/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 09:48:58,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 09:48:58,400 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 09:48:58,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 09:48:58,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 09:48:58,444 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 09:48:58,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 09:48:58,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 09:48:58,446 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 09:48:58,450 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 09:48:58,450 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 09:48:58,450 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 09:48:58,451 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 09:48:58,452 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 09:48:58,452 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 09:48:58,452 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 09:48:58,452 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 09:48:58,452 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 09:48:58,453 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 09:48:58,453 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 09:48:58,453 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 09:48:58,454 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 09:48:58,454 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 09:48:58,454 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 09:48:58,455 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 09:48:58,455 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 09:48:58,455 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 09:48:58,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 09:48:58,456 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 09:48:58,456 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 09:48:58,457 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 09:48:58,457 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 09:48:58,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 09:48:58,457 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 09:48:58,457 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 09:48:58,458 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 09:48:58,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 09:48:58,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 09:48:58,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 09:48:58,777 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 09:48:58,778 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 09:48:58,779 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-27 09:48:59,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 09:49:00,250 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 09:49:00,251 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-27 09:49:00,264 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff019f663/50db44d628884b70bd1666f1fbbf8f4b/FLAGe0c6e6a89 [2023-08-27 09:49:00,275 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff019f663/50db44d628884b70bd1666f1fbbf8f4b [2023-08-27 09:49:00,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 09:49:00,278 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 09:49:00,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 09:49:00,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 09:49:00,281 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 09:49:00,282 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de38c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00, skipping insertion in model container [2023-08-27 09:49:00,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,331 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 09:49:00,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 09:49:00,647 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 09:49:00,675 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-27 09:49:00,677 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-27 09:49:00,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 09:49:00,732 INFO L206 MainTranslator]: Completed translation [2023-08-27 09:49:00,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00 WrapperNode [2023-08-27 09:49:00,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 09:49:00,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 09:49:00,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 09:49:00,734 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 09:49:00,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,795 INFO L138 Inliner]: procedures = 170, calls = 19, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 86 [2023-08-27 09:49:00,796 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 09:49:00,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 09:49:00,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 09:49:00,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 09:49:00,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,811 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,829 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,830 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,833 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 09:49:00,834 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 09:49:00,834 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 09:49:00,834 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 09:49:00,835 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (1/1) ... [2023-08-27 09:49:00,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 09:49:00,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:00,870 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 09:49:00,883 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 09:49:00,915 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-27 09:49:00,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-27 09:49:00,916 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-27 09:49:00,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-27 09:49:00,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 09:49:00,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 09:49:00,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 09:49:00,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 09:49:00,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 09:49:00,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 09:49:00,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 09:49:00,919 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 09:49:01,066 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 09:49:01,068 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 09:49:01,212 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 09:49:01,258 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 09:49:01,259 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 09:49:01,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:49:01 BoogieIcfgContainer [2023-08-27 09:49:01,261 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 09:49:01,263 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 09:49:01,263 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 09:49:01,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 09:49:01,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:49:00" (1/3) ... [2023-08-27 09:49:01,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a886f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:49:01, skipping insertion in model container [2023-08-27 09:49:01,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:00" (2/3) ... [2023-08-27 09:49:01,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a886f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:49:01, skipping insertion in model container [2023-08-27 09:49:01,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:49:01" (3/3) ... [2023-08-27 09:49:01,275 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-08-27 09:49:01,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 09:49:01,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 09:49:01,289 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 09:49:01,330 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-27 09:49:01,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 65 transitions, 140 flow [2023-08-27 09:49:01,433 INFO L124 PetriNetUnfolderBase]: 8/74 cut-off events. [2023-08-27 09:49:01,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:01,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 74 events. 8/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-27 09:49:01,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 65 transitions, 140 flow [2023-08-27 09:49:01,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 64 transitions, 136 flow [2023-08-27 09:49:01,450 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:01,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 64 transitions, 136 flow [2023-08-27 09:49:01,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 64 transitions, 136 flow [2023-08-27 09:49:01,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 64 transitions, 136 flow [2023-08-27 09:49:01,502 INFO L124 PetriNetUnfolderBase]: 8/74 cut-off events. [2023-08-27 09:49:01,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 74 events. 8/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-27 09:49:01,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 1264 [2023-08-27 09:49:02,829 INFO L134 LiptonReduction]: Checked pairs total: 2186 [2023-08-27 09:49:02,829 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-27 09:49:02,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:49:02,851 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:02,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-27 09:49:02,858 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:02,858 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-27 09:49:02,858 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:02,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:02,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 09:49:02,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:02,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:02,865 INFO L85 PathProgramCache]: Analyzing trace with hash 334357577, now seen corresponding path program 1 times [2023-08-27 09:49:02,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:02,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614533526] [2023-08-27 09:49:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:03,086 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 09:49:03,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:03,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614533526] [2023-08-27 09:49:03,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614533526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:03,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:03,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:49:03,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897252303] [2023-08-27 09:49:03,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:03,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:03,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:03,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:03,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 115 [2023-08-27 09:49:03,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 09:49:03,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:03,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 115 [2023-08-27 09:49:03,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:03,264 INFO L124 PetriNetUnfolderBase]: 213/358 cut-off events. [2023-08-27 09:49:03,264 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 09:49:03,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 358 events. 213/358 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1276 event pairs, 65 based on Foata normal form. 12/342 useless extension candidates. Maximal degree in co-relation 716. Up to 202 conditions per place. [2023-08-27 09:49:03,275 INFO L140 encePairwiseOnDemand]: 104/115 looper letters, 19 selfloop transitions, 4 changer transitions 1/27 dead transitions. [2023-08-27 09:49:03,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 27 transitions, 110 flow [2023-08-27 09:49:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:49:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:49:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-08-27 09:49:03,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753623188405797 [2023-08-27 09:49:03,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-08-27 09:49:03,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-08-27 09:49:03,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:03,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-08-27 09:49:03,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 09:49:03,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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 09:49:03,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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 09:49:03,297 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 56 flow. Second operand 3 states and 164 transitions. [2023-08-27 09:49:03,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 27 transitions, 110 flow [2023-08-27 09:49:03,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:49:03,301 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 71 flow [2023-08-27 09:49:03,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-08-27 09:49:03,305 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-08-27 09:49:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 71 flow [2023-08-27 09:49:03,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 09:49:03,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:03,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 09:49:03,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:03,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash -966078511, now seen corresponding path program 1 times [2023-08-27 09:49:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:03,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616053102] [2023-08-27 09:49:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:03,429 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 09:49:03,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:03,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616053102] [2023-08-27 09:49:03,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616053102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:03,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:03,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:49:03,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071578441] [2023-08-27 09:49:03,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:03,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:03,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:03,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 115 [2023-08-27 09:49:03,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 09:49:03,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:03,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 115 [2023-08-27 09:49:03,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:03,480 INFO L124 PetriNetUnfolderBase]: 51/126 cut-off events. [2023-08-27 09:49:03,481 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 09:49:03,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 126 events. 51/126 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 373 event pairs, 9 based on Foata normal form. 29/153 useless extension candidates. Maximal degree in co-relation 269. Up to 64 conditions per place. [2023-08-27 09:49:03,482 INFO L140 encePairwiseOnDemand]: 111/115 looper letters, 12 selfloop transitions, 4 changer transitions 0/23 dead transitions. [2023-08-27 09:49:03,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 108 flow [2023-08-27 09:49:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:49:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:49:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-08-27 09:49:03,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2023-08-27 09:49:03,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-08-27 09:49:03,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-08-27 09:49:03,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:03,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-08-27 09:49:03,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 09:49:03,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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 09:49:03,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 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 09:49:03,495 