/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-deagle/circular_buffer_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:41:44,645 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:41:44,686 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 12:41:44,723 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:41:44,723 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:41:44,724 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:41:44,724 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:41:44,724 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:41:44,725 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:41:44,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:41:44,728 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:41:44,728 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:41:44,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:41:44,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:41:44,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:41:44,730 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:41:44,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:41:44,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:41:44,730 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:41:44,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:41:44,730 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:41:44,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:41:44,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:41:44,731 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:41:44,731 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:41:44,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:41:44,733 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:41:44,733 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:41:44,733 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:41:44,733 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:41:44,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:41:44,734 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:41:44,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:41:44,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:41:44,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:41:44,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:41:44,946 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:41:44,946 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:41:44,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-11-17 12:41:46,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:41:46,262 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:41:46,263 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-11-17 12:41:46,273 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3009043e/32f65321bafc442eb5cf2c25f9250460/FLAG754bded30 [2023-11-17 12:41:46,287 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3009043e/32f65321bafc442eb5cf2c25f9250460 [2023-11-17 12:41:46,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:41:46,290 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:41:46,291 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:41:46,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:41:46,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:41:46,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f44917e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46, skipping insertion in model container [2023-11-17 12:41:46,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,340 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:41:46,536 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-deagle/circular_buffer_bad.i[30440,30453] [2023-11-17 12:41:46,547 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-deagle/circular_buffer_bad.i[30895,30908] [2023-11-17 12:41:46,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:41:46,566 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:41:46,599 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-deagle/circular_buffer_bad.i[30440,30453] [2023-11-17 12:41:46,608 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-deagle/circular_buffer_bad.i[30895,30908] [2023-11-17 12:41:46,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:41:46,649 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:41:46,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46 WrapperNode [2023-11-17 12:41:46,649 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:41:46,650 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:41:46,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:41:46,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:41:46,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,709 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 140 [2023-11-17 12:41:46,709 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:41:46,710 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:41:46,710 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:41:46,710 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:41:46,716 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,732 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,739 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:41:46,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:41:46,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:41:46,742 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:41:46,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (1/1) ... [2023-11-17 12:41:46,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:41:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:46,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 12:41:46,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 12:41:46,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:41:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-17 12:41:46,808 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-17 12:41:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-17 12:41:46,808 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-17 12:41:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:41:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 12:41:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:41:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:41:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:41:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-17 12:41:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:41:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 12:41:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:41:46,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:41:46,811 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:41:46,919 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:41:46,921 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:41:47,150 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:41:47,334 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:41:47,334 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:41:47,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:41:47 BoogieIcfgContainer [2023-11-17 12:41:47,335 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:41:47,337 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:41:47,337 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:41:47,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:41:47,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:41:46" (1/3) ... [2023-11-17 12:41:47,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef8f952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:41:47, skipping insertion in model container [2023-11-17 12:41:47,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:41:46" (2/3) ... [2023-11-17 12:41:47,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef8f952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:41:47, skipping insertion in model container [2023-11-17 12:41:47,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:41:47" (3/3) ... [2023-11-17 12:41:47,344 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-11-17 12:41:47,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:41:47,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 12:41:47,356 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:41:47,405 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:41:47,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 42 transitions, 98 flow [2023-11-17 12:41:47,445 INFO L124 PetriNetUnfolderBase]: 7/40 cut-off events. [2023-11-17 12:41:47,445 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:41:47,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 7/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 93 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2023-11-17 12:41:47,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 42 transitions, 98 flow [2023-11-17 12:41:47,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 38 transitions, 85 flow [2023-11-17 12:41:47,454 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:41:47,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 38 transitions, 85 flow [2023-11-17 12:41:47,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 38 transitions, 85 flow [2023-11-17 12:41:47,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 38 transitions, 85 flow [2023-11-17 12:41:47,472 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2023-11-17 12:41:47,472 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 12:41:47,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 38 events. 7/38 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2023-11-17 12:41:47,473 INFO L119 LiptonReduction]: Number of co-enabled transitions 662 [2023-11-17 12:41:57,379 INFO L134 LiptonReduction]: Checked pairs total: 2096 [2023-11-17 12:41:57,379 INFO L136 LiptonReduction]: Total number of compositions: 27 [2023-11-17 12:41:57,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:41:57,399 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;@641f9b1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:41:57,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 12:41:57,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:41:57,403 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 12:41:57,403 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 12:41:57,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:57,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 12:41:57,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:41:57,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash 11734628, now seen corresponding path program 1 times [2023-11-17 12:41:57,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:57,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516627221] [2023-11-17 12:41:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:57,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:41:57,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:57,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516627221] [2023-11-17 12:41:57,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516627221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:41:57,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:41:57,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:41:57,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726175339] [2023-11-17 12:41:57,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:41:57,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 12:41:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 12:41:57,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 12:41:57,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 69 [2023-11-17 12:41:57,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 61 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:57,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 69 [2023-11-17 12:41:57,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:57,735 INFO L124 PetriNetUnfolderBase]: 251/394 cut-off events. [2023-11-17 12:41:57,735 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-17 12:41:57,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 394 events. 251/394 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1326 event pairs, 165 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 730. Up to 395 conditions per place. [2023-11-17 12:41:57,740 INFO L140 encePairwiseOnDemand]: 68/69 looper letters, 24 selfloop transitions, 0 changer transitions 1/25 dead transitions. [2023-11-17 12:41:57,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 25 transitions, 109 flow [2023-11-17 12:41:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 12:41:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 12:41:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 52 transitions. [2023-11-17 12:41:57,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37681159420289856 [2023-11-17 12:41:57,749 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 52 transitions. [2023-11-17 12:41:57,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 52 transitions. [2023-11-17 12:41:57,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:57,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 52 transitions. [2023-11-17 12:41:57,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,756 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,757 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 61 flow. Second operand 2 states and 52 transitions. [2023-11-17 12:41:57,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 25 transitions, 109 flow [2023-11-17 12:41:57,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 12:41:57,760 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2023-11-17 12:41:57,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-17 12:41:57,763 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-11-17 12:41:57,763 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2023-11-17 12:41:57,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:57,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:57,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:41:57,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:41:57,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:57,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1664827958, now seen corresponding path program 1 times [2023-11-17 12:41:57,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:57,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15425540] [2023-11-17 12:41:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:57,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:41:57,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15425540] [2023-11-17 12:41:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15425540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:41:57,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:41:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:41:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422392113] [2023-11-17 12:41:57,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:41:57,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:41:57,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:41:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:41:57,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 69 [2023-11-17 12:41:57,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:57,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:57,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 69 [2023-11-17 12:41:57,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:58,005 INFO L124 PetriNetUnfolderBase]: 352/557 cut-off events. [2023-11-17 12:41:58,006 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 12:41:58,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 557 events. 352/557 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1884 event pairs, 126 based on Foata normal form. 16/445 useless extension candidates. Maximal degree in co-relation 1141. Up to 319 conditions per place. [2023-11-17 12:41:58,009 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 35 selfloop transitions, 4 changer transitions 3/42 dead transitions. [2023-11-17 12:41:58,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 42 transitions, 175 flow [2023-11-17 12:41:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:41:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:41:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2023-11-17 12:41:58,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3864734299516908 [2023-11-17 12:41:58,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2023-11-17 12:41:58,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2023-11-17 12:41:58,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:58,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2023-11-17 12:41:58,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,013 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 80 transitions. [2023-11-17 12:41:58,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 42 transitions, 175 flow [2023-11-17 12:41:58,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 42 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 12:41:58,014 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 76 flow [2023-11-17 12:41:58,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-17 12:41:58,015 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2023-11-17 12:41:58,016 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 76 flow [2023-11-17 12:41:58,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:58,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:58,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:41:58,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:41:58,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 696158753, now seen corresponding path program 1 times [2023-11-17 12:41:58,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:58,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362374659] [2023-11-17 12:41:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:41:58,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:58,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362374659] [2023-11-17 12:41:58,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362374659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:41:58,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:41:58,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:41:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504710763] [2023-11-17 12:41:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:41:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:41:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:41:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:41:58,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 69 [2023-11-17 12:41:58,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:58,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 69 [2023-11-17 12:41:58,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:58,214 INFO L124 PetriNetUnfolderBase]: 244/413 cut-off events. [2023-11-17 12:41:58,214 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 12:41:58,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 413 events. 244/413 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1492 event pairs, 64 based on Foata normal form. 12/367 useless extension candidates. Maximal degree in co-relation 926. Up to 254 conditions per place. [2023-11-17 12:41:58,216 INFO L140 encePairwiseOnDemand]: 63/69 looper letters, 30 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-11-17 12:41:58,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 171 flow [2023-11-17 12:41:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:41:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:41:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2023-11-17 12:41:58,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719806763285024 [2023-11-17 12:41:58,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 77 transitions. [2023-11-17 12:41:58,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 77 transitions. [2023-11-17 12:41:58,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:58,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 77 transitions. [2023-11-17 12:41:58,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,219 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 76 flow. Second operand 3 states and 77 transitions. [2023-11-17 12:41:58,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 171 flow [2023-11-17 12:41:58,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:41:58,220 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 84 flow [2023-11-17 12:41:58,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2023-11-17 12:41:58,221 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-17 12:41:58,221 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 84 flow [2023-11-17 12:41:58,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:58,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:58,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:41:58,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:41:58,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash 144652804, now seen corresponding path program 1 times [2023-11-17 12:41:58,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:58,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349823777] [2023-11-17 12:41:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:58,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:41:58,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349823777] [2023-11-17 12:41:58,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349823777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:41:58,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:41:58,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:41:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867958795] [2023-11-17 12:41:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:41:58,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:41:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:41:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:41:58,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 69 [2023-11-17 12:41:58,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:58,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 69 [2023-11-17 12:41:58,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:58,430 INFO L124 PetriNetUnfolderBase]: 292/501 cut-off events. [2023-11-17 12:41:58,430 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-17 12:41:58,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1225 conditions, 501 events. 292/501 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1665 event pairs, 119 based on Foata normal form. 8/455 useless extension candidates. Maximal degree in co-relation 1220. Up to 334 conditions per place. [2023-11-17 12:41:58,432 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 36 selfloop transitions, 2 changer transitions 4/42 dead transitions. [2023-11-17 12:41:58,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 215 flow [2023-11-17 12:41:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:41:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:41:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2023-11-17 12:41:58,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.357487922705314 [2023-11-17 12:41:58,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 74 transitions. [2023-11-17 12:41:58,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 74 transitions. [2023-11-17 12:41:58,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:58,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 74 transitions. [2023-11-17 12:41:58,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,434 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 84 flow. Second operand 3 states and 74 transitions. [2023-11-17 12:41:58,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 215 flow [2023-11-17 12:41:58,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 42 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:41:58,436 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 90 flow [2023-11-17 12:41:58,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-11-17 12:41:58,436 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-11-17 12:41:58,437 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 90 flow [2023-11-17 12:41:58,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:58,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:58,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:41:58,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:41:58,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash -999992730, now seen corresponding path program 1 times [2023-11-17 12:41:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:58,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488541220] [2023-11-17 12:41:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:58,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 12:41:58,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564409438] [2023-11-17 12:41:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:58,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:58,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:41:58,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:41:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:41:58,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:41:58,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:58,705 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:41:58,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-17 12:41:58,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-17 12:41:58,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-17 12:41:58,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 12:41:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:41:58,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:41:58,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:58,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488541220] [2023-11-17 12:41:58,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-17 12:41:58,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564409438] [2023-11-17 12:41:58,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564409438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:41:58,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:41:58,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:41:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084010812] [2023-11-17 12:41:58,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:41:58,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:41:58,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:41:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:41:58,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 69 [2023-11-17 12:41:58,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:58,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:58,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 69 [2023-11-17 12:41:58,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:41:59,131 INFO L124 PetriNetUnfolderBase]: 444/761 cut-off events. [2023-11-17 12:41:59,131 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-17 12:41:59,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 761 events. 444/761 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3079 event pairs, 133 based on Foata normal form. 24/699 useless extension candidates. Maximal degree in co-relation 1761. Up to 368 conditions per place. [2023-11-17 12:41:59,135 INFO L140 encePairwiseOnDemand]: 59/69 looper letters, 62 selfloop transitions, 12 changer transitions 6/80 dead transitions. [2023-11-17 12:41:59,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 80 transitions, 398 flow [2023-11-17 12:41:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:41:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:41:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2023-11-17 12:41:59,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3285024154589372 [2023-11-17 12:41:59,137 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 136 transitions. [2023-11-17 12:41:59,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 136 transitions. [2023-11-17 12:41:59,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:41:59,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 136 transitions. [2023-11-17 12:41:59,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,141 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,141 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 90 flow. Second operand 6 states and 136 transitions. [2023-11-17 12:41:59,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 80 transitions, 398 flow [2023-11-17 12:41:59,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 80 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:41:59,144 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 173 flow [2023-11-17 12:41:59,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-11-17 12:41:59,145 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2023-11-17 12:41:59,145 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 173 flow [2023-11-17 12:41:59,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:41:59,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:41:59,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 12:41:59,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:59,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:41:59,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:41:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1295591480, now seen corresponding path program 2 times [2023-11-17 12:41:59,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:41:59,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338636092] [2023-11-17 12:41:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:41:59,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:41:59,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 12:41:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855616789] [2023-11-17 12:41:59,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:41:59,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:41:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:41:59,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:41:59,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:41:59,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 12:41:59,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:41:59,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 12:41:59,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:41:59,683 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:41:59,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-17 12:41:59,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-17 12:41:59,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-17 12:41:59,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 12:41:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:41:59,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:41:59,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:41:59,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338636092] [2023-11-17 12:41:59,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-17 12:41:59,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855616789] [2023-11-17 12:41:59,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855616789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:41:59,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:41:59,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:41:59,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696735212] [2023-11-17 12:41:59,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:41:59,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:41:59,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:41:59,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:41:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:41:59,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 69 [2023-11-17 12:41:59,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 173 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:41:59,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:41:59,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 69 [2023-11-17 12:41:59,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:00,151 INFO L124 PetriNetUnfolderBase]: 604/1037 cut-off events. [2023-11-17 12:42:00,152 INFO L125 PetriNetUnfolderBase]: For 751/751 co-relation queries the response was YES. [2023-11-17 12:42:00,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1037 events. 604/1037 cut-off events. For 751/751 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4659 event pairs, 197 based on Foata normal form. 4/921 useless extension candidates. Maximal degree in co-relation 3046. Up to 484 conditions per place. [2023-11-17 12:42:00,157 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 65 selfloop transitions, 16 changer transitions 9/90 dead transitions. [2023-11-17 12:42:00,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 90 transitions, 557 flow [2023-11-17 12:42:00,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:42:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:42:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2023-11-17 12:42:00,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2023-11-17 12:42:00,159 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 135 transitions. [2023-11-17 12:42:00,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 135 transitions. [2023-11-17 12:42:00,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:00,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 135 transitions. [2023-11-17 12:42:00,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:00,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:00,161 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:00,161 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 173 flow. Second operand 6 states and 135 transitions. [2023-11-17 12:42:00,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 90 transitions, 557 flow [2023-11-17 12:42:00,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 90 transitions, 541 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 12:42:00,166 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 294 flow [2023-11-17 12:42:00,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-11-17 12:42:00,168 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2023-11-17 12:42:00,168 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 294 flow [2023-11-17 12:42:00,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:00,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:00,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:42:00,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 12:42:00,373 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,SelfDestructingSolverStorable5 [2023-11-17 12:42:00,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:42:00,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash -22540410, now seen corresponding path program 3 times [2023-11-17 12:42:00,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:00,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249048048] [2023-11-17 12:42:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:00,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:00,386 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 12:42:00,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673402782] [2023-11-17 12:42:00,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:42:00,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:00,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:42:00,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:42:00,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 12:42:00,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:42:00,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:42:00,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:00,623 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:42:00,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-17 12:42:00,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-17 12:42:00,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-17 12:42:00,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 12:42:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:42:00,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:42:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:42:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249048048] [2023-11-17 12:42:00,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-17 12:42:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673402782] [2023-11-17 12:42:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673402782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:42:00,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:42:00,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:42:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970809020] [2023-11-17 12:42:00,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:42:00,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:42:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:42:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:42:00,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 69 [2023-11-17 12:42:00,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:00,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:00,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 69 [2023-11-17 12:42:00,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:01,032 INFO L124 PetriNetUnfolderBase]: 773/1318 cut-off events. [2023-11-17 12:42:01,032 INFO L125 PetriNetUnfolderBase]: For 1845/1845 co-relation queries the response was YES. [2023-11-17 12:42:01,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4282 conditions, 1318 events. 773/1318 cut-off events. For 1845/1845 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6295 event pairs, 184 based on Foata normal form. 12/1174 useless extension candidates. Maximal degree in co-relation 4268. Up to 404 conditions per place. [2023-11-17 12:42:01,038 INFO L140 encePairwiseOnDemand]: 59/69 looper letters, 76 selfloop transitions, 23 changer transitions 5/104 dead transitions. [2023-11-17 12:42:01,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 104 transitions, 729 flow [2023-11-17 12:42:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:42:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:42:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2023-11-17 12:42:01,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2023-11-17 12:42:01,039 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 144 transitions. [2023-11-17 12:42:01,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 144 transitions. [2023-11-17 12:42:01,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:01,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 144 transitions. [2023-11-17 12:42:01,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:01,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:01,040 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:01,040 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 294 flow. Second operand 6 states and 144 transitions. [2023-11-17 12:42:01,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 104 transitions, 729 flow [2023-11-17 12:42:01,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 104 transitions, 711 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-11-17 12:42:01,046 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 415 flow [2023-11-17 12:42:01,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=415, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2023-11-17 12:42:01,047 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2023-11-17 12:42:01,047 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 415 flow [2023-11-17 12:42:01,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:01,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:01,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:42:01,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 12:42:01,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:01,253 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:42:01,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:01,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1207842856, now seen corresponding path program 4 times [2023-11-17 12:42:01,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:01,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547941771] [2023-11-17 12:42:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:01,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:01,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 12:42:01,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541656896] [2023-11-17 12:42:01,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:42:01,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:01,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:01,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:42:01,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:42:01,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:42:01,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:42:01,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:42:01,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:01,506 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-17 12:42:01,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-11-17 12:42:01,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-11-17 12:42:01,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 12:42:01,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-17 12:42:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:42:01,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:42:01,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:42:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547941771] [2023-11-17 12:42:01,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-17 12:42:01,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541656896] [2023-11-17 12:42:01,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541656896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:42:01,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:42:01,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:42:01,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232101197] [2023-11-17 12:42:01,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:42:01,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:42:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:42:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:42:01,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 69 [2023-11-17 12:42:01,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 55 transitions, 415 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:01,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:01,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 69 [2023-11-17 12:42:01,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:02,005 INFO L124 PetriNetUnfolderBase]: 931/1578 cut-off events. [2023-11-17 12:42:02,005 INFO L125 PetriNetUnfolderBase]: For 3301/3301 co-relation queries the response was YES. [2023-11-17 12:42:02,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 1578 events. 931/1578 cut-off events. For 3301/3301 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7699 event pairs, 222 based on Foata normal form. 19/1422 useless extension candidates. Maximal degree in co-relation 5500. Up to 492 conditions per place. [2023-11-17 12:42:02,012 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 77 selfloop transitions, 29 changer transitions 5/111 dead transitions. [2023-11-17 12:42:02,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 111 transitions, 882 flow [2023-11-17 12:42:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:42:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:42:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2023-11-17 12:42:02,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2023-11-17 12:42:02,014 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 144 transitions. [2023-11-17 12:42:02,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 144 transitions. [2023-11-17 12:42:02,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:02,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 144 transitions. [2023-11-17 12:42:02,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,015 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,015 INFO L175 Difference]: Start difference. First operand has 51 places, 55 transitions, 415 flow. Second operand 6 states and 144 transitions. [2023-11-17 12:42:02,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 111 transitions, 882 flow [2023-11-17 12:42:02,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 111 transitions, 848 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 12:42:02,023 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 550 flow [2023-11-17 12:42:02,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2023-11-17 12:42:02,025 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2023-11-17 12:42:02,025 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 550 flow [2023-11-17 12:42:02,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:02,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:42:02,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 12:42:02,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:02,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:42:02,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:02,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1786569515, now seen corresponding path program 1 times [2023-11-17 12:42:02,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:02,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716846433] [2023-11-17 12:42:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:02,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 12:42:02,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064631503] [2023-11-17 12:42:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:02,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:02,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:42:02,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:42:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:42:02,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-17 12:42:02,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:42:02,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:42:02,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:42:02,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716846433] [2023-11-17 12:42:02,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-17 12:42:02,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064631503] [2023-11-17 12:42:02,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064631503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:42:02,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:42:02,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:42:02,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239365915] [2023-11-17 12:42:02,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:42:02,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:42:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:42:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:42:02,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 69 [2023-11-17 12:42:02,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 550 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:02,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 69 [2023-11-17 12:42:02,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:02,556 INFO L124 PetriNetUnfolderBase]: 875/1524 cut-off events. [2023-11-17 12:42:02,557 INFO L125 PetriNetUnfolderBase]: For 4173/4173 co-relation queries the response was YES. [2023-11-17 12:42:02,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 1524 events. 875/1524 cut-off events. For 4173/4173 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7372 event pairs, 236 based on Foata normal form. 59/1400 useless extension candidates. Maximal degree in co-relation 5395. Up to 1268 conditions per place. [2023-11-17 12:42:02,563 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 56 selfloop transitions, 3 changer transitions 16/75 dead transitions. [2023-11-17 12:42:02,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 725 flow [2023-11-17 12:42:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:42:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:42:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-17 12:42:02,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671497584541063 [2023-11-17 12:42:02,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-17 12:42:02,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-17 12:42:02,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:02,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-17 12:42:02,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,565 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 550 flow. Second operand 3 states and 76 transitions. [2023-11-17 12:42:02,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 725 flow [2023-11-17 12:42:02,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 677 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-17 12:42:02,570 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 390 flow [2023-11-17 12:42:02,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=390, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-17 12:42:02,571 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2023-11-17 12:42:02,571 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 390 flow [2023-11-17 12:42:02,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:02,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:42:02,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:42:02,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:02,792 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:42:02,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash -18808814, now seen corresponding path program 1 times [2023-11-17 12:42:02,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:02,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112673891] [2023-11-17 12:42:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:02,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:02,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 12:42:02,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972423125] [2023-11-17 12:42:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:02,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:02,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:02,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:42:02,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:42:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:42:02,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:42:02,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:42:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:42:02,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:42:02,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:42:02,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112673891] [2023-11-17 12:42:02,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-17 12:42:02,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972423125] [2023-11-17 12:42:02,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972423125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:42:02,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:42:02,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:42:02,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20171782] [2023-11-17 12:42:02,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:42:02,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:42:02,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:42:02,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:42:02,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:42:02,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 69 [2023-11-17 12:42:02,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:02,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:42:02,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 69 [2023-11-17 12:42:02,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:42:03,054 INFO L124 PetriNetUnfolderBase]: 426/777 cut-off events. [2023-11-17 12:42:03,054 INFO L125 PetriNetUnfolderBase]: For 2012/2012 co-relation queries the response was YES. [2023-11-17 12:42:03,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2986 conditions, 777 events. 426/777 cut-off events. For 2012/2012 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3253 event pairs, 124 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 2965. Up to 521 conditions per place. [2023-11-17 12:42:03,057 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 49 selfloop transitions, 4 changer transitions 5/58 dead transitions. [2023-11-17 12:42:03,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 535 flow [2023-11-17 12:42:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:42:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:42:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2023-11-17 12:42:03,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2898550724637681 [2023-11-17 12:42:03,058 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 80 transitions. [2023-11-17 12:42:03,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 80 transitions. [2023-11-17 12:42:03,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:42:03,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 80 transitions. [2023-11-17 12:42:03,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:03,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:03,059 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:03,059 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 390 flow. Second operand 4 states and 80 transitions. [2023-11-17 12:42:03,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 535 flow [2023-11-17 12:42:03,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 511 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 12:42:03,063 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 334 flow [2023-11-17 12:42:03,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-11-17 12:42:03,064 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2023-11-17 12:42:03,064 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 334 flow [2023-11-17 12:42:03,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:42:03,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:42:03,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:42:03,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:42:03,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:03,269 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 12:42:03,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:42:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1356512562, now seen corresponding path program 2 times [2023-11-17 12:42:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:42:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303081362] [2023-11-17 12:42:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:42:03,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:42:03,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-17 12:42:03,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147458084] [2023-11-17 12:42:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:42:03,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:03,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:42:03,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:42:03,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:42:03,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:42:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-17 12:42:03,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 12:42:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 12:42:03,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 12:42:03,581 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 12:42:03,582 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-17 12:42:03,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-17 12:42:03,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-17 12:42:03,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 12:42:03,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 12:42:03,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 12:42:03,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:42:03,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:42:03,784 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1] [2023-11-17 12:42:03,788 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:42:03,788 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:42:03,814 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-17 12:42:03,815 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre13 could not be translated [2023-11-17 12:42:03,816 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-11-17 12:42:03,816 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-11-17 12:42:03,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:42:03 BasicIcfg [2023-11-17 12:42:03,822 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:42:03,822 INFO L158 Benchmark]: Toolchain (without parser) took 17532.24ms. Allocated memory was 199.2MB in the beginning and 287.3MB in the end (delta: 88.1MB). Free memory was 146.9MB in the beginning and 228.5MB in the end (delta: -81.6MB). Peak memory consumption was 7.4MB. Max. memory is 8.0GB. [2023-11-17 12:42:03,822 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 199.2MB. Free memory is still 151.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:42:03,822 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.71ms. Allocated memory is still 199.2MB. Free memory was 146.4MB in the beginning and 126.0MB in the end (delta: 20.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-11-17 12:42:03,822 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.38ms. Allocated memory is still 199.2MB. Free memory was 126.0MB in the beginning and 123.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:42:03,823 INFO L158 Benchmark]: Boogie Preprocessor took 31.78ms. Allocated memory is still 199.2MB. Free memory was 123.8MB in the beginning and 121.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:42:03,823 INFO L158 Benchmark]: RCFGBuilder took 593.30ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 121.8MB in the beginning and 187.0MB in the end (delta: -65.2MB). Peak memory consumption was 36.9MB. Max. memory is 8.0GB. [2023-11-17 12:42:03,823 INFO L158 Benchmark]: TraceAbstraction took 16484.91ms. Allocated memory was 239.1MB in the beginning and 287.3MB in the end (delta: 48.2MB). Free memory was 186.0MB in the beginning and 228.5MB in the end (delta: -42.6MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2023-11-17 12:42:03,824 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 199.2MB. Free memory is still 151.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 358.71ms. Allocated memory is still 199.2MB. Free memory was 146.4MB in the beginning and 126.0MB in the end (delta: 20.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 59.38ms. Allocated memory is still 199.2MB. Free memory was 126.0MB in the beginning and 123.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.78ms. Allocated memory is still 199.2MB. Free memory was 123.8MB in the beginning and 121.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 593.30ms. Allocated memory was 199.2MB in the beginning and 239.1MB in the end (delta: 39.8MB). Free memory was 121.8MB in the beginning and 187.0MB in the end (delta: -65.2MB). Peak memory consumption was 36.9MB. Max. memory is 8.0GB. * TraceAbstraction took 16484.91ms. Allocated memory was 239.1MB in the beginning and 287.3MB in the end (delta: 48.2MB). Free memory was 186.0MB in the beginning and 228.5MB in the end (delta: -42.6MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.9s, 38 PlacesBefore, 28 PlacesAfterwards, 38 TransitionsBefore, 26 TransitionsAfterwards, 662 CoEnabledTransitionPairs, 4 FixpointIterations, 0 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 2 ChoiceCompositions, 27 TotalNumberOfCompositions, 2096 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1178, independent: 1073, independent conditional: 0, independent unconditional: 1073, dependent: 95, dependent conditional: 0, dependent unconditional: 95, unknown: 10, unknown conditional: 0, unknown unconditional: 10] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 461, independent: 423, independent conditional: 0, independent unconditional: 423, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 461, independent: 399, independent conditional: 0, independent unconditional: 399, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 62, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 4, unknown conditional: 0, unknown unconditional: 4] , SemanticIndependenceRelation.Query Time [ms]: [ total: 8891, independent: 74, independent conditional: 0, independent unconditional: 74, dependent: 223, dependent conditional: 0, dependent unconditional: 223, unknown: 8594, unknown conditional: 0, unknown unconditional: 8594] ], Cache Queries: [ total: 1178, independent: 650, independent conditional: 0, independent unconditional: 650, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 467, unknown conditional: 0, unknown unconditional: 467] , Statistics on independence cache: Total cache size (in pairs): 127, Positive cache size: 114, Positive conditional cache size: 0, Positive unconditional cache size: 114, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 2, Unknown conditional cache size: 0, Unknown unconditional cache size: 2 - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 64 locations, 6 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: 16.4s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 287 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 287 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1067 IncrementalHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 0 mSDtfsCounter, 1067 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=550occurred in iteration=8, InterpolantAutomatonStates: 42, 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, 0.8s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 1215 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1314 ConjunctsInSsa, 137 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 3/3 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 proved your program to be incorrect! [2023-11-17 12:42:03,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...