/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:51:57,039 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:51:57,117 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 [2023-08-26 20:51:57,121 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:51:57,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:51:57,148 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:51:57,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:51:57,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:51:57,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:51:57,153 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:51:57,153 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:51:57,154 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:51:57,154 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:51:57,154 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:51:57,155 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:51:57,155 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:51:57,155 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:51:57,155 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:51:57,156 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:51:57,156 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:51:57,156 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:51:57,156 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:51:57,157 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:51:57,157 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:51:57,157 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:51:57,157 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:51:57,157 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:51:57,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:51:57,158 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:51:57,158 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:51:57,158 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:51:57,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:51:57,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:51:57,159 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:51:57,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:51:57,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 20:51:57,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:51:57,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:51:57,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:51:57,502 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:51:57,502 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:51:57,504 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-26 20:51:58,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:51:59,008 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:51:59,009 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-26 20:51:59,023 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/478bd6da5/f98a56a40d754ddf91e97e8883323b18/FLAGb8e7d7c6e [2023-08-26 20:51:59,035 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/478bd6da5/f98a56a40d754ddf91e97e8883323b18 [2023-08-26 20:51:59,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:51:59,042 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:51:59,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:51:59,046 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:51:59,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:51:59,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,051 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660a36cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59, skipping insertion in model container [2023-08-26 20:51:59,051 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,104 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:51:59,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:51:59,436 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:51:59,463 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 20:51:59,464 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 20:51:59,471 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [689] [2023-08-26 20:51:59,474 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [700] [2023-08-26 20:51:59,475 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [701] [2023-08-26 20:51:59,475 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: inline unsigned [702] [2023-08-26 20:51:59,475 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [703] [2023-08-26 20:51:59,479 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: inline unsigned [716] [2023-08-26 20:51:59,480 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [717] [2023-08-26 20:51:59,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:51:59,527 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:51:59,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59 WrapperNode [2023-08-26 20:51:59,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:51:59,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:51:59,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:51:59,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:51:59,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,561 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,597 INFO L138 Inliner]: procedures = 172, calls = 26, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 140 [2023-08-26 20:51:59,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:51:59,599 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:51:59,599 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:51:59,599 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:51:59,606 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,636 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:51:59,644 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:51:59,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:51:59,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:51:59,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (1/1) ... [2023-08-26 20:51:59,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:51:59,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:51:59,681 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) [2023-08-26 20:51:59,694 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 [2023-08-26 20:51:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 20:51:59,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 20:51:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:51:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:51:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:51:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:51:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:51:59,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:51:59,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:51:59,731 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 20:51:59,874 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:51:59,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:52:00,076 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:52:00,200 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:52:00,200 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 20:52:00,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:52:00 BoogieIcfgContainer [2023-08-26 20:52:00,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:52:00,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:52:00,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:52:00,207 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:52:00,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:51:59" (1/3) ... [2023-08-26 20:52:00,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231266f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:52:00, skipping insertion in model container [2023-08-26 20:52:00,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:51:59" (2/3) ... [2023-08-26 20:52:00,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231266f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:52:00, skipping insertion in model container [2023-08-26 20:52:00,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:52:00" (3/3) ... [2023-08-26 20:52:00,209 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-08-26 20:52:00,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:52:00,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-26 20:52:00,249 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:52:00,291 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:52:00,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 89 transitions, 183 flow [2023-08-26 20:52:00,373 INFO L124 PetriNetUnfolderBase]: 9/99 cut-off events. [2023-08-26 20:52:00,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:52:00,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 9/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-26 20:52:00,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 89 transitions, 183 flow [2023-08-26 20:52:00,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 89 transitions, 183 flow [2023-08-26 20:52:00,385 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:52:00,399 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 89 transitions, 183 flow [2023-08-26 20:52:00,401 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 89 transitions, 183 flow [2023-08-26 20:52:00,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 89 transitions, 183 flow [2023-08-26 20:52:00,419 INFO L124 PetriNetUnfolderBase]: 9/99 cut-off events. [2023-08-26 20:52:00,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:52:00,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 9/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 177 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-26 20:52:00,422 INFO L119 LiptonReduction]: Number of co-enabled transitions 1586 [2023-08-26 20:52:05,425 INFO L134 LiptonReduction]: Checked pairs total: 1644 [2023-08-26 20:52:05,426 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-26 20:52:05,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:52:05,443 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;@42308949, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:52:05,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 20:52:05,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:52:05,445 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-26 20:52:05,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:52:05,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:05,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 20:52:05,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-26 20:52:05,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash 18695041, now seen corresponding path program 1 times [2023-08-26 20:52:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:05,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888453529] [2023-08-26 20:52:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:05,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:52:05,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:52:05,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888453529] [2023-08-26 20:52:05,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888453529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:52:05,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:52:05,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:52:05,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668101750] [2023-08-26 20:52:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:52:05,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:52:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:52:05,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:52:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:52:05,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 216 [2023-08-26 20:52:05,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 9 transitions, 23 flow. Second operand has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:05,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:52:05,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 216 [2023-08-26 20:52:05,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:52:05,705 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-26 20:52:05,705 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:52:05,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-26 20:52:05,706 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-26 20:52:05,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-26 20:52:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:52:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:52:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 148 transitions. [2023-08-26 20:52:05,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3425925925925926 [2023-08-26 20:52:05,718 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 148 transitions. [2023-08-26 20:52:05,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 148 transitions. [2023-08-26 20:52:05,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:52:05,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 148 transitions. [2023-08-26 20:52:05,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:05,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:05,727 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:05,729 INFO L175 Difference]: Start difference. First operand has 12 places, 9 transitions, 23 flow. Second operand 2 states and 148 transitions. [2023-08-26 20:52:05,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-26 20:52:05,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:52:05,732 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-26 20:52:05,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-26 20:52:05,736 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -2 predicate places. [2023-08-26 20:52:05,736 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-26 20:52:05,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:05,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:05,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 20:52:05,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:52:05,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-26 20:52:05,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash 785988836, now seen corresponding path program 1 times [2023-08-26 20:52:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774037047] [2023-08-26 20:52:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:05,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:52:05,756 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:52:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:52:05,780 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:52:05,780 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:52:05,782 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-26 20:52:05,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2023-08-26 20:52:05,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2023-08-26 20:52:05,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2023-08-26 20:52:05,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2023-08-26 20:52:05,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:52:05,784 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 20:52:05,786 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:52:05,786 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 20:52:05,812 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:52:05,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 151 transitions, 314 flow [2023-08-26 20:52:05,840 INFO L124 PetriNetUnfolderBase]: 17/173 cut-off events. [2023-08-26 20:52:05,841 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:52:05,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 173 events. 17/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 533 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-08-26 20:52:05,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 151 transitions, 314 flow [2023-08-26 20:52:05,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 151 transitions, 314 flow [2023-08-26 20:52:05,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:52:05,845 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 151 transitions, 314 flow [2023-08-26 20:52:05,845 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 151 transitions, 314 flow [2023-08-26 20:52:05,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 151 transitions, 314 flow [2023-08-26 20:52:05,869 INFO L124 PetriNetUnfolderBase]: 17/173 cut-off events. [2023-08-26 20:52:05,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:52:05,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 173 events. 17/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 533 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-08-26 20:52:05,876 INFO L119 LiptonReduction]: Number of co-enabled transitions 10736 [2023-08-26 20:52:08,763 INFO L134 LiptonReduction]: Checked pairs total: 38365 [2023-08-26 20:52:08,763 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-26 20:52:08,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:52:08,766 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;@42308949, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:52:08,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 20:52:08,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:52:08,771 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2023-08-26 20:52:08,771 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:52:08,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:08,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:52:08,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 20:52:08,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash 587058462, now seen corresponding path program 1 times [2023-08-26 20:52:08,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:08,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267034029] [2023-08-26 20:52:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:08,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:52:09,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:52:09,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267034029] [2023-08-26 20:52:09,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267034029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:52:09,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:52:09,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:52:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090377895] [2023-08-26 20:52:09,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:52:09,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:52:09,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:52:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:52:09,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:52:09,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 293 [2023-08-26 20:52:09,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 70 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:09,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:52:09,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 293 [2023-08-26 20:52:09,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:52:09,407 INFO L124 PetriNetUnfolderBase]: 995/1773 cut-off events. [2023-08-26 20:52:09,407 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-26 20:52:09,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3540 conditions, 1773 events. 995/1773 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11206 event pairs, 289 based on Foata normal form. 64/1533 useless extension candidates. Maximal degree in co-relation 2524. Up to 584 conditions per place. [2023-08-26 20:52:09,418 INFO L140 encePairwiseOnDemand]: 273/293 looper letters, 87 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2023-08-26 20:52:09,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 104 transitions, 424 flow [2023-08-26 20:52:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:52:09,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:52:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 645 transitions. [2023-08-26 20:52:09,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36689419795221845 [2023-08-26 20:52:09,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 645 transitions. [2023-08-26 20:52:09,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 645 transitions. [2023-08-26 20:52:09,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:52:09,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 645 transitions. [2023-08-26 20:52:09,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.5) internal successors, (645), 6 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:09,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:09,431 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 293.0) internal successors, (2051), 7 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:09,431 INFO L175 Difference]: Start difference. First operand has 62 places, 70 transitions, 152 flow. Second operand 6 states and 645 transitions. [2023-08-26 20:52:09,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 104 transitions, 424 flow [2023-08-26 20:52:09,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 104 transitions, 422 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 20:52:09,434 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 190 flow [2023-08-26 20:52:09,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-08-26 20:52:09,435 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-26 20:52:09,435 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 190 flow [2023-08-26 20:52:09,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:09,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:09,436 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 20:52:09,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:52:09,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 20:52:09,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:09,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1651282320, now seen corresponding path program 1 times [2023-08-26 20:52:09,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:09,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992421856] [2023-08-26 20:52:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:09,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:52:09,447 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:52:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:52:09,456 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:52:09,457 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:52:09,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-26 20:52:09,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2023-08-26 20:52:09,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (4 of 7 remaining) [2023-08-26 20:52:09,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 7 remaining) [2023-08-26 20:52:09,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 20:52:09,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 20:52:09,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 20:52:09,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:52:09,458 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 20:52:09,459 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:52:09,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 20:52:09,497 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:52:09,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 213 transitions, 447 flow [2023-08-26 20:52:09,533 INFO L124 PetriNetUnfolderBase]: 25/247 cut-off events. [2023-08-26 20:52:09,533 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:52:09,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 247 events. 25/247 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 896 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-08-26 20:52:09,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 213 transitions, 447 flow [2023-08-26 20:52:09,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 213 transitions, 447 flow [2023-08-26 20:52:09,539 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:52:09,539 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 213 transitions, 447 flow [2023-08-26 20:52:09,540 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 213 transitions, 447 flow [2023-08-26 20:52:09,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 213 transitions, 447 flow [2023-08-26 20:52:09,566 INFO L124 PetriNetUnfolderBase]: 25/247 cut-off events. [2023-08-26 20:52:09,566 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:52:09,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 247 events. 25/247 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 896 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-08-26 20:52:09,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 27450 [2023-08-26 20:52:13,085 INFO L134 LiptonReduction]: Checked pairs total: 102446 [2023-08-26 20:52:13,085 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-08-26 20:52:13,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:52:13,088 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;@42308949, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:52:13,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 20:52:13,092 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:52:13,092 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2023-08-26 20:52:13,092 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:52:13,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:13,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:52:13,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-26 20:52:13,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1168472665, now seen corresponding path program 1 times [2023-08-26 20:52:13,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:13,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440220799] [2023-08-26 20:52:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:13,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:52:13,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:52:13,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440220799] [2023-08-26 20:52:13,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440220799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:52:13,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:52:13,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:52:13,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662512502] [2023-08-26 20:52:13,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:52:13,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:52:13,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:52:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:52:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:52:13,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 409 [2023-08-26 20:52:13,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:13,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:52:13,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 409 [2023-08-26 20:52:13,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:52:16,919 INFO L124 PetriNetUnfolderBase]: 33658/47507 cut-off events. [2023-08-26 20:52:16,919 INFO L125 PetriNetUnfolderBase]: For 1804/1804 co-relation queries the response was YES. [2023-08-26 20:52:16,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95475 conditions, 47507 events. 33658/47507 cut-off events. For 1804/1804 co-relation queries the response was YES. Maximal size of possible extension queue 2243. Compared 329102 event pairs, 14862 based on Foata normal form. 1330/38935 useless extension candidates. Maximal degree in co-relation 17279. Up to 44279 conditions per place. [2023-08-26 20:52:17,237 INFO L140 encePairwiseOnDemand]: 389/409 looper letters, 93 selfloop transitions, 4 changer transitions 0/106 dead transitions. [2023-08-26 20:52:17,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 439 flow [2023-08-26 20:52:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:52:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:52:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-26 20:52:17,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39364303178484106 [2023-08-26 20:52:17,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-26 20:52:17,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-26 20:52:17,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:52:17,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-26 20:52:17,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:17,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:17,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:17,247 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 219 flow. Second operand 3 states and 483 transitions. [2023-08-26 20:52:17,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 439 flow [2023-08-26 20:52:17,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 106 transitions, 431 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-26 20:52:17,252 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 215 flow [2023-08-26 20:52:17,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2023-08-26 20:52:17,253 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -5 predicate places. [2023-08-26 20:52:17,254 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 215 flow [2023-08-26 20:52:17,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:17,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:17,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:52:17,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:52:17,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-26 20:52:17,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:17,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1383953657, now seen corresponding path program 1 times [2023-08-26 20:52:17,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:17,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59037542] [2023-08-26 20:52:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:17,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:52:17,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:52:17,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59037542] [2023-08-26 20:52:17,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59037542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:52:17,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:52:17,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:52:17,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387567561] [2023-08-26 20:52:17,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:52:17,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:52:17,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:52:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:52:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:52:17,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 409 [2023-08-26 20:52:17,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:17,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:52:17,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 409 [2023-08-26 20:52:17,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:52:21,670 INFO L124 PetriNetUnfolderBase]: 45176/64364 cut-off events. [2023-08-26 20:52:21,671 INFO L125 PetriNetUnfolderBase]: For 5867/5867 co-relation queries the response was YES. [2023-08-26 20:52:21,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134743 conditions, 64364 events. 45176/64364 cut-off events. For 5867/5867 co-relation queries the response was YES. Maximal size of possible extension queue 3432. Compared 478879 event pairs, 15121 based on Foata normal form. 310/55245 useless extension candidates. Maximal degree in co-relation 100730. Up to 27445 conditions per place. [2023-08-26 20:52:22,006 INFO L140 encePairwiseOnDemand]: 397/409 looper letters, 203 selfloop transitions, 14 changer transitions 0/226 dead transitions. [2023-08-26 20:52:22,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 226 transitions, 993 flow [2023-08-26 20:52:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 20:52:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 20:52:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 941 transitions. [2023-08-26 20:52:22,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3834555827220864 [2023-08-26 20:52:22,010 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 941 transitions. [2023-08-26 20:52:22,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 941 transitions. [2023-08-26 20:52:22,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:52:22,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 941 transitions. [2023-08-26 20:52:22,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.83333333333334) internal successors, (941), 6 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:22,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:22,018 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:22,018 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 215 flow. Second operand 6 states and 941 transitions. [2023-08-26 20:52:22,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 226 transitions, 993 flow [2023-08-26 20:52:22,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 226 transitions, 987 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:52:22,024 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 302 flow [2023-08-26 20:52:22,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2023-08-26 20:52:22,025 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2023-08-26 20:52:22,025 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 302 flow [2023-08-26 20:52:22,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:22,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:22,026 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 20:52:22,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:52:22,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-26 20:52:22,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:22,027 INFO L85 PathProgramCache]: Analyzing trace with hash -391524946, now seen corresponding path program 1 times [2023-08-26 20:52:22,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:22,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213401176] [2023-08-26 20:52:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:22,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:52:22,043 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:52:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:52:22,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:52:22,060 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:52:22,060 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-26 20:52:22,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (7 of 9 remaining) [2023-08-26 20:52:22,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (6 of 9 remaining) [2023-08-26 20:52:22,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 9 remaining) [2023-08-26 20:52:22,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (4 of 9 remaining) [2023-08-26 20:52:22,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 20:52:22,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (2 of 9 remaining) [2023-08-26 20:52:22,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 9 remaining) [2023-08-26 20:52:22,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 20:52:22,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:52:22,061 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 20:52:22,062 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:52:22,062 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 20:52:22,098 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:52:22,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 275 transitions, 582 flow [2023-08-26 20:52:22,145 INFO L124 PetriNetUnfolderBase]: 33/321 cut-off events. [2023-08-26 20:52:22,145 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 20:52:22,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 321 events. 33/321 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1276 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 256. Up to 10 conditions per place. [2023-08-26 20:52:22,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 275 transitions, 582 flow [2023-08-26 20:52:22,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 275 transitions, 582 flow [2023-08-26 20:52:22,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:52:22,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 275 transitions, 582 flow [2023-08-26 20:52:22,155 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 275 transitions, 582 flow [2023-08-26 20:52:22,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 275 transitions, 582 flow [2023-08-26 20:52:22,197 INFO L124 PetriNetUnfolderBase]: 33/321 cut-off events. [2023-08-26 20:52:22,197 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 20:52:22,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 321 events. 33/321 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1276 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 256. Up to 10 conditions per place. [2023-08-26 20:52:22,218 INFO L119 LiptonReduction]: Number of co-enabled transitions 51728 [2023-08-26 20:52:26,539 INFO L134 LiptonReduction]: Checked pairs total: 200982 [2023-08-26 20:52:26,539 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-08-26 20:52:26,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:52:26,542 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;@42308949, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:52:26,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 20:52:26,545 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:52:26,546 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2023-08-26 20:52:26,546 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:52:26,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:52:26,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:52:26,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-08-26 20:52:26,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:52:26,546 INFO L85 PathProgramCache]: Analyzing trace with hash 244374694, now seen corresponding path program 1 times [2023-08-26 20:52:26,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:52:26,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766086742] [2023-08-26 20:52:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:52:26,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:52:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:52:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:52:26,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:52:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766086742] [2023-08-26 20:52:26,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766086742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:52:26,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:52:26,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:52:26,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302973798] [2023-08-26 20:52:26,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:52:26,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 20:52:26,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:52:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 20:52:26,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 20:52:26,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 532 [2023-08-26 20:52:26,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 136 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:52:26,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:52:26,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 532 [2023-08-26 20:52:26,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand