/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.signed.integer.overflows true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 05:22:49,467 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 05:22:49,551 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 [2023-08-27 05:22:49,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 05:22:49,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 05:22:49,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 05:22:49,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 05:22:49,588 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 05:22:49,588 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 05:22:49,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 05:22:49,592 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 05:22:49,592 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 05:22:49,593 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 05:22:49,594 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 05:22:49,594 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 05:22:49,594 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 05:22:49,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 05:22:49,595 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 05:22:49,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 05:22:49,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 05:22:49,595 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 05:22:49,596 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 05:22:49,596 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 05:22:49,597 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 05:22:49,597 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 05:22:49,597 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 05:22:49,598 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 05:22:49,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:22:49,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 05:22:49,598 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 05:22:49,599 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 05:22:49,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 05:22:49,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 05:22:49,600 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 05:22:49,600 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 05:22:49,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 05:22:49,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 05:22:49,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 05:22:49,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 05:22:49,928 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 05:22:49,928 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 05:22:49,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-27 05:22:51,090 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 05:22:51,407 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 05:22:51,408 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-27 05:22:51,428 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56c699cfa/1f4bcfb88aee4ae2b2767feb4dcbcee4/FLAG8dc7baca1 [2023-08-27 05:22:51,444 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56c699cfa/1f4bcfb88aee4ae2b2767feb4dcbcee4 [2023-08-27 05:22:51,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 05:22:51,449 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 05:22:51,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 05:22:51,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 05:22:51,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 05:22:51,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:22:51" (1/1) ... [2023-08-27 05:22:51,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b01087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:51, skipping insertion in model container [2023-08-27 05:22:51,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:22:51" (1/1) ... [2023-08-27 05:22:51,512 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 05:22:51,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:22:51,968 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 05:22:51,993 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:22:51,995 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:22:52,019 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-27 05:22:52,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:22:52,108 INFO L206 MainTranslator]: Completed translation [2023-08-27 05:22:52,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52 WrapperNode [2023-08-27 05:22:52,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 05:22:52,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 05:22:52,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 05:22:52,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 05:22:52,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,167 INFO L138 Inliner]: procedures = 270, calls = 42, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 213 [2023-08-27 05:22:52,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 05:22:52,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 05:22:52,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 05:22:52,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 05:22:52,179 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 05:22:52,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 05:22:52,203 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 05:22:52,203 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 05:22:52,204 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (1/1) ... [2023-08-27 05:22:52,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:22:52,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:22:52,234 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) [2023-08-27 05:22:52,260 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 [2023-08-27 05:22:52,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 05:22:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 05:22:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 05:22:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 05:22:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 05:22:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 05:22:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-27 05:22:52,277 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-27 05:22:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 05:22:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 05:22:52,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 05:22:52,279 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 05:22:52,467 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 05:22:52,468 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 05:22:52,797 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 05:22:52,804 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 05:22:52,804 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-27 05:22:52,806 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:22:52 BoogieIcfgContainer [2023-08-27 05:22:52,806 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 05:22:52,808 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 05:22:52,808 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 05:22:52,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 05:22:52,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:22:51" (1/3) ... [2023-08-27 05:22:52,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723257b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:22:52, skipping insertion in model container [2023-08-27 05:22:52,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:22:52" (2/3) ... [2023-08-27 05:22:52,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723257b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:22:52, skipping insertion in model container [2023-08-27 05:22:52,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:22:52" (3/3) ... [2023-08-27 05:22:52,813 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-08-27 05:22:52,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 05:22:52,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-27 05:22:52,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 05:22:52,887 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-27 05:22:52,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 229 transitions, 466 flow [2023-08-27 05:22:52,996 INFO L124 PetriNetUnfolderBase]: 48/313 cut-off events. [2023-08-27 05:22:52,996 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-27 05:22:53,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 313 events. 48/313 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1123 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-27 05:22:53,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 229 transitions, 466 flow [2023-08-27 05:22:53,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 218 transitions, 441 flow [2023-08-27 05:22:53,023 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:22:53,031 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 218 transitions, 441 flow [2023-08-27 05:22:53,033 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 218 transitions, 441 flow [2023-08-27 05:22:53,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 218 transitions, 441 flow [2023-08-27 05:22:53,079 INFO L124 PetriNetUnfolderBase]: 47/302 cut-off events. [2023-08-27 05:22:53,079 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:22:53,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 302 events. 47/302 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1074 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-08-27 05:22:53,089 INFO L119 LiptonReduction]: Number of co-enabled transitions 15040 [2023-08-27 05:22:56,430 INFO L134 LiptonReduction]: Checked pairs total: 25501 [2023-08-27 05:22:56,430 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-08-27 05:22:56,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:22:56,446 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;@167a4690, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:22:56,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:22:56,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:22:56,453 INFO L124 PetriNetUnfolderBase]: 12/42 cut-off events. [2023-08-27 05:22:56,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:22:56,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:22:56,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-27 05:22:56,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:22:56,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:22:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash -339939682, now seen corresponding path program 1 times [2023-08-27 05:22:56,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:22:56,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608241582] [2023-08-27 05:22:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:56,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:22:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:22:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:22:56,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:22:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608241582] [2023-08-27 05:22:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608241582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:22:56,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:22:56,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:22:56,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3246510] [2023-08-27 05:22:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:22:56,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:22:56,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:22:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:22:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:22:56,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 429 [2023-08-27 05:22:56,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 77 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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) [2023-08-27 05:22:56,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:22:56,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 429 [2023-08-27 05:22:56,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:22:56,912 INFO L124 PetriNetUnfolderBase]: 521/1089 cut-off events. [2023-08-27 05:22:56,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:22:56,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1089 events. 521/1089 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5946 event pairs, 475 based on Foata normal form. 118/856 useless extension candidates. Maximal degree in co-relation 2053. Up to 1021 conditions per place. [2023-08-27 05:22:56,917 INFO L140 encePairwiseOnDemand]: 403/429 looper letters, 27 selfloop transitions, 2 changer transitions 22/55 dead transitions. [2023-08-27 05:22:56,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 213 flow [2023-08-27 05:22:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 05:22:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 05:22:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-27 05:22:56,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2023-08-27 05:22:56,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-27 05:22:56,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-27 05:22:56,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:22:56,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-27 05:22:56,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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) [2023-08-27 05:22:56,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 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) [2023-08-27 05:22:56,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 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) [2023-08-27 05:22:56,948 INFO L175 Difference]: Start difference. First operand has 55 places, 77 transitions, 159 flow. Second operand 3 states and 637 transitions. [2023-08-27 05:22:56,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 213 flow [2023-08-27 05:22:56,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 05:22:56,953 INFO L231 Difference]: Finished difference. Result has 57 places, 33 transitions, 81 flow [2023-08-27 05:22:56,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=57, PETRI_TRANSITIONS=33} [2023-08-27 05:22:56,958 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-27 05:22:56,958 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 33 transitions, 81 flow [2023-08-27 05:22:56,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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) [2023-08-27 05:22:56,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:22:56,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 05:22:56,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 05:22:56,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:22:56,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:22:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash -154259740, now seen corresponding path program 1 times [2023-08-27 05:22:56,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:22:56,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392763948] [2023-08-27 05:22:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:56,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:22:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:22:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:22:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:22:57,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392763948] [2023-08-27 05:22:57,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392763948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:22:57,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080265156] [2023-08-27 05:22:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:57,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:22:57,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:22:57,118 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) [2023-08-27 05:22:57,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 05:22:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:22:57,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 05:22:57,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:22:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:22:57,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:22:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:22:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080265156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:22:57,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:22:57,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 05:22:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780420887] [2023-08-27 05:22:57,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:22:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 05:22:57,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:22:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 05:22:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 05:22:57,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 429 [2023-08-27 05:22:57,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 33 transitions, 81 flow. Second operand has 7 states, 7 states have (on average 189.57142857142858) internal successors, (1327), 7 states have internal predecessors, (1327), 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) [2023-08-27 05:22:57,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:22:57,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 429 [2023-08-27 05:22:57,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:22:57,425 INFO L124 PetriNetUnfolderBase]: 102/243 cut-off events. [2023-08-27 05:22:57,425 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:22:57,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 243 events. 102/243 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 915 event pairs, 95 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 471. Up to 221 conditions per place. [2023-08-27 05:22:57,427 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 27 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2023-08-27 05:22:57,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 157 flow [2023-08-27 05:22:57,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 05:22:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 05:22:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-08-27 05:22:57,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518259518259518 [2023-08-27 05:22:57,431 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-08-27 05:22:57,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-08-27 05:22:57,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:22:57,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-08-27 05:22:57,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 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) [2023-08-27 05:22:57,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 429.0) internal successors, (3003), 7 states have internal predecessors, (3003), 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) [2023-08-27 05:22:57,443 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 429.0) internal successors, (3003), 7 states have internal predecessors, (3003), 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) [2023-08-27 05:22:57,444 INFO L175 Difference]: Start difference. First operand has 57 places, 33 transitions, 81 flow. Second operand 6 states and 1163 transitions. [2023-08-27 05:22:57,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 157 flow [2023-08-27 05:22:57,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 153 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 05:22:57,449 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 113 flow [2023-08-27 05:22:57,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-27 05:22:57,450 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-08-27 05:22:57,450 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 113 flow [2023-08-27 05:22:57,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.57142857142858) internal successors, (1327), 7 states have internal predecessors, (1327), 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) [2023-08-27 05:22:57,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:22:57,451 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-27 05:22:57,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 05:22:57,658 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 [2023-08-27 05:22:57,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:22:57,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:22:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash -970076130, now seen corresponding path program 2 times [2023-08-27 05:22:57,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:22:57,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574626474] [2023-08-27 05:22:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:57,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:22:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:22:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:22:57,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:22:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574626474] [2023-08-27 05:22:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574626474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:22:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243165134] [2023-08-27 05:22:57,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 05:22:57,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:22:57,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:22:57,804 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) [2023-08-27 05:22:57,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 05:22:57,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 05:22:57,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 05:22:57,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 05:22:57,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:22:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:22:57,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:22:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:22:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243165134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:22:57,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:22:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 05:22:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129330751] [2023-08-27 05:22:57,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:22:57,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 05:22:57,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:22:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 05:22:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 05:22:57,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 429 [2023-08-27 05:22:57,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 113 flow. Second operand has 13 states, 13 states have (on average 189.30769230769232) internal successors, (2461), 13 states have internal predecessors, (2461), 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) [2023-08-27 05:22:57,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:22:57,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 429 [2023-08-27 05:22:57,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:22:58,063 INFO L124 PetriNetUnfolderBase]: 102/249 cut-off events. [2023-08-27 05:22:58,063 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-27 05:22:58,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 249 events. 102/249 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 914 event pairs, 95 based on Foata normal form. 6/158 useless extension candidates. Maximal degree in co-relation 462. Up to 221 conditions per place. [2023-08-27 05:22:58,064 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 27 selfloop transitions, 11 changer transitions 0/42 dead transitions. [2023-08-27 05:22:58,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 225 flow [2023-08-27 05:22:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 05:22:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 05:22:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2300 transitions. [2023-08-27 05:22:58,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467754467754468 [2023-08-27 05:22:58,070 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2300 transitions. [2023-08-27 05:22:58,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2300 transitions. [2023-08-27 05:22:58,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:22:58,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2300 transitions. [2023-08-27 05:22:58,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 191.66666666666666) internal successors, (2300), 12 states have internal predecessors, (2300), 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) [2023-08-27 05:22:58,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 429.0) internal successors, (5577), 13 states have internal predecessors, (5577), 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) [2023-08-27 05:22:58,088 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 429.0) internal successors, (5577), 13 states have internal predecessors, (5577), 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) [2023-08-27 05:22:58,089 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 113 flow. Second operand 12 states and 2300 transitions. [2023-08-27 05:22:58,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 225 flow [2023-08-27 05:22:58,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 211 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 05:22:58,092 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 183 flow [2023-08-27 05:22:58,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-08-27 05:22:58,093 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-08-27 05:22:58,093 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 183 flow [2023-08-27 05:22:58,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.30769230769232) internal successors, (2461), 13 states have internal predecessors, (2461), 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) [2023-08-27 05:22:58,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:22:58,096 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-27 05:22:58,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 05:22:58,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 05:22:58,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:22:58,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:22:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1665481310, now seen corresponding path program 3 times [2023-08-27 05:22:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:22:58,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236681634] [2023-08-27 05:22:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:22:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:22:58,355 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:22:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:22:58,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:22:58,437 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:22:58,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:22:58,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 05:22:58,440 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-27 05:22:58,442 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:22:58,443 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:22:58,443 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 05:22:58,482 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 05:22:58,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 311 transitions, 640 flow [2023-08-27 05:22:58,586 INFO L124 PetriNetUnfolderBase]: 80/516 cut-off events. [2023-08-27 05:22:58,586 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-27 05:22:58,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 516 events. 80/516 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2249 event pairs, 0 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 315. Up to 12 conditions per place. [2023-08-27 05:22:58,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 311 transitions, 640 flow [2023-08-27 05:22:58,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 309 transitions, 636 flow [2023-08-27 05:22:58,597 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:22:58,597 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 309 transitions, 636 flow [2023-08-27 05:22:58,597 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 309 transitions, 636 flow [2023-08-27 05:22:58,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 309 transitions, 636 flow [2023-08-27 05:22:58,651 INFO L124 PetriNetUnfolderBase]: 80/514 cut-off events. [2023-08-27 05:22:58,651 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-27 05:22:58,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 514 events. 80/514 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2243 event pairs, 0 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 313. Up to 12 conditions per place. [2023-08-27 05:22:58,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 45920 [2023-08-27 05:23:02,606 INFO L134 LiptonReduction]: Checked pairs total: 80930 [2023-08-27 05:23:02,607 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-27 05:23:02,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:23:02,609 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;@167a4690, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:23:02,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:23:02,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:23:02,619 INFO L124 PetriNetUnfolderBase]: 35/124 cut-off events. [2023-08-27 05:23:02,619 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 05:23:02,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:23:02,620 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:23:02,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:23:02,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:23:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1268864975, now seen corresponding path program 1 times [2023-08-27 05:23:02,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:23:02,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316196382] [2023-08-27 05:23:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:23:02,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:23:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:23:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:23:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:23:02,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316196382] [2023-08-27 05:23:02,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316196382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:23:02,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:23:02,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:23:02,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316952570] [2023-08-27 05:23:02,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:23:02,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:23:02,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:23:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:23:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:23:02,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 593 [2023-08-27 05:23:02,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2023-08-27 05:23:02,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:23:02,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 593 [2023-08-27 05:23:02,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:23:05,382 INFO L124 PetriNetUnfolderBase]: 20981/33072 cut-off events. [2023-08-27 05:23:05,382 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-27 05:23:05,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63987 conditions, 33072 events. 20981/33072 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 1346. Compared 250164 event pairs, 19766 based on Foata normal form. 4534/26813 useless extension candidates. Maximal degree in co-relation 26990. Up to 30792 conditions per place. [2023-08-27 05:23:05,568 INFO L140 encePairwiseOnDemand]: 559/593 looper letters, 46 selfloop transitions, 2 changer transitions 29/86 dead transitions. [2023-08-27 05:23:05,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 338 flow [2023-08-27 05:23:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 05:23:05,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 05:23:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-27 05:23:05,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48791455874086564 [2023-08-27 05:23:05,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-27 05:23:05,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-27 05:23:05,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:23:05,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-27 05:23:05,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 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) [2023-08-27 05:23:05,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-27 05:23:05,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 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) [2023-08-27 05:23:05,579 INFO L175 Difference]: Start difference. First operand has 84 places, 116 transitions, 250 flow. Second operand 3 states and 868 transitions. [2023-08-27 05:23:05,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 338 flow [2023-08-27 05:23:05,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 05:23:05,582 INFO L231 Difference]: Finished difference. Result has 87 places, 57 transitions, 136 flow [2023-08-27 05:23:05,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=87, PETRI_TRANSITIONS=57} [2023-08-27 05:23:05,583 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2023-08-27 05:23:05,584 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 57 transitions, 136 flow [2023-08-27 05:23:05,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2023-08-27 05:23:05,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:23:05,584 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 05:23:05,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 05:23:05,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:23:05,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:23:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1021204940, now seen corresponding path program 1 times [2023-08-27 05:23:05,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:23:05,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679300986] [2023-08-27 05:23:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:23:05,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:23:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:23:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:23:05,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:23:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679300986] [2023-08-27 05:23:05,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679300986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:23:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949530394] [2023-08-27 05:23:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:23:05,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:23:05,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:23:05,637 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) [2023-08-27 05:23:05,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 05:23:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:23:05,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 05:23:05,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:23:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:23:05,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:23:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:23:05,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949530394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:23:05,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:23:05,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 05:23:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919634405] [2023-08-27 05:23:05,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:23:05,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 05:23:05,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:23:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 05:23:05,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 05:23:05,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 593 [2023-08-27 05:23:05,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 57 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 255.71428571428572) internal successors, (1790), 7 states have internal predecessors, (1790), 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) [2023-08-27 05:23:05,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:23:05,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 593 [2023-08-27 05:23:05,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:23:06,379 INFO L124 PetriNetUnfolderBase]: 4290/6973 cut-off events. [2023-08-27 05:23:06,379 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-27 05:23:06,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13535 conditions, 6973 events. 4290/6973 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 47480 event pairs, 4061 based on Foata normal form. 0/4306 useless extension candidates. Maximal degree in co-relation 13522. Up to 6467 conditions per place. [2023-08-27 05:23:06,407 INFO L140 encePairwiseOnDemand]: 590/593 looper letters, 46 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-27 05:23:06,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 250 flow [2023-08-27 05:23:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 05:23:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 05:23:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1578 transitions. [2023-08-27 05:23:06,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44350758853288363 [2023-08-27 05:23:06,412 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1578 transitions. [2023-08-27 05:23:06,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1578 transitions. [2023-08-27 05:23:06,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:23:06,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1578 transitions. [2023-08-27 05:23:06,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 263.0) internal successors, (1578), 6 states have internal predecessors, (1578), 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) [2023-08-27 05:23:06,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 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) [2023-08-27 05:23:06,422 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 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) [2023-08-27 05:23:06,422 INFO L175 Difference]: Start difference. First operand has 87 places, 57 transitions, 136 flow. Second operand 6 states and 1578 transitions. [2023-08-27 05:23:06,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 250 flow [2023-08-27 05:23:06,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 244 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 05:23:06,424 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 166 flow [2023-08-27 05:23:06,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-27 05:23:06,425 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -16 predicate places. [2023-08-27 05:23:06,425 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 166 flow [2023-08-27 05:23:06,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 255.71428571428572) internal successors, (1790), 7 states have internal predecessors, (1790), 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) [2023-08-27 05:23:06,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:23:06,426 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:23:06,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 05:23:06,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:23:06,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:23:06,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:23:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1349798159, now seen corresponding path program 2 times [2023-08-27 05:23:06,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:23:06,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235790487] [2023-08-27 05:23:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:23:06,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:23:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:23:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:23:06,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:23:06,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235790487] [2023-08-27 05:23:06,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235790487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:23:06,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622091701] [2023-08-27 05:23:06,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 05:23:06,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:23:06,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:23:06,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 05:23:06,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 05:23:06,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 05:23:06,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 05:23:06,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 05:23:06,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:23:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:23:06,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:23:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:23:06,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622091701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:23:06,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:23:06,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 05:23:06,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838852017] [2023-08-27 05:23:06,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:23:06,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 05:23:06,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:23:06,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 05:23:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 05:23:06,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 593 [2023-08-27 05:23:06,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 166 flow. Second operand has 13 states, 13 states have (on average 255.3846153846154) internal successors, (3320), 13 states have internal predecessors, (3320), 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) [2023-08-27 05:23:06,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:23:06,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 593 [2023-08-27 05:23:06,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:23:07,539 INFO L124 PetriNetUnfolderBase]: 4290/6979 cut-off events. [2023-08-27 05:23:07,539 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-27 05:23:07,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13564 conditions, 6979 events. 4290/6979 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 47507 event pairs, 4061 based on Foata normal form. 6/4319 useless extension candidates. Maximal degree in co-relation 13505. Up to 6467 conditions per place. [2023-08-27 05:23:07,570 INFO L140 encePairwiseOnDemand]: 590/593 looper letters, 46 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-08-27 05:23:07,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 316 flow [2023-08-27 05:23:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 05:23:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 05:23:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3111 transitions. [2023-08-27 05:23:07,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371838111298482 [2023-08-27 05:23:07,578 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3111 transitions. [2023-08-27 05:23:07,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3111 transitions. [2023-08-27 05:23:07,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:23:07,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3111 transitions. [2023-08-27 05:23:07,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 259.25) internal successors, (3111), 12 states have internal predecessors, (3111), 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) [2023-08-27 05:23:07,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 593.0) internal successors, (7709), 13 states have internal predecessors, (7709), 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) [2023-08-27 05:23:07,597 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 593.0) internal successors, (7709), 13 states have internal predecessors, (7709), 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) [2023-08-27 05:23:07,597 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 166 flow. Second operand 12 states and 3111 transitions. [2023-08-27 05:23:07,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 316 flow [2023-08-27 05:23:07,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 66 transitions, 302 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 05:23:07,600 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 236 flow [2023-08-27 05:23:07,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=236, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2023-08-27 05:23:07,601 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2023-08-27 05:23:07,601 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 236 flow [2023-08-27 05:23:07,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 255.3846153846154) internal successors, (3320), 13 states have internal predecessors, (3320), 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) [2023-08-27 05:23:07,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:23:07,602 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:23:07,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 05:23:07,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:23:07,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:23:07,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:23:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash -298858769, now seen corresponding path program 3 times [2023-08-27 05:23:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:23:07,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341414659] [2023-08-27 05:23:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:23:07,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:23:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:23:07,836 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:23:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:23:07,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:23:07,872 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:23:07,874 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:23:07,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 05:23:07,874 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-27 05:23:07,875 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:23:07,875 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:23:07,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 05:23:07,913 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 05:23:07,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 393 transitions, 816 flow [2023-08-27 05:23:08,021 INFO L124 PetriNetUnfolderBase]: 117/760 cut-off events. [2023-08-27 05:23:08,021 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-27 05:23:08,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 760 events. 117/760 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3593 event pairs, 1 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 524. Up to 16 conditions per place. [2023-08-27 05:23:08,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 393 transitions, 816 flow [2023-08-27 05:23:08,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 391 transitions, 812 flow [2023-08-27 05:23:08,044 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:23:08,044 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 391 transitions, 812 flow [2023-08-27 05:23:08,044 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 391 transitions, 812 flow [2023-08-27 05:23:08,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 391 transitions, 812 flow [2023-08-27 05:23:08,139 INFO L124 PetriNetUnfolderBase]: 117/758 cut-off events. [2023-08-27 05:23:08,139 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-27 05:23:08,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 758 events. 117/758 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3595 event pairs, 1 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 522. Up to 16 conditions per place. [2023-08-27 05:23:08,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 88800 [2023-08-27 05:23:12,793 INFO L134 LiptonReduction]: Checked pairs total: 159047 [2023-08-27 05:23:12,793 INFO L136 LiptonReduction]: Total number of compositions: 351 [2023-08-27 05:23:12,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:23:12,795 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;@167a4690, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:23:12,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:23:12,808 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:23:12,808 INFO L124 PetriNetUnfolderBase]: 60/205 cut-off events. [2023-08-27 05:23:12,808 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 05:23:12,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:23:12,808 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-27 05:23:12,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:23:12,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:23:12,809 INFO L85 PathProgramCache]: Analyzing trace with hash -625160919, now seen corresponding path program 1 times [2023-08-27 05:23:12,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:23:12,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793577142] [2023-08-27 05:23:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:23:12,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:23:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:23:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:23:12,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:23:12,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793577142] [2023-08-27 05:23:12,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793577142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:23:12,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:23:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:23:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910931751] [2023-08-27 05:23:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:23:12,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:23:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:23:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:23:12,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:23:12,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 744 [2023-08-27 05:23:12,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 151 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 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) [2023-08-27 05:23:12,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:23:12,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 744 [2023-08-27 05:23:12,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:24:11,742 INFO L124 PetriNetUnfolderBase]: 692667/943955 cut-off events. [2023-08-27 05:24:11,742 INFO L125 PetriNetUnfolderBase]: For 5642/5642 co-relation queries the response was YES. [2023-08-27 05:24:13,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861766 conditions, 943955 events. 692667/943955 cut-off events. For 5642/5642 co-relation queries the response was YES. Maximal size of possible extension queue 24638. Compared 7686842 event pairs, 669997 based on Foata normal form. 113352/753374 useless extension candidates. Maximal degree in co-relation 359767. Up to 914553 conditions per place. [2023-08-27 05:24:14,453 INFO L140 encePairwiseOnDemand]: 699/744 looper letters, 68 selfloop transitions, 2 changer transitions 30/110 dead transitions. [2023-08-27 05:24:14,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 110 transitions, 444 flow [2023-08-27 05:24:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 05:24:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 05:24:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1100 transitions. [2023-08-27 05:24:14,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492831541218638 [2023-08-27 05:24:14,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1100 transitions. [2023-08-27 05:24:14,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1100 transitions. [2023-08-27 05:24:14,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:24:14,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1100 transitions. [2023-08-27 05:24:14,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 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) [2023-08-27 05:24:14,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 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) [2023-08-27 05:24:14,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 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) [2023-08-27 05:24:14,478 INFO L175 Difference]: Start difference. First operand has 108 places, 151 transitions, 332 flow. Second operand 3 states and 1100 transitions. [2023-08-27 05:24:14,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 110 transitions, 444 flow [2023-08-27 05:24:14,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 05:24:14,492 INFO L231 Difference]: Finished difference. Result has 111 places, 80 transitions, 191 flow [2023-08-27 05:24:14,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=111, PETRI_TRANSITIONS=80} [2023-08-27 05:24:14,493 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-08-27 05:24:14,493 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 80 transitions, 191 flow [2023-08-27 05:24:14,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 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) [2023-08-27 05:24:14,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:24:14,494 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:24:14,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 05:24:14,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:24:14,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:24:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash 258034013, now seen corresponding path program 1 times [2023-08-27 05:24:14,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:24:14,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433136604] [2023-08-27 05:24:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:24:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:24:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:24:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:24:14,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:24:14,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433136604] [2023-08-27 05:24:14,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433136604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:24:14,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371351183] [2023-08-27 05:24:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:24:14,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:24:14,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:24:14,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 05:24:14,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 05:24:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:24:14,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 05:24:14,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:24:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:24:14,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:24:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:24:14,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371351183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:24:14,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:24:14,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 05:24:14,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353875312] [2023-08-27 05:24:14,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:24:14,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 05:24:14,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:24:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 05:24:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 05:24:14,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 744 [2023-08-27 05:24:14,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 80 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 321.85714285714283) internal successors, (2253), 7 states have internal predecessors, (2253), 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) [2023-08-27 05:24:14,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:24:14,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 744 [2023-08-27 05:24:14,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:24:26,179 INFO L124 PetriNetUnfolderBase]: 144521/198779 cut-off events. [2023-08-27 05:24:26,179 INFO L125 PetriNetUnfolderBase]: For 2656/2656 co-relation queries the response was YES. [2023-08-27 05:24:26,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393140 conditions, 198779 events. 144521/198779 cut-off events. For 2656/2656 co-relation queries the response was YES. Maximal size of possible extension queue 6953. Compared 1499484 event pairs, 139666 based on Foata normal form. 0/126017 useless extension candidates. Maximal degree in co-relation 393126. Up to 192454 conditions per place. [2023-08-27 05:24:27,112 INFO L140 encePairwiseOnDemand]: 741/744 looper letters, 68 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-08-27 05:24:27,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 83 transitions, 349 flow [2023-08-27 05:24:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 05:24:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 05:24:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1996 transitions. [2023-08-27 05:24:27,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44713261648745517 [2023-08-27 05:24:27,117 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1996 transitions. [2023-08-27 05:24:27,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1996 transitions. [2023-08-27 05:24:27,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:24:27,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1996 transitions. [2023-08-27 05:24:27,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 332.6666666666667) internal successors, (1996), 6 states have internal predecessors, (1996), 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) [2023-08-27 05:24:27,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 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) [2023-08-27 05:24:27,129 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 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) [2023-08-27 05:24:27,129 INFO L175 Difference]: Start difference. First operand has 111 places, 80 transitions, 191 flow. Second operand 6 states and 1996 transitions. [2023-08-27 05:24:27,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 83 transitions, 349 flow [2023-08-27 05:24:27,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 339 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 05:24:27,136 INFO L231 Difference]: Finished difference. Result has 92 places, 83 transitions, 217 flow [2023-08-27 05:24:27,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=217, PETRI_PLACES=92, PETRI_TRANSITIONS=83} [2023-08-27 05:24:27,138 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -16 predicate places. [2023-08-27 05:24:27,138 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 83 transitions, 217 flow [2023-08-27 05:24:27,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 321.85714285714283) internal successors, (2253), 7 states have internal predecessors, (2253), 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) [2023-08-27 05:24:27,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:24:27,139 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-27 05:24:27,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 05:24:27,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-27 05:24:27,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:24:27,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:24:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash 504642089, now seen corresponding path program 2 times [2023-08-27 05:24:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:24:27,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344289849] [2023-08-27 05:24:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:24:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:24:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:24:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:24:27,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:24:27,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344289849] [2023-08-27 05:24:27,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344289849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:24:27,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351526994] [2023-08-27 05:24:27,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 05:24:27,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:24:27,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:24:27,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 05:24:27,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 05:24:27,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 05:24:27,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 05:24:27,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 05:24:27,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:24:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:24:27,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:24:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:24:27,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351526994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:24:27,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:24:27,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 05:24:27,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689543372] [2023-08-27 05:24:27,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:24:27,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 05:24:27,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:24:27,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 05:24:27,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 05:24:27,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 744 [2023-08-27 05:24:27,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 83 transitions, 217 flow. Second operand has 13 states, 13 states have (on average 321.46153846153845) internal successors, (4179), 13 states have internal predecessors, (4179), 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) [2023-08-27 05:24:27,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:24:27,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 744 [2023-08-27 05:24:27,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:24:40,488 INFO L124 PetriNetUnfolderBase]: 144521/198785 cut-off events. [2023-08-27 05:24:40,488 INFO L125 PetriNetUnfolderBase]: For 1254/1254 co-relation queries the response was YES. [2023-08-27 05:24:41,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392622 conditions, 198785 events. 144521/198785 cut-off events. For 1254/1254 co-relation queries the response was YES. Maximal size of possible extension queue 6963. Compared 1499520 event pairs, 139666 based on Foata normal form. 6/126030 useless extension candidates. Maximal degree in co-relation 392562. Up to 192454 conditions per place. [2023-08-27 05:24:41,567 INFO L140 encePairwiseOnDemand]: 741/744 looper letters, 68 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2023-08-27 05:24:41,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 89 transitions, 411 flow [2023-08-27 05:24:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 05:24:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 05:24:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3925 transitions. [2023-08-27 05:24:41,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43962813620071683 [2023-08-27 05:24:41,576 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3925 transitions. [2023-08-27 05:24:41,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3925 transitions. [2023-08-27 05:24:41,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:24:41,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3925 transitions. [2023-08-27 05:24:41,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 327.0833333333333) internal successors, (3925), 12 states have internal predecessors, (3925), 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) [2023-08-27 05:24:41,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 744.0) internal successors, (9672), 13 states have internal predecessors, (9672), 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) [2023-08-27 05:24:41,597 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 744.0) internal successors, (9672), 13 states have internal predecessors, (9672), 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) [2023-08-27 05:24:41,597 INFO L175 Difference]: Start difference. First operand has 92 places, 83 transitions, 217 flow. Second operand 12 states and 3925 transitions. [2023-08-27 05:24:41,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 89 transitions, 411 flow [2023-08-27 05:24:41,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 89 transitions, 397 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 05:24:41,600 INFO L231 Difference]: Finished difference. Result has 108 places, 89 transitions, 287 flow [2023-08-27 05:24:41,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=287, PETRI_PLACES=108, PETRI_TRANSITIONS=89} [2023-08-27 05:24:41,600 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 0 predicate places. [2023-08-27 05:24:41,601 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 89 transitions, 287 flow [2023-08-27 05:24:41,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 321.46153846153845) internal successors, (4179), 13 states have internal predecessors, (4179), 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) [2023-08-27 05:24:41,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:24:41,602 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-27 05:24:41,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 05:24:41,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:24:41,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:24:41,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:24:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1741565353, now seen corresponding path program 3 times [2023-08-27 05:24:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:24:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464063898] [2023-08-27 05:24:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:24:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:24:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:24:41,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:24:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:24:41,853 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:24:41,854 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:24:41,854 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:24:41,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 05:24:41,854 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-27 05:24:41,856 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:24:41,856 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:24:41,856 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-27 05:24:41,896 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 05:24:41,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 406 places, 475 transitions, 994 flow [2023-08-27 05:24:42,072 INFO L124 PetriNetUnfolderBase]: 166/1088 cut-off events. [2023-08-27 05:24:42,072 INFO L125 PetriNetUnfolderBase]: For 48/49 co-relation queries the response was YES. [2023-08-27 05:24:42,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 1088 events. 166/1088 cut-off events. For 48/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5527 event pairs, 6 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 780. Up to 32 conditions per place. [2023-08-27 05:24:42,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 406 places, 475 transitions, 994 flow [2023-08-27 05:24:42,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 473 transitions, 990 flow [2023-08-27 05:24:42,103 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:24:42,103 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 404 places, 473 transitions, 990 flow [2023-08-27 05:24:42,103 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 404 places, 473 transitions, 990 flow [2023-08-27 05:24:42,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 404 places, 473 transitions, 990 flow [2023-08-27 05:24:42,223 INFO L124 PetriNetUnfolderBase]: 166/1086 cut-off events. [2023-08-27 05:24:42,223 INFO L125 PetriNetUnfolderBase]: For 48/49 co-relation queries the response was YES. [2023-08-27 05:24:42,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 1086 events. 166/1086 cut-off events. For 48/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5511 event pairs, 6 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 778. Up to 32 conditions per place. [2023-08-27 05:24:42,307 INFO L119 LiptonReduction]: Number of co-enabled transitions 144960 [2023-08-27 05:24:47,661 INFO L134 LiptonReduction]: Checked pairs total: 297454 [2023-08-27 05:24:47,661 INFO L136 LiptonReduction]: Total number of compositions: 436 [2023-08-27 05:24:47,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:24:47,663 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;@167a4690, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:24:47,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:24:47,683 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:24:47,683 INFO L124 PetriNetUnfolderBase]: 82/284 cut-off events. [2023-08-27 05:24:47,683 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-27 05:24:47,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:24:47,683 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:24:47,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:24:47,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:24:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1942299420, now seen corresponding path program 1 times [2023-08-27 05:24:47,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:24:47,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76139658] [2023-08-27 05:24:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:24:47,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:24:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:24:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-27 05:24:47,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:24:47,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76139658] [2023-08-27 05:24:47,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76139658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:24:47,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:24:47,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:24:47,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208346919] [2023-08-27 05:24:47,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:24:47,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:24:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:24:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:24:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:24:47,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 386 out of 911 [2023-08-27 05:24:47,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 185 transitions, 414 flow. Second operand has 3 states, 3 states have (on average 388.6666666666667) internal successors, (1166), 3 states have internal predecessors, (1166), 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) [2023-08-27 05:24:47,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:24:47,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 386 of 911 [2023-08-27 05:24:47,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand