/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-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:27:27,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:27:27,549 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 12:27:27,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:27:27,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:27:27,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:27:27,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:27:27,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:27:27,575 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:27:27,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:27:27,579 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:27:27,579 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:27:27,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:27:27,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:27:27,580 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:27:27,581 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:27:27,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:27:27,581 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:27:27,581 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:27:27,581 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:27:27,582 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:27:27,582 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:27:27,583 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:27:27,583 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:27:27,583 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:27:27,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:27:27,584 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:27:27,584 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:27:27,584 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:27:27,584 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:27:27,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:27:27,585 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:27:27,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:27:27,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:27:27,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:27:27,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:27:27,767 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:27:27,768 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:27:27,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-17 12:27:28,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:27:29,030 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:27:29,031 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-17 12:27:29,041 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaab9308e/fc6ca7afa60b4eef98eef53420c43282/FLAG8d8eb7f3c [2023-11-17 12:27:29,051 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaab9308e/fc6ca7afa60b4eef98eef53420c43282 [2023-11-17 12:27:29,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:27:29,054 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:27:29,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:27:29,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:27:29,058 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:27:29,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39159a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29, skipping insertion in model container [2023-11-17 12:27:29,059 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,077 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:27:29,207 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-alt.wvr.c[2124,2137] [2023-11-17 12:27:29,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:27:29,217 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:27:29,233 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-alt.wvr.c[2124,2137] [2023-11-17 12:27:29,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:27:29,238 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:27:29,238 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:27:29,243 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:27:29,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29 WrapperNode [2023-11-17 12:27:29,243 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:27:29,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:27:29,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:27:29,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:27:29,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,253 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,265 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-11-17 12:27:29,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:27:29,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:27:29,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:27:29,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:27:29,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,289 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,295 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,296 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,297 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:27:29,298 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:27:29,298 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:27:29,298 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:27:29,301 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (1/1) ... [2023-11-17 12:27:29,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:27:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:29,358 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 12:27:29,396 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 12:27:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:27:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:27:29,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:27:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:27:29,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:27:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:27:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:27:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:27:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:27:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:27:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:27:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:27:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:27:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:27:29,407 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 12:27:29,480 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:27:29,482 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:27:29,664 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:27:29,842 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:27:29,843 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:27:29,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:27:29 BoogieIcfgContainer [2023-11-17 12:27:29,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:27:29,846 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:27:29,846 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:27:29,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:27:29,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:27:29" (1/3) ... [2023-11-17 12:27:29,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7ddb59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:27:29, skipping insertion in model container [2023-11-17 12:27:29,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:27:29" (2/3) ... [2023-11-17 12:27:29,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7ddb59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:27:29, skipping insertion in model container [2023-11-17 12:27:29,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:27:29" (3/3) ... [2023-11-17 12:27:29,851 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-17 12:27:29,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:27:29,864 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:27:29,864 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:27:29,910 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:27:29,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2023-11-17 12:27:29,979 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 12:27:29,979 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:27:29,983 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 12:27:29,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2023-11-17 12:27:29,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2023-11-17 12:27:29,989 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:27:30,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 19 transitions, 50 flow [2023-11-17 12:27:30,006 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 19 transitions, 50 flow [2023-11-17 12:27:30,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 50 flow [2023-11-17 12:27:30,021 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-17 12:27:30,021 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:27:30,022 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 12:27:30,023 INFO L119 LiptonReduction]: Number of co-enabled transitions 94 [2023-11-17 12:27:30,213 INFO L134 LiptonReduction]: Checked pairs total: 111 [2023-11-17 12:27:30,213 INFO L136 LiptonReduction]: Total number of compositions: 4 [2023-11-17 12:27:30,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:27:30,239 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;@7a7591b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:27:30,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:27:30,245 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:27:30,246 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:27:30,246 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:27:30,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:30,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:30,247 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 12:27:30,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash -488349768, now seen corresponding path program 1 times [2023-11-17 12:27:30,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:30,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244321915] [2023-11-17 12:27:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:30,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:30,492 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 12:27:30,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:30,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244321915] [2023-11-17 12:27:30,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244321915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:27:30,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:27:30,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:27:30,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884063383] [2023-11-17 12:27:30,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:27:30,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:27:30,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:27:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:27:30,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2023-11-17 12:27:30,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:30,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:30,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2023-11-17 12:27:30,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:30,611 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-17 12:27:30,611 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-17 12:27:30,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 92 events. 51/92 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 180 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 12:27:30,615 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-17 12:27:30,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 103 flow [2023-11-17 12:27:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:27:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:27:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2023-11-17 12:27:30,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 12:27:30,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 39 transitions. [2023-11-17 12:27:30,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 39 transitions. [2023-11-17 12:27:30,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:30,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 39 transitions. [2023-11-17 12:27:30,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:30,633 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 12:27:30,634 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 12:27:30,635 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 39 transitions. [2023-11-17 12:27:30,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 103 flow [2023-11-17 12:27:30,638 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 12:27:30,640 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-17 12:27:30,642 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 12:27:30,645 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-17 12:27:30,645 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-17 12:27:30,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:30,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:30,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:30,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:27:30,646 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 12:27:30,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash -677099244, now seen corresponding path program 1 times [2023-11-17 12:27:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:30,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144236501] [2023-11-17 12:27:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:30,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:30,804 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 12:27:30,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144236501] [2023-11-17 12:27:30,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144236501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:27:30,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:27:30,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:27:30,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114362420] [2023-11-17 12:27:30,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:27:30,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:27:30,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:27:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:27:30,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2023-11-17 12:27:30,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:30,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:30,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2023-11-17 12:27:30,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:30,881 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-17 12:27:30,882 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-17 12:27:30,882 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 266 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 12:27:30,883 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-17 12:27:30,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 123 flow [2023-11-17 12:27:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:27:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:27:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2023-11-17 12:27:30,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 12:27:30,884 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 39 transitions. [2023-11-17 12:27:30,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 39 transitions. [2023-11-17 12:27:30,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:30,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 39 transitions. [2023-11-17 12:27:30,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:30,885 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 12:27:30,886 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 12:27:30,886 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 39 transitions. [2023-11-17 12:27:30,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 123 flow [2023-11-17 12:27:30,886 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 12:27:30,887 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-17 12:27:30,887 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 12:27:30,888 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-17 12:27:30,888 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-17 12:27:30,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:30,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:30,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:30,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:27:30,889 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 12:27:30,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2027330530, now seen corresponding path program 1 times [2023-11-17 12:27:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:30,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62815610] [2023-11-17 12:27:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:30,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:31,234 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 12:27:31,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62815610] [2023-11-17 12:27:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62815610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696213131] [2023-11-17 12:27:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:31,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:31,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:31,238 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 12:27:31,280 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 12:27:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:31,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:27:31,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:31,528 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 12:27:31,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:31,895 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 12:27:31,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696213131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:31,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:31,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:27:31,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058985552] [2023-11-17 12:27:31,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:31,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:27:31,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:31,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:27:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:27:31,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:31,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:31,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:31,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:31,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:32,449 INFO L124 PetriNetUnfolderBase]: 167/324 cut-off events. [2023-11-17 12:27:32,449 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-17 12:27:32,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 324 events. 167/324 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1253 event pairs, 20 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 306. Up to 107 conditions per place. [2023-11-17 12:27:32,451 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 66 selfloop transitions, 30 changer transitions 29/125 dead transitions. [2023-11-17 12:27:32,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 125 transitions, 625 flow [2023-11-17 12:27:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:27:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:27:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 185 transitions. [2023-11-17 12:27:32,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33882783882783885 [2023-11-17 12:27:32,454 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 185 transitions. [2023-11-17 12:27:32,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 185 transitions. [2023-11-17 12:27:32,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:32,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 185 transitions. [2023-11-17 12:27:32,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 8.80952380952381) internal successors, (185), 21 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:32,457 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 12:27:32,457 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 12:27:32,457 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 21 states and 185 transitions. [2023-11-17 12:27:32,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 125 transitions, 625 flow [2023-11-17 12:27:32,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 125 transitions, 611 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 12:27:32,460 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 281 flow [2023-11-17 12:27:32,460 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=281, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-17 12:27:32,460 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-17 12:27:32,460 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 281 flow [2023-11-17 12:27:32,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:32,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:32,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:32,469 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 12:27:32,666 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 12:27:32,666 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 12:27:32,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash -598475622, now seen corresponding path program 2 times [2023-11-17 12:27:32,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:32,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53481576] [2023-11-17 12:27:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:32,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:32,832 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 12:27:32,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:32,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53481576] [2023-11-17 12:27:32,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53481576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:32,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480169303] [2023-11-17 12:27:32,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:27:32,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:32,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:32,834 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 12:27:32,860 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 12:27:32,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:32,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:32,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:27:32,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:33,016 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 12:27:33,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:33,262 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 12:27:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480169303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:33,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:27:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421223303] [2023-11-17 12:27:33,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:33,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:27:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:27:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:27:33,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:33,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 281 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:33,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:33,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:33,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:33,872 INFO L124 PetriNetUnfolderBase]: 187/389 cut-off events. [2023-11-17 12:27:33,872 INFO L125 PetriNetUnfolderBase]: For 844/844 co-relation queries the response was YES. [2023-11-17 12:27:33,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 389 events. 187/389 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1724 event pairs, 22 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 1478. Up to 135 conditions per place. [2023-11-17 12:27:33,876 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 79 selfloop transitions, 44 changer transitions 15/138 dead transitions. [2023-11-17 12:27:33,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 138 transitions, 974 flow [2023-11-17 12:27:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:27:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:27:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 187 transitions. [2023-11-17 12:27:33,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2023-11-17 12:27:33,893 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 187 transitions. [2023-11-17 12:27:33,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 187 transitions. [2023-11-17 12:27:33,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:33,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 187 transitions. [2023-11-17 12:27:33,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:33,895 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 12:27:33,896 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 12:27:33,896 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 281 flow. Second operand 22 states and 187 transitions. [2023-11-17 12:27:33,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 138 transitions, 974 flow [2023-11-17 12:27:33,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 138 transitions, 860 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-11-17 12:27:33,903 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 461 flow [2023-11-17 12:27:33,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=461, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2023-11-17 12:27:33,903 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2023-11-17 12:27:33,904 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 461 flow [2023-11-17 12:27:33,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:33,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:33,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:33,911 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 12:27:34,109 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 12:27:34,109 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 12:27:34,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:34,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1180951190, now seen corresponding path program 3 times [2023-11-17 12:27:34,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:34,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766045784] [2023-11-17 12:27:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:34,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:34,286 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 12:27:34,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:34,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766045784] [2023-11-17 12:27:34,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766045784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:34,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690173674] [2023-11-17 12:27:34,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:27:34,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:34,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:34,288 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 12:27:34,312 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 12:27:34,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:27:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:34,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:27:34,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:34,481 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 12:27:34,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:34,738 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 12:27:34,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690173674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:34,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:34,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:27:34,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354409927] [2023-11-17 12:27:34,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:27:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:27:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:27:34,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:34,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 461 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 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 12:27:34,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:34,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:34,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:35,281 INFO L124 PetriNetUnfolderBase]: 186/379 cut-off events. [2023-11-17 12:27:35,282 INFO L125 PetriNetUnfolderBase]: For 991/991 co-relation queries the response was YES. [2023-11-17 12:27:35,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 379 events. 186/379 cut-off events. For 991/991 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1614 event pairs, 22 based on Foata normal form. 1/380 useless extension candidates. Maximal degree in co-relation 1548. Up to 125 conditions per place. [2023-11-17 12:27:35,284 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 74 selfloop transitions, 45 changer transitions 18/137 dead transitions. [2023-11-17 12:27:35,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 137 transitions, 1017 flow [2023-11-17 12:27:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:27:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:27:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 198 transitions. [2023-11-17 12:27:35,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3173076923076923 [2023-11-17 12:27:35,285 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 198 transitions. [2023-11-17 12:27:35,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 198 transitions. [2023-11-17 12:27:35,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:35,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 198 transitions. [2023-11-17 12:27:35,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.25) internal successors, (198), 24 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:35,287 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 12:27:35,288 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 12:27:35,288 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 461 flow. Second operand 24 states and 198 transitions. [2023-11-17 12:27:35,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 137 transitions, 1017 flow [2023-11-17 12:27:35,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 137 transitions, 966 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-11-17 12:27:35,293 INFO L231 Difference]: Finished difference. Result has 88 places, 65 transitions, 497 flow [2023-11-17 12:27:35,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=497, PETRI_PLACES=88, PETRI_TRANSITIONS=65} [2023-11-17 12:27:35,294 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2023-11-17 12:27:35,294 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 65 transitions, 497 flow [2023-11-17 12:27:35,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 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 12:27:35,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:35,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:35,302 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 12:27:35,500 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 12:27:35,500 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 12:27:35,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1930787138, now seen corresponding path program 4 times [2023-11-17 12:27:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:35,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404737365] [2023-11-17 12:27:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:35,673 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 12:27:35,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404737365] [2023-11-17 12:27:35,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404737365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103705876] [2023-11-17 12:27:35,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:27:35,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:35,678 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 12:27:35,679 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 12:27:35,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:27:35,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:35,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:27:35,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:35,851 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 12:27:35,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:36,140 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 12:27:36,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103705876] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:36,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:36,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-17 12:27:36,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941722144] [2023-11-17 12:27:36,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:36,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:27:36,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:36,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:27:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:27:36,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:36,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 65 transitions, 497 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:36,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:36,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:36,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:36,793 INFO L124 PetriNetUnfolderBase]: 228/456 cut-off events. [2023-11-17 12:27:36,793 INFO L125 PetriNetUnfolderBase]: For 1248/1248 co-relation queries the response was YES. [2023-11-17 12:27:36,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 456 events. 228/456 cut-off events. For 1248/1248 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2074 event pairs, 12 based on Foata normal form. 2/458 useless extension candidates. Maximal degree in co-relation 1884. Up to 143 conditions per place. [2023-11-17 12:27:36,796 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 67 selfloop transitions, 54 changer transitions 23/144 dead transitions. [2023-11-17 12:27:36,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 144 transitions, 1104 flow [2023-11-17 12:27:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:27:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:27:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 197 transitions. [2023-11-17 12:27:36,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3294314381270903 [2023-11-17 12:27:36,798 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 197 transitions. [2023-11-17 12:27:36,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 197 transitions. [2023-11-17 12:27:36,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:36,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 197 transitions. [2023-11-17 12:27:36,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 8.565217391304348) internal successors, (197), 23 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 12:27:36,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 26.0) internal successors, (624), 24 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:36,799 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 26.0) internal successors, (624), 24 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:36,800 INFO L175 Difference]: Start difference. First operand has 88 places, 65 transitions, 497 flow. Second operand 23 states and 197 transitions. [2023-11-17 12:27:36,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 144 transitions, 1104 flow [2023-11-17 12:27:36,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 144 transitions, 999 flow, removed 11 selfloop flow, removed 18 redundant places. [2023-11-17 12:27:36,806 INFO L231 Difference]: Finished difference. Result has 92 places, 72 transitions, 604 flow [2023-11-17 12:27:36,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=604, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2023-11-17 12:27:36,807 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-11-17 12:27:36,807 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 604 flow [2023-11-17 12:27:36,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:36,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:36,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:36,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:27:37,033 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 12:27:37,033 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 12:27:37,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1487059970, now seen corresponding path program 5 times [2023-11-17 12:27:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:37,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102279862] [2023-11-17 12:27:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:37,100 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 12:27:37,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102279862] [2023-11-17 12:27:37,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102279862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623139338] [2023-11-17 12:27:37,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:27:37,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:37,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:37,101 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 12:27:37,129 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 12:27:37,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:37,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:37,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:27:37,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:37,197 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 12:27:37,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:37,225 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 12:27:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623139338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:37,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:37,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-17 12:27:37,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440094175] [2023-11-17 12:27:37,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:37,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:27:37,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:27:37,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:27:37,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2023-11-17 12:27:37,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 604 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:37,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:37,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2023-11-17 12:27:37,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:37,361 INFO L124 PetriNetUnfolderBase]: 205/389 cut-off events. [2023-11-17 12:27:37,361 INFO L125 PetriNetUnfolderBase]: For 1878/1878 co-relation queries the response was YES. [2023-11-17 12:27:37,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 389 events. 205/389 cut-off events. For 1878/1878 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1544 event pairs, 29 based on Foata normal form. 24/413 useless extension candidates. Maximal degree in co-relation 1820. Up to 296 conditions per place. [2023-11-17 12:27:37,363 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 63 selfloop transitions, 14 changer transitions 1/78 dead transitions. [2023-11-17 12:27:37,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 786 flow [2023-11-17 12:27:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:27:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:27:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2023-11-17 12:27:37,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 12:27:37,364 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 52 transitions. [2023-11-17 12:27:37,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 52 transitions. [2023-11-17 12:27:37,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:37,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 52 transitions. [2023-11-17 12:27:37,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:37,365 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 12:27:37,365 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 12:27:37,365 INFO L175 Difference]: Start difference. First operand has 92 places, 72 transitions, 604 flow. Second operand 5 states and 52 transitions. [2023-11-17 12:27:37,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 786 flow [2023-11-17 12:27:37,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 663 flow, removed 25 selfloop flow, removed 15 redundant places. [2023-11-17 12:27:37,372 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 489 flow [2023-11-17 12:27:37,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=489, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-11-17 12:27:37,372 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2023-11-17 12:27:37,372 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 489 flow [2023-11-17 12:27:37,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:37,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:37,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:37,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 12:27:37,577 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 12:27:37,578 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 12:27:37,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash -810195388, now seen corresponding path program 6 times [2023-11-17 12:27:37,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:37,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126665887] [2023-11-17 12:27:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:37,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:37,724 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 12:27:37,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:37,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126665887] [2023-11-17 12:27:37,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126665887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:37,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52212984] [2023-11-17 12:27:37,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:27:37,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:37,741 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 12:27:37,745 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 12:27:37,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:27:37,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:37,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:27:37,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:37,938 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 12:27:37,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:38,186 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 12:27:38,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52212984] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:38,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:38,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:27:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236932663] [2023-11-17 12:27:38,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:27:38,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:27:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:27:38,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:38,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 489 flow. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:38,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:38,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:38,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:38,552 INFO L124 PetriNetUnfolderBase]: 268/525 cut-off events. [2023-11-17 12:27:38,552 INFO L125 PetriNetUnfolderBase]: For 2215/2215 co-relation queries the response was YES. [2023-11-17 12:27:38,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2502 conditions, 525 events. 268/525 cut-off events. For 2215/2215 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2409 event pairs, 30 based on Foata normal form. 2/525 useless extension candidates. Maximal degree in co-relation 2260. Up to 372 conditions per place. [2023-11-17 12:27:38,555 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 88 selfloop transitions, 21 changer transitions 19/128 dead transitions. [2023-11-17 12:27:38,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 128 transitions, 1107 flow [2023-11-17 12:27:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:27:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:27:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 125 transitions. [2023-11-17 12:27:38,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32051282051282054 [2023-11-17 12:27:38,556 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 125 transitions. [2023-11-17 12:27:38,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 125 transitions. [2023-11-17 12:27:38,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:38,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 125 transitions. [2023-11-17 12:27:38,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:38,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 26.0) internal successors, (416), 16 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:38,558 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 26.0) internal successors, (416), 16 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:38,558 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 489 flow. Second operand 15 states and 125 transitions. [2023-11-17 12:27:38,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 128 transitions, 1107 flow [2023-11-17 12:27:38,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 1057 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-17 12:27:38,569 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 661 flow [2023-11-17 12:27:38,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=661, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2023-11-17 12:27:38,570 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-17 12:27:38,570 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 661 flow [2023-11-17 12:27:38,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:38,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:38,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:38,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:27:38,775 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 12:27:38,776 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 12:27:38,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash 223553338, now seen corresponding path program 7 times [2023-11-17 12:27:38,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:38,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924301581] [2023-11-17 12:27:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:38,930 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 12:27:38,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:38,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924301581] [2023-11-17 12:27:38,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924301581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:38,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234167787] [2023-11-17 12:27:38,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:27:38,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:38,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:38,932 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 12:27:38,973 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 12:27:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:39,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:27:39,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:39,159 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 12:27:39,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:39,396 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 12:27:39,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234167787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:39,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:39,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:27:39,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757568420] [2023-11-17 12:27:39,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:39,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:27:39,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:39,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:27:39,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:27:39,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:39,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 661 flow. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:39,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:39,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:39,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:39,716 INFO L124 PetriNetUnfolderBase]: 253/487 cut-off events. [2023-11-17 12:27:39,716 INFO L125 PetriNetUnfolderBase]: For 2190/2190 co-relation queries the response was YES. [2023-11-17 12:27:39,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2423 conditions, 487 events. 253/487 cut-off events. For 2190/2190 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2120 event pairs, 30 based on Foata normal form. 1/486 useless extension candidates. Maximal degree in co-relation 2367. Up to 382 conditions per place. [2023-11-17 12:27:39,719 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 79 selfloop transitions, 20 changer transitions 16/115 dead transitions. [2023-11-17 12:27:39,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 115 transitions, 1110 flow [2023-11-17 12:27:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:27:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:27:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2023-11-17 12:27:39,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2988165680473373 [2023-11-17 12:27:39,720 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 101 transitions. [2023-11-17 12:27:39,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 101 transitions. [2023-11-17 12:27:39,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:39,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 101 transitions. [2023-11-17 12:27:39,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 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 12:27:39,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 26.0) internal successors, (364), 14 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:39,721 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 26.0) internal successors, (364), 14 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:39,721 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 661 flow. Second operand 13 states and 101 transitions. [2023-11-17 12:27:39,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 115 transitions, 1110 flow [2023-11-17 12:27:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 115 transitions, 1063 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-11-17 12:27:39,729 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 690 flow [2023-11-17 12:27:39,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=690, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2023-11-17 12:27:39,730 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-11-17 12:27:39,730 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 690 flow [2023-11-17 12:27:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:39,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:39,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:39,749 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 12:27:39,933 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 12:27:39,933 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 12:27:39,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash 332699344, now seen corresponding path program 8 times [2023-11-17 12:27:39,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:39,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703285320] [2023-11-17 12:27:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:39,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:40,084 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 12:27:40,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:40,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703285320] [2023-11-17 12:27:40,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703285320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:40,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226400035] [2023-11-17 12:27:40,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:27:40,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:40,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:40,086 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 12:27:40,112 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 12:27:40,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:40,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:40,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:27:40,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:40,276 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 12:27:40,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:40,534 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 12:27:40,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226400035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:40,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:40,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:27:40,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122780061] [2023-11-17 12:27:40,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:40,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:27:40,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:40,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:27:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:27:40,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:40,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 690 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:40,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:40,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:40,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:40,858 INFO L124 PetriNetUnfolderBase]: 242/470 cut-off events. [2023-11-17 12:27:40,858 INFO L125 PetriNetUnfolderBase]: For 2011/2011 co-relation queries the response was YES. [2023-11-17 12:27:40,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 470 events. 242/470 cut-off events. For 2011/2011 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2020 event pairs, 18 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 2257. Up to 308 conditions per place. [2023-11-17 12:27:40,861 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 83 selfloop transitions, 27 changer transitions 20/130 dead transitions. [2023-11-17 12:27:40,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1223 flow [2023-11-17 12:27:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:27:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:27:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 121 transitions. [2023-11-17 12:27:40,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3324175824175824 [2023-11-17 12:27:40,862 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 121 transitions. [2023-11-17 12:27:40,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 121 transitions. [2023-11-17 12:27:40,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:40,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 121 transitions. [2023-11-17 12:27:40,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.642857142857142) internal successors, (121), 14 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 12:27:40,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 26.0) internal successors, (390), 15 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:40,863 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 26.0) internal successors, (390), 15 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:40,863 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 690 flow. Second operand 14 states and 121 transitions. [2023-11-17 12:27:40,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1223 flow [2023-11-17 12:27:40,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1163 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-17 12:27:40,871 INFO L231 Difference]: Finished difference. Result has 102 places, 81 transitions, 738 flow [2023-11-17 12:27:40,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=738, PETRI_PLACES=102, PETRI_TRANSITIONS=81} [2023-11-17 12:27:40,871 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-17 12:27:40,871 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 81 transitions, 738 flow [2023-11-17 12:27:40,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:40,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:40,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:40,891 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 12:27:41,076 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 12:27:41,076 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 12:27:41,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash -311676464, now seen corresponding path program 9 times [2023-11-17 12:27:41,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:41,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501390044] [2023-11-17 12:27:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:41,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:41,239 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 12:27:41,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501390044] [2023-11-17 12:27:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501390044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800502514] [2023-11-17 12:27:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:27:41,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:41,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:41,241 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 12:27:41,266 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 12:27:41,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:27:41,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:41,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:27:41,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:41,427 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 12:27:41,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:41,675 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 12:27:41,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800502514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:41,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:41,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 12:27:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072763671] [2023-11-17 12:27:41,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:27:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:27:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:27:41,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:41,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 81 transitions, 738 flow. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:41,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:41,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:41,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:41,949 INFO L124 PetriNetUnfolderBase]: 214/404 cut-off events. [2023-11-17 12:27:41,949 INFO L125 PetriNetUnfolderBase]: For 1645/1645 co-relation queries the response was YES. [2023-11-17 12:27:41,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2058 conditions, 404 events. 214/404 cut-off events. For 1645/1645 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1584 event pairs, 16 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 2002. Up to 309 conditions per place. [2023-11-17 12:27:41,952 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 77 selfloop transitions, 25 changer transitions 9/111 dead transitions. [2023-11-17 12:27:41,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 111 transitions, 1133 flow [2023-11-17 12:27:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:27:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:27:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 97 transitions. [2023-11-17 12:27:41,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2869822485207101 [2023-11-17 12:27:41,952 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 97 transitions. [2023-11-17 12:27:41,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 97 transitions. [2023-11-17 12:27:41,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:41,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 97 transitions. [2023-11-17 12:27:41,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:41,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 26.0) internal successors, (364), 14 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:41,954 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 26.0) internal successors, (364), 14 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:41,954 INFO L175 Difference]: Start difference. First operand has 102 places, 81 transitions, 738 flow. Second operand 13 states and 97 transitions. [2023-11-17 12:27:41,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 111 transitions, 1133 flow [2023-11-17 12:27:41,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 111 transitions, 1014 flow, removed 32 selfloop flow, removed 16 redundant places. [2023-11-17 12:27:41,962 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 715 flow [2023-11-17 12:27:41,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=715, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2023-11-17 12:27:41,962 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 75 predicate places. [2023-11-17 12:27:41,962 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 715 flow [2023-11-17 12:27:41,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:41,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:41,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:41,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:27:42,167 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 12:27:42,167 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 12:27:42,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash 77398136, now seen corresponding path program 10 times [2023-11-17 12:27:42,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:42,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062773725] [2023-11-17 12:27:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:42,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:42,314 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 12:27:42,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062773725] [2023-11-17 12:27:42,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062773725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:42,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592881319] [2023-11-17 12:27:42,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:27:42,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:42,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:42,316 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 12:27:42,327 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 12:27:42,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:27:42,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:42,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 12:27:42,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:27:42,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:42,706 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 12:27:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592881319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:42,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:42,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283117973] [2023-11-17 12:27:42,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:42,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:42,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:42,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:42,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 715 flow. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 12:27:42,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:42,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:42,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:43,622 INFO L124 PetriNetUnfolderBase]: 271/531 cut-off events. [2023-11-17 12:27:43,623 INFO L125 PetriNetUnfolderBase]: For 2780/2780 co-relation queries the response was YES. [2023-11-17 12:27:43,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 531 events. 271/531 cut-off events. For 2780/2780 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2422 event pairs, 6 based on Foata normal form. 3/532 useless extension candidates. Maximal degree in co-relation 2647. Up to 179 conditions per place. [2023-11-17 12:27:43,626 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 97 selfloop transitions, 88 changer transitions 30/215 dead transitions. [2023-11-17 12:27:43,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 215 transitions, 1845 flow [2023-11-17 12:27:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:27:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:27:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 272 transitions. [2023-11-17 12:27:43,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.317016317016317 [2023-11-17 12:27:43,627 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 272 transitions. [2023-11-17 12:27:43,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 272 transitions. [2023-11-17 12:27:43,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:43,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 272 transitions. [2023-11-17 12:27:43,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 8.242424242424242) internal successors, (272), 33 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:43,629 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 12:27:43,630 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 12:27:43,630 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 715 flow. Second operand 33 states and 272 transitions. [2023-11-17 12:27:43,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 215 transitions, 1845 flow [2023-11-17 12:27:43,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 215 transitions, 1735 flow, removed 19 selfloop flow, removed 12 redundant places. [2023-11-17 12:27:43,641 INFO L231 Difference]: Finished difference. Result has 119 places, 110 transitions, 1174 flow [2023-11-17 12:27:43,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1174, PETRI_PLACES=119, PETRI_TRANSITIONS=110} [2023-11-17 12:27:43,642 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 99 predicate places. [2023-11-17 12:27:43,642 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 110 transitions, 1174 flow [2023-11-17 12:27:43,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 12:27:43,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:43,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:43,649 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 12:27:43,847 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 12:27:43,847 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 12:27:43,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1782025370, now seen corresponding path program 11 times [2023-11-17 12:27:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756117515] [2023-11-17 12:27:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:43,990 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 12:27:43,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:43,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756117515] [2023-11-17 12:27:43,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756117515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:43,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246484147] [2023-11-17 12:27:43,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:27:43,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:43,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:43,991 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 12:27:43,997 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 12:27:44,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:44,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:44,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:44,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:44,230 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 12:27:44,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:44,546 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 12:27:44,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246484147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:44,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:44,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:44,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237230773] [2023-11-17 12:27:44,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:44,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:44,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:44,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:44,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:44,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 110 transitions, 1174 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:44,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:44,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:44,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:45,624 INFO L124 PetriNetUnfolderBase]: 354/719 cut-off events. [2023-11-17 12:27:45,625 INFO L125 PetriNetUnfolderBase]: For 4622/4622 co-relation queries the response was YES. [2023-11-17 12:27:45,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4182 conditions, 719 events. 354/719 cut-off events. For 4622/4622 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3685 event pairs, 20 based on Foata normal form. 4/723 useless extension candidates. Maximal degree in co-relation 4072. Up to 249 conditions per place. [2023-11-17 12:27:45,660 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 119 selfloop transitions, 104 changer transitions 29/252 dead transitions. [2023-11-17 12:27:45,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 252 transitions, 2649 flow [2023-11-17 12:27:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:27:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:27:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 294 transitions. [2023-11-17 12:27:45,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3230769230769231 [2023-11-17 12:27:45,663 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 294 transitions. [2023-11-17 12:27:45,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 294 transitions. [2023-11-17 12:27:45,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:45,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 294 transitions. [2023-11-17 12:27:45,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 8.4) internal successors, (294), 35 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:45,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 26.0) internal successors, (936), 36 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:45,670 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 26.0) internal successors, (936), 36 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:45,670 INFO L175 Difference]: Start difference. First operand has 119 places, 110 transitions, 1174 flow. Second operand 35 states and 294 transitions. [2023-11-17 12:27:45,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 252 transitions, 2649 flow [2023-11-17 12:27:45,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 252 transitions, 1722 flow, removed 385 selfloop flow, removed 20 redundant places. [2023-11-17 12:27:45,693 INFO L231 Difference]: Finished difference. Result has 139 places, 137 transitions, 1143 flow [2023-11-17 12:27:45,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1143, PETRI_PLACES=139, PETRI_TRANSITIONS=137} [2023-11-17 12:27:45,695 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-11-17 12:27:45,695 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 137 transitions, 1143 flow [2023-11-17 12:27:45,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:45,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:45,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:45,702 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 12:27:45,898 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 12:27:45,898 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 12:27:45,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:45,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1915825400, now seen corresponding path program 12 times [2023-11-17 12:27:45,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:45,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911006587] [2023-11-17 12:27:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:45,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:46,054 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 12:27:46,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:46,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911006587] [2023-11-17 12:27:46,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911006587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:46,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304179655] [2023-11-17 12:27:46,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:27:46,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:46,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:46,077 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 12:27:46,101 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 12:27:46,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:27:46,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:46,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:46,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:46,310 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 12:27:46,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:46,505 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 12:27:46,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304179655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:46,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:46,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:46,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984733864] [2023-11-17 12:27:46,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:46,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:46,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:46,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:46,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 137 transitions, 1143 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:46,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:46,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:46,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:47,359 INFO L124 PetriNetUnfolderBase]: 337/686 cut-off events. [2023-11-17 12:27:47,359 INFO L125 PetriNetUnfolderBase]: For 2045/2045 co-relation queries the response was YES. [2023-11-17 12:27:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2973 conditions, 686 events. 337/686 cut-off events. For 2045/2045 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3460 event pairs, 22 based on Foata normal form. 2/688 useless extension candidates. Maximal degree in co-relation 2844. Up to 278 conditions per place. [2023-11-17 12:27:47,363 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 109 selfloop transitions, 100 changer transitions 23/232 dead transitions. [2023-11-17 12:27:47,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 232 transitions, 1993 flow [2023-11-17 12:27:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:27:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:27:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 260 transitions. [2023-11-17 12:27:47,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 12:27:47,365 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 260 transitions. [2023-11-17 12:27:47,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 260 transitions. [2023-11-17 12:27:47,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:47,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 260 transitions. [2023-11-17 12:27:47,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 8.125) internal successors, (260), 32 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:47,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:47,368 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:47,368 INFO L175 Difference]: Start difference. First operand has 139 places, 137 transitions, 1143 flow. Second operand 32 states and 260 transitions. [2023-11-17 12:27:47,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 232 transitions, 1993 flow [2023-11-17 12:27:47,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 232 transitions, 1814 flow, removed 59 selfloop flow, removed 15 redundant places. [2023-11-17 12:27:47,383 INFO L231 Difference]: Finished difference. Result has 155 places, 139 transitions, 1275 flow [2023-11-17 12:27:47,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1275, PETRI_PLACES=155, PETRI_TRANSITIONS=139} [2023-11-17 12:27:47,383 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-11-17 12:27:47,383 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 139 transitions, 1275 flow [2023-11-17 12:27:47,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:47,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:47,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:47,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 12:27:47,588 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 12:27:47,588 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 12:27:47,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1024513940, now seen corresponding path program 13 times [2023-11-17 12:27:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:47,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237164507] [2023-11-17 12:27:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:47,718 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 12:27:47,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:47,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237164507] [2023-11-17 12:27:47,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237164507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:47,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744695595] [2023-11-17 12:27:47,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:27:47,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:47,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:47,719 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 12:27:47,723 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 12:27:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:47,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:47,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:47,931 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 12:27:47,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:48,196 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 12:27:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744695595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:48,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011172709] [2023-11-17 12:27:48,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:48,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:48,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 139 transitions, 1275 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:48,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:48,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:48,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:49,343 INFO L124 PetriNetUnfolderBase]: 512/1040 cut-off events. [2023-11-17 12:27:49,344 INFO L125 PetriNetUnfolderBase]: For 3864/3864 co-relation queries the response was YES. [2023-11-17 12:27:49,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4816 conditions, 1040 events. 512/1040 cut-off events. For 3864/3864 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5885 event pairs, 50 based on Foata normal form. 6/1042 useless extension candidates. Maximal degree in co-relation 4665. Up to 424 conditions per place. [2023-11-17 12:27:49,350 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 161 selfloop transitions, 135 changer transitions 40/336 dead transitions. [2023-11-17 12:27:49,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 336 transitions, 3102 flow [2023-11-17 12:27:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 12:27:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 12:27:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 379 transitions. [2023-11-17 12:27:49,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29748822605965464 [2023-11-17 12:27:49,354 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 379 transitions. [2023-11-17 12:27:49,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 379 transitions. [2023-11-17 12:27:49,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:49,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 379 transitions. [2023-11-17 12:27:49,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 7.73469387755102) internal successors, (379), 49 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:49,361 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 12:27:49,361 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 12:27:49,361 INFO L175 Difference]: Start difference. First operand has 155 places, 139 transitions, 1275 flow. Second operand 49 states and 379 transitions. [2023-11-17 12:27:49,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 336 transitions, 3102 flow [2023-11-17 12:27:49,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 336 transitions, 2845 flow, removed 28 selfloop flow, removed 21 redundant places. [2023-11-17 12:27:49,380 INFO L231 Difference]: Finished difference. Result has 196 places, 204 transitions, 2071 flow [2023-11-17 12:27:49,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2071, PETRI_PLACES=196, PETRI_TRANSITIONS=204} [2023-11-17 12:27:49,380 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2023-11-17 12:27:49,381 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 204 transitions, 2071 flow [2023-11-17 12:27:49,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:49,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:49,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:49,385 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 12:27:49,586 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 12:27:49,586 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 12:27:49,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:49,586 INFO L85 PathProgramCache]: Analyzing trace with hash 824627518, now seen corresponding path program 14 times [2023-11-17 12:27:49,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:49,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126868079] [2023-11-17 12:27:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:49,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:49,741 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 12:27:49,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:49,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126868079] [2023-11-17 12:27:49,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126868079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067187812] [2023-11-17 12:27:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:27:49,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:49,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:49,752 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 12:27:49,779 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 12:27:49,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:49,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:49,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:49,991 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 12:27:49,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:50,287 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 12:27:50,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067187812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:50,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:50,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:50,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138084904] [2023-11-17 12:27:50,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:50,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:50,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:50,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 204 transitions, 2071 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:50,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:50,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:50,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:51,144 INFO L124 PetriNetUnfolderBase]: 561/1149 cut-off events. [2023-11-17 12:27:51,145 INFO L125 PetriNetUnfolderBase]: For 8732/8732 co-relation queries the response was YES. [2023-11-17 12:27:51,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6116 conditions, 1149 events. 561/1149 cut-off events. For 8732/8732 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6776 event pairs, 66 based on Foata normal form. 3/1148 useless extension candidates. Maximal degree in co-relation 5908. Up to 768 conditions per place. [2023-11-17 12:27:51,154 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 193 selfloop transitions, 111 changer transitions 15/319 dead transitions. [2023-11-17 12:27:51,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 319 transitions, 3449 flow [2023-11-17 12:27:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:27:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:27:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 252 transitions. [2023-11-17 12:27:51,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30288461538461536 [2023-11-17 12:27:51,156 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 252 transitions. [2023-11-17 12:27:51,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 252 transitions. [2023-11-17 12:27:51,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:51,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 252 transitions. [2023-11-17 12:27:51,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 7.875) internal successors, (252), 32 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:51,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:51,158 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:51,158 INFO L175 Difference]: Start difference. First operand has 196 places, 204 transitions, 2071 flow. Second operand 32 states and 252 transitions. [2023-11-17 12:27:51,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 319 transitions, 3449 flow [2023-11-17 12:27:51,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 319 transitions, 2886 flow, removed 223 selfloop flow, removed 23 redundant places. [2023-11-17 12:27:51,205 INFO L231 Difference]: Finished difference. Result has 212 places, 237 transitions, 2308 flow [2023-11-17 12:27:51,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2308, PETRI_PLACES=212, PETRI_TRANSITIONS=237} [2023-11-17 12:27:51,206 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2023-11-17 12:27:51,206 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 237 transitions, 2308 flow [2023-11-17 12:27:51,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:51,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:51,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:51,210 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 12:27:51,410 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 12:27:51,410 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 12:27:51,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash -885985790, now seen corresponding path program 15 times [2023-11-17 12:27:51,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:51,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938027881] [2023-11-17 12:27:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:51,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:51,556 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 12:27:51,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:51,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938027881] [2023-11-17 12:27:51,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938027881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:51,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740020637] [2023-11-17 12:27:51,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:27:51,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:51,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:51,558 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 12:27:51,586 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 12:27:51,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:27:51,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:51,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:51,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:51,793 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 12:27:51,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:52,025 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 12:27:52,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740020637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:52,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:52,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:52,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955669932] [2023-11-17 12:27:52,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:52,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:52,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:52,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:52,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 237 transitions, 2308 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:52,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:52,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:52,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:52,729 INFO L124 PetriNetUnfolderBase]: 558/1127 cut-off events. [2023-11-17 12:27:52,730 INFO L125 PetriNetUnfolderBase]: For 6547/6547 co-relation queries the response was YES. [2023-11-17 12:27:52,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5746 conditions, 1127 events. 558/1127 cut-off events. For 6547/6547 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6502 event pairs, 66 based on Foata normal form. 4/1125 useless extension candidates. Maximal degree in co-relation 5687. Up to 552 conditions per place. [2023-11-17 12:27:52,740 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 145 selfloop transitions, 155 changer transitions 16/316 dead transitions. [2023-11-17 12:27:52,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 316 transitions, 3327 flow [2023-11-17 12:27:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:27:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:27:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 250 transitions. [2023-11-17 12:27:52,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3004807692307692 [2023-11-17 12:27:52,742 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 250 transitions. [2023-11-17 12:27:52,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 250 transitions. [2023-11-17 12:27:52,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:52,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 250 transitions. [2023-11-17 12:27:52,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 7.8125) internal successors, (250), 32 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:52,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:52,745 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:52,745 INFO L175 Difference]: Start difference. First operand has 212 places, 237 transitions, 2308 flow. Second operand 32 states and 250 transitions. [2023-11-17 12:27:52,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 316 transitions, 3327 flow [2023-11-17 12:27:52,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 316 transitions, 3102 flow, removed 54 selfloop flow, removed 17 redundant places. [2023-11-17 12:27:52,782 INFO L231 Difference]: Finished difference. Result has 228 places, 244 transitions, 2654 flow [2023-11-17 12:27:52,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2654, PETRI_PLACES=228, PETRI_TRANSITIONS=244} [2023-11-17 12:27:52,783 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-11-17 12:27:52,783 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 244 transitions, 2654 flow [2023-11-17 12:27:52,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:52,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:52,783 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:52,801 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 12:27:52,988 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 12:27:52,988 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 12:27:52,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:52,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1743671028, now seen corresponding path program 16 times [2023-11-17 12:27:52,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:52,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941222948] [2023-11-17 12:27:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:52,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:53,125 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 12:27:53,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941222948] [2023-11-17 12:27:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941222948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92990454] [2023-11-17 12:27:53,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:27:53,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:53,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:53,126 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 12:27:53,150 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 12:27:53,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:27:53,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:53,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:53,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:53,319 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 12:27:53,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:53,586 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 12:27:53,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92990454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:53,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:53,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:53,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535763936] [2023-11-17 12:27:53,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:53,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:53,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:53,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:53,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:53,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:53,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 244 transitions, 2654 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:53,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:53,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:53,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:54,122 INFO L124 PetriNetUnfolderBase]: 558/1115 cut-off events. [2023-11-17 12:27:54,122 INFO L125 PetriNetUnfolderBase]: For 7155/7155 co-relation queries the response was YES. [2023-11-17 12:27:54,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5966 conditions, 1115 events. 558/1115 cut-off events. For 7155/7155 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6345 event pairs, 68 based on Foata normal form. 8/1123 useless extension candidates. Maximal degree in co-relation 5833. Up to 665 conditions per place. [2023-11-17 12:27:54,131 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 138 selfloop transitions, 91 changer transitions 66/295 dead transitions. [2023-11-17 12:27:54,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 295 transitions, 3401 flow [2023-11-17 12:27:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:27:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:27:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 190 transitions. [2023-11-17 12:27:54,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28106508875739644 [2023-11-17 12:27:54,132 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 190 transitions. [2023-11-17 12:27:54,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 190 transitions. [2023-11-17 12:27:54,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:54,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 190 transitions. [2023-11-17 12:27:54,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 26 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 12:27:54,133 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 12:27:54,134 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 12:27:54,134 INFO L175 Difference]: Start difference. First operand has 228 places, 244 transitions, 2654 flow. Second operand 26 states and 190 transitions. [2023-11-17 12:27:54,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 295 transitions, 3401 flow [2023-11-17 12:27:54,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 295 transitions, 3125 flow, removed 60 selfloop flow, removed 21 redundant places. [2023-11-17 12:27:54,181 INFO L231 Difference]: Finished difference. Result has 232 places, 199 transitions, 2110 flow [2023-11-17 12:27:54,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2110, PETRI_PLACES=232, PETRI_TRANSITIONS=199} [2023-11-17 12:27:54,181 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-11-17 12:27:54,182 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 199 transitions, 2110 flow [2023-11-17 12:27:54,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:54,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:54,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:54,189 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 12:27:54,386 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 12:27:54,386 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 12:27:54,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2084089982, now seen corresponding path program 17 times [2023-11-17 12:27:54,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:54,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221882083] [2023-11-17 12:27:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:54,528 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 12:27:54,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:54,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221882083] [2023-11-17 12:27:54,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221882083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:54,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13638590] [2023-11-17 12:27:54,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:27:54,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:54,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:54,529 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 12:27:54,534 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 12:27:54,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:54,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:54,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:54,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:54,767 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 12:27:54,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:55,044 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 12:27:55,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13638590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:55,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:55,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:55,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694207038] [2023-11-17 12:27:55,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:55,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:55,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:55,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:55,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:55,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:55,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 199 transitions, 2110 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:55,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:55,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:55,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:55,797 INFO L124 PetriNetUnfolderBase]: 536/1067 cut-off events. [2023-11-17 12:27:55,798 INFO L125 PetriNetUnfolderBase]: For 5072/5072 co-relation queries the response was YES. [2023-11-17 12:27:55,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5573 conditions, 1067 events. 536/1067 cut-off events. For 5072/5072 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5993 event pairs, 80 based on Foata normal form. 4/1071 useless extension candidates. Maximal degree in co-relation 5517. Up to 826 conditions per place. [2023-11-17 12:27:55,811 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 209 selfloop transitions, 51 changer transitions 25/285 dead transitions. [2023-11-17 12:27:55,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 285 transitions, 3089 flow [2023-11-17 12:27:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:27:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:27:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 217 transitions. [2023-11-17 12:27:55,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2980769230769231 [2023-11-17 12:27:55,813 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 217 transitions. [2023-11-17 12:27:55,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 217 transitions. [2023-11-17 12:27:55,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:55,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 217 transitions. [2023-11-17 12:27:55,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 7.75) internal successors, (217), 28 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:55,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 26.0) internal successors, (754), 29 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:55,816 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 26.0) internal successors, (754), 29 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:55,816 INFO L175 Difference]: Start difference. First operand has 232 places, 199 transitions, 2110 flow. Second operand 28 states and 217 transitions. [2023-11-17 12:27:55,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 285 transitions, 3089 flow [2023-11-17 12:27:55,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 285 transitions, 2750 flow, removed 33 selfloop flow, removed 33 redundant places. [2023-11-17 12:27:55,846 INFO L231 Difference]: Finished difference. Result has 207 places, 208 transitions, 2041 flow [2023-11-17 12:27:55,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2041, PETRI_PLACES=207, PETRI_TRANSITIONS=208} [2023-11-17 12:27:55,847 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 187 predicate places. [2023-11-17 12:27:55,847 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 208 transitions, 2041 flow [2023-11-17 12:27:55,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:55,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:55,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:55,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 12:27:56,051 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 12:27:56,051 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 12:27:56,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:56,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1706248882, now seen corresponding path program 18 times [2023-11-17 12:27:56,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:56,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829154520] [2023-11-17 12:27:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:56,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:56,198 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 12:27:56,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:56,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829154520] [2023-11-17 12:27:56,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829154520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:56,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003681037] [2023-11-17 12:27:56,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:27:56,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:56,213 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 12:27:56,214 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 12:27:56,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:27:56,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:56,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:56,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:56,479 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 12:27:56,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:56,775 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 12:27:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003681037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:56,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750866211] [2023-11-17 12:27:56,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:56,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:56,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:56,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:56,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 208 transitions, 2041 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:56,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:56,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:56,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:57,392 INFO L124 PetriNetUnfolderBase]: 535/1069 cut-off events. [2023-11-17 12:27:57,392 INFO L125 PetriNetUnfolderBase]: For 5215/5215 co-relation queries the response was YES. [2023-11-17 12:27:57,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5504 conditions, 1069 events. 535/1069 cut-off events. For 5215/5215 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5999 event pairs, 88 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 5447. Up to 839 conditions per place. [2023-11-17 12:27:57,400 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 207 selfloop transitions, 44 changer transitions 19/270 dead transitions. [2023-11-17 12:27:57,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 270 transitions, 2889 flow [2023-11-17 12:27:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:27:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:27:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 165 transitions. [2023-11-17 12:27:57,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3173076923076923 [2023-11-17 12:27:57,401 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 165 transitions. [2023-11-17 12:27:57,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 165 transitions. [2023-11-17 12:27:57,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:57,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 165 transitions. [2023-11-17 12:27:57,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.25) internal successors, (165), 20 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:57,402 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 12:27:57,402 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 12:27:57,402 INFO L175 Difference]: Start difference. First operand has 207 places, 208 transitions, 2041 flow. Second operand 20 states and 165 transitions. [2023-11-17 12:27:57,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 270 transitions, 2889 flow [2023-11-17 12:27:57,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 270 transitions, 2735 flow, removed 30 selfloop flow, removed 19 redundant places. [2023-11-17 12:27:57,430 INFO L231 Difference]: Finished difference. Result has 209 places, 208 transitions, 2042 flow [2023-11-17 12:27:57,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2042, PETRI_PLACES=209, PETRI_TRANSITIONS=208} [2023-11-17 12:27:57,431 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-17 12:27:57,431 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 208 transitions, 2042 flow [2023-11-17 12:27:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:57,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:57,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:57,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:27:57,635 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 12:27:57,636 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 12:27:57,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1944976866, now seen corresponding path program 19 times [2023-11-17 12:27:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:57,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688581548] [2023-11-17 12:27:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:57,816 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 12:27:57,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688581548] [2023-11-17 12:27:57,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688581548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999182893] [2023-11-17 12:27:57,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:27:57,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:57,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:57,834 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 12:27:57,876 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 12:27:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:57,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:57,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:58,080 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 12:27:58,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:27:58,360 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 12:27:58,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999182893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:27:58,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:27:58,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:27:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388091379] [2023-11-17 12:27:58,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:27:58,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:27:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:27:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:27:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:27:58,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:27:58,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 208 transitions, 2042 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:58,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:27:58,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:27:58,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:27:59,269 INFO L124 PetriNetUnfolderBase]: 561/1127 cut-off events. [2023-11-17 12:27:59,270 INFO L125 PetriNetUnfolderBase]: For 5918/5918 co-relation queries the response was YES. [2023-11-17 12:27:59,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5890 conditions, 1127 events. 561/1127 cut-off events. For 5918/5918 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6455 event pairs, 94 based on Foata normal form. 3/1128 useless extension candidates. Maximal degree in co-relation 5832. Up to 877 conditions per place. [2023-11-17 12:27:59,276 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 225 selfloop transitions, 57 changer transitions 15/297 dead transitions. [2023-11-17 12:27:59,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 297 transitions, 3167 flow [2023-11-17 12:27:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:27:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:27:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 211 transitions. [2023-11-17 12:27:59,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3005698005698006 [2023-11-17 12:27:59,277 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 211 transitions. [2023-11-17 12:27:59,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 211 transitions. [2023-11-17 12:27:59,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:27:59,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 211 transitions. [2023-11-17 12:27:59,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.814814814814815) internal successors, (211), 27 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:59,284 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 12:27:59,284 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 12:27:59,284 INFO L175 Difference]: Start difference. First operand has 209 places, 208 transitions, 2042 flow. Second operand 27 states and 211 transitions. [2023-11-17 12:27:59,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 297 transitions, 3167 flow [2023-11-17 12:27:59,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 297 transitions, 2962 flow, removed 31 selfloop flow, removed 22 redundant places. [2023-11-17 12:27:59,313 INFO L231 Difference]: Finished difference. Result has 219 places, 226 transitions, 2294 flow [2023-11-17 12:27:59,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2294, PETRI_PLACES=219, PETRI_TRANSITIONS=226} [2023-11-17 12:27:59,313 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-11-17 12:27:59,313 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 226 transitions, 2294 flow [2023-11-17 12:27:59,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:27:59,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:27:59,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:27:59,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-17 12:27:59,518 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 12:27:59,518 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 12:27:59,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:27:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash -623321680, now seen corresponding path program 20 times [2023-11-17 12:27:59,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:27:59,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927232585] [2023-11-17 12:27:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:27:59,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:27:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:27:59,624 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 12:27:59,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:27:59,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927232585] [2023-11-17 12:27:59,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927232585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:27:59,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152488688] [2023-11-17 12:27:59,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:27:59,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:27:59,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:27:59,626 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 12:27:59,630 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 12:27:59,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:27:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:27:59,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:27:59,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:27:59,837 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 12:27:59,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:00,060 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 12:28:00,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152488688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:00,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:00,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:28:00,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798185380] [2023-11-17 12:28:00,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:00,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:00,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:00,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:00,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:00,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 226 transitions, 2294 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:00,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:00,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:00,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:00,523 INFO L124 PetriNetUnfolderBase]: 582/1162 cut-off events. [2023-11-17 12:28:00,523 INFO L125 PetriNetUnfolderBase]: For 6962/6962 co-relation queries the response was YES. [2023-11-17 12:28:00,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6260 conditions, 1162 events. 582/1162 cut-off events. For 6962/6962 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6647 event pairs, 102 based on Foata normal form. 3/1163 useless extension candidates. Maximal degree in co-relation 6201. Up to 970 conditions per place. [2023-11-17 12:28:00,531 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 207 selfloop transitions, 40 changer transitions 34/281 dead transitions. [2023-11-17 12:28:00,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 281 transitions, 3213 flow [2023-11-17 12:28:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:28:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:28:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 143 transitions. [2023-11-17 12:28:00,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.275 [2023-11-17 12:28:00,532 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 143 transitions. [2023-11-17 12:28:00,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 143 transitions. [2023-11-17 12:28:00,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:00,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 143 transitions. [2023-11-17 12:28:00,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.15) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:00,533 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 12:28:00,533 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 12:28:00,533 INFO L175 Difference]: Start difference. First operand has 219 places, 226 transitions, 2294 flow. Second operand 20 states and 143 transitions. [2023-11-17 12:28:00,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 281 transitions, 3213 flow [2023-11-17 12:28:00,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 281 transitions, 2971 flow, removed 93 selfloop flow, removed 15 redundant places. [2023-11-17 12:28:00,564 INFO L231 Difference]: Finished difference. Result has 227 places, 225 transitions, 2192 flow [2023-11-17 12:28:00,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2192, PETRI_PLACES=227, PETRI_TRANSITIONS=225} [2023-11-17 12:28:00,564 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2023-11-17 12:28:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 225 transitions, 2192 flow [2023-11-17 12:28:00,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:00,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:00,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:00,569 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 12:28:00,769 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 12:28:00,769 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 12:28:00,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash 101197788, now seen corresponding path program 21 times [2023-11-17 12:28:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:00,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509805130] [2023-11-17 12:28:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:00,896 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 12:28:00,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:00,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509805130] [2023-11-17 12:28:00,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509805130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:00,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590308889] [2023-11-17 12:28:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:28:00,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:00,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:00,913 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 12:28:00,917 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 12:28:00,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:28:00,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:00,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:28:00,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:01,142 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 12:28:01,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:01,393 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 12:28:01,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590308889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:01,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:01,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:28:01,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477966332] [2023-11-17 12:28:01,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:01,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:01,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:01,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 225 transitions, 2192 flow. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 12:28:01,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:01,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:01,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:02,172 INFO L124 PetriNetUnfolderBase]: 643/1288 cut-off events. [2023-11-17 12:28:02,172 INFO L125 PetriNetUnfolderBase]: For 10083/10083 co-relation queries the response was YES. [2023-11-17 12:28:02,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7240 conditions, 1288 events. 643/1288 cut-off events. For 10083/10083 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7634 event pairs, 102 based on Foata normal form. 6/1292 useless extension candidates. Maximal degree in co-relation 7176. Up to 940 conditions per place. [2023-11-17 12:28:02,182 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 226 selfloop transitions, 76 changer transitions 32/334 dead transitions. [2023-11-17 12:28:02,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 334 transitions, 3883 flow [2023-11-17 12:28:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:28:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:28:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 241 transitions. [2023-11-17 12:28:02,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2990074441687345 [2023-11-17 12:28:02,183 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 241 transitions. [2023-11-17 12:28:02,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 241 transitions. [2023-11-17 12:28:02,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:02,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 241 transitions. [2023-11-17 12:28:02,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.774193548387097) internal successors, (241), 31 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:02,184 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 12:28:02,184 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 12:28:02,185 INFO L175 Difference]: Start difference. First operand has 227 places, 225 transitions, 2192 flow. Second operand 31 states and 241 transitions. [2023-11-17 12:28:02,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 334 transitions, 3883 flow [2023-11-17 12:28:02,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 334 transitions, 3548 flow, removed 139 selfloop flow, removed 17 redundant places. [2023-11-17 12:28:02,225 INFO L231 Difference]: Finished difference. Result has 237 places, 252 transitions, 2718 flow [2023-11-17 12:28:02,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2718, PETRI_PLACES=237, PETRI_TRANSITIONS=252} [2023-11-17 12:28:02,226 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-11-17 12:28:02,226 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 252 transitions, 2718 flow [2023-11-17 12:28:02,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 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 12:28:02,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:02,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:02,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:02,430 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 12:28:02,431 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 12:28:02,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash 234363558, now seen corresponding path program 22 times [2023-11-17 12:28:02,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:02,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417579299] [2023-11-17 12:28:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:02,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:02,546 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 12:28:02,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:02,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417579299] [2023-11-17 12:28:02,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417579299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:02,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886762338] [2023-11-17 12:28:02,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:28:02,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:02,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:02,566 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 12:28:02,591 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 12:28:02,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:28:02,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:02,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 12:28:02,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:02,764 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 12:28:02,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:02,948 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 12:28:02,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886762338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:02,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:02,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 12:28:02,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476362288] [2023-11-17 12:28:02,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:02,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:02,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:02,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 252 transitions, 2718 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:02,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:03,811 INFO L124 PetriNetUnfolderBase]: 640/1335 cut-off events. [2023-11-17 12:28:03,812 INFO L125 PetriNetUnfolderBase]: For 13064/13064 co-relation queries the response was YES. [2023-11-17 12:28:03,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7886 conditions, 1335 events. 640/1335 cut-off events. For 13064/13064 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8290 event pairs, 53 based on Foata normal form. 4/1335 useless extension candidates. Maximal degree in co-relation 7818. Up to 730 conditions per place. [2023-11-17 12:28:03,822 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 218 selfloop transitions, 105 changer transitions 25/348 dead transitions. [2023-11-17 12:28:03,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 348 transitions, 4114 flow [2023-11-17 12:28:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:28:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:28:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 238 transitions. [2023-11-17 12:28:03,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29528535980148884 [2023-11-17 12:28:03,830 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 238 transitions. [2023-11-17 12:28:03,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 238 transitions. [2023-11-17 12:28:03,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:03,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 238 transitions. [2023-11-17 12:28:03,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 7.67741935483871) internal successors, (238), 31 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:03,832 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 12:28:03,832 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 12:28:03,832 INFO L175 Difference]: Start difference. First operand has 237 places, 252 transitions, 2718 flow. Second operand 31 states and 238 transitions. [2023-11-17 12:28:03,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 348 transitions, 4114 flow [2023-11-17 12:28:03,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 348 transitions, 3669 flow, removed 192 selfloop flow, removed 14 redundant places. [2023-11-17 12:28:03,885 INFO L231 Difference]: Finished difference. Result has 249 places, 261 transitions, 2879 flow [2023-11-17 12:28:03,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2879, PETRI_PLACES=249, PETRI_TRANSITIONS=261} [2023-11-17 12:28:03,886 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2023-11-17 12:28:03,886 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 261 transitions, 2879 flow [2023-11-17 12:28:03,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:03,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:03,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:03,901 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 12:28:04,091 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 12:28:04,091 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 12:28:04,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:04,091 INFO L85 PathProgramCache]: Analyzing trace with hash -281969952, now seen corresponding path program 23 times [2023-11-17 12:28:04,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:04,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966216287] [2023-11-17 12:28:04,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:04,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:04,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:04,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966216287] [2023-11-17 12:28:04,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966216287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:04,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000710236] [2023-11-17 12:28:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:28:04,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:04,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:04,233 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 12:28:04,234 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 12:28:04,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:28:04,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:04,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:28:04,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:04,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:04,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000710236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:04,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:04,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-11-17 12:28:04,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723475805] [2023-11-17 12:28:04,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:04,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:28:04,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:04,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:28:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:28:04,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:04,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 261 transitions, 2879 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:04,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:04,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:04,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:05,607 INFO L124 PetriNetUnfolderBase]: 749/1525 cut-off events. [2023-11-17 12:28:05,607 INFO L125 PetriNetUnfolderBase]: For 14831/14831 co-relation queries the response was YES. [2023-11-17 12:28:05,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8918 conditions, 1525 events. 749/1525 cut-off events. For 14831/14831 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9596 event pairs, 52 based on Foata normal form. 3/1524 useless extension candidates. Maximal degree in co-relation 8849. Up to 1028 conditions per place. [2023-11-17 12:28:05,618 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 243 selfloop transitions, 134 changer transitions 11/388 dead transitions. [2023-11-17 12:28:05,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 388 transitions, 4532 flow [2023-11-17 12:28:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:28:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:28:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 236 transitions. [2023-11-17 12:28:05,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129973474801061 [2023-11-17 12:28:05,632 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 236 transitions. [2023-11-17 12:28:05,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 236 transitions. [2023-11-17 12:28:05,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:05,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 236 transitions. [2023-11-17 12:28:05,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.137931034482758) internal successors, (236), 29 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:05,634 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 12:28:05,634 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 12:28:05,634 INFO L175 Difference]: Start difference. First operand has 249 places, 261 transitions, 2879 flow. Second operand 29 states and 236 transitions. [2023-11-17 12:28:05,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 388 transitions, 4532 flow [2023-11-17 12:28:05,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 388 transitions, 4007 flow, removed 181 selfloop flow, removed 22 redundant places. [2023-11-17 12:28:05,711 INFO L231 Difference]: Finished difference. Result has 255 places, 304 transitions, 3259 flow [2023-11-17 12:28:05,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3259, PETRI_PLACES=255, PETRI_TRANSITIONS=304} [2023-11-17 12:28:05,711 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 235 predicate places. [2023-11-17 12:28:05,711 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 304 transitions, 3259 flow [2023-11-17 12:28:05,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:05,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:05,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:05,732 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 12:28:05,916 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 12:28:05,916 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 12:28:05,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1178551070, now seen corresponding path program 24 times [2023-11-17 12:28:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:05,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019527731] [2023-11-17 12:28:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:06,065 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 12:28:06,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:06,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019527731] [2023-11-17 12:28:06,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019527731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:06,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6648826] [2023-11-17 12:28:06,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:28:06,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:06,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:06,066 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 12:28:06,100 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 12:28:06,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:28:06,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:06,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:06,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:06,266 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 12:28:06,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:06,416 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 12:28:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6648826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:06,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:06,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 12:28:06,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75093929] [2023-11-17 12:28:06,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:28:06,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:28:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:28:06,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:06,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 304 transitions, 3259 flow. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 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 12:28:06,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:06,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:06,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:07,014 INFO L124 PetriNetUnfolderBase]: 812/1655 cut-off events. [2023-11-17 12:28:07,014 INFO L125 PetriNetUnfolderBase]: For 13340/13340 co-relation queries the response was YES. [2023-11-17 12:28:07,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9586 conditions, 1655 events. 812/1655 cut-off events. For 13340/13340 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 10737 event pairs, 18 based on Foata normal form. 8/1653 useless extension candidates. Maximal degree in co-relation 9518. Up to 555 conditions per place. [2023-11-17 12:28:07,025 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 180 selfloop transitions, 170 changer transitions 60/410 dead transitions. [2023-11-17 12:28:07,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 410 transitions, 4861 flow [2023-11-17 12:28:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:28:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:28:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 233 transitions. [2023-11-17 12:28:07,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3319088319088319 [2023-11-17 12:28:07,034 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 233 transitions. [2023-11-17 12:28:07,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 233 transitions. [2023-11-17 12:28:07,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:07,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 233 transitions. [2023-11-17 12:28:07,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 8.62962962962963) internal successors, (233), 27 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:07,035 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 12:28:07,035 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 12:28:07,035 INFO L175 Difference]: Start difference. First operand has 255 places, 304 transitions, 3259 flow. Second operand 27 states and 233 transitions. [2023-11-17 12:28:07,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 410 transitions, 4861 flow [2023-11-17 12:28:07,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 410 transitions, 4728 flow, removed 20 selfloop flow, removed 13 redundant places. [2023-11-17 12:28:07,117 INFO L231 Difference]: Finished difference. Result has 274 places, 297 transitions, 3606 flow [2023-11-17 12:28:07,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3128, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3606, PETRI_PLACES=274, PETRI_TRANSITIONS=297} [2023-11-17 12:28:07,118 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 254 predicate places. [2023-11-17 12:28:07,118 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 297 transitions, 3606 flow [2023-11-17 12:28:07,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 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 12:28:07,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:07,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:07,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:07,322 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 12:28:07,323 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 12:28:07,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:07,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1346090906, now seen corresponding path program 25 times [2023-11-17 12:28:07,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:07,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132366952] [2023-11-17 12:28:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:07,497 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 12:28:07,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:07,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132366952] [2023-11-17 12:28:07,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132366952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:07,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556358913] [2023-11-17 12:28:07,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:28:07,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:07,507 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 12:28:07,509 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 12:28:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:07,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:07,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:07,705 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 12:28:07,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:07,861 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 12:28:07,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556358913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:07,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:07,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 12:28:07,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703949524] [2023-11-17 12:28:07,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:07,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:28:07,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:07,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:28:07,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:28:07,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:07,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 297 transitions, 3606 flow. Second operand has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 26 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 12:28:07,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:07,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:07,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:08,649 INFO L124 PetriNetUnfolderBase]: 829/1724 cut-off events. [2023-11-17 12:28:08,649 INFO L125 PetriNetUnfolderBase]: For 22976/22976 co-relation queries the response was YES. [2023-11-17 12:28:08,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11426 conditions, 1724 events. 829/1724 cut-off events. For 22976/22976 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11363 event pairs, 22 based on Foata normal form. 3/1723 useless extension candidates. Maximal degree in co-relation 11349. Up to 557 conditions per place. [2023-11-17 12:28:08,687 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 201 selfloop transitions, 192 changer transitions 22/415 dead transitions. [2023-11-17 12:28:08,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 415 transitions, 5640 flow [2023-11-17 12:28:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:28:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:28:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 236 transitions. [2023-11-17 12:28:08,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33618233618233617 [2023-11-17 12:28:08,688 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 236 transitions. [2023-11-17 12:28:08,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 236 transitions. [2023-11-17 12:28:08,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:08,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 236 transitions. [2023-11-17 12:28:08,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 8.74074074074074) internal successors, (236), 27 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:08,690 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 12:28:08,690 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 12:28:08,690 INFO L175 Difference]: Start difference. First operand has 274 places, 297 transitions, 3606 flow. Second operand 27 states and 236 transitions. [2023-11-17 12:28:08,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 415 transitions, 5640 flow [2023-11-17 12:28:08,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 415 transitions, 5200 flow, removed 104 selfloop flow, removed 21 redundant places. [2023-11-17 12:28:08,790 INFO L231 Difference]: Finished difference. Result has 269 places, 317 transitions, 4215 flow [2023-11-17 12:28:08,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4215, PETRI_PLACES=269, PETRI_TRANSITIONS=317} [2023-11-17 12:28:08,791 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 249 predicate places. [2023-11-17 12:28:08,791 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 317 transitions, 4215 flow [2023-11-17 12:28:08,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 26 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 12:28:08,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:08,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:08,798 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 12:28:08,995 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 12:28:08,996 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 12:28:08,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1207562756, now seen corresponding path program 26 times [2023-11-17 12:28:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:08,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780113943] [2023-11-17 12:28:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:09,163 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 12:28:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780113943] [2023-11-17 12:28:09,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780113943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282698289] [2023-11-17 12:28:09,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:28:09,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:09,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:09,165 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 12:28:09,166 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 12:28:09,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:09,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:09,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:09,362 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 12:28:09,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:09,505 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 12:28:09,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282698289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:09,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:09,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 12:28:09,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128468684] [2023-11-17 12:28:09,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:09,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:28:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:28:09,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:28:09,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:09,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 317 transitions, 4215 flow. Second operand has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 26 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 12:28:09,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:09,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:09,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:10,263 INFO L124 PetriNetUnfolderBase]: 782/1630 cut-off events. [2023-11-17 12:28:10,263 INFO L125 PetriNetUnfolderBase]: For 20643/20643 co-relation queries the response was YES. [2023-11-17 12:28:10,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11013 conditions, 1630 events. 782/1630 cut-off events. For 20643/20643 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10626 event pairs, 20 based on Foata normal form. 4/1630 useless extension candidates. Maximal degree in co-relation 10936. Up to 557 conditions per place. [2023-11-17 12:28:10,276 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 182 selfloop transitions, 193 changer transitions 12/387 dead transitions. [2023-11-17 12:28:10,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 387 transitions, 5428 flow [2023-11-17 12:28:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:28:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:28:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 213 transitions. [2023-11-17 12:28:10,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3150887573964497 [2023-11-17 12:28:10,277 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 213 transitions. [2023-11-17 12:28:10,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 213 transitions. [2023-11-17 12:28:10,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:10,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 213 transitions. [2023-11-17 12:28:10,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 8.192307692307692) internal successors, (213), 26 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:10,279 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 12:28:10,279 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 12:28:10,279 INFO L175 Difference]: Start difference. First operand has 269 places, 317 transitions, 4215 flow. Second operand 26 states and 213 transitions. [2023-11-17 12:28:10,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 387 transitions, 5428 flow [2023-11-17 12:28:10,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 387 transitions, 5065 flow, removed 91 selfloop flow, removed 18 redundant places. [2023-11-17 12:28:10,417 INFO L231 Difference]: Finished difference. Result has 280 places, 317 transitions, 4388 flow [2023-11-17 12:28:10,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4388, PETRI_PLACES=280, PETRI_TRANSITIONS=317} [2023-11-17 12:28:10,421 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 260 predicate places. [2023-11-17 12:28:10,421 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 317 transitions, 4388 flow [2023-11-17 12:28:10,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.576923076923077) internal successors, (119), 26 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 12:28:10,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:10,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:10,425 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 12:28:10,625 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 12:28:10,625 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 12:28:10,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash -591526838, now seen corresponding path program 27 times [2023-11-17 12:28:10,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:10,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481525429] [2023-11-17 12:28:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:10,786 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 12:28:10,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:10,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481525429] [2023-11-17 12:28:10,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481525429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:10,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319468426] [2023-11-17 12:28:10,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:28:10,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:10,788 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 12:28:10,790 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 12:28:10,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:28:10,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:10,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:10,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:10,957 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 12:28:10,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:11,130 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 12:28:11,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319468426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:11,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:11,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 12:28:11,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944213715] [2023-11-17 12:28:11,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:11,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:28:11,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:11,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:28:11,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:28:11,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:11,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 317 transitions, 4388 flow. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 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 12:28:11,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:11,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:11,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:11,661 INFO L124 PetriNetUnfolderBase]: 801/1658 cut-off events. [2023-11-17 12:28:11,661 INFO L125 PetriNetUnfolderBase]: For 22358/22358 co-relation queries the response was YES. [2023-11-17 12:28:11,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11510 conditions, 1658 events. 801/1658 cut-off events. For 22358/22358 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10789 event pairs, 22 based on Foata normal form. 5/1659 useless extension candidates. Maximal degree in co-relation 11429. Up to 557 conditions per place. [2023-11-17 12:28:11,673 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 183 selfloop transitions, 171 changer transitions 53/407 dead transitions. [2023-11-17 12:28:11,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 407 transitions, 5970 flow [2023-11-17 12:28:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:28:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:28:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 207 transitions. [2023-11-17 12:28:11,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31846153846153846 [2023-11-17 12:28:11,678 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 207 transitions. [2023-11-17 12:28:11,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 207 transitions. [2023-11-17 12:28:11,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:11,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 207 transitions. [2023-11-17 12:28:11,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.28) internal successors, (207), 25 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:11,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:11,679 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:11,679 INFO L175 Difference]: Start difference. First operand has 280 places, 317 transitions, 4388 flow. Second operand 25 states and 207 transitions. [2023-11-17 12:28:11,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 407 transitions, 5970 flow [2023-11-17 12:28:11,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 407 transitions, 5429 flow, removed 78 selfloop flow, removed 21 redundant places. [2023-11-17 12:28:11,842 INFO L231 Difference]: Finished difference. Result has 287 places, 304 transitions, 4152 flow [2023-11-17 12:28:11,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4152, PETRI_PLACES=287, PETRI_TRANSITIONS=304} [2023-11-17 12:28:11,843 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 267 predicate places. [2023-11-17 12:28:11,843 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 304 transitions, 4152 flow [2023-11-17 12:28:11,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 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 12:28:11,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:11,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:11,854 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 12:28:12,047 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 12:28:12,047 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 12:28:12,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:12,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1765611096, now seen corresponding path program 28 times [2023-11-17 12:28:12,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:12,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471603632] [2023-11-17 12:28:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:12,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:12,172 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 12:28:12,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:12,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471603632] [2023-11-17 12:28:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471603632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:12,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135476063] [2023-11-17 12:28:12,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:28:12,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:12,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:12,190 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 12:28:12,215 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 12:28:12,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:28:12,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:12,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:12,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:12,374 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 12:28:12,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:12,547 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 12:28:12,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135476063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:12,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:12,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-17 12:28:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787037071] [2023-11-17 12:28:12,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:12,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:12,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:12,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 304 transitions, 4152 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 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 12:28:12,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:12,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:12,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:13,429 INFO L124 PetriNetUnfolderBase]: 795/1641 cut-off events. [2023-11-17 12:28:13,429 INFO L125 PetriNetUnfolderBase]: For 23037/23037 co-relation queries the response was YES. [2023-11-17 12:28:13,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11428 conditions, 1641 events. 795/1641 cut-off events. For 23037/23037 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10540 event pairs, 52 based on Foata normal form. 7/1642 useless extension candidates. Maximal degree in co-relation 11346. Up to 525 conditions per place. [2023-11-17 12:28:13,442 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 234 selfloop transitions, 194 changer transitions 18/446 dead transitions. [2023-11-17 12:28:13,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 446 transitions, 6548 flow [2023-11-17 12:28:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:28:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:28:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 272 transitions. [2023-11-17 12:28:13,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2905982905982906 [2023-11-17 12:28:13,443 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 272 transitions. [2023-11-17 12:28:13,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 272 transitions. [2023-11-17 12:28:13,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:13,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 272 transitions. [2023-11-17 12:28:13,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.555555555555555) internal successors, (272), 36 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:13,444 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 12:28:13,445 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 12:28:13,445 INFO L175 Difference]: Start difference. First operand has 287 places, 304 transitions, 4152 flow. Second operand 36 states and 272 transitions. [2023-11-17 12:28:13,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 446 transitions, 6548 flow [2023-11-17 12:28:13,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 446 transitions, 6002 flow, removed 114 selfloop flow, removed 24 redundant places. [2023-11-17 12:28:13,580 INFO L231 Difference]: Finished difference. Result has 291 places, 346 transitions, 5029 flow [2023-11-17 12:28:13,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5029, PETRI_PLACES=291, PETRI_TRANSITIONS=346} [2023-11-17 12:28:13,580 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 271 predicate places. [2023-11-17 12:28:13,580 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 346 transitions, 5029 flow [2023-11-17 12:28:13,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 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 12:28:13,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:13,581 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:13,593 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 12:28:13,786 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 12:28:13,786 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 12:28:13,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:13,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1996803540, now seen corresponding path program 29 times [2023-11-17 12:28:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789439951] [2023-11-17 12:28:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:13,920 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 12:28:13,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:13,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789439951] [2023-11-17 12:28:13,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789439951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:13,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720782720] [2023-11-17 12:28:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:28:13,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:13,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:13,934 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 12:28:13,973 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 12:28:14,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:28:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:14,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:14,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:14,137 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 12:28:14,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:14,274 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 12:28:14,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720782720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:14,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:14,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-17 12:28:14,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352833205] [2023-11-17 12:28:14,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:14,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:14,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:14,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:14,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:14,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 346 transitions, 5029 flow. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:14,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:14,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:14,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:15,027 INFO L124 PetriNetUnfolderBase]: 811/1649 cut-off events. [2023-11-17 12:28:15,027 INFO L125 PetriNetUnfolderBase]: For 20774/20774 co-relation queries the response was YES. [2023-11-17 12:28:15,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11452 conditions, 1649 events. 811/1649 cut-off events. For 20774/20774 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10503 event pairs, 50 based on Foata normal form. 7/1654 useless extension candidates. Maximal degree in co-relation 11371. Up to 517 conditions per place. [2023-11-17 12:28:15,040 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 245 selfloop transitions, 191 changer transitions 19/455 dead transitions. [2023-11-17 12:28:15,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 455 transitions, 6783 flow [2023-11-17 12:28:15,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 12:28:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 12:28:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 299 transitions. [2023-11-17 12:28:15,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875 [2023-11-17 12:28:15,042 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 299 transitions. [2023-11-17 12:28:15,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 299 transitions. [2023-11-17 12:28:15,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:15,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 299 transitions. [2023-11-17 12:28:15,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 7.475) internal successors, (299), 40 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:15,043 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 12:28:15,043 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 12:28:15,043 INFO L175 Difference]: Start difference. First operand has 291 places, 346 transitions, 5029 flow. Second operand 40 states and 299 transitions. [2023-11-17 12:28:15,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 455 transitions, 6783 flow [2023-11-17 12:28:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 455 transitions, 6078 flow, removed 270 selfloop flow, removed 25 redundant places. [2023-11-17 12:28:15,229 INFO L231 Difference]: Finished difference. Result has 306 places, 354 transitions, 4960 flow [2023-11-17 12:28:15,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4960, PETRI_PLACES=306, PETRI_TRANSITIONS=354} [2023-11-17 12:28:15,230 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 286 predicate places. [2023-11-17 12:28:15,230 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 354 transitions, 4960 flow [2023-11-17 12:28:15,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:15,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:15,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:15,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:15,434 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 12:28:15,435 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 12:28:15,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:15,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1548327808, now seen corresponding path program 30 times [2023-11-17 12:28:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177106380] [2023-11-17 12:28:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:15,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:15,545 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 12:28:15,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:15,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177106380] [2023-11-17 12:28:15,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177106380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221096104] [2023-11-17 12:28:15,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:28:15,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:15,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:15,547 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 12:28:15,571 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 12:28:15,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:28:15,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:15,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:15,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:15,728 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 12:28:15,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:15,868 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 12:28:15,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221096104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:15,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:15,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-17 12:28:15,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557178255] [2023-11-17 12:28:15,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:15,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:15,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:15,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:15,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:15,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:15,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 354 transitions, 4960 flow. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:15,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:15,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:15,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:16,769 INFO L124 PetriNetUnfolderBase]: 800/1601 cut-off events. [2023-11-17 12:28:16,769 INFO L125 PetriNetUnfolderBase]: For 13021/13021 co-relation queries the response was YES. [2023-11-17 12:28:16,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10527 conditions, 1601 events. 800/1601 cut-off events. For 13021/13021 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9977 event pairs, 50 based on Foata normal form. 14/1613 useless extension candidates. Maximal degree in co-relation 10449. Up to 517 conditions per place. [2023-11-17 12:28:16,781 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 203 selfloop transitions, 135 changer transitions 103/441 dead transitions. [2023-11-17 12:28:16,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 441 transitions, 6376 flow [2023-11-17 12:28:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 12:28:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 12:28:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 273 transitions. [2023-11-17 12:28:16,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28378378378378377 [2023-11-17 12:28:16,789 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 273 transitions. [2023-11-17 12:28:16,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 273 transitions. [2023-11-17 12:28:16,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:16,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 273 transitions. [2023-11-17 12:28:16,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 7.378378378378378) internal successors, (273), 37 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:16,790 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 12:28:16,790 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 12:28:16,790 INFO L175 Difference]: Start difference. First operand has 306 places, 354 transitions, 4960 flow. Second operand 37 states and 273 transitions. [2023-11-17 12:28:16,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 441 transitions, 6376 flow [2023-11-17 12:28:16,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 441 transitions, 6024 flow, removed 40 selfloop flow, removed 28 redundant places. [2023-11-17 12:28:16,885 INFO L231 Difference]: Finished difference. Result has 306 places, 287 transitions, 3994 flow [2023-11-17 12:28:16,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3994, PETRI_PLACES=306, PETRI_TRANSITIONS=287} [2023-11-17 12:28:16,886 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 286 predicate places. [2023-11-17 12:28:16,886 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 287 transitions, 3994 flow [2023-11-17 12:28:16,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:16,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:16,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:16,890 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 12:28:17,090 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 12:28:17,090 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 12:28:17,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:17,090 INFO L85 PathProgramCache]: Analyzing trace with hash 900534134, now seen corresponding path program 31 times [2023-11-17 12:28:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447789896] [2023-11-17 12:28:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:17,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:17,240 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 12:28:17,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:17,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447789896] [2023-11-17 12:28:17,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447789896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:17,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455177939] [2023-11-17 12:28:17,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:28:17,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:17,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:17,244 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 12:28:17,246 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 12:28:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:17,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:17,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:17,455 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 12:28:17,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:17,596 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 12:28:17,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455177939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:17,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:17,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:28:17,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910747637] [2023-11-17 12:28:17,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:17,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:17,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:17,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:17,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 287 transitions, 3994 flow. Second operand has 25 states, 25 states have (on average 4.64) internal successors, (116), 25 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 12:28:17,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:17,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:17,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:18,445 INFO L124 PetriNetUnfolderBase]: 717/1442 cut-off events. [2023-11-17 12:28:18,446 INFO L125 PetriNetUnfolderBase]: For 11546/11546 co-relation queries the response was YES. [2023-11-17 12:28:18,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9788 conditions, 1442 events. 717/1442 cut-off events. For 11546/11546 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8578 event pairs, 28 based on Foata normal form. 6/1446 useless extension candidates. Maximal degree in co-relation 9713. Up to 673 conditions per place. [2023-11-17 12:28:18,457 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 286 selfloop transitions, 139 changer transitions 19/444 dead transitions. [2023-11-17 12:28:18,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 444 transitions, 6562 flow [2023-11-17 12:28:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:28:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:28:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 280 transitions. [2023-11-17 12:28:18,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2023-11-17 12:28:18,460 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 280 transitions. [2023-11-17 12:28:18,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 280 transitions. [2023-11-17 12:28:18,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:18,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 280 transitions. [2023-11-17 12:28:18,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 8.0) internal successors, (280), 35 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:18,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 26.0) internal successors, (936), 36 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:18,462 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 26.0) internal successors, (936), 36 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:18,462 INFO L175 Difference]: Start difference. First operand has 306 places, 287 transitions, 3994 flow. Second operand 35 states and 280 transitions. [2023-11-17 12:28:18,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 444 transitions, 6562 flow [2023-11-17 12:28:18,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 444 transitions, 6180 flow, removed 38 selfloop flow, removed 35 redundant places. [2023-11-17 12:28:18,526 INFO L231 Difference]: Finished difference. Result has 281 places, 344 transitions, 5149 flow [2023-11-17 12:28:18,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3651, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5149, PETRI_PLACES=281, PETRI_TRANSITIONS=344} [2023-11-17 12:28:18,527 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 261 predicate places. [2023-11-17 12:28:18,527 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 344 transitions, 5149 flow [2023-11-17 12:28:18,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.64) internal successors, (116), 25 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 12:28:18,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:18,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:18,531 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 12:28:18,729 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 12:28:18,729 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 12:28:18,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:18,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1793272306, now seen corresponding path program 32 times [2023-11-17 12:28:18,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:18,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820225229] [2023-11-17 12:28:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:18,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:18,868 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 12:28:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820225229] [2023-11-17 12:28:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820225229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435066022] [2023-11-17 12:28:18,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:28:18,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:18,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:18,869 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 12:28:18,899 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 12:28:18,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:18,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:18,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:18,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:19,054 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 12:28:19,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:19,221 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 12:28:19,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435066022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:19,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:19,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-17 12:28:19,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297469056] [2023-11-17 12:28:19,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:19,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:28:19,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:28:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:28:19,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:19,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 344 transitions, 5149 flow. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 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 12:28:19,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:19,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:19,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:19,766 INFO L124 PetriNetUnfolderBase]: 715/1421 cut-off events. [2023-11-17 12:28:19,766 INFO L125 PetriNetUnfolderBase]: For 13993/13993 co-relation queries the response was YES. [2023-11-17 12:28:19,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10144 conditions, 1421 events. 715/1421 cut-off events. For 13993/13993 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8233 event pairs, 22 based on Foata normal form. 9/1430 useless extension candidates. Maximal degree in co-relation 10068. Up to 631 conditions per place. [2023-11-17 12:28:19,777 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 260 selfloop transitions, 132 changer transitions 21/413 dead transitions. [2023-11-17 12:28:19,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 413 transitions, 6568 flow [2023-11-17 12:28:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:28:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:28:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 179 transitions. [2023-11-17 12:28:19,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28685897435897434 [2023-11-17 12:28:19,785 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 179 transitions. [2023-11-17 12:28:19,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 179 transitions. [2023-11-17 12:28:19,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:19,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 179 transitions. [2023-11-17 12:28:19,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.458333333333333) internal successors, (179), 24 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:19,786 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 12:28:19,786 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 12:28:19,786 INFO L175 Difference]: Start difference. First operand has 281 places, 344 transitions, 5149 flow. Second operand 24 states and 179 transitions. [2023-11-17 12:28:19,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 413 transitions, 6568 flow [2023-11-17 12:28:19,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 413 transitions, 5864 flow, removed 314 selfloop flow, removed 17 redundant places. [2023-11-17 12:28:19,876 INFO L231 Difference]: Finished difference. Result has 287 places, 344 transitions, 5050 flow [2023-11-17 12:28:19,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4485, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5050, PETRI_PLACES=287, PETRI_TRANSITIONS=344} [2023-11-17 12:28:19,876 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 267 predicate places. [2023-11-17 12:28:19,876 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 344 transitions, 5050 flow [2023-11-17 12:28:19,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 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 12:28:19,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:19,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:19,883 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 12:28:20,081 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 12:28:20,081 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 12:28:20,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2082246516, now seen corresponding path program 33 times [2023-11-17 12:28:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:20,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034442805] [2023-11-17 12:28:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:20,206 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 12:28:20,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:20,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034442805] [2023-11-17 12:28:20,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034442805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:20,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524250638] [2023-11-17 12:28:20,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:28:20,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:20,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:20,208 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 12:28:20,209 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 12:28:20,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:28:20,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:20,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:20,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:20,364 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 12:28:20,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:20,500 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 12:28:20,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524250638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:20,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:20,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:28:20,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230699589] [2023-11-17 12:28:20,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:20,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:20,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:20,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:20,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:20,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:20,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 344 transitions, 5050 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 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 12:28:20,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:20,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:20,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:21,395 INFO L124 PetriNetUnfolderBase]: 1013/1924 cut-off events. [2023-11-17 12:28:21,395 INFO L125 PetriNetUnfolderBase]: For 17515/17515 co-relation queries the response was YES. [2023-11-17 12:28:21,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14280 conditions, 1924 events. 1013/1924 cut-off events. For 17515/17515 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11413 event pairs, 50 based on Foata normal form. 4/1928 useless extension candidates. Maximal degree in co-relation 14204. Up to 1015 conditions per place. [2023-11-17 12:28:21,412 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 335 selfloop transitions, 180 changer transitions 69/584 dead transitions. [2023-11-17 12:28:21,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 584 transitions, 9132 flow [2023-11-17 12:28:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 12:28:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 12:28:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 311 transitions. [2023-11-17 12:28:21,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29174484052532834 [2023-11-17 12:28:21,413 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 311 transitions. [2023-11-17 12:28:21,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 311 transitions. [2023-11-17 12:28:21,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:21,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 311 transitions. [2023-11-17 12:28:21,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 7.585365853658536) internal successors, (311), 41 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:21,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 26.0) internal successors, (1092), 42 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:21,434 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 26.0) internal successors, (1092), 42 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:21,434 INFO L175 Difference]: Start difference. First operand has 287 places, 344 transitions, 5050 flow. Second operand 41 states and 311 transitions. [2023-11-17 12:28:21,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 584 transitions, 9132 flow [2023-11-17 12:28:21,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 584 transitions, 8266 flow, removed 328 selfloop flow, removed 22 redundant places. [2023-11-17 12:28:21,643 INFO L231 Difference]: Finished difference. Result has 311 places, 425 transitions, 6431 flow [2023-11-17 12:28:21,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6431, PETRI_PLACES=311, PETRI_TRANSITIONS=425} [2023-11-17 12:28:21,643 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 291 predicate places. [2023-11-17 12:28:21,643 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 425 transitions, 6431 flow [2023-11-17 12:28:21,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 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 12:28:21,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:21,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:21,650 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 12:28:21,847 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 12:28:21,848 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 12:28:21,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash 312168608, now seen corresponding path program 34 times [2023-11-17 12:28:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:21,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305803725] [2023-11-17 12:28:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:21,980 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 12:28:21,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:21,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305803725] [2023-11-17 12:28:21,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305803725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:21,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151282707] [2023-11-17 12:28:21,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:28:21,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:21,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:21,982 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 12:28:21,984 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 12:28:22,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:28:22,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:22,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 12:28:22,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:22,166 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 12:28:22,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:22,325 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 12:28:22,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151282707] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:22,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:22,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:28:22,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239035274] [2023-11-17 12:28:22,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:22,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:28:22,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:28:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:28:22,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:22,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 425 transitions, 6431 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 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 12:28:22,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:22,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:22,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:23,142 INFO L124 PetriNetUnfolderBase]: 943/1804 cut-off events. [2023-11-17 12:28:23,142 INFO L125 PetriNetUnfolderBase]: For 13114/13114 co-relation queries the response was YES. [2023-11-17 12:28:23,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13272 conditions, 1804 events. 