/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/pthread/fib_safe-5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:09:52,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:09:52,929 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 11:09:52,954 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:09:52,954 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:09:52,955 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:09:52,955 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:09:52,956 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:09:52,956 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:09:52,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:09:52,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:09:52,961 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:09:52,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:09:52,962 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:09:52,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:09:52,962 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:09:52,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:09:52,962 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:09:52,962 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:09:52,962 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:09:52,963 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:09:52,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:09:52,964 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:09:52,964 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:09:52,965 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:09:52,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:09:52,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:09:52,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:09:52,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:09:52,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:09:52,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:09:52,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:09:52,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:09:53,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:09:53,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:09:53,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:09:53,196 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:09:53,196 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:09:53,197 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-5.i [2023-11-17 11:09:54,307 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:09:54,491 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:09:54,492 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-5.i [2023-11-17 11:09:54,502 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007a7a04a/adb53f2ed03b4b68a5ccd81dadfec902/FLAG189bcbec4 [2023-11-17 11:09:54,511 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007a7a04a/adb53f2ed03b4b68a5ccd81dadfec902 [2023-11-17 11:09:54,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:09:54,514 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:09:54,515 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:09:54,515 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:09:54,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:09:54,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dca406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54, skipping insertion in model container [2023-11-17 11:09:54,519 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:09:54,780 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-5.i[30241,30254] [2023-11-17 11:09:54,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:09:54,803 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:09:54,833 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-5.i[30241,30254] [2023-11-17 11:09:54,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:09:54,869 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:09:54,869 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:09:54,874 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:09:54,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54 WrapperNode [2023-11-17 11:09:54,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:09:54,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:09:54,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:09:54,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:09:54,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,921 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-17 11:09:54,922 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:09:54,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:09:54,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:09:54,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:09:54,928 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:09:54,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:09:54,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:09:54,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:09:54,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (1/1) ... [2023-11-17 11:09:54,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:09:54,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:54,974 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 11:09:54,996 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 11:09:55,002 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-17 11:09:55,002 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-17 11:09:55,002 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-17 11:09:55,003 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-17 11:09:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:09:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:09:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:09:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:09:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:09:55,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:09:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:09:55,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:09:55,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:09:55,005 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 11:09:55,123 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:09:55,125 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:09:55,294 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:09:55,393 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:09:55,393 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 11:09:55,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:09:55 BoogieIcfgContainer [2023-11-17 11:09:55,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:09:55,395 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:09:55,396 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:09:55,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:09:55,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:09:54" (1/3) ... [2023-11-17 11:09:55,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6da6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:09:55, skipping insertion in model container [2023-11-17 11:09:55,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:54" (2/3) ... [2023-11-17 11:09:55,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6da6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:09:55, skipping insertion in model container [2023-11-17 11:09:55,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:09:55" (3/3) ... [2023-11-17 11:09:55,399 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2023-11-17 11:09:55,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:09:55,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:09:55,411 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:09:55,447 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:09:55,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2023-11-17 11:09:55,506 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 11:09:55,506 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:55,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-17 11:09:55,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2023-11-17 11:09:55,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:55,519 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:09:55,529 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:55,531 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:55,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:55,538 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 11:09:55,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:55,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-17 11:09:55,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 270 [2023-11-17 11:09:56,809 INFO L134 LiptonReduction]: Checked pairs total: 210 [2023-11-17 11:09:56,809 INFO L136 LiptonReduction]: Total number of compositions: 18 [2023-11-17 11:09:56,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:09:56,844 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;@33340e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:09:56,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:09:56,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:09:56,852 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-17 11:09:56,852 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:56,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:56,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:09:56,853 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 11:09:56,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:56,872 INFO L85 PathProgramCache]: Analyzing trace with hash -146274990, now seen corresponding path program 1 times [2023-11-17 11:09:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:56,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197827932] [2023-11-17 11:09:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:56,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:57,042 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 11:09:57,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:57,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197827932] [2023-11-17 11:09:57,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197827932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:09:57,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:09:57,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:09:57,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104299232] [2023-11-17 11:09:57,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:09:57,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:09:57,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:09:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:09:57,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:57,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:57,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:57,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:57,119 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-17 11:09:57,119 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:09:57,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 323 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2023-11-17 11:09:57,121 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-11-17 11:09:57,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2023-11-17 11:09:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:09:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:09:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2023-11-17 11:09:57,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41843971631205673 [2023-11-17 11:09:57,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:57,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,137 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 59 transitions. [2023-11-17 11:09:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2023-11-17 11:09:57,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:09:57,140 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2023-11-17 11:09:57,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-11-17 11:09:57,144 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-17 11:09:57,144 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2023-11-17 11:09:57,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:57,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:09:57,145 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 11:09:57,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash -239558132, now seen corresponding path program 1 times [2023-11-17 11:09:57,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148118921] [2023-11-17 11:09:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:57,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:57,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148118921] [2023-11-17 11:09:57,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148118921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:57,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523953110] [2023-11-17 11:09:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:57,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:57,223 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 11:09:57,233 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 11:09:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:57,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:09:57,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:57,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:57,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523953110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:57,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:57,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:09:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799659521] [2023-11-17 11:09:57,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:09:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:09:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:09:57,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:57,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:57,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:57,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:57,431 INFO L124 PetriNetUnfolderBase]: 133/203 cut-off events. [2023-11-17 11:09:57,432 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:09:57,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 442 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2023-11-17 11:09:57,433 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-17 11:09:57,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2023-11-17 11:09:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:09:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:09:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2023-11-17 11:09:57,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134751773049644 [2023-11-17 11:09:57,435 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 116 transitions. [2023-11-17 11:09:57,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 116 transitions. [2023-11-17 11:09:57,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:57,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 116 transitions. [2023-11-17 11:09:57,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 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 11:09:57,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,439 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,439 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 116 transitions. [2023-11-17 11:09:57,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2023-11-17 11:09:57,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:09:57,440 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2023-11-17 11:09:57,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-11-17 11:09:57,440 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-11-17 11:09:57,441 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2023-11-17 11:09:57,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:57,441 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:57,453 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 11:09:57,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:57,649 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 11:09:57,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:57,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1558602706, now seen corresponding path program 2 times [2023-11-17 11:09:57,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:57,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537897043] [2023-11-17 11:09:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:57,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:57,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537897043] [2023-11-17 11:09:57,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537897043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:57,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196285210] [2023-11-17 11:09:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:09:57,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:57,822 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 11:09:57,849 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 11:09:57,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:09:57,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:09:57,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 11:09:57,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:57,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:57,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196285210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:57,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:57,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 11:09:57,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29808874] [2023-11-17 11:09:57,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:57,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:09:57,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:09:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:09:57,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:57,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:57,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:57,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:57,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:58,080 INFO L124 PetriNetUnfolderBase]: 241/365 cut-off events. [2023-11-17 11:09:58,080 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-17 11:09:58,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 841 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2023-11-17 11:09:58,095 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-17 11:09:58,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2023-11-17 11:09:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:09:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:09:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2023-11-17 11:09:58,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41312056737588654 [2023-11-17 11:09:58,097 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:58,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 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 11:09:58,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:58,100 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:58,100 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 233 transitions. [2023-11-17 11:09:58,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2023-11-17 11:09:58,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:09:58,103 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2023-11-17 11:09:58,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2023-11-17 11:09:58,104 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2023-11-17 11:09:58,104 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2023-11-17 11:09:58,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:58,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:58,104 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:58,127 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 11:09:58,309 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,SelfDestructingSolverStorable2 [2023-11-17 11:09:58,310 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 11:09:58,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash -254158446, now seen corresponding path program 3 times [2023-11-17 11:09:58,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:58,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350347995] [2023-11-17 11:09:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:58,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350347995] [2023-11-17 11:09:58,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350347995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043942673] [2023-11-17 11:09:58,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:09:58,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:58,521 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 11:09:58,540 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 11:09:58,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-17 11:09:58,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:09:58,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 11:09:58,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:58,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:58,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043942673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:58,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:58,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-11-17 11:09:58,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148788835] [2023-11-17 11:09:58,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:58,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 11:09:58,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 11:09:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-17 11:09:58,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:58,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 15 states, 15 states have (on average 13.4) internal successors, (201), 15 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:58,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:58,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:58,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:58,887 INFO L124 PetriNetUnfolderBase]: 277/419 cut-off events. [2023-11-17 11:09:58,888 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2023-11-17 11:09:58,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 419 events. 277/419 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 973 event pairs, 20 based on Foata normal form. 18/345 useless extension candidates. Maximal degree in co-relation 1308. Up to 100 conditions per place. [2023-11-17 11:09:58,891 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 84 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2023-11-17 11:09:58,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 500 flow [2023-11-17 11:09:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 11:09:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 11:09:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 267 transitions. [2023-11-17 11:09:58,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40577507598784196 [2023-11-17 11:09:58,894 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 267 transitions. [2023-11-17 11:09:58,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 267 transitions. [2023-11-17 11:09:58,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:58,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 267 transitions. [2023-11-17 11:09:58,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 19.071428571428573) internal successors, (267), 14 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:58,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 47.0) internal successors, (705), 15 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:58,900 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 47.0) internal successors, (705), 15 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:58,900 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 14 states and 267 transitions. [2023-11-17 11:09:58,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 500 flow [2023-11-17 11:09:58,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 448 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-17 11:09:58,921 INFO L231 Difference]: Finished difference. Result has 51 places, 25 transitions, 146 flow [2023-11-17 11:09:58,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=146, PETRI_PLACES=51, PETRI_TRANSITIONS=25} [2023-11-17 11:09:58,922 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 33 predicate places. [2023-11-17 11:09:58,923 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 25 transitions, 146 flow [2023-11-17 11:09:58,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.4) internal successors, (201), 15 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:09:58,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:58,923 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:58,930 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 11:09:59,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:59,124 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 11:09:59,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash 566845650, now seen corresponding path program 4 times [2023-11-17 11:09:59,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:59,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054362447] [2023-11-17 11:09:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:59,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:09:59,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:59,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054362447] [2023-11-17 11:09:59,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054362447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:59,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762841776] [2023-11-17 11:09:59,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:09:59,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:59,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:59,736 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 11:09:59,760 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 11:09:59,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:09:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:09:59,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 11:09:59,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:10:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:00,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:10:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:00,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762841776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:10:00,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:10:00,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 11:10:00,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206863775] [2023-11-17 11:10:00,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:10:00,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 11:10:00,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:10:00,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 11:10:00,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 11:10:00,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-17 11:10:00,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 25 transitions, 146 flow. Second operand has 41 states, 41 states have (on average 8.317073170731707) internal successors, (341), 41 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:10:00,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:10:00,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-17 11:10:00,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:10:06,961 INFO L124 PetriNetUnfolderBase]: 12971/19464 cut-off events. [2023-11-17 11:10:06,962 INFO L125 PetriNetUnfolderBase]: For 54800/54800 co-relation queries the response was YES. [2023-11-17 11:10:06,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61138 conditions, 19464 events. 12971/19464 cut-off events. For 54800/54800 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 120192 event pairs, 65 based on Foata normal form. 113/14727 useless extension candidates. Maximal degree in co-relation 61114. Up to 4060 conditions per place. [2023-11-17 11:10:07,075 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 529 selfloop transitions, 925 changer transitions 0/1454 dead transitions. [2023-11-17 11:10:07,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 1454 transitions, 11283 flow [2023-11-17 11:10:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-17 11:10:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-11-17 11:10:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 1587 transitions. [2023-11-17 11:10:07,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.318546768366118 [2023-11-17 11:10:07,083 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 1587 transitions. [2023-11-17 11:10:07,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 1587 transitions. [2023-11-17 11:10:07,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:10:07,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 1587 transitions. [2023-11-17 11:10:07,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 14.971698113207546) internal successors, (1587), 106 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:10:07,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 47.0) internal successors, (5029), 107 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:10:07,098 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 47.0) internal successors, (5029), 107 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:10:07,098 INFO L175 Difference]: Start difference. First operand has 51 places, 25 transitions, 146 flow. Second operand 106 states and 1587 transitions. [2023-11-17 11:10:07,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 1454 transitions, 11283 flow [2023-11-17 11:10:07,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 1454 transitions, 9145 flow, removed 597 selfloop flow, removed 11 redundant places. [2023-11-17 11:10:07,501 INFO L231 Difference]: Finished difference. Result has 161 places, 950 transitions, 5765 flow [2023-11-17 11:10:07,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=5765, PETRI_PLACES=161, PETRI_TRANSITIONS=950} [2023-11-17 11:10:07,503 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 143 predicate places. [2023-11-17 11:10:07,503 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 950 transitions, 5765 flow [2023-11-17 11:10:07,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 8.317073170731707) internal successors, (341), 41 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:10:07,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:10:07,504 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:10:07,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 11:10:07,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:10:07,709 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 11:10:07,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:10:07,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1597778822, now seen corresponding path program 1 times [2023-11-17 11:10:07,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:10:07,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806689906] [2023-11-17 11:10:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:10:07,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:10:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:10:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:08,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:10:08,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806689906] [2023-11-17 11:10:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806689906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:10:08,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187844398] [2023-11-17 11:10:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:10:08,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:10:08,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:10:08,300 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 11:10:08,325 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 11:10:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:10:08,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:10:08,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:10:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:08,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:10:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:09,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187844398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:10:09,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:10:09,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-17 11:10:09,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241863954] [2023-11-17 11:10:09,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:10:09,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 11:10:09,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:10:09,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 11:10:09,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2023-11-17 11:10:09,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-17 11:10:09,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 950 transitions, 5765 flow. Second operand has 47 states, 47 states have (on average 8.340425531914894) internal successors, (392), 47 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:10:09,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:10:09,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-17 11:10:09,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:10:59,910 INFO L124 PetriNetUnfolderBase]: 180647/270850 cut-off events. [2023-11-17 11:10:59,910 INFO L125 PetriNetUnfolderBase]: For 6124263/6124263 co-relation queries the response was YES. [2023-11-17 11:11:01,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127796 conditions, 270850 events. 180647/270850 cut-off events. For 6124263/6124263 co-relation queries the response was YES. Maximal size of possible extension queue 12525. Compared 2406172 event pairs, 3594 based on Foata normal form. 4316/275166 useless extension candidates. Maximal degree in co-relation 1127756. Up to 51905 conditions per place. [2023-11-17 11:11:02,569 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 1865 selfloop transitions, 25312 changer transitions 0/27177 dead transitions. [2023-11-17 11:11:02,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 27177 transitions, 212206 flow [2023-11-17 11:11:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2023-11-17 11:11:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2023-11-17 11:11:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 3437 transitions. [2023-11-17 11:11:02,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2972669088393012 [2023-11-17 11:11:02,590 INFO L72 ComplementDD]: Start complementDD. Operand 246 states and 3437 transitions. [2023-11-17 11:11:02,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 246 states and 3437 transitions. [2023-11-17 11:11:02,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:11:02,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 246 states and 3437 transitions. [2023-11-17 11:11:02,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 247 states, 246 states have (on average 13.971544715447154) internal successors, (3437), 246 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:11:02,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 247 states, 247 states have (on average 47.0) internal successors, (11609), 247 states have internal predecessors, (11609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:11:02,624 INFO L81 ComplementDD]: Finished complementDD. Result has 247 states, 247 states have (on average 47.0) internal successors, (11609), 247 states have internal predecessors, (11609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:11:02,625 INFO L175 Difference]: Start difference. First operand has 161 places, 950 transitions, 5765 flow. Second operand 246 states and 3437 transitions. [2023-11-17 11:11:02,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 27177 transitions, 212206 flow [2023-11-17 11:18:37,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 27177 transitions, 210078 flow, removed 1064 selfloop flow, removed 0 redundant places. [2023-11-17 11:18:37,360 INFO L231 Difference]: Finished difference. Result has 471 places, 26195 transitions, 212347 flow [2023-11-17 11:18:37,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=246, PETRI_FLOW=212347, PETRI_PLACES=471, PETRI_TRANSITIONS=26195} [2023-11-17 11:18:37,362 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 453 predicate places. [2023-11-17 11:18:37,362 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 26195 transitions, 212347 flow [2023-11-17 11:18:37,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 8.340425531914894) internal successors, (392), 47 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:18:37,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:18:37,363 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:18:37,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 11:18:37,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:18:37,569 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 11:18:37,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:18:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash -240656587, now seen corresponding path program 1 times [2023-11-17 11:18:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:18:37,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185363100] [2023-11-17 11:18:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:18:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:18:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:18:38,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:18:38,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185363100] [2023-11-17 11:18:38,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185363100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:18:38,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115058782] [2023-11-17 11:18:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:18:38,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:18:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:18:38,017 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 11:18:38,020 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 11:18:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:18:38,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:18:38,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:18:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:18:38,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:18:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:18:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115058782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:18:39,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:18:39,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-17 11:18:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285554626] [2023-11-17 11:18:39,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:18:39,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 11:18:39,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:18:39,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 11:18:39,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2023-11-17 11:18:39,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-17 11:18:39,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 26195 transitions, 212347 flow. Second operand has 47 states, 47 states have (on average 8.340425531914894) internal successors, (392), 47 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:18:39,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:18:39,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-17 11:18:39,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 11:19:21,574 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 11:19:21,574 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 11:19:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2023-11-17 11:19:21,626 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 11:19:21,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 11:19:21,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:19:21,832 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 7/47 universal loopers) in iteration 7,while PetriNetUnfolder was constructing finite prefix that currently has 29411 conditions, 8491 events (5360/8490 cut-off events. For 8542/8542 co-relation queries the response was YES. Maximal size of possible extension queue 2221. Compared 65097 event pairs, 497 based on Foata normal form. 0/10712 useless extension candidates. Maximal degree in co-relation 29313. Up to 3991 conditions per place.). [2023-11-17 11:19:21,833 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 11:19:21,833 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 11:19:21,834 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2023-11-17 11:19:21,836 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 11:19:21,836 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 11:19:21,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 11:19:21 BasicIcfg [2023-11-17 11:19:21,838 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 11:19:21,839 INFO L158 Benchmark]: Toolchain (without parser) took 567324.69ms. Allocated memory was 186.6MB in the beginning and 7.5GB in the end (delta: 7.4GB). Free memory was 133.2MB in the beginning and 2.6GB in the end (delta: -2.4GB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. [2023-11-17 11:19:21,839 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 140.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 11:19:21,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 359.58ms. Allocated memory is still 186.6MB. Free memory was 132.9MB in the beginning and 113.7MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-11-17 11:19:21,839 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.72ms. Allocated memory is still 186.6MB. Free memory was 113.7MB in the beginning and 111.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 11:19:21,839 INFO L158 Benchmark]: Boogie Preprocessor took 28.84ms. Allocated memory is still 186.6MB. Free memory was 111.6MB in the beginning and 110.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 11:19:21,840 INFO L158 Benchmark]: RCFGBuilder took 442.59ms. Allocated memory was 186.6MB in the beginning and 303.0MB in the end (delta: 116.4MB). Free memory was 110.1MB in the beginning and 259.1MB in the end (delta: -149.0MB). Peak memory consumption was 16.5MB. Max. memory is 8.0GB. [2023-11-17 11:19:21,840 INFO L158 Benchmark]: TraceAbstraction took 566442.87ms. Allocated memory was 303.0MB in the beginning and 7.5GB in the end (delta: 7.2GB). Free memory was 258.6MB in the beginning and 2.6GB in the end (delta: -2.3GB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. [2023-11-17 11:19:21,841 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 186.6MB. Free memory is still 140.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 359.58ms. Allocated memory is still 186.6MB. Free memory was 132.9MB in the beginning and 113.7MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.72ms. Allocated memory is still 186.6MB. Free memory was 113.7MB in the beginning and 111.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.84ms. Allocated memory is still 186.6MB. Free memory was 111.6MB in the beginning and 110.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 442.59ms. Allocated memory was 186.6MB in the beginning and 303.0MB in the end (delta: 116.4MB). Free memory was 110.1MB in the beginning and 259.1MB in the end (delta: -149.0MB). Peak memory consumption was 16.5MB. Max. memory is 8.0GB. * TraceAbstraction took 566442.87ms. Allocated memory was 303.0MB in the beginning and 7.5GB in the end (delta: 7.2GB). Free memory was 258.6MB in the beginning and 2.6GB in the end (delta: -2.3GB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 30 PlacesBefore, 18 PlacesAfterwards, 27 TransitionsBefore, 14 TransitionsAfterwards, 270 CoEnabledTransitionPairs, 3 FixpointIterations, 3 TrivialSequentialCompositions, 13 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 1 ChoiceCompositions, 18 TotalNumberOfCompositions, 210 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 178, independent: 172, independent conditional: 0, independent unconditional: 172, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 138, independent: 133, independent conditional: 0, independent unconditional: 133, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 138, independent: 133, independent conditional: 0, independent unconditional: 133, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 17, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 178, independent: 39, independent conditional: 0, independent unconditional: 39, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 138, unknown conditional: 0, unknown unconditional: 138] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 681]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 7/47 universal loopers) in iteration 7,while PetriNetUnfolder was constructing finite prefix that currently has 29411 conditions, 8491 events (5360/8490 cut-off events. For 8542/8542 co-relation queries the response was YES. Maximal size of possible extension queue 2221. Compared 65097 event pairs, 497 based on Foata normal form. 0/10712 useless extension candidates. Maximal degree in co-relation 29313. Up to 3991 conditions per place.). - TimeoutResultAtElement [Line: 720]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 7/47 universal loopers) in iteration 7,while PetriNetUnfolder was constructing finite prefix that currently has 29411 conditions, 8491 events (5360/8490 cut-off events. For 8542/8542 co-relation queries the response was YES. Maximal size of possible extension queue 2221. Compared 65097 event pairs, 497 based on Foata normal form. 0/10712 useless extension candidates. Maximal degree in co-relation 29313. Up to 3991 conditions per place.). - TimeoutResultAtElement [Line: 721]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 7/47 universal loopers) in iteration 7,while PetriNetUnfolder was constructing finite prefix that currently has 29411 conditions, 8491 events (5360/8490 cut-off events. For 8542/8542 co-relation queries the response was YES. Maximal size of possible extension queue 2221. Compared 65097 event pairs, 497 based on Foata normal form. 0/10712 useless extension candidates. Maximal degree in co-relation 29313. Up to 3991 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 38 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: 566.4s, OverallIterations: 7, TraceHistogramMax: 12, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 558.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3755 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3755 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 955 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7721 IncrementalHoareTripleChecker+Invalid, 8676 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 955 mSolverCounterUnsat, 0 mSDtfsCounter, 7721 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 691 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 610 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50875 ImplicationChecksByTransitivity, 25.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212347occurred in iteration=6, InterpolantAutomatonStates: 387, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 2963 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1187 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 129/906 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown