/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 PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:36:56,651 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:36:56,709 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 12:36:56,712 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:36:56,712 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:36:56,738 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:36:56,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:36:56,739 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:36:56,739 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:36:56,742 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:36:56,742 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:36:56,742 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:36:56,742 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:36:56,743 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:36:56,743 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:36:56,744 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:36:56,744 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:36:56,744 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:36:56,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:36:56,744 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:36:56,744 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:36:56,745 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:36:56,745 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:36:56,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:36:56,745 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:36:56,746 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:36:56,746 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:36:56,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:36:56,746 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:36:56,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:36:56,747 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:36:56,747 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:36:56,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:36:56,747 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:36:56,747 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:36:56,748 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:36:56,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:36:56,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:36:56,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:36:56,999 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:36:57,000 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:36:57,001 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-08-24 12:36:57,897 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:36:58,081 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:36:58,081 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-08-24 12:36:58,102 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6cb9e53e/d7e7f7dd3a654573b5bf6fe49bbb62a1/FLAGf993b0e60 [2023-08-24 12:36:58,112 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6cb9e53e/d7e7f7dd3a654573b5bf6fe49bbb62a1 [2023-08-24 12:36:58,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:36:58,115 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:36:58,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:36:58,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:36:58,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:36:58,118 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@203c8120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58, skipping insertion in model container [2023-08-24 12:36:58,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,157 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:36:58,478 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2023-08-24 12:36:58,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:36:58,507 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:36:58,520 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [119] [2023-08-24 12:36:58,536 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [481] [2023-08-24 12:36:58,536 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [481] [2023-08-24 12:36:58,544 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2023-08-24 12:36:58,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:36:58,604 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:36:58,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58 WrapperNode [2023-08-24 12:36:58,605 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:36:58,606 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:36:58,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:36:58,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:36:58,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,633 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,653 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2023-08-24 12:36:58,654 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:36:58,655 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:36:58,655 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:36:58,655 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:36:58,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,674 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,678 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,682 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,683 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:36:58,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:36:58,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:36:58,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:36:58,693 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (1/1) ... [2023-08-24 12:36:58,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:36:58,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:36:58,716 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 12:36:58,734 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 12:36:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:36:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:36:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:36:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:36:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:36:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:36:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 12:36:58,744 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 12:36:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:36:58,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:36:58,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:36:58,745 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 12:36:58,834 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:36:58,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:36:58,976 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:36:58,980 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:36:58,981 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-24 12:36:58,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:36:58 BoogieIcfgContainer [2023-08-24 12:36:58,982 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:36:58,984 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:36:58,984 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:36:58,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:36:58,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:36:58" (1/3) ... [2023-08-24 12:36:58,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f60196c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:36:58, skipping insertion in model container [2023-08-24 12:36:58,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:58" (2/3) ... [2023-08-24 12:36:58,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f60196c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:36:58, skipping insertion in model container [2023-08-24 12:36:58,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:36:58" (3/3) ... [2023-08-24 12:36:58,991 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2023-08-24 12:36:59,001 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:36:59,001 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 12:36:59,002 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:36:59,046 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 12:36:59,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 123 transitions, 254 flow [2023-08-24 12:36:59,108 INFO L124 PetriNetUnfolderBase]: 23/167 cut-off events. [2023-08-24 12:36:59,108 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:36:59,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 23/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 370 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-24 12:36:59,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 123 transitions, 254 flow [2023-08-24 12:36:59,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:59,118 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:36:59,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:59,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:59,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:59,148 INFO L124 PetriNetUnfolderBase]: 22/162 cut-off events. [2023-08-24 12:36:59,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:36:59,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 162 events. 22/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 358 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-24 12:36:59,150 INFO L119 LiptonReduction]: Number of co-enabled transitions 2800 [2023-08-24 12:37:01,735 INFO L134 LiptonReduction]: Checked pairs total: 4793 [2023-08-24 12:37:01,735 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-24 12:37:01,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:01,747 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:01,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:01,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:01,750 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-24 12:37:01,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:01,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:01,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:37:01,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:01,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash 14648327, now seen corresponding path program 1 times [2023-08-24 12:37:01,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:01,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277105565] [2023-08-24 12:37:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:01,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:01,907 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 12:37:01,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:01,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277105565] [2023-08-24 12:37:01,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277105565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:01,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:01,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:01,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102073485] [2023-08-24 12:37:01,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:01,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:01,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:01,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:01,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 229 [2023-08-24 12:37:01,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 12:37:01,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:01,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 229 [2023-08-24 12:37:01,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:02,012 INFO L124 PetriNetUnfolderBase]: 97/217 cut-off events. [2023-08-24 12:37:02,012 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:02,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 217 events. 97/217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 943 event pairs, 0 based on Foata normal form. 12/193 useless extension candidates. Maximal degree in co-relation 409. Up to 197 conditions per place. [2023-08-24 12:37:02,016 INFO L140 encePairwiseOnDemand]: 217/229 looper letters, 21 selfloop transitions, 2 changer transitions 9/33 dead transitions. [2023-08-24 12:37:02,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 133 flow [2023-08-24 12:37:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-08-24 12:37:02,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094614264919942 [2023-08-24 12:37:02,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-08-24 12:37:02,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-08-24 12:37:02,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:02,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-08-24 12:37:02,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 12:37:02,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 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 12:37:02,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 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 12:37:02,044 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 350 transitions. [2023-08-24 12:37:02,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 133 flow [2023-08-24 12:37:02,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:02,048 INFO L231 Difference]: Finished difference. Result has 29 places, 16 transitions, 43 flow [2023-08-24 12:37:02,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2023-08-24 12:37:02,052 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-24 12:37:02,052 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 43 flow [2023-08-24 12:37:02,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 12:37:02,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:02,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:02,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:37:02,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:02,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1554425363, now seen corresponding path program 1 times [2023-08-24 12:37:02,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:02,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273195866] [2023-08-24 12:37:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:02,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:02,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:02,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273195866] [2023-08-24 12:37:02,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273195866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:02,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090689877] [2023-08-24 12:37:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:02,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:02,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:02,130 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 12:37:02,131 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 12:37:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:02,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:37:02,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:02,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:02,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090689877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:02,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:02,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:37:02,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210565445] [2023-08-24 12:37:02,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:02,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:37:02,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:02,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:37:02,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:37:02,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 229 [2023-08-24 12:37:02,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 43 flow. Second operand has 7 states, 7 states have (on average 103.28571428571429) internal successors, (723), 7 states have internal predecessors, (723), 0 states have call successors, (0), 0 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 12:37:02,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:02,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 229 [2023-08-24 12:37:02,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:02,281 INFO L124 PetriNetUnfolderBase]: 16/46 cut-off events. [2023-08-24 12:37:02,281 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-24 12:37:02,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 46 events. 16/46 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 7 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-08-24 12:37:02,282 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-24 12:37:02,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 95 flow [2023-08-24 12:37:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:37:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:37:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2023-08-24 12:37:02,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650655021834061 [2023-08-24 12:37:02,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2023-08-24 12:37:02,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2023-08-24 12:37:02,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:02,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2023-08-24 12:37:02,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 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 12:37:02,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 12:37:02,286 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 12:37:02,286 INFO L175 Difference]: Start difference. First operand has 29 places, 16 transitions, 43 flow. Second operand 4 states and 426 transitions. [2023-08-24 12:37:02,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 95 flow [2023-08-24 12:37:02,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 12:37:02,287 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-24 12:37:02,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-24 12:37:02,288 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-08-24 12:37:02,288 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-24 12:37:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 103.28571428571429) internal successors, (723), 7 states have internal predecessors, (723), 0 states have call successors, (0), 0 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 12:37:02,290 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:37:02,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 12:37:02,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:02,496 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:37:02,498 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:37:02,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 123 transitions, 254 flow [2023-08-24 12:37:02,509 INFO L124 PetriNetUnfolderBase]: 23/167 cut-off events. [2023-08-24 12:37:02,509 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:37:02,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 23/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 370 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-24 12:37:02,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 123 transitions, 254 flow [2023-08-24 12:37:02,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 118 transitions, 241 flow [2023-08-24 12:37:02,510 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:02,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 118 transitions, 241 flow [2023-08-24 12:37:02,510 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 118 transitions, 241 flow [2023-08-24 12:37:02,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 118 transitions, 241 flow [2023-08-24 12:37:02,517 INFO L124 PetriNetUnfolderBase]: 22/162 cut-off events. [2023-08-24 12:37:02,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:02,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 162 events. 22/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 358 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-24 12:37:02,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 2800 [2023-08-24 12:37:04,821 INFO L134 LiptonReduction]: Checked pairs total: 4433 [2023-08-24 12:37:04,821 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-24 12:37:04,823 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:37:04,823 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:04,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:04,826 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:04,826 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-08-24 12:37:04,826 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:04,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:04,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:37:04,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:37:04,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:04,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1913463, now seen corresponding path program 1 times [2023-08-24 12:37:04,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:04,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227577174] [2023-08-24 12:37:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:04,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:04,853 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:37:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:04,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:37:04,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:37:04,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:37:04,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 12:37:04,893 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:37:04,893 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:37:04,893 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:37:04,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:37:04,909 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 12:37:04,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:04,945 INFO L124 PetriNetUnfolderBase]: 40/266 cut-off events. [2023-08-24 12:37:04,945 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:37:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 40/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 739 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-24 12:37:04,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:04,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:04,947 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:04,947 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:04,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:04,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:04,964 INFO L124 PetriNetUnfolderBase]: 40/266 cut-off events. [2023-08-24 12:37:04,964 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:37:04,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 40/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 739 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-24 12:37:04,968 INFO L119 LiptonReduction]: Number of co-enabled transitions 7784 [2023-08-24 12:37:07,345 INFO L134 LiptonReduction]: Checked pairs total: 17490 [2023-08-24 12:37:07,345 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-24 12:37:07,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:07,347 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:07,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:07,348 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:07,348 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-24 12:37:07,349 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:07,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:37:07,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:07,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:07,349 INFO L85 PathProgramCache]: Analyzing trace with hash 27236629, now seen corresponding path program 1 times [2023-08-24 12:37:07,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:07,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741641731] [2023-08-24 12:37:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:07,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:07,389 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 12:37:07,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:07,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741641731] [2023-08-24 12:37:07,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741641731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:07,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:07,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:07,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974315668] [2023-08-24 12:37:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:07,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-24 12:37:07,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 12:37:07,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:07,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-24 12:37:07,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:07,573 INFO L124 PetriNetUnfolderBase]: 1446/2604 cut-off events. [2023-08-24 12:37:07,574 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-24 12:37:07,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4992 conditions, 2604 events. 1446/2604 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15544 event pairs, 1124 based on Foata normal form. 289/2567 useless extension candidates. Maximal degree in co-relation 2561. Up to 2327 conditions per place. [2023-08-24 12:37:07,581 INFO L140 encePairwiseOnDemand]: 255/273 looper letters, 28 selfloop transitions, 2 changer transitions 12/51 dead transitions. [2023-08-24 12:37:07,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 200 flow [2023-08-24 12:37:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-24 12:37:07,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5262515262515263 [2023-08-24 12:37:07,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-24 12:37:07,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-24 12:37:07,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:07,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-24 12:37:07,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 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 12:37:07,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:07,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:37:07,585 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 431 transitions. [2023-08-24 12:37:07,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 200 flow [2023-08-24 12:37:07,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:07,588 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 82 flow [2023-08-24 12:37:07,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-24 12:37:07,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-24 12:37:07,592 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 82 flow [2023-08-24 12:37:07,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 12:37:07,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:07,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:07,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:37:07,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:07,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1854168215, now seen corresponding path program 1 times [2023-08-24 12:37:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:07,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665674045] [2023-08-24 12:37:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:07,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665674045] [2023-08-24 12:37:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665674045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177425016] [2023-08-24 12:37:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:07,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:07,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:07,653 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 12:37:07,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 12:37:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:07,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:37:07,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:07,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:07,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177425016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:07,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:07,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:37:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591614236] [2023-08-24 12:37:07,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:07,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:37:07,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:37:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:37:07,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-24 12:37:07,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 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 12:37:07,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:07,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-24 12:37:07,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:07,812 INFO L124 PetriNetUnfolderBase]: 286/546 cut-off events. [2023-08-24 12:37:07,812 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-08-24 12:37:07,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 546 events. 286/546 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2552 event pairs, 49 based on Foata normal form. 70/615 useless extension candidates. Maximal degree in co-relation 166. Up to 346 conditions per place. [2023-08-24 12:37:07,813 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 0 selfloop transitions, 0 changer transitions 51/51 dead transitions. [2023-08-24 12:37:07,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 202 flow [2023-08-24 12:37:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:37:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:37:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 659 transitions. [2023-08-24 12:37:07,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827838827838828 [2023-08-24 12:37:07,814 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 659 transitions. [2023-08-24 12:37:07,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 659 transitions. [2023-08-24 12:37:07,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:07,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 659 transitions. [2023-08-24 12:37:07,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 0 states have call successors, (0), 0 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 12:37:07,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 12:37:07,818 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 12:37:07,818 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 82 flow. Second operand 5 states and 659 transitions. [2023-08-24 12:37:07,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 202 flow [2023-08-24 12:37:07,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:37:07,819 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-24 12:37:07,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-24 12:37:07,819 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -6 predicate places. [2023-08-24 12:37:07,819 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-24 12:37:07,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 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 12:37:07,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:37:07,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 12:37:08,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:08,024 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:37:08,025 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:37:08,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:08,037 INFO L124 PetriNetUnfolderBase]: 40/266 cut-off events. [2023-08-24 12:37:08,038 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:37:08,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 40/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 739 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-24 12:37:08,038 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:08,039 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:08,039 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:08,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:08,039 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:08,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:08,050 INFO L124 PetriNetUnfolderBase]: 40/266 cut-off events. [2023-08-24 12:37:08,051 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:37:08,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 40/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 739 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-24 12:37:08,054 INFO L119 LiptonReduction]: Number of co-enabled transitions 7784 [2023-08-24 12:37:10,378 INFO L134 LiptonReduction]: Checked pairs total: 17474 [2023-08-24 12:37:10,378 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-24 12:37:10,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:37:10,380 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:10,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:10,383 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:10,383 INFO L124 PetriNetUnfolderBase]: 15/62 cut-off events. [2023-08-24 12:37:10,383 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 12:37:10,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:10,383 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 12:37:10,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:37:10,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash 287437234, now seen corresponding path program 1 times [2023-08-24 12:37:10,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:10,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775225217] [2023-08-24 12:37:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:10,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:10,408 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:37:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:10,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:37:10,427 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:37:10,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:37:10,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:37:10,428 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:37:10,429 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:37:10,429 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:37:10,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 12:37:10,445 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 12:37:10,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:10,469 INFO L124 PetriNetUnfolderBase]: 62/398 cut-off events. [2023-08-24 12:37:10,469 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:37:10,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 398 events. 62/398 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1273 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-24 12:37:10,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:10,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:10,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:10,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:10,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:10,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:10,493 INFO L124 PetriNetUnfolderBase]: 62/398 cut-off events. [2023-08-24 12:37:10,493 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:37:10,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 398 events. 62/398 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1273 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-24 12:37:10,502 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-24 12:37:12,931 INFO L134 LiptonReduction]: Checked pairs total: 38263 [2023-08-24 12:37:12,932 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-24 12:37:12,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:12,933 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:12,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:12,934 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:12,934 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-24 12:37:12,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:12,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:12,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:37:12,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:12,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:12,935 INFO L85 PathProgramCache]: Analyzing trace with hash 41644316, now seen corresponding path program 1 times [2023-08-24 12:37:12,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:12,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449107754] [2023-08-24 12:37:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:12,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:12,962 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 12:37:12,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:12,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449107754] [2023-08-24 12:37:12,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449107754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:12,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:12,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616545163] [2023-08-24 12:37:12,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:12,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 318 [2023-08-24 12:37:12,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 12:37:12,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:12,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 318 [2023-08-24 12:37:12,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:14,455 INFO L124 PetriNetUnfolderBase]: 16282/24958 cut-off events. [2023-08-24 12:37:14,455 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2023-08-24 12:37:14,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48518 conditions, 24958 events. 16282/24958 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 179986 event pairs, 13853 based on Foata normal form. 5644/27919 useless extension candidates. Maximal degree in co-relation 9279. Up to 22994 conditions per place. [2023-08-24 12:37:14,534 INFO L140 encePairwiseOnDemand]: 294/318 looper letters, 35 selfloop transitions, 2 changer transitions 13/64 dead transitions. [2023-08-24 12:37:14,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 254 flow [2023-08-24 12:37:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-24 12:37:14,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356394129979035 [2023-08-24 12:37:14,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-24 12:37:14,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-24 12:37:14,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:14,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-24 12:37:14,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 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 12:37:14,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 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 12:37:14,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 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 12:37:14,539 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 511 transitions. [2023-08-24 12:37:14,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 254 flow [2023-08-24 12:37:14,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:14,543 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 113 flow [2023-08-24 12:37:14,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-24 12:37:14,544 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-24 12:37:14,545 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 113 flow [2023-08-24 12:37:14,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 12:37:14,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:14,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:14,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 12:37:14,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:14,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:14,545 INFO L85 PathProgramCache]: Analyzing trace with hash 173992110, now seen corresponding path program 1 times [2023-08-24 12:37:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:14,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892061512] [2023-08-24 12:37:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:14,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:14,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892061512] [2023-08-24 12:37:14,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892061512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815687251] [2023-08-24 12:37:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:14,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:14,584 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 12:37:14,586 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 12:37:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:14,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:37:14,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:14,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:14,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815687251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:14,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:14,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:37:14,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617181581] [2023-08-24 12:37:14,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:14,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:37:14,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:37:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:37:14,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 318 [2023-08-24 12:37:14,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 12:37:14,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:14,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 318 [2023-08-24 12:37:14,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:15,000 INFO L124 PetriNetUnfolderBase]: 3352/5103 cut-off events. [2023-08-24 12:37:15,000 INFO L125 PetriNetUnfolderBase]: For 882/882 co-relation queries the response was YES. [2023-08-24 12:37:15,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10791 conditions, 5103 events. 3352/5103 cut-off events. For 882/882 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 29945 event pairs, 392 based on Foata normal form. 511/5586 useless extension candidates. Maximal degree in co-relation 1597. Up to 3178 conditions per place. [2023-08-24 12:37:15,009 INFO L140 encePairwiseOnDemand]: 315/318 looper letters, 0 selfloop transitions, 0 changer transitions 85/85 dead transitions. [2023-08-24 12:37:15,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 337 flow [2023-08-24 12:37:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:37:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:37:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 944 transitions. [2023-08-24 12:37:15,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947589098532495 [2023-08-24 12:37:15,011 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 944 transitions. [2023-08-24 12:37:15,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 944 transitions. [2023-08-24 12:37:15,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:15,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 944 transitions. [2023-08-24 12:37:15,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.33333333333334) internal successors, (944), 6 states have internal predecessors, (944), 0 states have call successors, (0), 0 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 12:37:15,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 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 12:37:15,015 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 0 states have call successors, (0), 0 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 12:37:15,016 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 113 flow. Second operand 6 states and 944 transitions. [2023-08-24 12:37:15,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 337 flow [2023-08-24 12:37:15,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 85 transitions, 333 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 12:37:15,018 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-24 12:37:15,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-24 12:37:15,020 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-08-24 12:37:15,020 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-24 12:37:15,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 0 states have call successors, (0), 0 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 12:37:15,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:37:15,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 12:37:15,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:15,224 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:37:15,225 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:37:15,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:15,248 INFO L124 PetriNetUnfolderBase]: 62/398 cut-off events. [2023-08-24 12:37:15,248 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:37:15,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 398 events. 62/398 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1273 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-24 12:37:15,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:15,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:15,253 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:15,253 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:15,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:15,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:15,277 INFO L124 PetriNetUnfolderBase]: 62/398 cut-off events. [2023-08-24 12:37:15,277 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:37:15,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 398 events. 62/398 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1273 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-24 12:37:15,286 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-24 12:37:17,601 INFO L134 LiptonReduction]: Checked pairs total: 35317 [2023-08-24 12:37:17,601 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-24 12:37:17,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:37:17,603 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:17,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:17,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:17,609 INFO L124 PetriNetUnfolderBase]: 26/103 cut-off events. [2023-08-24 12:37:17,609 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 12:37:17,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:17,609 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 12:37:17,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:37:17,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:17,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1024241280, now seen corresponding path program 1 times [2023-08-24 12:37:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099194327] [2023-08-24 12:37:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:17,620 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:37:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:17,642 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:37:17,642 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:37:17,642 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:37:17,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 12:37:17,642 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:37:17,642 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:37:17,642 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:37:17,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 12:37:17,658 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:37:17,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:17,700 INFO L124 PetriNetUnfolderBase]: 96/598 cut-off events. [2023-08-24 12:37:17,700 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:37:17,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 598 events. 96/598 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2202 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 418. Up to 32 conditions per place. [2023-08-24 12:37:17,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:17,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:17,707 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:17,707 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:17,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:17,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:17,752 INFO L124 PetriNetUnfolderBase]: 96/598 cut-off events. [2023-08-24 12:37:17,753 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:37:17,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 598 events. 96/598 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2202 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 418. Up to 32 conditions per place. [2023-08-24 12:37:17,762 INFO L119 LiptonReduction]: Number of co-enabled transitions 22512 [2023-08-24 12:37:20,203 INFO L134 LiptonReduction]: Checked pairs total: 59532 [2023-08-24 12:37:20,203 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-24 12:37:20,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:20,204 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:20,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:20,206 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:20,206 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-24 12:37:20,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:20,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:20,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:37:20,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:20,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:20,206 INFO L85 PathProgramCache]: Analyzing trace with hash 57713040, now seen corresponding path program 1 times [2023-08-24 12:37:20,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:20,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242611117] [2023-08-24 12:37:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:20,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:20,223 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 12:37:20,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242611117] [2023-08-24 12:37:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242611117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:20,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:20,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:20,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512028985] [2023-08-24 12:37:20,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:20,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:20,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:20,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-24 12:37:20,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 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 12:37:20,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:20,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-24 12:37:20,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:44,671 INFO L124 PetriNetUnfolderBase]: 321014/444511 cut-off events. [2023-08-24 12:37:44,671 INFO L125 PetriNetUnfolderBase]: For 14614/14614 co-relation queries the response was YES. [2023-08-24 12:37:45,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869590 conditions, 444511 events. 321014/444511 cut-off events. For 14614/14614 co-relation queries the response was YES. Maximal size of possible extension queue 9874. Compared 3516530 event pairs, 303176 based on Foata normal form. 78598/483385 useless extension candidates. Maximal degree in co-relation 75977. Up to 416874 conditions per place. [2023-08-24 12:37:46,288 INFO L140 encePairwiseOnDemand]: 329/360 looper letters, 49 selfloop transitions, 2 changer transitions 15/80 dead transitions. [2023-08-24 12:37:46,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 332 flow [2023-08-24 12:37:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-08-24 12:37:46,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-24 12:37:46,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-08-24 12:37:46,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-08-24 12:37:46,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:46,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-08-24 12:37:46,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 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 12:37:46,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 12:37:46,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 12:37:46,293 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 238 flow. Second operand 3 states and 600 transitions. [2023-08-24 12:37:46,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 332 flow [2023-08-24 12:37:46,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:46,302 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 146 flow [2023-08-24 12:37:46,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2023-08-24 12:37:46,302 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-24 12:37:46,302 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 146 flow [2023-08-24 12:37:46,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 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 12:37:46,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:46,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:46,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 12:37:46,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:46,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:46,303 INFO L85 PathProgramCache]: Analyzing trace with hash 926498948, now seen corresponding path program 1 times [2023-08-24 12:37:46,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:46,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388025503] [2023-08-24 12:37:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:46,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388025503] [2023-08-24 12:37:46,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388025503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182525753] [2023-08-24 12:37:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:46,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:46,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:46,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:37:46,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 12:37:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:46,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:37:46,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:46,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:46,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182525753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:46,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:46,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:37:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977911012] [2023-08-24 12:37:46,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:46,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:37:46,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:37:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:37:46,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-24 12:37:46,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 169.28571428571428) internal successors, (1185), 7 states have internal predecessors, (1185), 0 states have call successors, (0), 0 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 12:37:46,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:46,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-24 12:37:46,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:54,587 INFO L124 PetriNetUnfolderBase]: 123712/165100 cut-off events. [2023-08-24 12:37:54,587 INFO L125 PetriNetUnfolderBase]: For 11493/11493 co-relation queries the response was YES. [2023-08-24 12:37:54,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342033 conditions, 165100 events. 123712/165100 cut-off events. For 11493/11493 co-relation queries the response was YES. Maximal size of possible extension queue 4106. Compared 1132844 event pairs, 8829 based on Foata normal form. 738/165810 useless extension candidates. Maximal degree in co-relation 38916. Up to 105949 conditions per place. [2023-08-24 12:37:55,487 INFO L140 encePairwiseOnDemand]: 356/360 looper letters, 120 selfloop transitions, 5 changer transitions 1/140 dead transitions. [2023-08-24 12:37:55,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 140 transitions, 570 flow [2023-08-24 12:37:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:37:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:37:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1131 transitions. [2023-08-24 12:37:55,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236111111111111 [2023-08-24 12:37:55,490 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1131 transitions. [2023-08-24 12:37:55,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1131 transitions. [2023-08-24 12:37:55,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:55,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1131 transitions. [2023-08-24 12:37:55,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.5) internal successors, (1131), 6 states have internal predecessors, (1131), 0 states have call successors, (0), 0 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 12:37:55,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 12:37:55,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 12:37:55,494 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 146 flow. Second operand 6 states and 1131 transitions. [2023-08-24 12:37:55,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 140 transitions, 570 flow [2023-08-24 12:37:55,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 140 transitions, 562 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 12:37:55,500 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-08-24 12:37:55,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-08-24 12:37:55,500 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-08-24 12:37:55,500 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-08-24 12:37:55,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.28571428571428) internal successors, (1185), 7 states have internal predecessors, (1185), 0 states have call successors, (0), 0 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 12:37:55,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:55,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:55,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 12:37:55,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:55,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:55,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:55,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1253226266, now seen corresponding path program 1 times [2023-08-24 12:37:55,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:55,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282647211] [2023-08-24 12:37:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:55,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-24 12:37:55,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:55,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282647211] [2023-08-24 12:37:55,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282647211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:55,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:55,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:37:55,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059608845] [2023-08-24 12:37:55,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:55,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:55,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:55,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 360 [2023-08-24 12:37:55,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 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 12:37:55,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:55,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 360 [2023-08-24 12:37:55,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:38:08,715 INFO L124 PetriNetUnfolderBase]: 193460/251438 cut-off events. [2023-08-24 12:38:08,715 INFO L125 PetriNetUnfolderBase]: For 184848/184848 co-relation queries the response was YES. [2023-08-24 12:38:09,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586334 conditions, 251438 events. 193460/251438 cut-off events. For 184848/184848 co-relation queries the response was YES. Maximal size of possible extension queue 5280. Compared 1605713 event pairs, 97454 based on Foata normal form. 144/251552 useless extension candidates. Maximal degree in co-relation 453665. Up to 248558 conditions per place. [2023-08-24 12:38:10,173 INFO L140 encePairwiseOnDemand]: 354/360 looper letters, 69 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2023-08-24 12:38:10,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 82 transitions, 416 flow [2023-08-24 12:38:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:38:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:38:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-24 12:38:10,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-24 12:38:10,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-24 12:38:10,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-24 12:38:10,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:38:10,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-24 12:38:10,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 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 12:38:10,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 12:38:10,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 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 12:38:10,177 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 3 states and 540 transitions. [2023-08-24 12:38:10,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 82 transitions, 416 flow [2023-08-24 12:38:10,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 396 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-24 12:38:10,196 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 194 flow [2023-08-24 12:38:10,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-08-24 12:38:10,197 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-08-24 12:38:10,197 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 194 flow [2023-08-24 12:38:10,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 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 12:38:10,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:38:10,197 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:38:10,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 12:38:10,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:38:10,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:38:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash 59075873, now seen corresponding path program 1 times [2023-08-24 12:38:10,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:38:10,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259295651] [2023-08-24 12:38:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:10,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:38:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:38:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:10,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:38:10,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259295651] [2023-08-24 12:38:10,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259295651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:38:10,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337521046] [2023-08-24 12:38:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:10,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:38:10,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:38:10,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:38:10,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 12:38:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:38:10,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 12:38:10,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:38:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:10,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:38:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337521046] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:38:10,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:38:10,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 12:38:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074716331] [2023-08-24 12:38:10,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:38:10,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 12:38:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:38:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 12:38:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 12:38:10,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-24 12:38:10,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 194 flow. Second operand has 13 states, 13 states have (on average 170.0) internal successors, (2210), 13 states have internal predecessors, (2210), 0 states have call successors, (0), 0 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 12:38:10,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:38:10,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-24 12:38:10,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:38:13,583 INFO L124 PetriNetUnfolderBase]: 41092/57838 cut-off events. [2023-08-24 12:38:13,584 INFO L125 PetriNetUnfolderBase]: For 43272/43278 co-relation queries the response was YES. [2023-08-24 12:38:13,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129483 conditions, 57838 events. 41092/57838 cut-off events. For 43272/43278 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 389604 event pairs, 552 based on Foata normal form. 5832/63654 useless extension candidates. Maximal degree in co-relation 84026. Up to 26487 conditions per place. [2023-08-24 12:38:13,736 INFO L140 encePairwiseOnDemand]: 357/360 looper letters, 0 selfloop transitions, 0 changer transitions 149/149 dead transitions. [2023-08-24 12:38:13,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 149 transitions, 682 flow [2023-08-24 12:38:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:38:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:38:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1292 transitions. [2023-08-24 12:38:13,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126984126984127 [2023-08-24 12:38:13,739 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1292 transitions. [2023-08-24 12:38:13,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1292 transitions. [2023-08-24 12:38:13,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:38:13,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1292 transitions. [2023-08-24 12:38:13,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 states have internal predecessors, (1292), 0 states have call successors, (0), 0 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 12:38:13,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 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 12:38:13,744 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 0 states have call successors, (0), 0 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 12:38:13,744 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 194 flow. Second operand 7 states and 1292 transitions. [2023-08-24 12:38:13,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 149 transitions, 682 flow [2023-08-24 12:38:13,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 149 transitions, 659 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-24 12:38:13,751 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-24 12:38:13,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-24 12:38:13,751 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-08-24 12:38:13,751 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-24 12:38:13,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.0) internal successors, (2210), 13 states have internal predecessors, (2210), 0 states have call successors, (0), 0 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 12:38:13,752 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:38:13,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 12:38:13,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 12:38:13,956 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 12:38:13,956 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:38:13,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:13,992 INFO L124 PetriNetUnfolderBase]: 96/598 cut-off events. [2023-08-24 12:38:13,992 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:38:13,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 598 events. 96/598 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2202 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 418. Up to 32 conditions per place. [2023-08-24 12:38:13,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:13,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:13,996 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:38:13,997 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:13,997 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:13,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:14,031 INFO L124 PetriNetUnfolderBase]: 96/598 cut-off events. [2023-08-24 12:38:14,031 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:38:14,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 598 events. 96/598 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2202 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 418. Up to 32 conditions per place. [2023-08-24 12:38:14,041 INFO L119 LiptonReduction]: Number of co-enabled transitions 22512 [2023-08-24 12:38:16,649 INFO L134 LiptonReduction]: Checked pairs total: 66098 [2023-08-24 12:38:16,650 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-24 12:38:16,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:38:16,651 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:38:16,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:38:16,657 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:38:16,657 INFO L124 PetriNetUnfolderBase]: 40/151 cut-off events. [2023-08-24 12:38:16,657 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 12:38:16,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:38:16,657 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 12:38:16,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:38:16,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:38:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash 771928196, now seen corresponding path program 1 times [2023-08-24 12:38:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:38:16,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540167981] [2023-08-24 12:38:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:38:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:38:16,667 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:38:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:38:16,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:38:16,677 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:38:16,677 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:38:16,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 12:38:16,677 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:38:16,678 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:38:16,678 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:38:16,678 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 12:38:16,691 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 12:38:16,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:16,909 INFO L124 PetriNetUnfolderBase]: 158/938 cut-off events. [2023-08-24 12:38:16,910 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:38:16,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 938 events. 158/938 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4103 event pairs, 23 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 643. Up to 80 conditions per place. [2023-08-24 12:38:16,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:16,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:16,920 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:38:16,920 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:16,921 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:16,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:16,990 INFO L124 PetriNetUnfolderBase]: 158/938 cut-off events. [2023-08-24 12:38:16,990 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:38:16,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 938 events. 158/938 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4103 event pairs, 23 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 643. Up to 80 conditions per place. [2023-08-24 12:38:17,009 INFO L119 LiptonReduction]: Number of co-enabled transitions 32480 [2023-08-24 12:38:19,462 INFO L134 LiptonReduction]: Checked pairs total: 90937 [2023-08-24 12:38:19,462 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-24 12:38:19,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:38:19,463 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;@189280be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:38:19,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:38:19,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:38:19,465 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-24 12:38:19,465 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:38:19,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:38:19,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:38:19,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:38:19,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:38:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 75630383, now seen corresponding path program 1 times [2023-08-24 12:38:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:38:19,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664510445] [2023-08-24 12:38:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:38:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:38:19,482 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 12:38:19,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:38:19,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664510445] [2023-08-24 12:38:19,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664510445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:38:19,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:38:19,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:38:19,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118127229] [2023-08-24 12:38:19,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:38:19,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:38:19,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:38:19,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:38:19,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:38:19,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 405 [2023-08-24 12:38:19,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 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 12:38:19,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:38:19,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 405 [2023-08-24 12:38:19,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand