/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 16:35:10,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 16:35:10,138 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 [2023-08-25 16:35:10,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 16:35:10,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 16:35:10,176 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 16:35:10,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 16:35:10,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 16:35:10,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 16:35:10,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 16:35:10,182 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 16:35:10,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 16:35:10,183 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 16:35:10,184 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 16:35:10,184 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 16:35:10,184 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 16:35:10,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 16:35:10,185 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 16:35:10,185 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 16:35:10,185 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 16:35:10,185 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 16:35:10,186 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 16:35:10,186 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 16:35:10,187 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 16:35:10,187 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 16:35:10,187 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 16:35:10,187 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 16:35:10,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 16:35:10,188 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 16:35:10,188 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 16:35:10,189 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 16:35:10,189 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 16:35:10,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 16:35:10,189 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 16:35:10,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 16:35:10,190 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 16:35:10,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 16:35:10,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 16:35:10,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 16:35:10,491 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 16:35:10,491 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 16:35:10,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-25 16:35:11,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 16:35:12,069 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 16:35:12,070 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-25 16:35:12,099 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76681b8ee/86356c5a5e2a4de7beb81e4ccf1484d3/FLAG21ce27c80 [2023-08-25 16:35:12,112 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76681b8ee/86356c5a5e2a4de7beb81e4ccf1484d3 [2023-08-25 16:35:12,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 16:35:12,115 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 16:35:12,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 16:35:12,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 16:35:12,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 16:35:12,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:12,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a2a37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12, skipping insertion in model container [2023-08-25 16:35:12,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:12,178 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 16:35:12,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 16:35:12,795 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 16:35:12,815 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [127] [2023-08-25 16:35:12,829 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [573] [2023-08-25 16:35:12,829 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [574] [2023-08-25 16:35:12,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 16:35:12,986 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-25 16:35:12,987 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-25 16:35:12,993 INFO L206 MainTranslator]: Completed translation [2023-08-25 16:35:12,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12 WrapperNode [2023-08-25 16:35:12,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 16:35:12,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 16:35:12,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 16:35:12,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 16:35:13,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,107 INFO L138 Inliner]: procedures = 481, calls = 75, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 477 [2023-08-25 16:35:13,107 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 16:35:13,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 16:35:13,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 16:35:13,108 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 16:35:13,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,123 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,123 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,149 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,191 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 16:35:13,192 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 16:35:13,192 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 16:35:13,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 16:35:13,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (1/1) ... [2023-08-25 16:35:13,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 16:35:13,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 16:35:13,226 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) [2023-08-25 16:35:13,236 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 [2023-08-25 16:35:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-25 16:35:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 16:35:13,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-25 16:35:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 16:35:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 16:35:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-08-25 16:35:13,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-08-25 16:35:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 16:35:13,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 16:35:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 16:35:13,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 16:35:13,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 16:35:13,258 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 16:35:13,527 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 16:35:13,529 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 16:35:14,166 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 16:35:14,406 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 16:35:14,406 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-25 16:35:14,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:35:14 BoogieIcfgContainer [2023-08-25 16:35:14,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 16:35:14,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 16:35:14,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 16:35:14,413 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 16:35:14,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 04:35:12" (1/3) ... [2023-08-25 16:35:14,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acf3186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:35:14, skipping insertion in model container [2023-08-25 16:35:14,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:35:12" (2/3) ... [2023-08-25 16:35:14,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acf3186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:35:14, skipping insertion in model container [2023-08-25 16:35:14,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:35:14" (3/3) ... [2023-08-25 16:35:14,415 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-08-25 16:35:14,431 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 16:35:14,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-08-25 16:35:14,431 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 16:35:14,569 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 16:35:14,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 309 places, 324 transitions, 656 flow [2023-08-25 16:35:14,751 INFO L124 PetriNetUnfolderBase]: 20/344 cut-off events. [2023-08-25 16:35:14,752 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 16:35:14,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 344 events. 20/344 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 689 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 254. Up to 4 conditions per place. [2023-08-25 16:35:14,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 309 places, 324 transitions, 656 flow [2023-08-25 16:35:14,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 301 places, 315 transitions, 635 flow [2023-08-25 16:35:14,780 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 16:35:14,791 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 301 places, 315 transitions, 635 flow [2023-08-25 16:35:14,795 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 301 places, 315 transitions, 635 flow [2023-08-25 16:35:14,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 301 places, 315 transitions, 635 flow [2023-08-25 16:35:14,876 INFO L124 PetriNetUnfolderBase]: 19/335 cut-off events. [2023-08-25 16:35:14,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 16:35:14,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 335 events. 19/335 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 634 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 254. Up to 4 conditions per place. [2023-08-25 16:35:14,886 INFO L119 LiptonReduction]: Number of co-enabled transitions 11908 [2023-08-25 16:35:56,478 INFO L134 LiptonReduction]: Checked pairs total: 33312 [2023-08-25 16:35:56,479 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-08-25 16:35:56,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 16:35:56,495 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;@302e51bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 16:35:56,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 16:35:56,499 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 16:35:56,500 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-08-25 16:35:56,500 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 16:35:56,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 16:35:56,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-25 16:35:56,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 16:35:56,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 16:35:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 172227930, now seen corresponding path program 1 times [2023-08-25 16:35:56,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 16:35:56,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254315207] [2023-08-25 16:35:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:35:56,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 16:35:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:35:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 16:35:56,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 16:35:56,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254315207] [2023-08-25 16:35:56,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254315207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 16:35:56,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 16:35:56,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 16:35:56,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130026289] [2023-08-25 16:35:56,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 16:35:56,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 16:35:56,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 16:35:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 16:35:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 16:35:56,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 617 [2023-08-25 16:35:56,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 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) [2023-08-25 16:35:56,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 16:35:56,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 617 [2023-08-25 16:35:56,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 16:35:57,213 INFO L124 PetriNetUnfolderBase]: 97/339 cut-off events. [2023-08-25 16:35:57,213 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 16:35:57,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 339 events. 97/339 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1150 event pairs, 72 based on Foata normal form. 8/282 useless extension candidates. Maximal degree in co-relation 520. Up to 202 conditions per place. [2023-08-25 16:35:57,216 INFO L140 encePairwiseOnDemand]: 588/617 looper letters, 35 selfloop transitions, 2 changer transitions 7/76 dead transitions. [2023-08-25 16:35:57,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 233 flow [2023-08-25 16:35:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 16:35:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 16:35:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2023-08-25 16:35:57,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629929767693139 [2023-08-25 16:35:57,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2023-08-25 16:35:57,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2023-08-25 16:35:57,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 16:35:57,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2023-08-25 16:35:57,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 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) [2023-08-25 16:35:57,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 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) [2023-08-25 16:35:57,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 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) [2023-08-25 16:35:57,257 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 207 flow. Second operand 3 states and 857 transitions. [2023-08-25 16:35:57,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 233 flow [2023-08-25 16:35:57,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 16:35:57,262 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 153 flow [2023-08-25 16:35:57,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-08-25 16:35:57,266 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -19 predicate places. [2023-08-25 16:35:57,266 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 153 flow [2023-08-25 16:35:57,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 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) [2023-08-25 16:35:57,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 16:35:57,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-25 16:35:57,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 16:35:57,267 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 16:35:57,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 16:35:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1689167859, now seen corresponding path program 1 times [2023-08-25 16:35:57,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 16:35:57,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522002444] [2023-08-25 16:35:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:35:57,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 16:35:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:35:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 16:35:57,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 16:35:57,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522002444] [2023-08-25 16:35:57,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522002444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 16:35:57,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262250102] [2023-08-25 16:35:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:35:57,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 16:35:57,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 16:35:57,381 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) [2023-08-25 16:35:57,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-25 16:35:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:35:57,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-25 16:35:57,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 16:35:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 16:35:57,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 16:35:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 16:35:57,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262250102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 16:35:57,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 16:35:57,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-25 16:35:57,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730644699] [2023-08-25 16:35:57,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 16:35:57,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-25 16:35:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 16:35:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-25 16:35:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-25 16:35:57,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 617 [2023-08-25 16:35:57,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 265.5) internal successors, (2124), 8 states have internal predecessors, (2124), 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) [2023-08-25 16:35:57,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 16:35:57,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 617 [2023-08-25 16:35:57,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 16:35:57,967 INFO L124 PetriNetUnfolderBase]: 67/241 cut-off events. [2023-08-25 16:35:57,967 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 16:35:57,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 241 events. 67/241 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 654 event pairs, 48 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 390. Up to 146 conditions per place. [2023-08-25 16:35:57,968 INFO L140 encePairwiseOnDemand]: 614/617 looper letters, 35 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-25 16:35:57,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 233 flow [2023-08-25 16:35:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-25 16:35:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-25 16:35:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1095 transitions. [2023-08-25 16:35:57,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436790923824959 [2023-08-25 16:35:57,974 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1095 transitions. [2023-08-25 16:35:57,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1095 transitions. [2023-08-25 16:35:57,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 16:35:57,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1095 transitions. [2023-08-25 16:35:57,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 273.75) internal successors, (1095), 4 states have internal predecessors, (1095), 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) [2023-08-25 16:35:57,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 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) [2023-08-25 16:35:57,989 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 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) [2023-08-25 16:35:57,993 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 153 flow. Second operand 4 states and 1095 transitions. [2023-08-25 16:35:57,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 233 flow [2023-08-25 16:35:57,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 229 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-25 16:35:57,997 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 165 flow [2023-08-25 16:35:57,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-08-25 16:35:57,998 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -23 predicate places. [2023-08-25 16:35:57,998 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 165 flow [2023-08-25 16:35:57,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 265.5) internal successors, (2124), 8 states have internal predecessors, (2124), 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) [2023-08-25 16:35:57,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 16:35:57,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-25 16:35:58,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-25 16:35:58,211 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 [2023-08-25 16:35:58,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 16:35:58,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 16:35:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1469665402, now seen corresponding path program 2 times [2023-08-25 16:35:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 16:35:58,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794925147] [2023-08-25 16:35:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:35:58,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 16:35:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 16:35:58,252 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 16:35:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 16:35:58,301 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 16:35:58,301 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 16:35:58,302 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 16:35:58,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 16:35:58,303 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-25 16:35:58,306 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 16:35:58,307 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 16:35:58,307 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 16:35:58,473 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 16:35:58,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 528 places, 555 transitions, 1128 flow [2023-08-25 16:35:58,598 INFO L124 PetriNetUnfolderBase]: 38/623 cut-off events. [2023-08-25 16:35:58,599 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 16:35:58,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 623 events. 38/623 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2316 event pairs, 0 based on Foata normal form. 0/517 useless extension candidates. Maximal degree in co-relation 502. Up to 8 conditions per place. [2023-08-25 16:35:58,612 INFO L82 GeneralOperation]: Start removeDead. Operand has 528 places, 555 transitions, 1128 flow [2023-08-25 16:35:58,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 524 places, 551 transitions, 1120 flow [2023-08-25 16:35:58,618 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 16:35:58,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 524 places, 551 transitions, 1120 flow [2023-08-25 16:35:58,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 524 places, 551 transitions, 1120 flow [2023-08-25 16:35:58,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 524 places, 551 transitions, 1120 flow [2023-08-25 16:35:58,744 INFO L124 PetriNetUnfolderBase]: 38/619 cut-off events. [2023-08-25 16:35:58,744 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 16:35:58,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 619 events. 38/619 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2309 event pairs, 0 based on Foata normal form. 0/517 useless extension candidates. Maximal degree in co-relation 502. Up to 8 conditions per place. [2023-08-25 16:35:58,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 133736 [2023-08-25 16:37:19,334 INFO L134 LiptonReduction]: Checked pairs total: 385321 [2023-08-25 16:37:19,334 INFO L136 LiptonReduction]: Total number of compositions: 489 [2023-08-25 16:37:19,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 16:37:19,337 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;@302e51bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 16:37:19,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 16:37:19,342 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 16:37:19,342 INFO L124 PetriNetUnfolderBase]: 3/50 cut-off events. [2023-08-25 16:37:19,342 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 16:37:19,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 16:37:19,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 16:37:19,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 16:37:19,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 16:37:19,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1282741875, now seen corresponding path program 1 times [2023-08-25 16:37:19,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 16:37:19,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145814428] [2023-08-25 16:37:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:37:19,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 16:37:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:37:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 16:37:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 16:37:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145814428] [2023-08-25 16:37:19,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145814428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 16:37:19,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 16:37:19,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 16:37:19,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091276513] [2023-08-25 16:37:19,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 16:37:19,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 16:37:19,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 16:37:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 16:37:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 16:37:19,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 457 out of 1044 [2023-08-25 16:37:19,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 207 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 459.0) internal successors, (1377), 3 states have internal predecessors, (1377), 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) [2023-08-25 16:37:19,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 16:37:19,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 457 of 1044 [2023-08-25 16:37:19,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 16:37:22,502 INFO L124 PetriNetUnfolderBase]: 12487/24619 cut-off events. [2023-08-25 16:37:22,502 INFO L125 PetriNetUnfolderBase]: For 286/336 co-relation queries the response was YES. [2023-08-25 16:37:22,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43203 conditions, 24619 events. 12487/24619 cut-off events. For 286/336 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 210266 event pairs, 10191 based on Foata normal form. 905/20229 useless extension candidates. Maximal degree in co-relation 36254. Up to 18412 conditions per place. [2023-08-25 16:37:22,598 INFO L140 encePairwiseOnDemand]: 990/1044 looper letters, 77 selfloop transitions, 2 changer transitions 13/156 dead transitions. [2023-08-25 16:37:22,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 156 transitions, 500 flow [2023-08-25 16:37:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 16:37:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 16:37:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1508 transitions. [2023-08-25 16:37:22,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-25 16:37:22,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1508 transitions. [2023-08-25 16:37:22,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1508 transitions. [2023-08-25 16:37:22,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 16:37:22,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1508 transitions. [2023-08-25 16:37:22,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 502.6666666666667) internal successors, (1508), 3 states have internal predecessors, (1508), 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) [2023-08-25 16:37:22,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1044.0) internal successors, (4176), 4 states have internal predecessors, (4176), 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) [2023-08-25 16:37:22,615 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1044.0) internal successors, (4176), 4 states have internal predecessors, (4176), 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) [2023-08-25 16:37:22,615 INFO L175 Difference]: Start difference. First operand has 188 places, 207 transitions, 432 flow. Second operand 3 states and 1508 transitions. [2023-08-25 16:37:22,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 156 transitions, 500 flow [2023-08-25 16:37:22,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 156 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 16:37:22,622 INFO L231 Difference]: Finished difference. Result has 148 places, 143 transitions, 308 flow [2023-08-25 16:37:22,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1044, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=308, PETRI_PLACES=148, PETRI_TRANSITIONS=143} [2023-08-25 16:37:22,624 INFO L281 CegarLoopForPetriNet]: 188 programPoint places, -40 predicate places. [2023-08-25 16:37:22,624 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 143 transitions, 308 flow [2023-08-25 16:37:22,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 459.0) internal successors, (1377), 3 states have internal predecessors, (1377), 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) [2023-08-25 16:37:22,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 16:37:22,625 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-25 16:37:22,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 16:37:22,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 16:37:22,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 16:37:22,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1581557197, now seen corresponding path program 1 times [2023-08-25 16:37:22,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 16:37:22,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229781610] [2023-08-25 16:37:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:37:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 16:37:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:37:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 16:37:22,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 16:37:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229781610] [2023-08-25 16:37:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229781610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 16:37:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589696303] [2023-08-25 16:37:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:37:22,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 16:37:22,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 16:37:22,759 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) [2023-08-25 16:37:22,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-25 16:37:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:37:22,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-25 16:37:22,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 16:37:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 16:37:22,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 16:37:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 16:37:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589696303] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 16:37:22,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 16:37:22,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 16:37:22,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972739366] [2023-08-25 16:37:22,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 16:37:22,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 16:37:22,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 16:37:22,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 16:37:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-25 16:37:22,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 457 out of 1044 [2023-08-25 16:37:22,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 143 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 458.7142857142857) internal successors, (3211), 7 states have internal predecessors, (3211), 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) [2023-08-25 16:37:22,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 16:37:22,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 457 of 1044 [2023-08-25 16:37:22,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 16:37:24,620 INFO L124 PetriNetUnfolderBase]: 5675/11571 cut-off events. [2023-08-25 16:37:24,620 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-08-25 16:37:24,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20251 conditions, 11571 events. 5675/11571 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 90695 event pairs, 4558 based on Foata normal form. 0/9926 useless extension candidates. Maximal degree in co-relation 20238. Up to 8562 conditions per place. [2023-08-25 16:37:24,666 INFO L140 encePairwiseOnDemand]: 1041/1044 looper letters, 77 selfloop transitions, 3 changer transitions 0/144 dead transitions. [2023-08-25 16:37:24,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 144 transitions, 472 flow [2023-08-25 16:37:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-25 16:37:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-25 16:37:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1909 transitions. [2023-08-25 16:37:24,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4571360153256705 [2023-08-25 16:37:24,672 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1909 transitions. [2023-08-25 16:37:24,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1909 transitions. [2023-08-25 16:37:24,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 16:37:24,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1909 transitions. [2023-08-25 16:37:24,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 477.25) internal successors, (1909), 4 states have internal predecessors, (1909), 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) [2023-08-25 16:37:24,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1044.0) internal successors, (5220), 5 states have internal predecessors, (5220), 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) [2023-08-25 16:37:24,687 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1044.0) internal successors, (5220), 5 states have internal predecessors, (5220), 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) [2023-08-25 16:37:24,687 INFO L175 Difference]: Start difference. First operand has 148 places, 143 transitions, 308 flow. Second operand 4 states and 1909 transitions. [2023-08-25 16:37:24,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 144 transitions, 472 flow [2023-08-25 16:37:24,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 144 transitions, 466 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-25 16:37:24,690 INFO L231 Difference]: Finished difference. Result has 140 places, 144 transitions, 318 flow [2023-08-25 16:37:24,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1044, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=140, PETRI_TRANSITIONS=144} [2023-08-25 16:37:24,691 INFO L281 CegarLoopForPetriNet]: 188 programPoint places, -48 predicate places. [2023-08-25 16:37:24,692 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 144 transitions, 318 flow [2023-08-25 16:37:24,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 458.7142857142857) internal successors, (3211), 7 states have internal predecessors, (3211), 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) [2023-08-25 16:37:24,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 16:37:24,694 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 16:37:24,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-25 16:37:24,899 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 [2023-08-25 16:37:24,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 16:37:24,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 16:37:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 180515213, now seen corresponding path program 2 times [2023-08-25 16:37:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 16:37:24,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890001632] [2023-08-25 16:37:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:37:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 16:37:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 16:37:24,977 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 16:37:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 16:37:25,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 16:37:25,009 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 16:37:25,009 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 16:37:25,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 16:37:25,009 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-25 16:37:25,010 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 16:37:25,010 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 16:37:25,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 16:37:25,118 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 16:37:25,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 747 places, 786 transitions, 1602 flow [2023-08-25 16:37:25,454 INFO L124 PetriNetUnfolderBase]: 61/941 cut-off events. [2023-08-25 16:37:25,454 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 16:37:25,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 941 events. 61/941 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4574 event pairs, 1 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 771. Up to 16 conditions per place. [2023-08-25 16:37:25,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 747 places, 786 transitions, 1602 flow [2023-08-25 16:37:25,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 743 places, 782 transitions, 1594 flow [2023-08-25 16:37:25,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 16:37:25,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 743 places, 782 transitions, 1594 flow [2023-08-25 16:37:25,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 743 places, 782 transitions, 1594 flow [2023-08-25 16:37:25,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 743 places, 782 transitions, 1594 flow [2023-08-25 16:37:25,750 INFO L124 PetriNetUnfolderBase]: 61/937 cut-off events. [2023-08-25 16:37:25,750 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 16:37:25,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 937 events. 61/937 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4569 event pairs, 1 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 771. Up to 16 conditions per place. [2023-08-25 16:37:25,937 INFO L119 LiptonReduction]: Number of co-enabled transitions 359988 [2023-08-25 16:39:17,837 INFO L134 LiptonReduction]: Checked pairs total: 1061651 [2023-08-25 16:39:17,837 INFO L136 LiptonReduction]: Total number of compositions: 694 [2023-08-25 16:39:17,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 16:39:17,839 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;@302e51bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 16:39:17,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 16:39:17,847 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 16:39:17,847 INFO L124 PetriNetUnfolderBase]: 6/92 cut-off events. [2023-08-25 16:39:17,848 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-25 16:39:17,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 16:39:17,848 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-25 16:39:17,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 16:39:17,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 16:39:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1250922268, now seen corresponding path program 1 times [2023-08-25 16:39:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 16:39:17,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289431204] [2023-08-25 16:39:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:39:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 16:39:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:39:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 16:39:17,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 16:39:17,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289431204] [2023-08-25 16:39:17,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289431204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 16:39:17,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 16:39:17,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 16:39:17,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812365361] [2023-08-25 16:39:17,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 16:39:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 16:39:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 16:39:17,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 16:39:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 16:39:17,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 650 out of 1480 [2023-08-25 16:39:17,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 305 transitions, 640 flow. Second operand has 3 states, 3 states have (on average 652.3333333333334) internal successors, (1957), 3 states have internal predecessors, (1957), 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) [2023-08-25 16:39:17,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 16:39:17,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 650 of 1480 [2023-08-25 16:39:17,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 16:40:49,672 INFO L124 PetriNetUnfolderBase]: 590107/949543 cut-off events. [2023-08-25 16:40:49,672 INFO L125 PetriNetUnfolderBase]: For 14421/14974 co-relation queries the response was YES. [2023-08-25 16:40:52,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727822 conditions, 949543 events. 590107/949543 cut-off events. For 14421/14974 co-relation queries the response was YES. Maximal size of possible extension queue 15785. Compared 10105000 event pairs, 484251 based on Foata normal form. 44250/784756 useless extension candidates. Maximal degree in co-relation 680612. Up to 771519 conditions per place. [2023-08-25 16:40:55,430 INFO L140 encePairwiseOnDemand]: 1399/1480 looper letters, 113 selfloop transitions, 2 changer transitions 14/224 dead transitions. [2023-08-25 16:40:55,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 224 transitions, 722 flow [2023-08-25 16:40:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 16:40:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 16:40:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2151 transitions. [2023-08-25 16:40:55,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48445945945945945 [2023-08-25 16:40:55,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2151 transitions. [2023-08-25 16:40:55,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2151 transitions. [2023-08-25 16:40:55,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 16:40:55,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2151 transitions. [2023-08-25 16:40:55,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 717.0) internal successors, (2151), 3 states have internal predecessors, (2151), 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) [2023-08-25 16:40:55,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1480.0) internal successors, (5920), 4 states have internal predecessors, (5920), 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) [2023-08-25 16:40:55,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1480.0) internal successors, (5920), 4 states have internal predecessors, (5920), 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) [2023-08-25 16:40:55,487 INFO L175 Difference]: Start difference. First operand has 275 places, 305 transitions, 640 flow. Second operand 3 states and 2151 transitions. [2023-08-25 16:40:55,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 224 transitions, 722 flow [2023-08-25 16:40:55,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 224 transitions, 722 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 16:40:55,512 INFO L231 Difference]: Finished difference. Result has 211 places, 210 transitions, 451 flow [2023-08-25 16:40:55,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1480, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=451, PETRI_PLACES=211, PETRI_TRANSITIONS=210} [2023-08-25 16:40:55,514 INFO L281 CegarLoopForPetriNet]: 275 programPoint places, -64 predicate places. [2023-08-25 16:40:55,514 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 210 transitions, 451 flow [2023-08-25 16:40:55,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 652.3333333333334) internal successors, (1957), 3 states have internal predecessors, (1957), 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) [2023-08-25 16:40:55,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 16:40:55,515 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 16:40:55,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 16:40:55,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 16:40:55,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 16:40:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1447020467, now seen corresponding path program 1 times [2023-08-25 16:40:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 16:40:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010471515] [2023-08-25 16:40:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:40:55,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 16:40:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:40:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 16:40:55,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 16:40:55,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010471515] [2023-08-25 16:40:55,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010471515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 16:40:55,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37994019] [2023-08-25 16:40:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 16:40:55,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 16:40:55,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 16:40:55,711 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) [2023-08-25 16:40:55,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-25 16:40:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 16:40:56,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-25 16:40:56,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 16:40:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 16:40:56,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 16:40:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 16:40:56,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37994019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 16:40:56,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 16:40:56,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-25 16:40:56,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374260795] [2023-08-25 16:40:56,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 16:40:56,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-25 16:40:56,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 16:40:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-25 16:40:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-25 16:40:56,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 650 out of 1480 [2023-08-25 16:40:56,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 210 transitions, 451 flow. Second operand has 8 states, 8 states have (on average 651.75) internal successors, (5214), 8 states have internal predecessors, (5214), 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) [2023-08-25 16:40:56,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 16:40:56,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 650 of 1480 [2023-08-25 16:40:56,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand