/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/pthread-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 04:03:49,205 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 04:03:49,286 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 04:03:49,291 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 04:03:49,291 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 04:03:49,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 04:03:49,322 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 04:03:49,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 04:03:49,323 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 04:03:49,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 04:03:49,327 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 04:03:49,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 04:03:49,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 04:03:49,329 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 04:03:49,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 04:03:49,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 04:03:49,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 04:03:49,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 04:03:49,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 04:03:49,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 04:03:49,330 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 04:03:49,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 04:03:49,332 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 04:03:49,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 04:03:49,332 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 04:03:49,333 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 04:03:49,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 04:03:49,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 04:03:49,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 04:03:49,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 04:03:49,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 04:03:49,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 04:03:49,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 04:03:49,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 04:03:49,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 04:03:49,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 04:03:49,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 04:03:49,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 04:03:49,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 04:03:49,709 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 04:03:49,709 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 04:03:49,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-27 04:03:50,902 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 04:03:51,248 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 04:03:51,249 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-08-27 04:03:51,268 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c1c847c/40d5518a729e48fa8fd76ab2cb0e0307/FLAG1e8a5cad2 [2023-08-27 04:03:51,284 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c1c847c/40d5518a729e48fa8fd76ab2cb0e0307 [2023-08-27 04:03:51,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 04:03:51,291 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 04:03:51,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 04:03:51,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 04:03:51,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 04:03:51,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:03:51" (1/1) ... [2023-08-27 04:03:51,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e67747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:51, skipping insertion in model container [2023-08-27 04:03:51,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:03:51" (1/1) ... [2023-08-27 04:03:51,360 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 04:03:51,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 04:03:51,959 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 04:03:51,982 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [127] [2023-08-27 04:03:51,992 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [573] [2023-08-27 04:03:51,993 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [574] [2023-08-27 04:03:52,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 04:03:52,121 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 04:03:52,121 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 04:03:52,127 INFO L206 MainTranslator]: Completed translation [2023-08-27 04:03:52,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52 WrapperNode [2023-08-27 04:03:52,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 04:03:52,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 04:03:52,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 04:03:52,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 04:03:52,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,206 INFO L138 Inliner]: procedures = 481, calls = 75, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 305 [2023-08-27 04:03:52,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 04:03:52,207 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 04:03:52,207 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 04:03:52,207 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 04:03:52,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,222 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,222 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,261 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,288 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 04:03:52,289 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 04:03:52,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 04:03:52,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 04:03:52,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (1/1) ... [2023-08-27 04:03:52,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 04:03:52,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 04:03:52,324 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 04:03:52,326 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 04:03:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 04:03:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 04:03:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 04:03:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 04:03:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 04:03:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-08-27 04:03:52,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-08-27 04:03:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 04:03:52,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 04:03:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 04:03:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 04:03:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 04:03:52,355 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 04:03:52,577 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 04:03:52,578 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 04:03:52,922 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 04:03:53,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 04:03:53,013 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-27 04:03:53,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:03:53 BoogieIcfgContainer [2023-08-27 04:03:53,017 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 04:03:53,019 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 04:03:53,019 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 04:03:53,022 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 04:03:53,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:03:51" (1/3) ... [2023-08-27 04:03:53,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24836753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:03:53, skipping insertion in model container [2023-08-27 04:03:53,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:03:52" (2/3) ... [2023-08-27 04:03:53,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24836753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:03:53, skipping insertion in model container [2023-08-27 04:03:53,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:03:53" (3/3) ... [2023-08-27 04:03:53,025 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-08-27 04:03:53,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 04:03:53,042 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-27 04:03:53,042 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 04:03:53,157 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-27 04:03:53,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 283 transitions, 574 flow [2023-08-27 04:03:53,306 INFO L124 PetriNetUnfolderBase]: 20/297 cut-off events. [2023-08-27 04:03:53,306 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 04:03:53,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 297 events. 20/297 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 557 event pairs, 0 based on Foata normal form. 0/257 useless extension candidates. Maximal degree in co-relation 197. Up to 4 conditions per place. [2023-08-27 04:03:53,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 283 transitions, 574 flow [2023-08-27 04:03:53,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 266 transitions, 537 flow [2023-08-27 04:03:53,337 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 04:03:53,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 266 transitions, 537 flow [2023-08-27 04:03:53,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 266 transitions, 537 flow [2023-08-27 04:03:53,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 266 transitions, 537 flow [2023-08-27 04:03:53,434 INFO L124 PetriNetUnfolderBase]: 19/280 cut-off events. [2023-08-27 04:03:53,435 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 04:03:53,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 280 events. 19/280 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 464 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 197. Up to 4 conditions per place. [2023-08-27 04:03:53,445 INFO L119 LiptonReduction]: Number of co-enabled transitions 8352 [2023-08-27 04:04:01,398 INFO L134 LiptonReduction]: Checked pairs total: 9091 [2023-08-27 04:04:01,399 INFO L136 LiptonReduction]: Total number of compositions: 278 [2023-08-27 04:04:01,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 04:04:01,415 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;@59224c00, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 04:04:01,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 04:04:01,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 04:04:01,419 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-08-27 04:04:01,419 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 04:04:01,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:04:01,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-27 04:04:01,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:04:01,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:04:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1167132427, now seen corresponding path program 1 times [2023-08-27 04:04:01,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:04:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153230692] [2023-08-27 04:04:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:04:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:04:01,865 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 04:04:01,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:04:01,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153230692] [2023-08-27 04:04:01,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153230692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 04:04:01,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 04:04:01,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 04:04:01,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293631916] [2023-08-27 04:04:01,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 04:04:01,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 04:04:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:04:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 04:04:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 04:04:01,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 561 [2023-08-27 04:04:01,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 43 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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 04:04:01,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:04:01,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 561 [2023-08-27 04:04:01,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 04:04:02,037 INFO L124 PetriNetUnfolderBase]: 152/302 cut-off events. [2023-08-27 04:04:02,037 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 04:04:02,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 302 events. 152/302 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1020 event pairs, 115 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 588. Up to 301 conditions per place. [2023-08-27 04:04:02,040 INFO L140 encePairwiseOnDemand]: 554/561 looper letters, 34 selfloop transitions, 2 changer transitions 3/40 dead transitions. [2023-08-27 04:04:02,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 163 flow [2023-08-27 04:04:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 04:04:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 04:04:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-08-27 04:04:02,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44860368389780153 [2023-08-27 04:04:02,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-08-27 04:04:02,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-08-27 04:04:02,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 04:04:02,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-08-27 04:04:02,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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 04:04:02,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 561.0) internal successors, (2244), 4 states have internal predecessors, (2244), 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 04:04:02,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 561.0) internal successors, (2244), 4 states have internal predecessors, (2244), 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 04:04:02,077 INFO L175 Difference]: Start difference. First operand has 36 places, 43 transitions, 91 flow. Second operand 3 states and 755 transitions. [2023-08-27 04:04:02,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 163 flow [2023-08-27 04:04:02,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 163 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 04:04:02,082 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 89 flow [2023-08-27 04:04:02,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=561, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2023-08-27 04:04:02,086 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-27 04:04:02,086 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 89 flow [2023-08-27 04:04:02,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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 04:04:02,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:04:02,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 04:04:02,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 04:04:02,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:04:02,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:04:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -473971966, now seen corresponding path program 1 times [2023-08-27 04:04:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:04:02,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708361063] [2023-08-27 04:04:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:04:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:04:02,276 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 04:04:02,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:04:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708361063] [2023-08-27 04:04:02,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708361063] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 04:04:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511518340] [2023-08-27 04:04:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:02,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 04:04:02,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 04:04:02,281 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 04:04:02,312 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 04:04:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:04:02,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 04:04:02,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 04:04:02,474 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 04:04:02,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 04:04:02,494 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 04:04:02,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511518340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 04:04:02,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 04:04:02,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-27 04:04:02,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956994556] [2023-08-27 04:04:02,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 04:04:02,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 04:04:02,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:04:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 04:04:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-27 04:04:02,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 561 [2023-08-27 04:04:02,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 238.5) internal successors, (1908), 8 states have internal predecessors, (1908), 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 04:04:02,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:04:02,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 561 [2023-08-27 04:04:02,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 04:04:02,625 INFO L124 PetriNetUnfolderBase]: 65/143 cut-off events. [2023-08-27 04:04:02,625 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 04:04:02,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 143 events. 65/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 356 event pairs, 46 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 287. Up to 141 conditions per place. [2023-08-27 04:04:02,626 INFO L140 encePairwiseOnDemand]: 558/561 looper letters, 34 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2023-08-27 04:04:02,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 167 flow [2023-08-27 04:04:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 04:04:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 04:04:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 986 transitions. [2023-08-27 04:04:02,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2023-08-27 04:04:02,630 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 986 transitions. [2023-08-27 04:04:02,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 986 transitions. [2023-08-27 04:04:02,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 04:04:02,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 986 transitions. [2023-08-27 04:04:02,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 246.5) internal successors, (986), 4 states have internal predecessors, (986), 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 04:04:02,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 561.0) internal successors, (2805), 5 states have internal predecessors, (2805), 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 04:04:02,639 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 561.0) internal successors, (2805), 5 states have internal predecessors, (2805), 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 04:04:02,639 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 89 flow. Second operand 4 states and 986 transitions. [2023-08-27 04:04:02,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 167 flow [2023-08-27 04:04:02,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 163 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 04:04:02,641 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 101 flow [2023-08-27 04:04:02,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=561, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-27 04:04:02,642 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-27 04:04:02,642 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 101 flow [2023-08-27 04:04:02,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 238.5) internal successors, (1908), 8 states have internal predecessors, (1908), 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 04:04:02,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:04:02,643 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-27 04:04:02,657 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 04:04:02,850 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 04:04:02,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:04:02,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:04:02,851 INFO L85 PathProgramCache]: Analyzing trace with hash -460834155, now seen corresponding path program 2 times [2023-08-27 04:04:02,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:04:02,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263825393] [2023-08-27 04:04:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:02,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:04:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 04:04:02,909 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 04:04:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 04:04:02,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 04:04:02,968 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 04:04:02,969 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 04:04:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 04:04:02,971 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-27 04:04:02,974 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 04:04:02,974 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 04:04:02,975 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 04:04:03,067 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 04:04:03,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 432 places, 459 transitions, 936 flow [2023-08-27 04:04:03,201 INFO L124 PetriNetUnfolderBase]: 38/521 cut-off events. [2023-08-27 04:04:03,201 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 04:04:03,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 521 events. 38/521 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1725 event pairs, 0 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 388. Up to 8 conditions per place. [2023-08-27 04:04:03,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 432 places, 459 transitions, 936 flow [2023-08-27 04:04:03,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 424 places, 451 transitions, 920 flow [2023-08-27 04:04:03,215 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 04:04:03,215 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 424 places, 451 transitions, 920 flow [2023-08-27 04:04:03,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 424 places, 451 transitions, 920 flow [2023-08-27 04:04:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 424 places, 451 transitions, 920 flow [2023-08-27 04:04:03,303 INFO L124 PetriNetUnfolderBase]: 38/513 cut-off events. [2023-08-27 04:04:03,303 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 04:04:03,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 513 events. 38/513 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1697 event pairs, 0 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 388. Up to 8 conditions per place. [2023-08-27 04:04:03,348 INFO L119 LiptonReduction]: Number of co-enabled transitions 83868 [2023-08-27 04:04:13,741 INFO L134 LiptonReduction]: Checked pairs total: 94255 [2023-08-27 04:04:13,742 INFO L136 LiptonReduction]: Total number of compositions: 446 [2023-08-27 04:04:13,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 04:04:13,754 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;@59224c00, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 04:04:13,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 04:04:13,759 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 04:04:13,760 INFO L124 PetriNetUnfolderBase]: 6/52 cut-off events. [2023-08-27 04:04:13,760 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 04:04:13,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:04:13,760 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 04:04:13,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:04:13,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:04:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1333056587, now seen corresponding path program 1 times [2023-08-27 04:04:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:04:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435340012] [2023-08-27 04:04:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:04:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:04:13,862 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 04:04:13,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:04:13,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435340012] [2023-08-27 04:04:13,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435340012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 04:04:13,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 04:04:13,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 04:04:13,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486148595] [2023-08-27 04:04:13,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 04:04:13,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 04:04:13,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:04:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 04:04:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 04:04:13,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 393 out of 905 [2023-08-27 04:04:13,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 04:04:13,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:04:13,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 393 of 905 [2023-08-27 04:04:13,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 04:04:15,957 INFO L124 PetriNetUnfolderBase]: 15478/22719 cut-off events. [2023-08-27 04:04:15,958 INFO L125 PetriNetUnfolderBase]: For 246/246 co-relation queries the response was YES. [2023-08-27 04:04:15,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45532 conditions, 22719 events. 15478/22719 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 139991 event pairs, 12572 based on Foata normal form. 0/13878 useless extension candidates. Maximal degree in co-relation 38006. Up to 22650 conditions per place. [2023-08-27 04:04:16,035 INFO L140 encePairwiseOnDemand]: 896/905 looper letters, 74 selfloop transitions, 2 changer transitions 11/89 dead transitions. [2023-08-27 04:04:16,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 89 transitions, 366 flow [2023-08-27 04:04:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 04:04:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 04:04:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1271 transitions. [2023-08-27 04:04:16,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681399631675875 [2023-08-27 04:04:16,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1271 transitions. [2023-08-27 04:04:16,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1271 transitions. [2023-08-27 04:04:16,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 04:04:16,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1271 transitions. [2023-08-27 04:04:16,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 423.6666666666667) internal successors, (1271), 3 states have internal predecessors, (1271), 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 04:04:16,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 905.0) internal successors, (3620), 4 states have internal predecessors, (3620), 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 04:04:16,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 905.0) internal successors, (3620), 4 states have internal predecessors, (3620), 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 04:04:16,051 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 206 flow. Second operand 3 states and 1271 transitions. [2023-08-27 04:04:16,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 89 transitions, 366 flow [2023-08-27 04:04:16,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 89 transitions, 366 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 04:04:16,054 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 178 flow [2023-08-27 04:04:16,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=905, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2023-08-27 04:04:16,055 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-08-27 04:04:16,055 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 178 flow [2023-08-27 04:04:16,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 04:04:16,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:04:16,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 04:04:16,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 04:04:16,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:04:16,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:04:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash -266972324, now seen corresponding path program 1 times [2023-08-27 04:04:16,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:04:16,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071579017] [2023-08-27 04:04:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:16,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:04:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:04:16,181 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 04:04:16,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:04:16,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071579017] [2023-08-27 04:04:16,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071579017] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 04:04:16,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086418130] [2023-08-27 04:04:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:16,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 04:04:16,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 04:04:16,184 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 04:04:16,189 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 04:04:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:04:16,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 04:04:16,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 04:04:16,378 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 04:04:16,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 04:04:16,403 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 04:04:16,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086418130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 04:04:16,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 04:04:16,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-27 04:04:16,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673846791] [2023-08-27 04:04:16,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 04:04:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 04:04:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:04:16,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 04:04:16,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-27 04:04:16,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 393 out of 905 [2023-08-27 04:04:16,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 178 flow. Second operand has 8 states, 8 states have (on average 394.625) internal successors, (3157), 8 states have internal predecessors, (3157), 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 04:04:16,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:04:16,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 393 of 905 [2023-08-27 04:04:16,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 04:04:17,304 INFO L124 PetriNetUnfolderBase]: 5179/7805 cut-off events. [2023-08-27 04:04:17,305 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-27 04:04:17,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15710 conditions, 7805 events. 5179/7805 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 42251 event pairs, 4116 based on Foata normal form. 0/5857 useless extension candidates. Maximal degree in co-relation 15697. Up to 7793 conditions per place. [2023-08-27 04:04:17,346 INFO L140 encePairwiseOnDemand]: 902/905 looper letters, 74 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-08-27 04:04:17,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 336 flow [2023-08-27 04:04:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 04:04:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 04:04:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1650 transitions. [2023-08-27 04:04:17,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558011049723757 [2023-08-27 04:04:17,351 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1650 transitions. [2023-08-27 04:04:17,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1650 transitions. [2023-08-27 04:04:17,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 04:04:17,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1650 transitions. [2023-08-27 04:04:17,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 412.5) internal successors, (1650), 4 states have internal predecessors, (1650), 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 04:04:17,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 905.0) internal successors, (4525), 5 states have internal predecessors, (4525), 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 04:04:17,363 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 905.0) internal successors, (4525), 5 states have internal predecessors, (4525), 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 04:04:17,363 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 178 flow. Second operand 4 states and 1650 transitions. [2023-08-27 04:04:17,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 336 flow [2023-08-27 04:04:17,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 330 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 04:04:17,367 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 188 flow [2023-08-27 04:04:17,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=905, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-08-27 04:04:17,368 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-08-27 04:04:17,369 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 188 flow [2023-08-27 04:04:17,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 394.625) internal successors, (3157), 8 states have internal predecessors, (3157), 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 04:04:17,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:04:17,371 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 04:04:17,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-27 04:04:17,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 04:04:17,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:04:17,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:04:17,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1578098539, now seen corresponding path program 2 times [2023-08-27 04:04:17,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:04:17,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656068392] [2023-08-27 04:04:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:04:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 04:04:17,608 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 04:04:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 04:04:17,648 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 04:04:17,648 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 04:04:17,648 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 04:04:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 04:04:17,649 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-27 04:04:17,649 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 04:04:17,649 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 04:04:17,649 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 04:04:17,727 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 04:04:17,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 596 places, 635 transitions, 1300 flow [2023-08-27 04:04:17,910 INFO L124 PetriNetUnfolderBase]: 61/780 cut-off events. [2023-08-27 04:04:17,910 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 04:04:17,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 780 events. 61/780 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3459 event pairs, 1 based on Foata normal form. 0/672 useless extension candidates. Maximal degree in co-relation 598. Up to 16 conditions per place. [2023-08-27 04:04:17,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 596 places, 635 transitions, 1300 flow [2023-08-27 04:04:17,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 588 places, 627 transitions, 1284 flow [2023-08-27 04:04:17,938 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 04:04:17,938 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 588 places, 627 transitions, 1284 flow [2023-08-27 04:04:17,939 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 588 places, 627 transitions, 1284 flow [2023-08-27 04:04:17,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 588 places, 627 transitions, 1284 flow [2023-08-27 04:04:18,105 INFO L124 PetriNetUnfolderBase]: 61/772 cut-off events. [2023-08-27 04:04:18,105 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 04:04:18,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 772 events. 61/772 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3426 event pairs, 1 based on Foata normal form. 0/672 useless extension candidates. Maximal degree in co-relation 598. Up to 16 conditions per place. [2023-08-27 04:04:18,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 218196 [2023-08-27 04:04:31,375 INFO L134 LiptonReduction]: Checked pairs total: 259174 [2023-08-27 04:04:31,375 INFO L136 LiptonReduction]: Total number of compositions: 624 [2023-08-27 04:04:31,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 04:04:31,377 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;@59224c00, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 04:04:31,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 04:04:31,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 04:04:31,385 INFO L124 PetriNetUnfolderBase]: 18/109 cut-off events. [2023-08-27 04:04:31,385 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 04:04:31,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:04:31,385 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-27 04:04:31,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:04:31,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:04:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash -861184086, now seen corresponding path program 1 times [2023-08-27 04:04:31,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:04:31,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186746063] [2023-08-27 04:04:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:04:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:04:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:04:31,453 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 04:04:31,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:04:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186746063] [2023-08-27 04:04:31,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186746063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 04:04:31,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 04:04:31,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 04:04:31,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472579690] [2023-08-27 04:04:31,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 04:04:31,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 04:04:31,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:04:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 04:04:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 04:04:31,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 549 out of 1259 [2023-08-27 04:04:31,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 551.3333333333334) internal successors, (1654), 3 states have internal predecessors, (1654), 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 04:04:31,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:04:31,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 549 of 1259 [2023-08-27 04:04:31,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 04:05:34,292 INFO L124 PetriNetUnfolderBase]: 748969/978007 cut-off events. [2023-08-27 04:05:34,292 INFO L125 PetriNetUnfolderBase]: For 13657/13657 co-relation queries the response was YES. [2023-08-27 04:05:35,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960823 conditions, 978007 events. 748969/978007 cut-off events. For 13657/13657 co-relation queries the response was YES. Maximal size of possible extension queue 18657. Compared 6868796 event pairs, 613995 based on Foata normal form. 14825/619723 useless extension candidates. Maximal degree in co-relation 476569. Up to 976073 conditions per place. [2023-08-27 04:05:36,976 INFO L140 encePairwiseOnDemand]: 1245/1259 looper letters, 111 selfloop transitions, 2 changer transitions 12/127 dead transitions. [2023-08-27 04:05:36,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 127 transitions, 530 flow [2023-08-27 04:05:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 04:05:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 04:05:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1782 transitions. [2023-08-27 04:05:36,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47180301826846704 [2023-08-27 04:05:36,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1782 transitions. [2023-08-27 04:05:36,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1782 transitions. [2023-08-27 04:05:36,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 04:05:36,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1782 transitions. [2023-08-27 04:05:36,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 594.0) internal successors, (1782), 3 states have internal predecessors, (1782), 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 04:05:36,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1259.0) internal successors, (5036), 4 states have internal predecessors, (5036), 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 04:05:36,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1259.0) internal successors, (5036), 4 states have internal predecessors, (5036), 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 04:05:36,997 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 304 flow. Second operand 3 states and 1782 transitions. [2023-08-27 04:05:36,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 127 transitions, 530 flow [2023-08-27 04:05:37,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 127 transitions, 530 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 04:05:37,227 INFO L231 Difference]: Finished difference. Result has 114 places, 115 transitions, 261 flow [2023-08-27 04:05:37,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1259, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=114, PETRI_TRANSITIONS=115} [2023-08-27 04:05:37,228 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, 3 predicate places. [2023-08-27 04:05:37,228 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 115 transitions, 261 flow [2023-08-27 04:05:37,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 551.3333333333334) internal successors, (1654), 3 states have internal predecessors, (1654), 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 04:05:37,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:05:37,229 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 04:05:37,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 04:05:37,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:05:37,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:05:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash 526668784, now seen corresponding path program 1 times [2023-08-27 04:05:37,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:05:37,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281316620] [2023-08-27 04:05:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:05:37,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:05:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:05:37,325 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 04:05:37,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:05:37,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281316620] [2023-08-27 04:05:37,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281316620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 04:05:37,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938970207] [2023-08-27 04:05:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:05:37,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 04:05:37,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 04:05:37,328 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 04:05:37,333 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 04:05:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:05:37,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 04:05:37,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 04:05:37,536 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 04:05:37,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 04:05:37,555 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 04:05:37,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938970207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 04:05:37,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 04:05:37,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 04:05:37,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007900924] [2023-08-27 04:05:37,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 04:05:37,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 04:05:37,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:05:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 04:05:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-27 04:05:37,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 549 out of 1259 [2023-08-27 04:05:37,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 550.8571428571429) internal successors, (3856), 7 states have internal predecessors, (3856), 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 04:05:37,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:05:37,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 549 of 1259 [2023-08-27 04:05:37,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 04:06:00,761 INFO L124 PetriNetUnfolderBase]: 254807/336058 cut-off events. [2023-08-27 04:06:00,761 INFO L125 PetriNetUnfolderBase]: For 5698/5698 co-relation queries the response was YES. [2023-08-27 04:06:01,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675890 conditions, 336058 events. 254807/336058 cut-off events. For 5698/5698 co-relation queries the response was YES. Maximal size of possible extension queue 6418. Compared 2162830 event pairs, 206188 based on Foata normal form. 0/241520 useless extension candidates. Maximal degree in co-relation 675876. Up to 335901 conditions per place. [2023-08-27 04:06:02,245 INFO L140 encePairwiseOnDemand]: 1256/1259 looper letters, 111 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2023-08-27 04:06:02,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 116 transitions, 493 flow [2023-08-27 04:06:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 04:06:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 04:06:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2311 transitions. [2023-08-27 04:06:02,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588959491660048 [2023-08-27 04:06:02,250 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2311 transitions. [2023-08-27 04:06:02,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2311 transitions. [2023-08-27 04:06:02,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 04:06:02,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2311 transitions. [2023-08-27 04:06:02,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 577.75) internal successors, (2311), 4 states have internal predecessors, (2311), 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 04:06:02,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1259.0) internal successors, (6295), 5 states have internal predecessors, (6295), 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 04:06:02,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1259.0) internal successors, (6295), 5 states have internal predecessors, (6295), 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 04:06:02,262 INFO L175 Difference]: Start difference. First operand has 114 places, 115 transitions, 261 flow. Second operand 4 states and 2311 transitions. [2023-08-27 04:06:02,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 116 transitions, 493 flow [2023-08-27 04:06:02,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 116 transitions, 483 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 04:06:02,267 INFO L231 Difference]: Finished difference. Result has 108 places, 116 transitions, 267 flow [2023-08-27 04:06:02,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1259, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=108, PETRI_TRANSITIONS=116} [2023-08-27 04:06:02,268 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -3 predicate places. [2023-08-27 04:06:02,268 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 116 transitions, 267 flow [2023-08-27 04:06:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 550.8571428571429) internal successors, (3856), 7 states have internal predecessors, (3856), 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 04:06:02,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:06:02,270 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 04:06:02,279 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 04:06:02,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 04:06:02,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:06:02,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:06:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash 600434794, now seen corresponding path program 2 times [2023-08-27 04:06:02,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:06:02,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103574264] [2023-08-27 04:06:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:06:02,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:06:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:06:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 04:06:02,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:06:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103574264] [2023-08-27 04:06:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103574264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 04:06:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552374457] [2023-08-27 04:06:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 04:06:02,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 04:06:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 04:06:02,593 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 04:06:02,597 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 04:06:02,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 04:06:02,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 04:06:02,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 04:06:02,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 04:06:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 04:06:02,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 04:06:02,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552374457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 04:06:02,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 04:06:02,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-08-27 04:06:02,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025068130] [2023-08-27 04:06:02,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 04:06:02,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 04:06:02,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:06:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 04:06:02,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-27 04:06:02,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 550 out of 1259 [2023-08-27 04:06:02,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 552.1666666666666) internal successors, (3313), 6 states have internal predecessors, (3313), 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 04:06:02,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:06:02,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 550 of 1259 [2023-08-27 04:06:02,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 04:06:16,423 INFO L124 PetriNetUnfolderBase]: 163307/219233 cut-off events. [2023-08-27 04:06:16,424 INFO L125 PetriNetUnfolderBase]: For 930/930 co-relation queries the response was YES. [2023-08-27 04:06:16,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440345 conditions, 219233 events. 163307/219233 cut-off events. For 930/930 co-relation queries the response was YES. Maximal size of possible extension queue 4796. Compared 1395189 event pairs, 0 based on Foata normal form. 26100/181575 useless extension candidates. Maximal degree in co-relation 440325. Up to 117600 conditions per place. [2023-08-27 04:06:16,889 INFO L140 encePairwiseOnDemand]: 1256/1259 looper letters, 0 selfloop transitions, 0 changer transitions 328/328 dead transitions. [2023-08-27 04:06:16,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 328 transitions, 1343 flow [2023-08-27 04:06:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 04:06:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 04:06:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3626 transitions. [2023-08-27 04:06:16,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4800105904156738 [2023-08-27 04:06:16,896 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3626 transitions. [2023-08-27 04:06:16,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3626 transitions. [2023-08-27 04:06:16,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 04:06:16,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3626 transitions. [2023-08-27 04:06:16,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 604.3333333333334) internal successors, (3626), 6 states have internal predecessors, (3626), 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 04:06:16,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1259.0) internal successors, (8813), 7 states have internal predecessors, (8813), 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 04:06:16,912 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1259.0) internal successors, (8813), 7 states have internal predecessors, (8813), 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 04:06:16,912 INFO L175 Difference]: Start difference. First operand has 108 places, 116 transitions, 267 flow. Second operand 6 states and 3626 transitions. [2023-08-27 04:06:16,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 328 transitions, 1343 flow [2023-08-27 04:06:17,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 328 transitions, 1334 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 04:06:17,029 INFO L231 Difference]: Finished difference. Result has 109 places, 0 transitions, 0 flow [2023-08-27 04:06:17,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1259, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=109, PETRI_TRANSITIONS=0} [2023-08-27 04:06:17,030 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -2 predicate places. [2023-08-27 04:06:17,030 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 0 transitions, 0 flow [2023-08-27 04:06:17,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 552.1666666666666) internal successors, (3313), 6 states have internal predecessors, (3313), 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 04:06:17,031 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 04:06:17,036 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 04:06:17,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 04:06:17,232 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-27 04:06:17,232 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-27 04:06:17,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 596 places, 635 transitions, 1300 flow [2023-08-27 04:06:17,361 INFO L124 PetriNetUnfolderBase]: 61/780 cut-off events. [2023-08-27 04:06:17,362 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 04:06:17,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 780 events. 61/780 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3459 event pairs, 1 based on Foata normal form. 0/672 useless extension candidates. Maximal degree in co-relation 598. Up to 16 conditions per place. [2023-08-27 04:06:17,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 596 places, 635 transitions, 1300 flow [2023-08-27 04:06:17,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 596 places, 635 transitions, 1300 flow [2023-08-27 04:06:17,376 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 04:06:17,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 596 places, 635 transitions, 1300 flow [2023-08-27 04:06:17,377 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 596 places, 635 transitions, 1300 flow [2023-08-27 04:06:17,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 596 places, 635 transitions, 1300 flow [2023-08-27 04:06:17,478 INFO L124 PetriNetUnfolderBase]: 61/780 cut-off events. [2023-08-27 04:06:17,479 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 04:06:17,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 780 events. 61/780 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3459 event pairs, 1 based on Foata normal form. 0/672 useless extension candidates. Maximal degree in co-relation 598. Up to 16 conditions per place. [2023-08-27 04:06:17,533 INFO L119 LiptonReduction]: Number of co-enabled transitions 218196 [2023-08-27 04:06:31,002 INFO L134 LiptonReduction]: Checked pairs total: 256513 [2023-08-27 04:06:31,002 INFO L136 LiptonReduction]: Total number of compositions: 636 [2023-08-27 04:06:31,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 04:06:31,004 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;@59224c00, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 04:06:31,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-27 04:06:31,005 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 04:06:31,005 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 04:06:31,005 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 04:06:31,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:06:31,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 04:06:31,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 29 more)] === [2023-08-27 04:06:31,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:06:31,006 INFO L85 PathProgramCache]: Analyzing trace with hash 139056, now seen corresponding path program 1 times [2023-08-27 04:06:31,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:06:31,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516522603] [2023-08-27 04:06:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:06:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:06:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:06:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 04:06:31,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:06:31,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516522603] [2023-08-27 04:06:31,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516522603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 04:06:31,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 04:06:31,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 04:06:31,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065759534] [2023-08-27 04:06:31,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 04:06:31,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 04:06:31,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:06:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 04:06:31,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 04:06:31,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 558 out of 1271 [2023-08-27 04:06:31,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 3 states have internal predecessors, (1676), 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 04:06:31,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:06:31,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 558 of 1271 [2023-08-27 04:06:31,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand