/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:14:07,304 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:14:07,361 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-VariableLbe.epf [2023-08-24 08:14:07,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:14:07,366 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:14:07,396 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:14:07,397 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:14:07,397 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:14:07,397 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:14:07,400 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:14:07,402 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:14:07,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:14:07,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:14:07,402 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:14:07,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:14:07,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:14:07,403 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:14:07,403 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:14:07,403 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:14:07,403 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:14:07,403 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:14:07,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:14:07,406 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:14:07,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:14:07,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:14:07,406 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:14:07,406 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:14:07,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:14:07,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:14:07,407 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:14:07,407 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:14:07,407 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:14:07,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:14:07,407 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:14:07,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:14:07,407 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:14:07,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:14:07,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:14:07,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:14:07,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:14:07,663 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:14:07,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2023-08-24 08:14:08,569 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:14:08,703 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:14:08,704 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c [2023-08-24 08:14:08,708 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35fe1cf7e/73a8a11c3a264ea987b814bbb36afca6/FLAGaa0ce3367 [2023-08-24 08:14:08,717 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35fe1cf7e/73a8a11c3a264ea987b814bbb36afca6 [2023-08-24 08:14:08,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:14:08,719 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:14:08,720 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:14:08,720 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:14:08,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:14:08,722 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560d1918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08, skipping insertion in model container [2023-08-24 08:14:08,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,736 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:14:08,858 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c[2332,2345] [2023-08-24 08:14:08,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:14:08,866 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:14:08,889 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2-unrolled.wvr.c[2332,2345] [2023-08-24 08:14:08,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:14:08,897 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:14:08,897 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:14:08,902 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:14:08,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08 WrapperNode [2023-08-24 08:14:08,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:14:08,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:14:08,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:14:08,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:14:08,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,920 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,937 INFO L138 Inliner]: procedures = 20, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2023-08-24 08:14:08,937 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:14:08,938 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:14:08,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:14:08,939 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:14:08,944 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,947 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,947 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,960 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,962 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,963 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,964 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:14:08,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:14:08,965 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:14:08,965 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:14:08,965 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (1/1) ... [2023-08-24 08:14:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:14:08,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:14:08,988 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) [2023-08-24 08:14:08,999 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 [2023-08-24 08:14:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:14:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:14:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:14:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:14:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:14:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:14:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:14:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:14:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 08:14:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 08:14:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:14:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:14:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:14:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:14:09,022 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 08:14:09,104 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:14:09,105 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:14:09,243 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:14:09,260 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:14:09,261 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 08:14:09,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:14:09 BoogieIcfgContainer [2023-08-24 08:14:09,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:14:09,264 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:14:09,264 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:14:09,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:14:09,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:14:08" (1/3) ... [2023-08-24 08:14:09,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d484133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:14:09, skipping insertion in model container [2023-08-24 08:14:09,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:14:08" (2/3) ... [2023-08-24 08:14:09,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d484133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:14:09, skipping insertion in model container [2023-08-24 08:14:09,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:14:09" (3/3) ... [2023-08-24 08:14:09,267 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2-unrolled.wvr.c [2023-08-24 08:14:09,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:14:09,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:14:09,284 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:14:09,360 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 08:14:09,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 206 flow [2023-08-24 08:14:09,450 INFO L124 PetriNetUnfolderBase]: 6/93 cut-off events. [2023-08-24 08:14:09,450 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:14:09,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-08-24 08:14:09,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 95 transitions, 206 flow [2023-08-24 08:14:09,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 182 flow [2023-08-24 08:14:09,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:14:09,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 85 transitions, 182 flow [2023-08-24 08:14:09,471 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 85 transitions, 182 flow [2023-08-24 08:14:09,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 182 flow [2023-08-24 08:14:09,495 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-24 08:14:09,495 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:14:09,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-08-24 08:14:09,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 728 [2023-08-24 08:14:11,301 INFO L134 LiptonReduction]: Checked pairs total: 869 [2023-08-24 08:14:11,301 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-08-24 08:14:11,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:14:11,314 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=LoopsAndPotentialCycles, 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;@2d4d2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:14:11,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 08:14:11,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:14:11,318 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 08:14:11,318 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:14:11,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:14:11,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:14:11,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:14:11,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:14:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1786021943, now seen corresponding path program 1 times [2023-08-24 08:14:11,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:14:11,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153417734] [2023-08-24 08:14:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:14:11,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:14:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:14:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:14:11,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:14:11,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153417734] [2023-08-24 08:14:11,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153417734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:14:11,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:14:11,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 08:14:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355256789] [2023-08-24 08:14:11,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:14:11,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:14:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:14:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:14:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:14:11,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 175 [2023-08-24 08:14:11,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:11,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:14:11,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 175 [2023-08-24 08:14:11,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:14:11,749 INFO L124 PetriNetUnfolderBase]: 60/110 cut-off events. [2023-08-24 08:14:11,749 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-24 08:14:11,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 110 events. 60/110 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 292 event pairs, 9 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 180. Up to 84 conditions per place. [2023-08-24 08:14:11,751 INFO L140 encePairwiseOnDemand]: 171/175 looper letters, 21 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-24 08:14:11,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-08-24 08:14:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:14:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:14:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-08-24 08:14:11,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4038095238095238 [2023-08-24 08:14:11,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-08-24 08:14:11,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-08-24 08:14:11,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:14:11,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-08-24 08:14:11,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:11,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:11,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:11,777 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 212 transitions. [2023-08-24 08:14:11,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-08-24 08:14:11,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 08:14:11,779 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-08-24 08:14:11,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-24 08:14:11,783 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 08:14:11,783 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-08-24 08:14:11,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:11,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:14:11,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:14:11,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:14:11,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:14:11,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:14:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1638161831, now seen corresponding path program 1 times [2023-08-24 08:14:11,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:14:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385832929] [2023-08-24 08:14:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:14:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:14:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:14:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:14:11,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:14:11,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385832929] [2023-08-24 08:14:11,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385832929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:14:11,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:14:11,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 08:14:11,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348840357] [2023-08-24 08:14:11,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:14:11,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:14:11,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:14:11,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:14:11,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:14:11,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-08-24 08:14:11,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:11,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:14:11,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-08-24 08:14:11,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:14:12,064 INFO L124 PetriNetUnfolderBase]: 84/153 cut-off events. [2023-08-24 08:14:12,064 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-24 08:14:12,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 153 events. 84/153 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 447 event pairs, 27 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 82. Up to 84 conditions per place. [2023-08-24 08:14:12,066 INFO L140 encePairwiseOnDemand]: 170/175 looper letters, 19 selfloop transitions, 7 changer transitions 7/33 dead transitions. [2023-08-24 08:14:12,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 33 transitions, 161 flow [2023-08-24 08:14:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:14:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:14:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 344 transitions. [2023-08-24 08:14:12,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2023-08-24 08:14:12,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 344 transitions. [2023-08-24 08:14:12,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 344 transitions. [2023-08-24 08:14:12,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:14:12,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 344 transitions. [2023-08-24 08:14:12,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,075 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,075 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 4 states and 344 transitions. [2023-08-24 08:14:12,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 33 transitions, 161 flow [2023-08-24 08:14:12,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 33 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 08:14:12,077 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 96 flow [2023-08-24 08:14:12,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-24 08:14:12,078 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-24 08:14:12,079 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 96 flow [2023-08-24 08:14:12,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:14:12,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:14:12,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:14:12,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:14:12,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:14:12,087 INFO L85 PathProgramCache]: Analyzing trace with hash -237269058, now seen corresponding path program 1 times [2023-08-24 08:14:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:14:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673446017] [2023-08-24 08:14:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:14:12,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:14:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:14:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:14:12,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:14:12,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673446017] [2023-08-24 08:14:12,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673446017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:14:12,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:14:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 08:14:12,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346111406] [2023-08-24 08:14:12,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:14:12,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:14:12,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:14:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:14:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:14:12,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 175 [2023-08-24 08:14:12,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:14:12,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 175 [2023-08-24 08:14:12,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:14:12,257 INFO L124 PetriNetUnfolderBase]: 104/191 cut-off events. [2023-08-24 08:14:12,258 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-24 08:14:12,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 191 events. 104/191 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 632 event pairs, 9 based on Foata normal form. 2/193 useless extension candidates. Maximal degree in co-relation 287. Up to 66 conditions per place. [2023-08-24 08:14:12,262 INFO L140 encePairwiseOnDemand]: 168/175 looper letters, 32 selfloop transitions, 9 changer transitions 10/51 dead transitions. [2023-08-24 08:14:12,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 51 transitions, 306 flow [2023-08-24 08:14:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:14:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:14:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 367 transitions. [2023-08-24 08:14:12,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41942857142857143 [2023-08-24 08:14:12,263 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 367 transitions. [2023-08-24 08:14:12,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 367 transitions. [2023-08-24 08:14:12,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:14:12,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 367 transitions. [2023-08-24 08:14:12,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,266 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 96 flow. Second operand 5 states and 367 transitions. [2023-08-24 08:14:12,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 51 transitions, 306 flow [2023-08-24 08:14:12,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 51 transitions, 302 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 08:14:12,268 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 168 flow [2023-08-24 08:14:12,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-08-24 08:14:12,269 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2023-08-24 08:14:12,269 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 168 flow [2023-08-24 08:14:12,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:14:12,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:14:12,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 08:14:12,270 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:14:12,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:14:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash 599928642, now seen corresponding path program 2 times [2023-08-24 08:14:12,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:14:12,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107230080] [2023-08-24 08:14:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:14:12,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:14:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:14:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:14:12,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:14:12,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107230080] [2023-08-24 08:14:12,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107230080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:14:12,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:14:12,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 08:14:12,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960942607] [2023-08-24 08:14:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:14:12,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:14:12,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:14:12,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:14:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:14:12,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 175 [2023-08-24 08:14:12,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:14:12,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 175 [2023-08-24 08:14:12,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:14:12,409 INFO L124 PetriNetUnfolderBase]: 91/169 cut-off events. [2023-08-24 08:14:12,409 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2023-08-24 08:14:12,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 169 events. 91/169 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 505 event pairs, 11 based on Foata normal form. 10/179 useless extension candidates. Maximal degree in co-relation 237. Up to 84 conditions per place. [2023-08-24 08:14:12,411 INFO L140 encePairwiseOnDemand]: 170/175 looper letters, 26 selfloop transitions, 11 changer transitions 1/38 dead transitions. [2023-08-24 08:14:12,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 286 flow [2023-08-24 08:14:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:14:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:14:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-08-24 08:14:12,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842857142857143 [2023-08-24 08:14:12,412 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-08-24 08:14:12,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-08-24 08:14:12,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:14:12,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-08-24 08:14:12,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,414 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,414 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 168 flow. Second operand 4 states and 269 transitions. [2023-08-24 08:14:12,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 286 flow [2023-08-24 08:14:12,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 280 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-24 08:14:12,419 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 216 flow [2023-08-24 08:14:12,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2023-08-24 08:14:12,420 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-08-24 08:14:12,420 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 216 flow [2023-08-24 08:14:12,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:14:12,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:14:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 08:14:12,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:14:12,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:14:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -227819690, now seen corresponding path program 1 times [2023-08-24 08:14:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:14:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40643953] [2023-08-24 08:14:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:14:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:14:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:14:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:14:12,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:14:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40643953] [2023-08-24 08:14:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40643953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:14:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239840029] [2023-08-24 08:14:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:14:12,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:14:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:14:12,630 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) [2023-08-24 08:14:12,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 08:14:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:14:12,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:14:12,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:14:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:14:12,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:14:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:14:12,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239840029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:14:12,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:14:12,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2023-08-24 08:14:12,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575802277] [2023-08-24 08:14:12,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:14:12,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 08:14:12,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:14:12,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 08:14:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 08:14:12,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 175 [2023-08-24 08:14:12,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:14:12,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 175 [2023-08-24 08:14:12,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:14:12,880 INFO L124 PetriNetUnfolderBase]: 123/226 cut-off events. [2023-08-24 08:14:12,881 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2023-08-24 08:14:12,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 226 events. 123/226 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 740 event pairs, 16 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 315. Up to 84 conditions per place. [2023-08-24 08:14:12,882 INFO L140 encePairwiseOnDemand]: 169/175 looper letters, 26 selfloop transitions, 17 changer transitions 12/55 dead transitions. [2023-08-24 08:14:12,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 470 flow [2023-08-24 08:14:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:14:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:14:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 413 transitions. [2023-08-24 08:14:12,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2023-08-24 08:14:12,883 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 413 transitions. [2023-08-24 08:14:12,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 413 transitions. [2023-08-24 08:14:12,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:14:12,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 413 transitions. [2023-08-24 08:14:12,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,886 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,886 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 216 flow. Second operand 6 states and 413 transitions. [2023-08-24 08:14:12,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 470 flow [2023-08-24 08:14:12,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 444 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 08:14:12,888 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 327 flow [2023-08-24 08:14:12,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-08-24 08:14:12,889 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-08-24 08:14:12,889 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 327 flow [2023-08-24 08:14:12,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:12,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:14:12,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:14:12,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 08:14:13,094 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 [2023-08-24 08:14:13,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:14:13,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:14:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash -66515524, now seen corresponding path program 2 times [2023-08-24 08:14:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:14:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422878191] [2023-08-24 08:14:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:14:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:14:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:14:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:14:13,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:14:13,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422878191] [2023-08-24 08:14:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422878191] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:14:13,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256349748] [2023-08-24 08:14:13,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:14:13,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:14:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:14:13,257 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) [2023-08-24 08:14:13,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 08:14:13,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:14:13,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:14:13,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:14:13,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:14:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 08:14:13,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 08:14:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256349748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:14:13,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 08:14:13,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-08-24 08:14:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687917032] [2023-08-24 08:14:13,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:14:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:14:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:14:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:14:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 08:14:13,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-08-24 08:14:13,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 327 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:13,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:14:13,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-08-24 08:14:13,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:14:13,434 INFO L124 PetriNetUnfolderBase]: 140/260 cut-off events. [2023-08-24 08:14:13,435 INFO L125 PetriNetUnfolderBase]: For 942/942 co-relation queries the response was YES. [2023-08-24 08:14:13,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 260 events. 140/260 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 901 event pairs, 32 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 769. Up to 179 conditions per place. [2023-08-24 08:14:13,436 INFO L140 encePairwiseOnDemand]: 169/175 looper letters, 37 selfloop transitions, 17 changer transitions 3/57 dead transitions. [2023-08-24 08:14:13,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 584 flow [2023-08-24 08:14:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:14:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:14:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2023-08-24 08:14:13,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48342857142857143 [2023-08-24 08:14:13,437 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2023-08-24 08:14:13,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2023-08-24 08:14:13,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:14:13,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2023-08-24 08:14:13,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:13,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:13,440 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:13,440 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 327 flow. Second operand 5 states and 423 transitions. [2023-08-24 08:14:13,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 584 flow [2023-08-24 08:14:13,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 534 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-08-24 08:14:13,443 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 465 flow [2023-08-24 08:14:13,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=465, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-24 08:14:13,443 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-08-24 08:14:13,444 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 465 flow [2023-08-24 08:14:13,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:13,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:14:13,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:14:13,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 08:14:13,650 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 [2023-08-24 08:14:13,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:14:13,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:14:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1627690428, now seen corresponding path program 3 times [2023-08-24 08:14:13,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:14:13,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870449726] [2023-08-24 08:14:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:14:13,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:14:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:14:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:14:13,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:14:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870449726] [2023-08-24 08:14:13,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870449726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:14:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381690566] [2023-08-24 08:14:13,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:14:13,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:14:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:14:13,747 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) [2023-08-24 08:14:13,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 08:14:13,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:14:13,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:14:13,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:14:13,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:14:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:14:13,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:14:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:14:13,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381690566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:14:13,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:14:13,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-24 08:14:13,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586131005] [2023-08-24 08:14:13,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:14:13,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 08:14:13,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:14:13,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 08:14:13,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 08:14:13,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 175 [2023-08-24 08:14:13,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 80.5) internal successors, (483), 6 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) [2023-08-24 08:14:13,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:14:13,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 175 [2023-08-24 08:14:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:14:13,952 INFO L124 PetriNetUnfolderBase]: 140/259 cut-off events. [2023-08-24 08:14:13,953 INFO L125 PetriNetUnfolderBase]: For 1091/1091 co-relation queries the response was YES. [2023-08-24 08:14:13,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 259 events. 140/259 cut-off events. For 1091/1091 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 911 event pairs, 38 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 955. Up to 137 conditions per place. [2023-08-24 08:14:13,954 INFO L140 encePairwiseOnDemand]: 169/175 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2023-08-24 08:14:13,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 642 flow [2023-08-24 08:14:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:14:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:14:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 496 transitions. [2023-08-24 08:14:13,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723809523809524 [2023-08-24 08:14:13,955 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 496 transitions. [2023-08-24 08:14:13,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 496 transitions. [2023-08-24 08:14:13,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:14:13,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 496 transitions. [2023-08-24 08:14:13,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:13,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:13,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:14:13,958 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 465 flow. Second operand 6 states and 496 transitions. [2023-08-24 08:14:13,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 642 flow [2023-08-24 08:14:13,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 626 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-24 08:14:13,961 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-24 08:14:13,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-24 08:14:13,962 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-24 08:14:13,962 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-24 08:14:13,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.5) internal successors, (483), 6 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) [2023-08-24 08:14:13,964 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 08:14:13,964 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 08:14:13,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 08:14:13,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 08:14:14,168 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 [2023-08-24 08:14:14,169 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1] [2023-08-24 08:14:14,171 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 08:14:14,171 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 08:14:14,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 08:14:14 BasicIcfg [2023-08-24 08:14:14,179 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 08:14:14,179 INFO L158 Benchmark]: Toolchain (without parser) took 5459.91ms. Allocated memory was 434.1MB in the beginning and 557.8MB in the end (delta: 123.7MB). Free memory was 408.2MB in the beginning and 509.3MB in the end (delta: -101.1MB). Peak memory consumption was 24.8MB. Max. memory is 16.0GB. [2023-08-24 08:14:14,179 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 434.1MB. Free memory is still 411.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:14:14,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.77ms. Allocated memory is still 434.1MB. Free memory was 408.2MB in the beginning and 397.0MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 08:14:14,180 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.32ms. Allocated memory is still 434.1MB. Free memory was 397.0MB in the beginning and 394.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:14:14,180 INFO L158 Benchmark]: Boogie Preprocessor took 25.96ms. Allocated memory is still 434.1MB. Free memory was 394.9MB in the beginning and 393.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:14:14,180 INFO L158 Benchmark]: RCFGBuilder took 297.32ms. Allocated memory is still 434.1MB. Free memory was 393.7MB in the beginning and 379.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 08:14:14,180 INFO L158 Benchmark]: TraceAbstraction took 4915.29ms. Allocated memory was 434.1MB in the beginning and 557.8MB in the end (delta: 123.7MB). Free memory was 379.0MB in the beginning and 509.3MB in the end (delta: -130.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:14:14,181 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 434.1MB. Free memory is still 411.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 182.77ms. Allocated memory is still 434.1MB. Free memory was 408.2MB in the beginning and 397.0MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.32ms. Allocated memory is still 434.1MB. Free memory was 397.0MB in the beginning and 394.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.96ms. Allocated memory is still 434.1MB. Free memory was 394.9MB in the beginning and 393.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 297.32ms. Allocated memory is still 434.1MB. Free memory was 393.7MB in the beginning and 379.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4915.29ms. Allocated memory was 434.1MB in the beginning and 557.8MB in the end (delta: 123.7MB). Free memory was 379.0MB in the beginning and 509.3MB in the end (delta: -130.3MB). There was no memory consumed. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 86 PlacesBefore, 20 PlacesAfterwards, 85 TransitionsBefore, 15 TransitionsAfterwards, 728 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 80 TotalNumberOfCompositions, 869 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 745, independent: 721, independent conditional: 0, independent unconditional: 721, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 401, independent: 394, independent conditional: 0, independent unconditional: 394, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 745, independent: 327, independent conditional: 0, independent unconditional: 327, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 401, unknown conditional: 0, unknown unconditional: 401] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 87]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 116 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.8s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 493 IncrementalHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 0 mSDtfsCounter, 493 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=465occurred in iteration=6, InterpolantAutomatonStates: 33, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 158 ConstructedInterpolants, 0 QuantifiedInterpolants, 1723 SizeOfPredicates, 12 NumberOfNonLiveVariables, 363 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 9/19 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 08:14:14,191 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...