487 flow [2023-11-17 12:29:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-17 12:29:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-17 12:29:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 384 transitions. [2023-11-17 12:29:47,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27866473149492016 [2023-11-17 12:29:47,928 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 384 transitions. [2023-11-17 12:29:47,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 384 transitions. [2023-11-17 12:29:47,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:47,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 384 transitions. [2023-11-17 12:29:47,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 7.245283018867925) internal successors, (384), 53 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:47,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 26.0) internal successors, (1404), 54 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:47,930 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 26.0) internal successors, (1404), 54 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:47,930 INFO L175 Difference]: Start difference. First operand has 466 places, 1753 transitions, 53007 flow. Second operand 53 states and 384 transitions. [2023-11-17 12:29:47,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 2146 transitions, 67487 flow [2023-11-17 12:29:52,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 2146 transitions, 65455 flow, removed 314 selfloop flow, removed 12 redundant places. [2023-11-17 12:29:52,350 INFO L231 Difference]: Finished difference. Result has 514 places, 1972 transitions, 62967 flow [2023-11-17 12:29:52,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=51264, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=62967, PETRI_PLACES=514, PETRI_TRANSITIONS=1972} [2023-11-17 12:29:52,351 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 494 predicate places. [2023-11-17 12:29:52,351 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1972 transitions, 62967 flow [2023-11-17 12:29:52,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.615384615384615) internal successors, (120), 26 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:52,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:52,351 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:52,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-17 12:29:52,556 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 12:29:52,556 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 12:29:52,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:52,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1159309790, now seen corresponding path program 25 times [2023-11-17 12:29:52,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:52,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506872612] [2023-11-17 12:29:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:52,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:52,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:52,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506872612] [2023-11-17 12:29:52,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506872612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:52,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364860808] [2023-11-17 12:29:52,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:29:52,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:52,660 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 12:29:52,685 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 12:29:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:52,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:29:52,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:52,829 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 12:29:52,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:52,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364860808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:52,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:52,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2023-11-17 12:29:52,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323688083] [2023-11-17 12:29:52,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:52,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:29:52,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:52,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:29:52,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:29:52,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:29:52,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1972 transitions, 62967 flow. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:52,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:52,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:29:52,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:58,660 INFO L124 PetriNetUnfolderBase]: 5000/8869 cut-off events. [2023-11-17 12:29:58,660 INFO L125 PetriNetUnfolderBase]: For 356081/356081 co-relation queries the response was YES. [2023-11-17 12:29:58,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119296 conditions, 8869 events. 5000/8869 cut-off events. For 356081/356081 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 66591 event pairs, 177 based on Foata normal form. 116/8985 useless extension candidates. Maximal degree in co-relation 118899. Up to 7441 conditions per place. [2023-11-17 12:29:58,786 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 1748 selfloop transitions, 418 changer transitions 12/2178 dead transitions. [2023-11-17 12:29:58,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 2178 transitions, 73392 flow [2023-11-17 12:29:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:29:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:29:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 163 transitions. [2023-11-17 12:29:58,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29853479853479853 [2023-11-17 12:29:58,787 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 163 transitions. [2023-11-17 12:29:58,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 163 transitions. [2023-11-17 12:29:58,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:58,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 163 transitions. [2023-11-17 12:29:58,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:58,788 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 12:29:58,789 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 12:29:58,789 INFO L175 Difference]: Start difference. First operand has 514 places, 1972 transitions, 62967 flow. Second operand 21 states and 163 transitions. [2023-11-17 12:29:58,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 2178 transitions, 73392 flow [2023-11-17 12:30:05,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 2178 transitions, 70819 flow, removed 780 selfloop flow, removed 25 redundant places. [2023-11-17 12:30:05,144 INFO L231 Difference]: Finished difference. Result has 514 places, 2108 transitions, 66795 flow [2023-11-17 12:30:05,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=60362, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=66795, PETRI_PLACES=514, PETRI_TRANSITIONS=2108} [2023-11-17 12:30:05,146 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 494 predicate places. [2023-11-17 12:30:05,146 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 2108 transitions, 66795 flow [2023-11-17 12:30:05,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:05,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:30:05,146 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:30:05,151 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 12:30:05,351 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 12:30:05,351 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 12:30:05,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:30:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash -995200418, now seen corresponding path program 26 times [2023-11-17 12:30:05,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:30:05,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525937389] [2023-11-17 12:30:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:30:05,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:30:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:05,470 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 12:30:05,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:30:05,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525937389] [2023-11-17 12:30:05,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525937389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:30:05,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008970783] [2023-11-17 12:30:05,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:30:05,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:30:05,471 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 12:30:05,501 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 12:30:05,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:30:05,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:30:05,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:30:05,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:30:05,671 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 12:30:05,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:30:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:05,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008970783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:30:05,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:30:05,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-17 12:30:05,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156130850] [2023-11-17 12:30:05,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:30:05,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:30:05,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:30:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:30:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:30:05,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:30:05,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 2108 transitions, 66795 flow. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:05,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:30:05,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:30:05,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:30:12,208 INFO L124 PetriNetUnfolderBase]: 5185/9212 cut-off events. [2023-11-17 12:30:12,208 INFO L125 PetriNetUnfolderBase]: For 320818/320818 co-relation queries the response was YES. [2023-11-17 12:30:12,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122401 conditions, 9212 events. 5185/9212 cut-off events. For 320818/320818 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 69666 event pairs, 183 based on Foata normal form. 36/9248 useless extension candidates. Maximal degree in co-relation 120536. Up to 7351 conditions per place. [2023-11-17 12:30:12,324 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 1737 selfloop transitions, 501 changer transitions 16/2254 dead transitions. [2023-11-17 12:30:12,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 2254 transitions, 75087 flow [2023-11-17 12:30:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:30:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:30:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 201 transitions. [2023-11-17 12:30:12,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2863247863247863 [2023-11-17 12:30:12,325 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 201 transitions. [2023-11-17 12:30:12,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 201 transitions. [2023-11-17 12:30:12,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:30:12,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 201 transitions. [2023-11-17 12:30:12,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.444444444444445) internal successors, (201), 27 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:12,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 26.0) internal successors, (728), 28 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:12,326 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 26.0) internal successors, (728), 28 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:12,326 INFO L175 Difference]: Start difference. First operand has 514 places, 2108 transitions, 66795 flow. Second operand 27 states and 201 transitions. [2023-11-17 12:30:12,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 2254 transitions, 75087 flow [2023-11-17 12:30:17,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 2254 transitions, 74561 flow, removed 250 selfloop flow, removed 6 redundant places. [2023-11-17 12:30:17,917 INFO L231 Difference]: Finished difference. Result has 539 places, 2178 transitions, 70185 flow [2023-11-17 12:30:17,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66367, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=70185, PETRI_PLACES=539, PETRI_TRANSITIONS=2178} [2023-11-17 12:30:17,918 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 519 predicate places. [2023-11-17 12:30:17,918 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 2178 transitions, 70185 flow [2023-11-17 12:30:17,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:17,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:30:17,919 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:30:17,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-17 12:30:18,122 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 12:30:18,123 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 12:30:18,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:30:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1647842726, now seen corresponding path program 27 times [2023-11-17 12:30:18,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:30:18,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915893336] [2023-11-17 12:30:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:30:18,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:30:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:18,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:30:18,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915893336] [2023-11-17 12:30:18,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915893336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:30:18,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729287224] [2023-11-17 12:30:18,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:30:18,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:18,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:30:18,279 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 12:30:18,304 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 12:30:18,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:30:18,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:30:18,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:30:18,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:30:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:18,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:30:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729287224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:30:18,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:30:18,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-11-17 12:30:18,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180000163] [2023-11-17 12:30:18,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:30:18,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:30:18,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:30:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:30:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:30:18,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:30:18,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 2178 transitions, 70185 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:18,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:30:18,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:30:18,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:30:27,535 INFO L124 PetriNetUnfolderBase]: 6389/11456 cut-off events. [2023-11-17 12:30:27,535 INFO L125 PetriNetUnfolderBase]: For 419878/419878 co-relation queries the response was YES. [2023-11-17 12:30:27,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152942 conditions, 11456 events. 6389/11456 cut-off events. For 419878/419878 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 90368 event pairs, 47 based on Foata normal form. 28/11484 useless extension candidates. Maximal degree in co-relation 151582. Up to 3634 conditions per place. [2023-11-17 12:30:27,678 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 538 selfloop transitions, 2580 changer transitions 50/3168 dead transitions. [2023-11-17 12:30:27,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 3168 transitions, 104610 flow [2023-11-17 12:30:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-17 12:30:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-11-17 12:30:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 544 transitions. [2023-11-17 12:30:27,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27530364372469635 [2023-11-17 12:30:27,680 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 544 transitions. [2023-11-17 12:30:27,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 544 transitions. [2023-11-17 12:30:27,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:30:27,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 544 transitions. [2023-11-17 12:30:27,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 7.157894736842105) internal successors, (544), 76 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:27,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 26.0) internal successors, (2002), 77 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:27,682 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 26.0) internal successors, (2002), 77 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:27,683 INFO L175 Difference]: Start difference. First operand has 539 places, 2178 transitions, 70185 flow. Second operand 76 states and 544 transitions. [2023-11-17 12:30:27,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 3168 transitions, 104610 flow [2023-11-17 12:30:35,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 3168 transitions, 103627 flow, removed 351 selfloop flow, removed 13 redundant places. [2023-11-17 12:30:35,825 INFO L231 Difference]: Finished difference. Result has 613 places, 2919 transitions, 101566 flow [2023-11-17 12:30:35,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=69360, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1840, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=101566, PETRI_PLACES=613, PETRI_TRANSITIONS=2919} [2023-11-17 12:30:35,827 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 593 predicate places. [2023-11-17 12:30:35,827 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 2919 transitions, 101566 flow [2023-11-17 12:30:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:35,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:30:35,827 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:30:35,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-17 12:30:36,032 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 12:30:36,032 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 12:30:36,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:30:36,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2075326808, now seen corresponding path program 28 times [2023-11-17 12:30:36,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:30:36,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272448728] [2023-11-17 12:30:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:30:36,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:30:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:36,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:30:36,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272448728] [2023-11-17 12:30:36,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272448728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:30:36,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73188760] [2023-11-17 12:30:36,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:30:36,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:36,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:30:36,162 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 12:30:36,170 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 12:30:36,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:30:36,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:30:36,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:30:36,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:30:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:36,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:30:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:36,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73188760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:30:36,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:30:36,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-11-17 12:30:36,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483635794] [2023-11-17 12:30:36,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:30:36,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:30:36,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:30:36,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:30:36,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:30:36,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:30:36,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 2919 transitions, 101566 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:36,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:30:36,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:30:36,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:30:46,601 INFO L124 PetriNetUnfolderBase]: 7132/12546 cut-off events. [2023-11-17 12:30:46,601 INFO L125 PetriNetUnfolderBase]: For 488214/488214 co-relation queries the response was YES. [2023-11-17 12:30:46,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180245 conditions, 12546 events. 7132/12546 cut-off events. For 488214/488214 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 98129 event pairs, 141 based on Foata normal form. 29/12575 useless extension candidates. Maximal degree in co-relation 179184. Up to 4332 conditions per place. [2023-11-17 12:30:46,880 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1365 selfloop transitions, 2116 changer transitions 6/3487 dead transitions. [2023-11-17 12:30:46,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 3487 transitions, 125207 flow [2023-11-17 12:30:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-17 12:30:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-17 12:30:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 407 transitions. [2023-11-17 12:30:46,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27462887989203777 [2023-11-17 12:30:46,881 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 407 transitions. [2023-11-17 12:30:46,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 407 transitions. [2023-11-17 12:30:46,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:30:46,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 407 transitions. [2023-11-17 12:30:46,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 7.140350877192983) internal successors, (407), 57 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:46,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 26.0) internal successors, (1508), 58 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:46,884 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 26.0) internal successors, (1508), 58 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:46,884 INFO L175 Difference]: Start difference. First operand has 613 places, 2919 transitions, 101566 flow. Second operand 57 states and 407 transitions. [2023-11-17 12:30:46,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 3487 transitions, 125207 flow [2023-11-17 12:30:58,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 656 places, 3487 transitions, 120826 flow, removed 1637 selfloop flow, removed 11 redundant places. [2023-11-17 12:30:58,698 INFO L231 Difference]: Finished difference. Result has 668 places, 3321 transitions, 118561 flow [2023-11-17 12:30:58,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=98176, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=118561, PETRI_PLACES=668, PETRI_TRANSITIONS=3321} [2023-11-17 12:30:58,701 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 648 predicate places. [2023-11-17 12:30:58,701 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 3321 transitions, 118561 flow [2023-11-17 12:30:58,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:58,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:30:58,701 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:30:58,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 12:30:58,905 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 12:30:58,906 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 12:30:58,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:30:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash -666466950, now seen corresponding path program 29 times [2023-11-17 12:30:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:30:58,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392506658] [2023-11-17 12:30:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:30:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:30:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:59,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:30:59,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392506658] [2023-11-17 12:30:59,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392506658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:30:59,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023557302] [2023-11-17 12:30:59,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:30:59,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:59,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:30:59,035 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 12:30:59,045 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 12:30:59,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:30:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:30:59,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:30:59,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:30:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:59,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:30:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:59,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023557302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:30:59,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:30:59,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-17 12:30:59,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092595192] [2023-11-17 12:30:59,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:30:59,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:30:59,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:30:59,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:30:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:30:59,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:30:59,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 3321 transitions, 118561 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:59,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:30:59,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:30:59,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:12,932 INFO L124 PetriNetUnfolderBase]: 7394/13025 cut-off events. [2023-11-17 12:31:12,932 INFO L125 PetriNetUnfolderBase]: For 517164/517164 co-relation queries the response was YES. [2023-11-17 12:31:13,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187321 conditions, 13025 events. 7394/13025 cut-off events. For 517164/517164 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 102746 event pairs, 99 based on Foata normal form. 26/13051 useless extension candidates. Maximal degree in co-relation 186850. Up to 4369 conditions per place. [2023-11-17 12:31:13,127 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 638 selfloop transitions, 2902 changer transitions 28/3568 dead transitions. [2023-11-17 12:31:13,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 3568 transitions, 131284 flow [2023-11-17 12:31:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-17 12:31:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-17 12:31:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 369 transitions. [2023-11-17 12:31:13,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27828054298642535 [2023-11-17 12:31:13,129 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 369 transitions. [2023-11-17 12:31:13,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 369 transitions. [2023-11-17 12:31:13,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:13,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 369 transitions. [2023-11-17 12:31:13,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 7.235294117647059) internal successors, (369), 51 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:13,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 26.0) internal successors, (1352), 52 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:13,131 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 26.0) internal successors, (1352), 52 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:13,131 INFO L175 Difference]: Start difference. First operand has 668 places, 3321 transitions, 118561 flow. Second operand 51 states and 369 transitions. [2023-11-17 12:31:13,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 3568 transitions, 131284 flow [2023-11-17 12:31:27,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 3568 transitions, 130474 flow, removed 314 selfloop flow, removed 18 redundant places. [2023-11-17 12:31:27,114 INFO L231 Difference]: Finished difference. Result has 707 places, 3415 transitions, 127607 flow [2023-11-17 12:31:27,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=117803, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=127607, PETRI_PLACES=707, PETRI_TRANSITIONS=3415} [2023-11-17 12:31:27,117 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 687 predicate places. [2023-11-17 12:31:27,117 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 3415 transitions, 127607 flow [2023-11-17 12:31:27,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:27,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:27,118 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:27,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-17 12:31:27,321 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 12:31:27,322 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:31:27,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:27,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2030766482, now seen corresponding path program 30 times [2023-11-17 12:31:27,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:27,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760694261] [2023-11-17 12:31:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:27,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:27,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:27,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760694261] [2023-11-17 12:31:27,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760694261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:31:27,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100726645] [2023-11-17 12:31:27,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:31:27,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:31:27,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:27,447 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:31:27,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 12:31:27,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:31:27,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:31:27,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:31:27,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:31:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:27,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:31:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:27,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100726645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:31:27,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:31:27,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-11-17 12:31:27,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325172802] [2023-11-17 12:31:27,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:31:27,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:31:27,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:31:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:31:27,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:31:27,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 3415 transitions, 127607 flow. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:27,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:27,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:31:27,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:42,781 INFO L124 PetriNetUnfolderBase]: 8044/14415 cut-off events. [2023-11-17 12:31:42,781 INFO L125 PetriNetUnfolderBase]: For 640878/640878 co-relation queries the response was YES. [2023-11-17 12:31:42,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212193 conditions, 14415 events. 8044/14415 cut-off events. For 640878/640878 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 117786 event pairs, 113 based on Foata normal form. 90/14505 useless extension candidates. Maximal degree in co-relation 211206. Up to 5068 conditions per place. [2023-11-17 12:31:43,042 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 567 selfloop transitions, 3286 changer transitions 5/3858 dead transitions. [2023-11-17 12:31:43,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 3858 transitions, 148511 flow [2023-11-17 12:31:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-17 12:31:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-17 12:31:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 380 transitions. [2023-11-17 12:31:43,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28106508875739644 [2023-11-17 12:31:43,044 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 380 transitions. [2023-11-17 12:31:43,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 380 transitions. [2023-11-17 12:31:43,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:43,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 380 transitions. [2023-11-17 12:31:43,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 7.3076923076923075) internal successors, (380), 52 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:43,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 26.0) internal successors, (1378), 53 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:43,047 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 26.0) internal successors, (1378), 53 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:43,047 INFO L175 Difference]: Start difference. First operand has 707 places, 3415 transitions, 127607 flow. Second operand 52 states and 380 transitions. [2023-11-17 12:31:43,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 3858 transitions, 148511 flow [2023-11-17 12:32:01,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 3858 transitions, 146346 flow, removed 305 selfloop flow, removed 29 redundant places. [2023-11-17 12:32:02,038 INFO L231 Difference]: Finished difference. Result has 738 places, 3733 transitions, 146212 flow [2023-11-17 12:32:02,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=125344, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2963, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=146212, PETRI_PLACES=738, PETRI_TRANSITIONS=3733} [2023-11-17 12:32:02,041 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 718 predicate places. [2023-11-17 12:32:02,041 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 3733 transitions, 146212 flow [2023-11-17 12:32:02,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:02,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:02,041 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:02,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:02,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-17 12:32:02,247 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:02,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1887826906, now seen corresponding path program 31 times [2023-11-17 12:32:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:02,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955376844] [2023-11-17 12:32:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:02,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:02,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:02,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955376844] [2023-11-17 12:32:02,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955376844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:02,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954980358] [2023-11-17 12:32:02,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:32:02,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:02,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:02,388 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:02,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 12:32:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:02,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:32:02,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:02,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954980358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:02,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:02,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-17 12:32:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317261242] [2023-11-17 12:32:02,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:02,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:32:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:32:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:32:02,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:32:02,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 3733 transitions, 146212 flow. Second operand has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:02,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:02,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:32:02,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:26,542 INFO L124 PetriNetUnfolderBase]: 8375/15030 cut-off events. [2023-11-17 12:32:26,542 INFO L125 PetriNetUnfolderBase]: For 661888/661888 co-relation queries the response was YES. [2023-11-17 12:32:26,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230449 conditions, 15030 events. 8375/15030 cut-off events. For 661888/661888 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 123481 event pairs, 91 based on Foata normal form. 52/15082 useless extension candidates. Maximal degree in co-relation 229420. Up to 4513 conditions per place. [2023-11-17 12:32:26,855 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 600 selfloop transitions, 3391 changer transitions 26/4017 dead transitions. [2023-11-17 12:32:26,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 792 places, 4017 transitions, 162116 flow [2023-11-17 12:32:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-17 12:32:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-17 12:32:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 397 transitions. [2023-11-17 12:32:26,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2776223776223776 [2023-11-17 12:32:26,856 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 397 transitions. [2023-11-17 12:32:26,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 397 transitions. [2023-11-17 12:32:26,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:26,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 397 transitions. [2023-11-17 12:32:26,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 7.218181818181818) internal successors, (397), 55 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:26,858 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 12:32:26,858 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 12:32:26,859 INFO L175 Difference]: Start difference. First operand has 738 places, 3733 transitions, 146212 flow. Second operand 55 states and 397 transitions. [2023-11-17 12:32:26,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 792 places, 4017 transitions, 162116 flow [2023-11-17 12:32:51,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 4017 transitions, 159931 flow, removed 655 selfloop flow, removed 29 redundant places. [2023-11-17 12:32:51,267 INFO L231 Difference]: Finished difference. Result has 772 places, 3863 transitions, 157591 flow [2023-11-17 12:32:51,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=143743, PETRI_DIFFERENCE_MINUEND_PLACES=709, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=157591, PETRI_PLACES=772, PETRI_TRANSITIONS=3863} [2023-11-17 12:32:51,271 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 752 predicate places. [2023-11-17 12:32:51,271 INFO L495 AbstractCegarLoop]: Abstraction has has 772 places, 3863 transitions, 157591 flow [2023-11-17 12:32:51,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:51,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:51,272 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:51,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:51,477 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:51,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1173081244, now seen corresponding path program 32 times [2023-11-17 12:32:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:51,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615405252] [2023-11-17 12:32:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:51,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:51,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:51,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615405252] [2023-11-17 12:32:51,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615405252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:51,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881616881] [2023-11-17 12:32:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:32:51,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:51,601 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:51,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 12:32:51,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:32:51,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:51,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:32:51,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:51,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:51,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881616881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:51,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-11-17 12:32:51,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162437659] [2023-11-17 12:32:51,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:51,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:32:51,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:32:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:32:51,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:32:51,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 772 places, 3863 transitions, 157591 flow. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:51,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:51,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:32:51,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:16,055 INFO L124 PetriNetUnfolderBase]: 8148/14371 cut-off events. [2023-11-17 12:33:16,056 INFO L125 PetriNetUnfolderBase]: For 700754/700754 co-relation queries the response was YES. [2023-11-17 12:33:16,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230839 conditions, 14371 events. 8148/14371 cut-off events. For 700754/700754 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 115465 event pairs, 330 based on Foata normal form. 56/14427 useless extension candidates. Maximal degree in co-relation 230656. Up to 7617 conditions per place. [2023-11-17 12:33:16,307 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 982 selfloop transitions, 2874 changer transitions 10/3866 dead transitions. [2023-11-17 12:33:16,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 3866 transitions, 162853 flow [2023-11-17 12:33:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 12:33:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 12:33:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 285 transitions. [2023-11-17 12:33:16,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27403846153846156 [2023-11-17 12:33:16,325 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 285 transitions. [2023-11-17 12:33:16,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 285 transitions. [2023-11-17 12:33:16,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:16,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 285 transitions. [2023-11-17 12:33:16,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 7.125) internal successors, (285), 40 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:16,327 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 12:33:16,327 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 12:33:16,327 INFO L175 Difference]: Start difference. First operand has 772 places, 3863 transitions, 157591 flow. Second operand 40 states and 285 transitions. [2023-11-17 12:33:16,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 3866 transitions, 162853 flow [2023-11-17 12:33:43,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 3866 transitions, 158398 flow, removed 384 selfloop flow, removed 31 redundant places. [2023-11-17 12:33:43,713 INFO L231 Difference]: Finished difference. Result has 780 places, 3777 transitions, 156798 flow [2023-11-17 12:33:43,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=149327, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=156798, PETRI_PLACES=780, PETRI_TRANSITIONS=3777} [2023-11-17 12:33:43,736 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 760 predicate places. [2023-11-17 12:33:43,736 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 3777 transitions, 156798 flow [2023-11-17 12:33:43,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:43,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:43,736 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:43,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 12:33:43,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:43,937 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:33:43,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash -521433626, now seen corresponding path program 33 times [2023-11-17 12:33:43,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:43,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413999557] [2023-11-17 12:33:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:43,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:44,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:44,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413999557] [2023-11-17 12:33:44,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413999557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:44,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602469048] [2023-11-17 12:33:44,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:33:44,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:44,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:44,070 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:33:44,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 12:33:44,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:33:44,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:44,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:33:44,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:44,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:44,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602469048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:44,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:44,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-11-17 12:33:44,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121670422] [2023-11-17 12:33:44,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:44,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:33:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:33:44,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:33:44,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:33:44,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 3777 transitions, 156798 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:44,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:44,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:33:44,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:06,398 INFO L124 PetriNetUnfolderBase]: 8718/15361 cut-off events. [2023-11-17 12:34:06,398 INFO L125 PetriNetUnfolderBase]: For 771874/771874 co-relation queries the response was YES. [2023-11-17 12:34:06,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250422 conditions, 15361 events. 8718/15361 cut-off events. For 771874/771874 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 124406 event pairs, 103 based on Foata normal form. 28/15389 useless extension candidates. Maximal degree in co-relation 250236. Up to 4612 conditions per place. [2023-11-17 12:34:06,648 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 747 selfloop transitions, 3384 changer transitions 19/4150 dead transitions. [2023-11-17 12:34:06,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 4150 transitions, 177442 flow [2023-11-17 12:34:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 12:34:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 12:34:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 355 transitions. [2023-11-17 12:34:06,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27864992150706436 [2023-11-17 12:34:06,650 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 355 transitions. [2023-11-17 12:34:06,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 355 transitions. [2023-11-17 12:34:06,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:06,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 355 transitions. [2023-11-17 12:34:06,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 7.244897959183674) internal successors, (355), 49 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:06,652 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 12:34:06,652 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 12:34:06,652 INFO L175 Difference]: Start difference. First operand has 780 places, 3777 transitions, 156798 flow. Second operand 49 states and 355 transitions. [2023-11-17 12:34:06,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 4150 transitions, 177442 flow [2023-11-17 12:34:34,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 4150 transitions, 174085 flow, removed 149 selfloop flow, removed 29 redundant places. [2023-11-17 12:34:34,846 INFO L231 Difference]: Finished difference. Result has 804 places, 4023 transitions, 172971 flow [2023-11-17 12:34:34,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=153605, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=172971, PETRI_PLACES=804, PETRI_TRANSITIONS=4023} [2023-11-17 12:34:34,849 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 784 predicate places. [2023-11-17 12:34:34,849 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 4023 transitions, 172971 flow [2023-11-17 12:34:34,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:34,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:34,850 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:34,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:35,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-17 12:34:35,055 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:34:35,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1770900948, now seen corresponding path program 34 times [2023-11-17 12:34:35,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:35,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088320231] [2023-11-17 12:34:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:35,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:35,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088320231] [2023-11-17 12:34:35,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088320231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:35,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427277614] [2023-11-17 12:34:35,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:34:35,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:35,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:35,183 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:35,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 12:34:35,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:34:35,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:35,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:34:35,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:35,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427277614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:35,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:35,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-11-17 12:34:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374593957] [2023-11-17 12:34:35,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:35,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:34:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:34:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:34:35,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:34:35,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 4023 transitions, 172971 flow. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:35,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:35,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:34:35,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:57,310 INFO L124 PetriNetUnfolderBase]: 9353/16437 cut-off events. [2023-11-17 12:34:57,310 INFO L125 PetriNetUnfolderBase]: For 865725/865725 co-relation queries the response was YES. [2023-11-17 12:34:57,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278315 conditions, 16437 events. 9353/16437 cut-off events. For 865725/865725 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 133922 event pairs, 143 based on Foata normal form. 5/16442 useless extension candidates. Maximal degree in co-relation 278124. Up to 5310 conditions per place. [2023-11-17 12:34:57,607 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 2020 selfloop transitions, 2481 changer transitions 8/4509 dead transitions. [2023-11-17 12:34:57,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 4509 transitions, 197913 flow [2023-11-17 12:34:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-17 12:34:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-11-17 12:34:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 483 transitions. [2023-11-17 12:34:57,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27319004524886875 [2023-11-17 12:34:57,609 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 483 transitions. [2023-11-17 12:34:57,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 483 transitions. [2023-11-17 12:34:57,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:57,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 483 transitions. [2023-11-17 12:34:57,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 7.102941176470588) internal successors, (483), 68 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:57,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 26.0) internal successors, (1794), 69 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:57,611 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 26.0) internal successors, (1794), 69 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:57,611 INFO L175 Difference]: Start difference. First operand has 804 places, 4023 transitions, 172971 flow. Second operand 68 states and 483 transitions. [2023-11-17 12:34:57,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 4509 transitions, 197913 flow [2023-11-17 12:35:35,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 4509 transitions, 197125 flow, removed 315 selfloop flow, removed 15 redundant places. [2023-11-17 12:35:35,277 INFO L231 Difference]: Finished difference. Result has 863 places, 4322 transitions, 192247 flow [2023-11-17 12:35:35,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=172275, PETRI_DIFFERENCE_MINUEND_PLACES=789, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=192247, PETRI_PLACES=863, PETRI_TRANSITIONS=4322} [2023-11-17 12:35:35,280 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 843 predicate places. [2023-11-17 12:35:35,280 INFO L495 AbstractCegarLoop]: Abstraction has has 863 places, 4322 transitions, 192247 flow [2023-11-17 12:35:35,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:35,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:35:35,281 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:35:35,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 12:35:35,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-17 12:35:35,486 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:35:35,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:35:35,486 INFO L85 PathProgramCache]: Analyzing trace with hash 285452282, now seen corresponding path program 35 times [2023-11-17 12:35:35,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:35:35,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109646854] [2023-11-17 12:35:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:35:35,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:35:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:35:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:35:35,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:35:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109646854] [2023-11-17 12:35:35,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109646854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:35:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206696161] [2023-11-17 12:35:35,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:35:35,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:35:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:35:35,623 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:35:35,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:35:35,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:35:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:35:35,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:35:35,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:35:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:35:35,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:35:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:35:36,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206696161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:35:36,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:35:36,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-17 12:35:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145361974] [2023-11-17 12:35:36,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:35:36,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:35:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:35:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:35:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:35:36,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:35:36,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 863 places, 4322 transitions, 192247 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:35:36,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:35:36,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:35:36,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:36:03,021 INFO L124 PetriNetUnfolderBase]: 10888/19045 cut-off events. [2023-11-17 12:36:03,021 INFO L125 PetriNetUnfolderBase]: For 1083585/1083585 co-relation queries the response was YES. [2023-11-17 12:36:03,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332339 conditions, 19045 events. 10888/19045 cut-off events. For 1083585/1083585 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 157940 event pairs, 79 based on Foata normal form. 98/19143 useless extension candidates. Maximal degree in co-relation 332142. Up to 4824 conditions per place. [2023-11-17 12:36:03,360 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 843 selfloop transitions, 4260 changer transitions 58/5161 dead transitions. [2023-11-17 12:36:03,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 912 places, 5161 transitions, 236342 flow [2023-11-17 12:36:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-17 12:36:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-17 12:36:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 375 transitions. [2023-11-17 12:36:03,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27736686390532544 [2023-11-17 12:36:03,364 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 375 transitions. [2023-11-17 12:36:03,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 375 transitions. [2023-11-17 12:36:03,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:36:03,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 375 transitions. [2023-11-17 12:36:03,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 7.211538461538462) internal successors, (375), 52 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:36:03,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 26.0) internal successors, (1378), 53 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:36:03,383 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 26.0) internal successors, (1378), 53 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:36:03,383 INFO L175 Difference]: Start difference. First operand has 863 places, 4322 transitions, 192247 flow. Second operand 52 states and 375 transitions. [2023-11-17 12:36:03,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 912 places, 5161 transitions, 236342 flow [2023-11-17 12:36:57,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 894 places, 5161 transitions, 235358 flow, removed 249 selfloop flow, removed 18 redundant places. [2023-11-17 12:36:57,190 INFO L231 Difference]: Finished difference. Result has 908 places, 5000 transitions, 234347 flow [2023-11-17 12:36:57,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=190921, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=234347, PETRI_PLACES=908, PETRI_TRANSITIONS=5000} [2023-11-17 12:36:57,194 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 888 predicate places. [2023-11-17 12:36:57,194 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 5000 transitions, 234347 flow [2023-11-17 12:36:57,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:36:57,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:36:57,194 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:36:57,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 12:36:57,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 12:36:57,399 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:36:57,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:36:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1326719206, now seen corresponding path program 36 times [2023-11-17 12:36:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:36:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821119230] [2023-11-17 12:36:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:36:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:36:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:36:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:36:57,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:36:57,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821119230] [2023-11-17 12:36:57,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821119230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:36:57,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898588942] [2023-11-17 12:36:57,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:36:57,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:36:57,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:36:57,532 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:36:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:36:57,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:36:57,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:36:57,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:36:57,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:36:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:36:57,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:36:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:36:57,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898588942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:36:57,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:36:57,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-17 12:36:57,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917093498] [2023-11-17 12:36:57,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:36:57,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:36:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:36:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:36:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:36:57,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:36:57,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 5000 transitions, 234347 flow. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:36:57,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:36:57,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:36:57,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:37:35,509 INFO L124 PetriNetUnfolderBase]: 11748/20611 cut-off events. [2023-11-17 12:37:35,510 INFO L125 PetriNetUnfolderBase]: For 1303867/1303867 co-relation queries the response was YES. [2023-11-17 12:37:35,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377687 conditions, 20611 events. 11748/20611 cut-off events. For 1303867/1303867 co-relation queries the response was YES. Maximal size of possible extension queue 1454. Compared 173718 event pairs, 223 based on Foata normal form. 20/20631 useless extension candidates. Maximal degree in co-relation 377476. Up to 6717 conditions per place. [2023-11-17 12:37:36,098 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 1535 selfloop transitions, 3987 changer transitions 26/5548 dead transitions. [2023-11-17 12:37:36,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 5548 transitions, 267237 flow [2023-11-17 12:37:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-17 12:37:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-17 12:37:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 396 transitions. [2023-11-17 12:37:36,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27692307692307694 [2023-11-17 12:37:36,105 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 396 transitions. [2023-11-17 12:37:36,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 396 transitions. [2023-11-17 12:37:36,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:37:36,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 396 transitions. [2023-11-17 12:37:36,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 7.2) internal successors, (396), 55 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:37:36,108 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 12:37:36,108 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 12:37:36,108 INFO L175 Difference]: Start difference. First operand has 908 places, 5000 transitions, 234347 flow. Second operand 55 states and 396 transitions. [2023-11-17 12:37:36,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 5548 transitions, 267237 flow Received shutdown request... [2023-11-17 12:37:59,886 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:37:59,886 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 12:37:59,913 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:37:59,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 12:38:00,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:00,119 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 12:38:00,120 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:38:00,120 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:38:00,120 INFO L445 BasicCegarLoop]: Path program histogram: [36, 1, 1] [2023-11-17 12:38:00,124 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:38:00,125 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:38:00,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:38:00 BasicIcfg [2023-11-17 12:38:00,127 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:38:00,128 INFO L158 Benchmark]: Toolchain (without parser) took 554049.96ms. Allocated memory was 203.4MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 150.8MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2023-11-17 12:38:00,131 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 203.4MB. Free memory was 152.7MB in the beginning and 152.5MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:38:00,132 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.44ms. Allocated memory is still 203.4MB. Free memory was 150.8MB in the beginning and 139.2MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:38:00,132 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.37ms. Allocated memory is still 203.4MB. Free memory was 139.2MB in the beginning and 137.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:38:00,132 INFO L158 Benchmark]: Boogie Preprocessor took 33.66ms. Allocated memory is still 203.4MB. Free memory was 137.4MB in the beginning and 136.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:38:00,133 INFO L158 Benchmark]: RCFGBuilder took 367.53ms. Allocated memory is still 203.4MB. Free memory was 136.1MB in the beginning and 113.3MB in the end (delta: 22.8MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-11-17 12:38:00,134 INFO L158 Benchmark]: TraceAbstraction took 553410.66ms. Allocated memory was 203.4MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 112.6MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2023-11-17 12:38:00,137 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 203.4MB. Free memory was 152.7MB in the beginning and 152.5MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.44ms. Allocated memory is still 203.4MB. Free memory was 150.8MB in the beginning and 139.2MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.37ms. Allocated memory is still 203.4MB. Free memory was 139.2MB in the beginning and 137.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.66ms. Allocated memory is still 203.4MB. Free memory was 137.4MB in the beginning and 136.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 367.53ms. Allocated memory is still 203.4MB. Free memory was 136.1MB in the beginning and 113.3MB in the end (delta: 22.8MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 553410.66ms. Allocated memory was 203.4MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 112.6MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 2.2GB. 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: 3, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 3, dependent conditional: 0, dependent unconditional: 3, 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: 77]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - 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: 553.3s, OverallIterations: 38, TraceHistogramMax: 4, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 530.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3436 SdHoareTripleChecker+Valid, 8.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3436 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 6.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 934 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18933 IncrementalHoareTripleChecker+Invalid, 19867 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 934 mSolverCounterUnsat, 0 mSDtfsCounter, 18933 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3044 GetRequests, 1466 SyntacticMatches, 55 SemanticMatches, 1523 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24431 ImplicationChecksByTransitivity, 14.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234347occurred in iteration=37, InterpolantAutomatonStates: 1159, 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, 0.8s SatisfiabilityAnalysisTime, 11.9s InterpolantComputationTime, 1329 NumberOfCodeBlocks, 1317 NumberOfCodeBlocksAsserted, 122 NumberOfCheckSat, 1870 ConstructedInterpolants, 0 QuantifiedInterpolants, 9683 SizeOfPredicates, 230 NumberOfNonLiveVariables, 4581 ConjunctsInSsa, 408 ConjunctsInUnsatCore, 110 InterpolantComputations, 2 PerfectInterpolantSequences, 285/1063 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