943/1804 cut-off events. For 13114/13114 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10557 event pairs, 38 based on Foata normal form. 12/1816 useless extension candidates. Maximal degree in co-relation 13192. Up to 724 conditions per place. [2023-11-17 12:28:23,155 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 292 selfloop transitions, 145 changer transitions 77/514 dead transitions. [2023-11-17 12:28:23,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 514 transitions, 8114 flow [2023-11-17 12:28:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:28:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:28:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 247 transitions. [2023-11-17 12:28:23,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296875 [2023-11-17 12:28:23,157 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 247 transitions. [2023-11-17 12:28:23,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 247 transitions. [2023-11-17 12:28:23,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:23,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 247 transitions. [2023-11-17 12:28:23,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 7.71875) internal successors, (247), 32 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:23,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:23,158 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 26.0) internal successors, (858), 33 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:23,158 INFO L175 Difference]: Start difference. First operand has 311 places, 425 transitions, 6431 flow. Second operand 32 states and 247 transitions. [2023-11-17 12:28:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 514 transitions, 8114 flow [2023-11-17 12:28:23,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 514 transitions, 7718 flow, removed 99 selfloop flow, removed 31 redundant places. [2023-11-17 12:28:23,288 INFO L231 Difference]: Finished difference. Result has 302 places, 376 transitions, 5595 flow [2023-11-17 12:28:23,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5595, PETRI_PLACES=302, PETRI_TRANSITIONS=376} [2023-11-17 12:28:23,289 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 282 predicate places. [2023-11-17 12:28:23,289 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 376 transitions, 5595 flow [2023-11-17 12:28:23,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 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 12:28:23,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:23,289 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:23,295 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 12:28:23,493 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 12:28:23,493 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 12:28:23,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1485676186, now seen corresponding path program 35 times [2023-11-17 12:28:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:23,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707767310] [2023-11-17 12:28:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:23,659 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 12:28:23,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:23,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707767310] [2023-11-17 12:28:23,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707767310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:23,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487423072] [2023-11-17 12:28:23,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:28:23,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:23,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:23,668 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 12:28:23,693 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 12:28:23,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:28:23,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:23,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:28:23,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:23,849 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 12:28:23,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:23,983 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 12:28:23,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487423072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:23,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:23,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-17 12:28:23,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069398909] [2023-11-17 12:28:23,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:23,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:28:23,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:23,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:28:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:28:23,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:23,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 376 transitions, 5595 flow. Second operand has 29 states, 29 states have (on average 4.586206896551724) internal successors, (133), 29 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:23,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:23,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:23,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:24,564 INFO L124 PetriNetUnfolderBase]: 792/1529 cut-off events. [2023-11-17 12:28:24,564 INFO L125 PetriNetUnfolderBase]: For 8653/8653 co-relation queries the response was YES. [2023-11-17 12:28:24,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10945 conditions, 1529 events. 792/1529 cut-off events. For 8653/8653 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8631 event pairs, 40 based on Foata normal form. 4/1531 useless extension candidates. Maximal degree in co-relation 10865. Up to 1081 conditions per place. [2023-11-17 12:28:24,576 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 267 selfloop transitions, 121 changer transitions 58/446 dead transitions. [2023-11-17 12:28:24,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 446 transitions, 6780 flow [2023-11-17 12:28:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:28:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:28:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 202 transitions. [2023-11-17 12:28:24,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31076923076923074 [2023-11-17 12:28:24,576 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 202 transitions. [2023-11-17 12:28:24,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 202 transitions. [2023-11-17 12:28:24,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:24,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 202 transitions. [2023-11-17 12:28:24,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.08) internal successors, (202), 25 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:24,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:24,578 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:24,578 INFO L175 Difference]: Start difference. First operand has 302 places, 376 transitions, 5595 flow. Second operand 25 states and 202 transitions. [2023-11-17 12:28:24,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 446 transitions, 6780 flow [2023-11-17 12:28:24,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 446 transitions, 6460 flow, removed 33 selfloop flow, removed 28 redundant places. [2023-11-17 12:28:24,665 INFO L231 Difference]: Finished difference. Result has 283 places, 366 transitions, 5433 flow [2023-11-17 12:28:24,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5433, PETRI_PLACES=283, PETRI_TRANSITIONS=366} [2023-11-17 12:28:24,665 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 263 predicate places. [2023-11-17 12:28:24,665 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 366 transitions, 5433 flow [2023-11-17 12:28:24,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.586206896551724) internal successors, (133), 29 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:24,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:24,666 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:24,672 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 12:28:24,870 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 12:28:24,870 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 12:28:24,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1768307718, now seen corresponding path program 36 times [2023-11-17 12:28:24,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771541149] [2023-11-17 12:28:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:24,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:25,081 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 12:28:25,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771541149] [2023-11-17 12:28:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771541149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332446807] [2023-11-17 12:28:25,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:28:25,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:25,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:25,083 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 12:28:25,083 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 12:28:25,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:28:25,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:25,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:28:25,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:25,295 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 12:28:25,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:25,473 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 12:28:25,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332446807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:25,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:25,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-17 12:28:25,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087579423] [2023-11-17 12:28:25,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:25,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:28:25,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:28:25,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:28:25,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:25,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 366 transitions, 5433 flow. Second operand has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 29 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 12:28:25,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:25,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:25,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:26,535 INFO L124 PetriNetUnfolderBase]: 1052/2015 cut-off events. [2023-11-17 12:28:26,535 INFO L125 PetriNetUnfolderBase]: For 10449/10449 co-relation queries the response was YES. [2023-11-17 12:28:26,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14396 conditions, 2015 events. 1052/2015 cut-off events. For 10449/10449 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11917 event pairs, 35 based on Foata normal form. 4/2017 useless extension candidates. Maximal degree in co-relation 14322. Up to 722 conditions per place. [2023-11-17 12:28:26,550 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 265 selfloop transitions, 353 changer transitions 19/637 dead transitions. [2023-11-17 12:28:26,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 637 transitions, 9815 flow [2023-11-17 12:28:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-17 12:28:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-17 12:28:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 380 transitions. [2023-11-17 12:28:26,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2757619738751814 [2023-11-17 12:28:26,551 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 380 transitions. [2023-11-17 12:28:26,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 380 transitions. [2023-11-17 12:28:26,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:26,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 380 transitions. [2023-11-17 12:28:26,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 7.169811320754717) internal successors, (380), 53 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 12:28:26,553 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 12:28:26,553 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 12:28:26,554 INFO L175 Difference]: Start difference. First operand has 283 places, 366 transitions, 5433 flow. Second operand 53 states and 380 transitions. [2023-11-17 12:28:26,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 637 transitions, 9815 flow [2023-11-17 12:28:26,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 637 transitions, 9164 flow, removed 96 selfloop flow, removed 20 redundant places. [2023-11-17 12:28:26,670 INFO L231 Difference]: Finished difference. Result has 312 places, 512 transitions, 8249 flow [2023-11-17 12:28:26,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=8249, PETRI_PLACES=312, PETRI_TRANSITIONS=512} [2023-11-17 12:28:26,671 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-11-17 12:28:26,671 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 512 transitions, 8249 flow [2023-11-17 12:28:26,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 29 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 12:28:26,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:26,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:26,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:26,871 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 12:28:26,872 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:28:26,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1902107748, now seen corresponding path program 37 times [2023-11-17 12:28:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528400541] [2023-11-17 12:28:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:26,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:27,055 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 12:28:27,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:27,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528400541] [2023-11-17 12:28:27,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528400541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:27,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354081457] [2023-11-17 12:28:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:28:27,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:27,056 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:27,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 12:28:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:27,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:28:27,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:27,287 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 12:28:27,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:27,424 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 12:28:27,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354081457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:27,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-17 12:28:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109856075] [2023-11-17 12:28:27,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 12:28:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 12:28:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-17 12:28:27,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:27,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 512 transitions, 8249 flow. Second operand has 29 states, 29 states have (on average 4.586206896551724) internal successors, (133), 29 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:27,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:27,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:27,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:28,739 INFO L124 PetriNetUnfolderBase]: 1099/2078 cut-off events. [2023-11-17 12:28:28,739 INFO L125 PetriNetUnfolderBase]: For 12659/12659 co-relation queries the response was YES. [2023-11-17 12:28:28,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15738 conditions, 2078 events. 1099/2078 cut-off events. For 12659/12659 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12240 event pairs, 33 based on Foata normal form. 10/2086 useless extension candidates. Maximal degree in co-relation 15656. Up to 711 conditions per place. [2023-11-17 12:28:28,788 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 274 selfloop transitions, 372 changer transitions 21/667 dead transitions. [2023-11-17 12:28:28,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 667 transitions, 11014 flow [2023-11-17 12:28:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-17 12:28:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-17 12:28:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 438 transitions. [2023-11-17 12:28:28,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26322115384615385 [2023-11-17 12:28:28,790 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 438 transitions. [2023-11-17 12:28:28,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 438 transitions. [2023-11-17 12:28:28,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:28,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 438 transitions. [2023-11-17 12:28:28,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 6.84375) internal successors, (438), 64 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:28,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 26.0) internal successors, (1690), 65 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:28,792 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 26.0) internal successors, (1690), 65 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:28,792 INFO L175 Difference]: Start difference. First operand has 312 places, 512 transitions, 8249 flow. Second operand 64 states and 438 transitions. [2023-11-17 12:28:28,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 667 transitions, 11014 flow [2023-11-17 12:28:28,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 667 transitions, 9784 flow, removed 492 selfloop flow, removed 23 redundant places. [2023-11-17 12:28:28,945 INFO L231 Difference]: Finished difference. Result has 354 places, 542 transitions, 8414 flow [2023-11-17 12:28:28,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=8414, PETRI_PLACES=354, PETRI_TRANSITIONS=542} [2023-11-17 12:28:28,947 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-11-17 12:28:28,948 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 542 transitions, 8414 flow [2023-11-17 12:28:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.586206896551724) internal successors, (133), 29 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:28,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:28,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:28,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-17 12:28:29,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:28:29,152 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:28:29,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1668974340, now seen corresponding path program 38 times [2023-11-17 12:28:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124012596] [2023-11-17 12:28:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:29,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:29,278 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 12:28:29,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:29,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124012596] [2023-11-17 12:28:29,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124012596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:29,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113908319] [2023-11-17 12:28:29,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:28:29,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:29,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:29,280 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:29,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 12:28:29,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:29,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:29,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:28:29,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:29,483 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 12:28:29,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:29,626 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 12:28:29,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113908319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:29,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:29,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-17 12:28:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293789316] [2023-11-17 12:28:29,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:29,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:28:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:28:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:28:29,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:29,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 542 transitions, 8414 flow. Second operand has 28 states, 28 states have (on average 4.571428571428571) internal successors, (128), 28 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:29,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:29,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:29,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:30,604 INFO L124 PetriNetUnfolderBase]: 1067/1990 cut-off events. [2023-11-17 12:28:30,604 INFO L125 PetriNetUnfolderBase]: For 10798/10798 co-relation queries the response was YES. [2023-11-17 12:28:30,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14602 conditions, 1990 events. 1067/1990 cut-off events. For 10798/10798 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11495 event pairs, 33 based on Foata normal form. 14/2002 useless extension candidates. Maximal degree in co-relation 14521. Up to 751 conditions per place. [2023-11-17 12:28:30,620 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 218 selfloop transitions, 252 changer transitions 162/632 dead transitions. [2023-11-17 12:28:30,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 632 transitions, 10432 flow [2023-11-17 12:28:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 12:28:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 12:28:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 313 transitions. [2023-11-17 12:28:30,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2617056856187291 [2023-11-17 12:28:30,621 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 313 transitions. [2023-11-17 12:28:30,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 313 transitions. [2023-11-17 12:28:30,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:30,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 313 transitions. [2023-11-17 12:28:30,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 6.804347826086956) internal successors, (313), 46 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:30,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 26.0) internal successors, (1222), 47 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:30,623 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 26.0) internal successors, (1222), 47 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:30,623 INFO L175 Difference]: Start difference. First operand has 354 places, 542 transitions, 8414 flow. Second operand 46 states and 313 transitions. [2023-11-17 12:28:30,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 632 transitions, 10432 flow [2023-11-17 12:28:30,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 632 transitions, 9805 flow, removed 42 selfloop flow, removed 37 redundant places. [2023-11-17 12:28:30,749 INFO L231 Difference]: Finished difference. Result has 357 places, 415 transitions, 6672 flow [2023-11-17 12:28:30,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7779, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6672, PETRI_PLACES=357, PETRI_TRANSITIONS=415} [2023-11-17 12:28:30,750 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 337 predicate places. [2023-11-17 12:28:30,751 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 415 transitions, 6672 flow [2023-11-17 12:28:30,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.571428571428571) internal successors, (128), 28 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:30,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:30,751 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:30,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-17 12:28:30,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 12:28:30,955 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:28:30,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1731190724, now seen corresponding path program 39 times [2023-11-17 12:28:30,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:30,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832780672] [2023-11-17 12:28:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:30,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:31,074 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 12:28:31,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:31,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832780672] [2023-11-17 12:28:31,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832780672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:31,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113003144] [2023-11-17 12:28:31,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:28:31,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:31,075 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:31,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 12:28:31,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:28:31,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:31,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:28:31,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:31,261 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 12:28:31,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:31,358 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 12:28:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113003144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:31,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:31,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-17 12:28:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430202471] [2023-11-17 12:28:31,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:28:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:28:31,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:28:31,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:31,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 415 transitions, 6672 flow. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 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 12:28:31,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:31,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:31,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:32,150 INFO L124 PetriNetUnfolderBase]: 1121/1982 cut-off events. [2023-11-17 12:28:32,150 INFO L125 PetriNetUnfolderBase]: For 12845/12845 co-relation queries the response was YES. [2023-11-17 12:28:32,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15542 conditions, 1982 events. 1121/1982 cut-off events. For 12845/12845 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10691 event pairs, 31 based on Foata normal form. 2/1982 useless extension candidates. Maximal degree in co-relation 15459. Up to 1192 conditions per place. [2023-11-17 12:28:32,169 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 370 selfloop transitions, 214 changer transitions 79/663 dead transitions. [2023-11-17 12:28:32,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 663 transitions, 11346 flow [2023-11-17 12:28:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 12:28:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 12:28:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 317 transitions. [2023-11-17 12:28:32,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25941080196399346 [2023-11-17 12:28:32,170 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 317 transitions. [2023-11-17 12:28:32,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 317 transitions. [2023-11-17 12:28:32,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:32,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 317 transitions. [2023-11-17 12:28:32,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 6.74468085106383) internal successors, (317), 47 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:32,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 26.0) internal successors, (1248), 48 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:32,171 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 26.0) internal successors, (1248), 48 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:32,172 INFO L175 Difference]: Start difference. First operand has 357 places, 415 transitions, 6672 flow. Second operand 47 states and 317 transitions. [2023-11-17 12:28:32,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 663 transitions, 11346 flow [2023-11-17 12:28:32,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 663 transitions, 10177 flow, removed 124 selfloop flow, removed 48 redundant places. [2023-11-17 12:28:32,311 INFO L231 Difference]: Finished difference. Result has 331 places, 511 transitions, 8304 flow [2023-11-17 12:28:32,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=8304, PETRI_PLACES=331, PETRI_TRANSITIONS=511} [2023-11-17 12:28:32,313 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 311 predicate places. [2023-11-17 12:28:32,313 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 511 transitions, 8304 flow [2023-11-17 12:28:32,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 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 12:28:32,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:32,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:32,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-17 12:28:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:32,517 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:28:32,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash -74084764, now seen corresponding path program 40 times [2023-11-17 12:28:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:32,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008730625] [2023-11-17 12:28:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:32,652 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 12:28:32,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:32,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008730625] [2023-11-17 12:28:32,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008730625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:32,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175841787] [2023-11-17 12:28:32,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:28:32,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:32,666 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:32,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 12:28:32,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:28:32,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:32,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:28:32,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:32,866 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 12:28:32,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:33,040 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 12:28:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175841787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:33,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:33,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-11-17 12:28:33,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006000116] [2023-11-17 12:28:33,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:33,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 12:28:33,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:33,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 12:28:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-11-17 12:28:33,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:33,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 511 transitions, 8304 flow. Second operand has 27 states, 27 states have (on average 4.592592592592593) internal successors, (124), 27 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 12:28:33,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:33,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:33,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:33,916 INFO L124 PetriNetUnfolderBase]: 1063/1879 cut-off events. [2023-11-17 12:28:33,916 INFO L125 PetriNetUnfolderBase]: For 12669/12669 co-relation queries the response was YES. [2023-11-17 12:28:33,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14763 conditions, 1879 events. 1063/1879 cut-off events. For 12669/12669 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10037 event pairs, 2 based on Foata normal form. 7/1886 useless extension candidates. Maximal degree in co-relation 14669. Up to 877 conditions per place. [2023-11-17 12:28:33,936 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 397 selfloop transitions, 184 changer transitions 22/603 dead transitions. [2023-11-17 12:28:33,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 603 transitions, 10364 flow [2023-11-17 12:28:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:28:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:28:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 233 transitions. [2023-11-17 12:28:33,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26357466063348417 [2023-11-17 12:28:33,946 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 233 transitions. [2023-11-17 12:28:33,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 233 transitions. [2023-11-17 12:28:33,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:33,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 233 transitions. [2023-11-17 12:28:33,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 6.852941176470588) internal successors, (233), 34 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:33,947 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 12:28:33,948 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 12:28:33,948 INFO L175 Difference]: Start difference. First operand has 331 places, 511 transitions, 8304 flow. Second operand 34 states and 233 transitions. [2023-11-17 12:28:33,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 603 transitions, 10364 flow [2023-11-17 12:28:34,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 603 transitions, 9878 flow, removed 151 selfloop flow, removed 38 redundant places. [2023-11-17 12:28:34,099 INFO L231 Difference]: Finished difference. Result has 313 places, 514 transitions, 8316 flow [2023-11-17 12:28:34,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7847, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8316, PETRI_PLACES=313, PETRI_TRANSITIONS=514} [2023-11-17 12:28:34,100 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 293 predicate places. [2023-11-17 12:28:34,100 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 514 transitions, 8316 flow [2023-11-17 12:28:34,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.592592592592593) internal successors, (124), 27 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 12:28:34,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:34,100 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:34,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:34,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-17 12:28:34,304 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:28:34,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:34,305 INFO L85 PathProgramCache]: Analyzing trace with hash -381237906, now seen corresponding path program 41 times [2023-11-17 12:28:34,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:34,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50511553] [2023-11-17 12:28:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:34,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:34,437 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 12:28:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50511553] [2023-11-17 12:28:34,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50511553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384097968] [2023-11-17 12:28:34,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:28:34,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:34,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:34,439 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:34,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 12:28:34,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:28:34,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:34,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:28:34,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:34,637 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 12:28:34,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:34,760 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 12:28:34,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384097968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:34,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:34,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-17 12:28:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289903110] [2023-11-17 12:28:34,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:28:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:28:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-11-17 12:28:34,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:34,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 514 transitions, 8316 flow. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 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 12:28:34,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:34,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:34,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:35,585 INFO L124 PetriNetUnfolderBase]: 1142/1979 cut-off events. [2023-11-17 12:28:35,585 INFO L125 PetriNetUnfolderBase]: For 15594/15594 co-relation queries the response was YES. [2023-11-17 12:28:35,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15914 conditions, 1979 events. 1142/1979 cut-off events. For 15594/15594 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10381 event pairs, 18 based on Foata normal form. 8/1987 useless extension candidates. Maximal degree in co-relation 15833. Up to 991 conditions per place. [2023-11-17 12:28:35,602 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 342 selfloop transitions, 216 changer transitions 110/668 dead transitions. [2023-11-17 12:28:35,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 668 transitions, 11655 flow [2023-11-17 12:28:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 12:28:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 12:28:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 279 transitions. [2023-11-17 12:28:35,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26172607879924953 [2023-11-17 12:28:35,604 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 279 transitions. [2023-11-17 12:28:35,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 279 transitions. [2023-11-17 12:28:35,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:35,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 279 transitions. [2023-11-17 12:28:35,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 6.804878048780488) internal successors, (279), 41 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:35,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 26.0) internal successors, (1092), 42 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:35,606 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 26.0) internal successors, (1092), 42 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:35,606 INFO L175 Difference]: Start difference. First operand has 313 places, 514 transitions, 8316 flow. Second operand 41 states and 279 transitions. [2023-11-17 12:28:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 668 transitions, 11655 flow [2023-11-17 12:28:35,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 668 transitions, 11432 flow, removed 27 selfloop flow, removed 23 redundant places. [2023-11-17 12:28:35,763 INFO L231 Difference]: Finished difference. Result has 346 places, 507 transitions, 9029 flow [2023-11-17 12:28:35,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8131, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=9029, PETRI_PLACES=346, PETRI_TRANSITIONS=507} [2023-11-17 12:28:35,764 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 326 predicate places. [2023-11-17 12:28:35,764 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 507 transitions, 9029 flow [2023-11-17 12:28:35,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 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 12:28:35,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:35,764 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:35,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:35,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:35,969 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:28:35,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1971289852, now seen corresponding path program 42 times [2023-11-17 12:28:35,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:35,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719040506] [2023-11-17 12:28:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:35,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:36,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719040506] [2023-11-17 12:28:36,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719040506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256483278] [2023-11-17 12:28:36,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:28:36,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:36,129 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:36,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 12:28:36,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:28:36,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:36,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:28:36,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:36,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:36,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256483278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:36,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:36,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-11-17 12:28:36,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146178103] [2023-11-17 12:28:36,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:36,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 12:28:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 12:28:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2023-11-17 12:28:36,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:36,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 507 transitions, 9029 flow. Second operand has 30 states, 30 states have (on average 4.566666666666666) internal successors, (137), 30 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:36,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:36,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:36,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:37,366 INFO L124 PetriNetUnfolderBase]: 1094/1849 cut-off events. [2023-11-17 12:28:37,366 INFO L125 PetriNetUnfolderBase]: For 17437/17437 co-relation queries the response was YES. [2023-11-17 12:28:37,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16062 conditions, 1849 events. 1094/1849 cut-off events. For 17437/17437 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9201 event pairs, 19 based on Foata normal form. 2/1851 useless extension candidates. Maximal degree in co-relation 15964. Up to 737 conditions per place. [2023-11-17 12:28:37,385 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 213 selfloop transitions, 32 changer transitions 384/629 dead transitions. [2023-11-17 12:28:37,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 629 transitions, 11775 flow [2023-11-17 12:28:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:28:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:28:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 235 transitions. [2023-11-17 12:28:37,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25824175824175827 [2023-11-17 12:28:37,386 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 235 transitions. [2023-11-17 12:28:37,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 235 transitions. [2023-11-17 12:28:37,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:37,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 235 transitions. [2023-11-17 12:28:37,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 6.714285714285714) internal successors, (235), 35 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:37,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 26.0) internal successors, (936), 36 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:37,387 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 26.0) internal successors, (936), 36 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:37,387 INFO L175 Difference]: Start difference. First operand has 346 places, 507 transitions, 9029 flow. Second operand 35 states and 235 transitions. [2023-11-17 12:28:37,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 629 transitions, 11775 flow [2023-11-17 12:28:37,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 629 transitions, 10969 flow, removed 274 selfloop flow, removed 31 redundant places. [2023-11-17 12:28:37,607 INFO L231 Difference]: Finished difference. Result has 332 places, 234 transitions, 4287 flow [2023-11-17 12:28:37,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8292, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4287, PETRI_PLACES=332, PETRI_TRANSITIONS=234} [2023-11-17 12:28:37,608 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 312 predicate places. [2023-11-17 12:28:37,608 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 234 transitions, 4287 flow [2023-11-17 12:28:37,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.566666666666666) internal successors, (137), 30 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:37,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:37,608 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:37,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:37,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:37,813 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:28:37,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 849843392, now seen corresponding path program 43 times [2023-11-17 12:28:37,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:37,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502171251] [2023-11-17 12:28:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:37,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:37,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:37,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502171251] [2023-11-17 12:28:37,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502171251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:37,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587623368] [2023-11-17 12:28:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:28:37,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:37,990 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:38,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 12:28:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:38,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 12:28:38,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:38,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:38,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587623368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:38,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:38,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 28 [2023-11-17 12:28:38,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503669958] [2023-11-17 12:28:38,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:38,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 12:28:38,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:38,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 12:28:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-11-17 12:28:38,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:38,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 234 transitions, 4287 flow. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:38,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:38,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:38,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:39,328 INFO L124 PetriNetUnfolderBase]: 593/1017 cut-off events. [2023-11-17 12:28:39,328 INFO L125 PetriNetUnfolderBase]: For 10869/10869 co-relation queries the response was YES. [2023-11-17 12:28:39,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8667 conditions, 1017 events. 593/1017 cut-off events. For 10869/10869 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4477 event pairs, 0 based on Foata normal form. 5/1022 useless extension candidates. Maximal degree in co-relation 8577. Up to 315 conditions per place. [2023-11-17 12:28:39,338 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 92 selfloop transitions, 181 changer transitions 83/356 dead transitions. [2023-11-17 12:28:39,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 356 transitions, 6276 flow [2023-11-17 12:28:39,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:28:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:28:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 253 transitions. [2023-11-17 12:28:39,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2560728744939271 [2023-11-17 12:28:39,339 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 253 transitions. [2023-11-17 12:28:39,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 253 transitions. [2023-11-17 12:28:39,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:39,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 253 transitions. [2023-11-17 12:28:39,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 6.657894736842105) internal successors, (253), 38 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:39,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 26.0) internal successors, (1014), 39 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:39,340 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 26.0) internal successors, (1014), 39 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:39,340 INFO L175 Difference]: Start difference. First operand has 332 places, 234 transitions, 4287 flow. Second operand 38 states and 253 transitions. [2023-11-17 12:28:39,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 356 transitions, 6276 flow [2023-11-17 12:28:39,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 356 transitions, 5102 flow, removed 374 selfloop flow, removed 55 redundant places. [2023-11-17 12:28:39,425 INFO L231 Difference]: Finished difference. Result has 209 places, 235 transitions, 3860 flow [2023-11-17 12:28:39,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3860, PETRI_PLACES=209, PETRI_TRANSITIONS=235} [2023-11-17 12:28:39,426 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-17 12:28:39,426 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 235 transitions, 3860 flow [2023-11-17 12:28:39,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:39,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:28:39,426 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:28:39,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-17 12:28:39,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-17 12:28:39,630 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:28:39,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:28:39,631 INFO L85 PathProgramCache]: Analyzing trace with hash -53381670, now seen corresponding path program 44 times [2023-11-17 12:28:39,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:28:39,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26743428] [2023-11-17 12:28:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:28:39,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:28:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:28:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:28:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:28:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26743428] [2023-11-17 12:28:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26743428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:28:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431757609] [2023-11-17 12:28:39,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:28:39,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:28:39,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:28:39,787 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:28:39,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 12:28:39,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:28:39,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:28:39,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:28:39,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:28:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:40,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:28:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:28:40,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431757609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:28:40,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:28:40,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 30 [2023-11-17 12:28:40,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889890438] [2023-11-17 12:28:40,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:28:40,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 12:28:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:28:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 12:28:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2023-11-17 12:28:40,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2023-11-17 12:28:40,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 235 transitions, 3860 flow. Second operand has 32 states, 32 states have (on average 4.59375) internal successors, (147), 32 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:40,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:28:40,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2023-11-17 12:28:40,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:28:40,676 INFO L124 PetriNetUnfolderBase]: 447/769 cut-off events. [2023-11-17 12:28:40,676 INFO L125 PetriNetUnfolderBase]: For 5720/5720 co-relation queries the response was YES. [2023-11-17 12:28:40,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 769 events. 447/769 cut-off events. For 5720/5720 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3114 event pairs, 0 based on Foata normal form. 3/772 useless extension candidates. Maximal degree in co-relation 6164. Up to 239 conditions per place. [2023-11-17 12:28:40,681 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 0 selfloop transitions, 0 changer transitions 283/283 dead transitions. [2023-11-17 12:28:40,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 283 transitions, 4741 flow [2023-11-17 12:28:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:28:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:28:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 185 transitions. [2023-11-17 12:28:40,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23717948717948717 [2023-11-17 12:28:40,682 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 185 transitions. [2023-11-17 12:28:40,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 185 transitions. [2023-11-17 12:28:40,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:28:40,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 185 transitions. [2023-11-17 12:28:40,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 6.166666666666667) internal successors, (185), 30 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:40,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 26.0) internal successors, (806), 31 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:40,683 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 26.0) internal successors, (806), 31 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:40,683 INFO L175 Difference]: Start difference. First operand has 209 places, 235 transitions, 3860 flow. Second operand 30 states and 185 transitions. [2023-11-17 12:28:40,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 283 transitions, 4741 flow [2023-11-17 12:28:40,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 283 transitions, 4481 flow, removed 55 selfloop flow, removed 24 redundant places. [2023-11-17 12:28:40,729 INFO L231 Difference]: Finished difference. Result has 201 places, 0 transitions, 0 flow [2023-11-17 12:28:40,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=0, PETRI_PLACES=201, PETRI_TRANSITIONS=0} [2023-11-17 12:28:40,730 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 181 predicate places. [2023-11-17 12:28:40,730 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 0 transitions, 0 flow [2023-11-17 12:28:40,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.59375) internal successors, (147), 32 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:28:40,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:28:40,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:28:40,733 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:28:40,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-17 12:28:40,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-17 12:28:40,938 INFO L445 BasicCegarLoop]: Path program histogram: [44, 1, 1] [2023-11-17 12:28:40,940 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:28:40,940 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:28:40,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:28:40 BasicIcfg [2023-11-17 12:28:40,944 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:28:40,944 INFO L158 Benchmark]: Toolchain (without parser) took 71889.96ms. Allocated memory was 183.5MB in the beginning and 716.2MB in the end (delta: 532.7MB). Free memory was 131.5MB in the beginning and 521.4MB in the end (delta: -389.9MB). Peak memory consumption was 144.0MB. Max. memory is 8.0GB. [2023-11-17 12:28:40,944 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:28:40,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.68ms. Allocated memory is still 183.5MB. Free memory was 131.5MB in the beginning and 120.3MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:28:40,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.03ms. Allocated memory is still 183.5MB. Free memory was 120.3MB in the beginning and 118.6MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:28:40,945 INFO L158 Benchmark]: Boogie Preprocessor took 31.47ms. Allocated memory is still 183.5MB. Free memory was 118.6MB in the beginning and 117.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:28:40,945 INFO L158 Benchmark]: RCFGBuilder took 546.70ms. Allocated memory was 183.5MB in the beginning and 287.3MB in the end (delta: 103.8MB). Free memory was 117.5MB in the beginning and 254.4MB in the end (delta: -136.9MB). Peak memory consumption was 29.3MB. Max. memory is 8.0GB. [2023-11-17 12:28:40,945 INFO L158 Benchmark]: TraceAbstraction took 71097.31ms. Allocated memory was 287.3MB in the beginning and 716.2MB in the end (delta: 428.9MB). Free memory was 253.8MB in the beginning and 521.4MB in the end (delta: -267.6MB). Peak memory consumption was 161.8MB. Max. memory is 8.0GB. [2023-11-17 12:28:40,946 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.68ms. Allocated memory is still 183.5MB. Free memory was 131.5MB in the beginning and 120.3MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.03ms. Allocated memory is still 183.5MB. Free memory was 120.3MB in the beginning and 118.6MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.47ms. Allocated memory is still 183.5MB. Free memory was 118.6MB in the beginning and 117.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 546.70ms. Allocated memory was 183.5MB in the beginning and 287.3MB in the end (delta: 103.8MB). Free memory was 117.5MB in the beginning and 254.4MB in the end (delta: -136.9MB). Peak memory consumption was 29.3MB. Max. memory is 8.0GB. * TraceAbstraction took 71097.31ms. Allocated memory was 287.3MB in the beginning and 716.2MB in the end (delta: 428.9MB). Free memory was 253.8MB in the beginning and 521.4MB in the end (delta: -267.6MB). Peak memory consumption was 161.8MB. 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, 111 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 106, independent: 105, independent conditional: 0, independent unconditional: 105, 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: 52, independent: 51, independent conditional: 0, independent unconditional: 51, 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: 52, independent: 51, independent conditional: 0, independent unconditional: 51, 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: 4, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 106, independent: 54, independent conditional: 0, independent unconditional: 54, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 52, unknown conditional: 0, unknown unconditional: 52] , 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 - PositiveResult [Line: 78]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - 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: 71.0s, OverallIterations: 46, TraceHistogramMax: 5, PathProgramHistogramMax: 44, EmptinessCheckTime: 0.0s, AutomataDifference: 36.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4585 SdHoareTripleChecker+Valid, 13.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4585 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 11.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1870 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32995 IncrementalHoareTripleChecker+Invalid, 34865 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1870 mSolverCounterUnsat, 0 mSDtfsCounter, 32995 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2624 GetRequests, 743 SyntacticMatches, 12 SemanticMatches, 1869 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25945 ImplicationChecksByTransitivity, 20.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9029occurred in iteration=43, InterpolantAutomatonStates: 1346, 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: 0.4s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.7s InterpolantComputationTime, 1493 NumberOfCodeBlocks, 1493 NumberOfCodeBlocksAsserted, 140 NumberOfCheckSat, 2092 ConstructedInterpolants, 0 QuantifiedInterpolants, 23031 SizeOfPredicates, 176 NumberOfNonLiveVariables, 5752 ConjunctsInSsa, 838 ConjunctsInUnsatCore, 134 InterpolantComputations, 2 PerfectInterpolantSequences, 27/769 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 12:28:40,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...