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 71 flow. Second operand 3 states and 165 transitions. [2023-08-27 09:49:03,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 108 flow [2023-08-27 09:49:03,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 100 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 09:49:03,497 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 65 flow [2023-08-27 09:49:03,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-08-27 09:49:03,497 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-08-27 09:49:03,498 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 65 flow [2023-08-27 09:49:03,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 09:49:03,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:03,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:03,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 09:49:03,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:03,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:03,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1788950243, now seen corresponding path program 1 times [2023-08-27 09:49:03,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:03,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092020716] [2023-08-27 09:49:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:03,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:03,613 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 09:49:03,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:03,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092020716] [2023-08-27 09:49:03,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092020716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:03,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:03,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:49:03,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460940815] [2023-08-27 09:49:03,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:03,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 09:49:03,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:03,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 09:49:03,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:49:03,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 115 [2023-08-27 09:49:03,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 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 09:49:03,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:03,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 115 [2023-08-27 09:49:03,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:03,689 INFO L124 PetriNetUnfolderBase]: 102/222 cut-off events. [2023-08-27 09:49:03,689 INFO L125 PetriNetUnfolderBase]: For 26/28 co-relation queries the response was YES. [2023-08-27 09:49:03,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 222 events. 102/222 cut-off events. For 26/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 689 event pairs, 18 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 566. Up to 89 conditions per place. [2023-08-27 09:49:03,690 INFO L140 encePairwiseOnDemand]: 111/115 looper letters, 31 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-27 09:49:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 203 flow [2023-08-27 09:49:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 09:49:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 09:49:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 238 transitions. [2023-08-27 09:49:03,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41391304347826086 [2023-08-27 09:49:03,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 238 transitions. [2023-08-27 09:49:03,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 238 transitions. [2023-08-27 09:49:03,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:03,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 238 transitions. [2023-08-27 09:49:03,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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 09:49:03,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 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 09:49:03,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 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 09:49:03,695 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 65 flow. Second operand 5 states and 238 transitions. [2023-08-27 09:49:03,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 203 flow [2023-08-27 09:49:03,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 39 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:49:03,697 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 98 flow [2023-08-27 09:49:03,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-27 09:49:03,698 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-27 09:49:03,698 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 98 flow [2023-08-27 09:49:03,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 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 09:49:03,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:03,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:03,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 09:49:03,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:03,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1497445597, now seen corresponding path program 2 times [2023-08-27 09:49:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:03,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490879971] [2023-08-27 09:49:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:03,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:03,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490879971] [2023-08-27 09:49:03,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490879971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:49:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627408503] [2023-08-27 09:49:03,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:49:03,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:03,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:03,853 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 09:49:03,869 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 09:49:03,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:49:03,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:49:03,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 09:49:03,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:49:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:04,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:49:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:04,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627408503] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:49:04,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:49:04,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 09:49:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199973090] [2023-08-27 09:49:04,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:49:04,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 09:49:04,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 09:49:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-27 09:49:04,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 115 [2023-08-27 09:49:04,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 98 flow. Second operand has 17 states, 17 states have (on average 42.64705882352941) internal successors, (725), 17 states have internal predecessors, (725), 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 09:49:04,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:04,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 115 [2023-08-27 09:49:04,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:04,446 INFO L124 PetriNetUnfolderBase]: 137/295 cut-off events. [2023-08-27 09:49:04,446 INFO L125 PetriNetUnfolderBase]: For 72/74 co-relation queries the response was YES. [2023-08-27 09:49:04,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 295 events. 137/295 cut-off events. For 72/74 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 935 event pairs, 14 based on Foata normal form. 3/297 useless extension candidates. Maximal degree in co-relation 752. Up to 89 conditions per place. [2023-08-27 09:49:04,448 INFO L140 encePairwiseOnDemand]: 110/115 looper letters, 42 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2023-08-27 09:49:04,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 293 flow [2023-08-27 09:49:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 09:49:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 09:49:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 366 transitions. [2023-08-27 09:49:04,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978260869565217 [2023-08-27 09:49:04,450 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 366 transitions. [2023-08-27 09:49:04,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 366 transitions. [2023-08-27 09:49:04,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:04,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 366 transitions. [2023-08-27 09:49:04,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 45.75) internal successors, (366), 8 states have internal predecessors, (366), 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 09:49:04,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 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 09:49:04,455 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 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 09:49:04,455 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 98 flow. Second operand 8 states and 366 transitions. [2023-08-27 09:49:04,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 293 flow [2023-08-27 09:49:04,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 293 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 09:49:04,459 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 153 flow [2023-08-27 09:49:04,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=153, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-27 09:49:04,461 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2023-08-27 09:49:04,461 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 153 flow [2023-08-27 09:49:04,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 42.64705882352941) internal successors, (725), 17 states have internal predecessors, (725), 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 09:49:04,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:04,462 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:04,477 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 09:49:04,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:04,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:04,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:04,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1308625303, now seen corresponding path program 3 times [2023-08-27 09:49:04,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:04,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172779255] [2023-08-27 09:49:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:04,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:04,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172779255] [2023-08-27 09:49:04,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172779255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:49:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383401529] [2023-08-27 09:49:04,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:49:04,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:04,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:04,861 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 09:49:04,887 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 09:49:04,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:49:04,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:49:04,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:49:04,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:49:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:05,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:49:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:05,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383401529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:49:05,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:49:05,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-27 09:49:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829604725] [2023-08-27 09:49:05,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:49:05,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 09:49:05,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:05,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 09:49:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-08-27 09:49:05,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 115 [2023-08-27 09:49:05,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 153 flow. Second operand has 22 states, 22 states have (on average 42.59090909090909) internal successors, (937), 22 states have internal predecessors, (937), 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 09:49:05,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:05,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 115 [2023-08-27 09:49:05,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:05,547 INFO L124 PetriNetUnfolderBase]: 205/438 cut-off events. [2023-08-27 09:49:05,547 INFO L125 PetriNetUnfolderBase]: For 279/281 co-relation queries the response was YES. [2023-08-27 09:49:05,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 438 events. 205/438 cut-off events. For 279/281 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1438 event pairs, 14 based on Foata normal form. 9/446 useless extension candidates. Maximal degree in co-relation 1263. Up to 92 conditions per place. [2023-08-27 09:49:05,550 INFO L140 encePairwiseOnDemand]: 110/115 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-27 09:49:05,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 403 flow [2023-08-27 09:49:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 09:49:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 09:49:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 532 transitions. [2023-08-27 09:49:05,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855072463768116 [2023-08-27 09:49:05,553 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 532 transitions. [2023-08-27 09:49:05,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 532 transitions. [2023-08-27 09:49:05,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:05,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 532 transitions. [2023-08-27 09:49:05,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 44.333333333333336) internal successors, (532), 12 states have internal predecessors, (532), 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 09:49:05,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 115.0) internal successors, (1495), 13 states have internal predecessors, (1495), 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 09:49:05,558 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 115.0) internal successors, (1495), 13 states have internal predecessors, (1495), 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 09:49:05,558 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 153 flow. Second operand 12 states and 532 transitions. [2023-08-27 09:49:05,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 403 flow [2023-08-27 09:49:05,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 387 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-27 09:49:05,563 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-27 09:49:05,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-27 09:49:05,565 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-08-27 09:49:05,566 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-27 09:49:05,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 42.59090909090909) internal successors, (937), 22 states have internal predecessors, (937), 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 09:49:05,571 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 2 remaining) [2023-08-27 09:49:05,572 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 2 remaining) [2023-08-27 09:49:05,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 09:49:05,778 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 09:49:05,779 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-27 09:49:05,780 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-27 09:49:05,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 65 transitions, 140 flow [2023-08-27 09:49:05,790 INFO L124 PetriNetUnfolderBase]: 8/74 cut-off events. [2023-08-27 09:49:05,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:05,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 74 events. 8/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-27 09:49:05,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 65 transitions, 140 flow [2023-08-27 09:49:05,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 64 transitions, 136 flow [2023-08-27 09:49:05,791 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:05,791 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 64 transitions, 136 flow [2023-08-27 09:49:05,791 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 64 transitions, 136 flow [2023-08-27 09:49:05,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 64 transitions, 136 flow [2023-08-27 09:49:05,797 INFO L124 PetriNetUnfolderBase]: 8/74 cut-off events. [2023-08-27 09:49:05,797 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:05,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 74 events. 8/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-27 09:49:05,799 INFO L119 LiptonReduction]: Number of co-enabled transitions 1264 [2023-08-27 09:49:06,799 INFO L134 LiptonReduction]: Checked pairs total: 2228 [2023-08-27 09:49:06,799 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-27 09:49:06,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 09:49:06,801 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:06,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-27 09:49:06,804 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:06,804 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-08-27 09:49:06,804 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:06,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:06,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:06,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 09:49:06,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:06,805 INFO L85 PathProgramCache]: Analyzing trace with hash 461026359, now seen corresponding path program 1 times [2023-08-27 09:49:06,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:06,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705660501] [2023-08-27 09:49:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:06,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:49:06,815 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 09:49:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:49:06,833 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 09:49:06,834 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 09:49:06,834 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-27 09:49:06,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-27 09:49:06,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 09:49:06,835 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 09:49:06,835 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-27 09:49:06,836 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 09:49:06,836 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 09:49:06,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-27 09:49:06,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 216 flow [2023-08-27 09:49:06,861 INFO L124 PetriNetUnfolderBase]: 11/99 cut-off events. [2023-08-27 09:49:06,862 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 09:49:06,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 99 events. 11/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2023-08-27 09:49:06,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 96 transitions, 216 flow [2023-08-27 09:49:06,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 77 transitions, 169 flow [2023-08-27 09:49:06,863 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:06,863 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 77 transitions, 169 flow [2023-08-27 09:49:06,863 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 77 transitions, 169 flow [2023-08-27 09:49:06,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 77 transitions, 169 flow [2023-08-27 09:49:06,870 INFO L124 PetriNetUnfolderBase]: 11/99 cut-off events. [2023-08-27 09:49:06,871 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 09:49:06,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 99 events. 11/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-27 09:49:06,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 2330 [2023-08-27 09:49:07,814 INFO L134 LiptonReduction]: Checked pairs total: 6208 [2023-08-27 09:49:07,814 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-27 09:49:07,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:49:07,816 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:07,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-27 09:49:07,818 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:07,818 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-27 09:49:07,819 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:07,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:07,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 09:49:07,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:07,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 551860036, now seen corresponding path program 1 times [2023-08-27 09:49:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121494796] [2023-08-27 09:49:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:07,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:07,850 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 09:49:07,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:07,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121494796] [2023-08-27 09:49:07,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121494796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:07,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:07,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:49:07,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849039852] [2023-08-27 09:49:07,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:07,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:07,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:07,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:07,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 147 [2023-08-27 09:49:07,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 09:49:07,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:07,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 147 [2023-08-27 09:49:07,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:08,154 INFO L124 PetriNetUnfolderBase]: 1822/2739 cut-off events. [2023-08-27 09:49:08,155 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-08-27 09:49:08,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5511 conditions, 2739 events. 1822/2739 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14902 event pairs, 516 based on Foata normal form. 80/2653 useless extension candidates. Maximal degree in co-relation 5500. Up to 1738 conditions per place. [2023-08-27 09:49:08,169 INFO L140 encePairwiseOnDemand]: 133/147 looper letters, 29 selfloop transitions, 6 changer transitions 1/44 dead transitions. [2023-08-27 09:49:08,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 180 flow [2023-08-27 09:49:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:49:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:49:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-08-27 09:49:08,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-08-27 09:49:08,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-08-27 09:49:08,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-08-27 09:49:08,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:08,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-08-27 09:49:08,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 09:49:08,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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 09:49:08,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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 09:49:08,173 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 87 flow. Second operand 3 states and 217 transitions. [2023-08-27 09:49:08,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 180 flow [2023-08-27 09:49:08,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 177 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 09:49:08,174 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 114 flow [2023-08-27 09:49:08,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-08-27 09:49:08,176 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-27 09:49:08,176 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 114 flow [2023-08-27 09:49:08,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 09:49:08,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:08,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:08,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 09:49:08,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:08,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:08,179 INFO L85 PathProgramCache]: Analyzing trace with hash 126195432, now seen corresponding path program 1 times [2023-08-27 09:49:08,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:08,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877309614] [2023-08-27 09:49:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:08,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:08,214 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 09:49:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:08,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877309614] [2023-08-27 09:49:08,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877309614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:08,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:08,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:49:08,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195168693] [2023-08-27 09:49:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:08,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:08,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 147 [2023-08-27 09:49:08,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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 09:49:08,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:08,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 147 [2023-08-27 09:49:08,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:08,260 INFO L124 PetriNetUnfolderBase]: 104/334 cut-off events. [2023-08-27 09:49:08,260 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-27 09:49:08,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 334 events. 104/334 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1637 event pairs, 15 based on Foata normal form. 101/431 useless extension candidates. Maximal degree in co-relation 661. Up to 121 conditions per place. [2023-08-27 09:49:08,262 INFO L140 encePairwiseOnDemand]: 141/147 looper letters, 11 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-08-27 09:49:08,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 152 flow [2023-08-27 09:49:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:49:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:49:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-08-27 09:49:08,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011337868480725 [2023-08-27 09:49:08,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-08-27 09:49:08,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-08-27 09:49:08,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:08,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-08-27 09:49:08,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 09:49:08,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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 09:49:08,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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 09:49:08,266 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 114 flow. Second operand 3 states and 221 transitions. [2023-08-27 09:49:08,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 152 flow [2023-08-27 09:49:08,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 140 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-27 09:49:08,267 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 102 flow [2023-08-27 09:49:08,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-27 09:49:08,268 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-08-27 09:49:08,268 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 102 flow [2023-08-27 09:49:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 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 09:49:08,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:08,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 09:49:08,269 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:08,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash -370191052, now seen corresponding path program 1 times [2023-08-27 09:49:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:08,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895076560] [2023-08-27 09:49:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:08,326 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 09:49:08,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:08,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895076560] [2023-08-27 09:49:08,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895076560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:08,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:08,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:49:08,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266852055] [2023-08-27 09:49:08,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:08,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 09:49:08,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 09:49:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:49:08,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-08-27 09:49:08,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 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 09:49:08,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:08,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-08-27 09:49:08,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:08,452 INFO L124 PetriNetUnfolderBase]: 315/714 cut-off events. [2023-08-27 09:49:08,452 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-08-27 09:49:08,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1856 conditions, 714 events. 315/714 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4269 event pairs, 33 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 1843. Up to 356 conditions per place. [2023-08-27 09:49:08,457 INFO L140 encePairwiseOnDemand]: 139/147 looper letters, 49 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-08-27 09:49:08,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 350 flow [2023-08-27 09:49:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 09:49:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 09:49:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 373 transitions. [2023-08-27 09:49:08,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42290249433106575 [2023-08-27 09:49:08,459 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 373 transitions. [2023-08-27 09:49:08,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 373 transitions. [2023-08-27 09:49:08,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:08,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 373 transitions. [2023-08-27 09:49:08,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:49:08,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 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 09:49:08,462 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 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 09:49:08,462 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 102 flow. Second operand 6 states and 373 transitions. [2023-08-27 09:49:08,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 350 flow [2023-08-27 09:49:08,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:49:08,464 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 182 flow [2023-08-27 09:49:08,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-08-27 09:49:08,465 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-27 09:49:08,465 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 182 flow [2023-08-27 09:49:08,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.6) internal successors, (278), 5 states have internal predecessors, (278), 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 09:49:08,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:08,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:08,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 09:49:08,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:08,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash -298379994, now seen corresponding path program 2 times [2023-08-27 09:49:08,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:08,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580925791] [2023-08-27 09:49:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:08,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:08,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580925791] [2023-08-27 09:49:08,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580925791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:49:08,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531934709] [2023-08-27 09:49:08,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:49:08,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:08,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:08,573 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 09:49:08,598 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 09:49:08,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:49:08,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:49:08,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 09:49:08,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:49:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:08,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:49:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:08,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531934709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:49:08,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:49:08,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 09:49:08,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696711421] [2023-08-27 09:49:08,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:49:08,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 09:49:08,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 09:49:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-27 09:49:08,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 147 [2023-08-27 09:49:08,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 182 flow. Second operand has 20 states, 20 states have (on average 54.85) internal successors, (1097), 20 states have internal predecessors, (1097), 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 09:49:08,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:08,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 147 [2023-08-27 09:49:08,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:09,324 INFO L124 PetriNetUnfolderBase]: 459/1018 cut-off events. [2023-08-27 09:49:09,324 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2023-08-27 09:49:09,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2732 conditions, 1018 events. 459/1018 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6375 event pairs, 25 based on Foata normal form. 8/1022 useless extension candidates. Maximal degree in co-relation 2714. Up to 356 conditions per place. [2023-08-27 09:49:09,331 INFO L140 encePairwiseOnDemand]: 137/147 looper letters, 65 selfloop transitions, 23 changer transitions 0/94 dead transitions. [2023-08-27 09:49:09,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 94 transitions, 559 flow [2023-08-27 09:49:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 09:49:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 09:49:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 652 transitions. [2023-08-27 09:49:09,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40321583178726034 [2023-08-27 09:49:09,334 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 652 transitions. [2023-08-27 09:49:09,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 652 transitions. [2023-08-27 09:49:09,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:09,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 652 transitions. [2023-08-27 09:49:09,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 59.27272727272727) internal successors, (652), 11 states have internal predecessors, (652), 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 09:49:09,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 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 09:49:09,339 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 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 09:49:09,339 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 182 flow. Second operand 11 states and 652 transitions. [2023-08-27 09:49:09,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 94 transitions, 559 flow [2023-08-27 09:49:09,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 94 transitions, 559 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 09:49:09,342 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 325 flow [2023-08-27 09:49:09,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=325, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-27 09:49:09,342 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2023-08-27 09:49:09,343 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 325 flow [2023-08-27 09:49:09,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.85) internal successors, (1097), 20 states have internal predecessors, (1097), 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 09:49:09,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:09,343 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:09,349 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 09:49:09,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:09,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:09,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:09,550 INFO L85 PathProgramCache]: Analyzing trace with hash 689411992, now seen corresponding path program 3 times [2023-08-27 09:49:09,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:09,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963509629] [2023-08-27 09:49:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:09,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:09,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:09,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963509629] [2023-08-27 09:49:09,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963509629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:49:09,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696944299] [2023-08-27 09:49:09,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:49:09,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:09,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:09,637 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 09:49:09,645 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 09:49:09,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:49:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:49:09,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:49:09,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:49:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:09,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:49:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:10,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696944299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:49:10,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:49:10,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 09:49:10,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121376748] [2023-08-27 09:49:10,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:49:10,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 09:49:10,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 09:49:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-27 09:49:10,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 147 [2023-08-27 09:49:10,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 325 flow. Second operand has 24 states, 24 states have (on average 55.125) internal successors, (1323), 24 states have internal predecessors, (1323), 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 09:49:10,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:10,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 147 [2023-08-27 09:49:10,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:10,856 INFO L124 PetriNetUnfolderBase]: 742/1629 cut-off events. [2023-08-27 09:49:10,856 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2023-08-27 09:49:10,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5078 conditions, 1629 events. 742/1629 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 10609 event pairs, 25 based on Foata normal form. 24/1649 useless extension candidates. Maximal degree in co-relation 5053. Up to 426 conditions per place. [2023-08-27 09:49:10,864 INFO L140 encePairwiseOnDemand]: 137/147 looper letters, 0 selfloop transitions, 0 changer transitions 117/117 dead transitions. [2023-08-27 09:49:10,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 117 transitions, 851 flow [2023-08-27 09:49:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 09:49:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 09:49:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 865 transitions. [2023-08-27 09:49:10,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922902494331066 [2023-08-27 09:49:10,867 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 865 transitions. [2023-08-27 09:49:10,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 865 transitions. [2023-08-27 09:49:10,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:10,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 865 transitions. [2023-08-27 09:49:10,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 57.666666666666664) internal successors, (865), 15 states have internal predecessors, (865), 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 09:49:10,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 147.0) internal successors, (2352), 16 states have internal predecessors, (2352), 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 09:49:10,875 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 147.0) internal successors, (2352), 16 states have internal predecessors, (2352), 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 09:49:10,875 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 325 flow. Second operand 15 states and 865 transitions. [2023-08-27 09:49:10,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 117 transitions, 851 flow [2023-08-27 09:49:10,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 117 transitions, 813 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-27 09:49:10,882 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-27 09:49:10,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-27 09:49:10,883 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 27 predicate places. [2023-08-27 09:49:10,883 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-27 09:49:10,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.125) internal successors, (1323), 24 states have internal predecessors, (1323), 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 09:49:10,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2023-08-27 09:49:10,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2023-08-27 09:49:10,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2023-08-27 09:49:10,893 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 09:49:11,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:11,093 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-27 09:49:11,094 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-27 09:49:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 216 flow [2023-08-27 09:49:11,103 INFO L124 PetriNetUnfolderBase]: 11/99 cut-off events. [2023-08-27 09:49:11,103 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 09:49:11,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 99 events. 11/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2023-08-27 09:49:11,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 96 transitions, 216 flow [2023-08-27 09:49:11,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 77 transitions, 169 flow [2023-08-27 09:49:11,104 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:11,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 77 transitions, 169 flow [2023-08-27 09:49:11,104 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 77 transitions, 169 flow [2023-08-27 09:49:11,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 77 transitions, 169 flow [2023-08-27 09:49:11,111 INFO L124 PetriNetUnfolderBase]: 11/99 cut-off events. [2023-08-27 09:49:11,112 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 09:49:11,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 99 events. 11/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-27 09:49:11,113 INFO L119 LiptonReduction]: Number of co-enabled transitions 2330 [2023-08-27 09:49:12,030 INFO L134 LiptonReduction]: Checked pairs total: 6208 [2023-08-27 09:49:12,031 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-27 09:49:12,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 09:49:12,032 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:12,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-27 09:49:12,035 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:12,036 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2023-08-27 09:49:12,036 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 09:49:12,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:12,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:12,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 09:49:12,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash -79477537, now seen corresponding path program 1 times [2023-08-27 09:49:12,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:12,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902498882] [2023-08-27 09:49:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:12,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:49:12,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 09:49:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:49:12,054 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 09:49:12,054 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 09:49:12,054 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-27 09:49:12,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-27 09:49:12,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 09:49:12,055 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 09:49:12,055 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-27 09:49:12,055 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 09:49:12,055 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 09:49:12,074 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-27 09:49:12,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 127 transitions, 296 flow [2023-08-27 09:49:12,084 INFO L124 PetriNetUnfolderBase]: 14/124 cut-off events. [2023-08-27 09:49:12,084 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 09:49:12,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 124 events. 14/124 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-27 09:49:12,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 127 transitions, 296 flow [2023-08-27 09:49:12,086 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 90 transitions, 204 flow [2023-08-27 09:49:12,086 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:12,086 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 90 transitions, 204 flow [2023-08-27 09:49:12,086 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 90 transitions, 204 flow [2023-08-27 09:49:12,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 90 transitions, 204 flow [2023-08-27 09:49:12,094 INFO L124 PetriNetUnfolderBase]: 14/124 cut-off events. [2023-08-27 09:49:12,094 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 09:49:12,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 124 events. 14/124 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 232 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 117. Up to 8 conditions per place. [2023-08-27 09:49:12,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 3708 [2023-08-27 09:49:13,009 INFO L134 LiptonReduction]: Checked pairs total: 10865 [2023-08-27 09:49:13,009 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-27 09:49:13,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:49:13,011 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:13,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-27 09:49:13,012 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:13,012 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-27 09:49:13,012 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:13,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:13,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 09:49:13,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:13,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash 806412482, now seen corresponding path program 1 times [2023-08-27 09:49:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217389716] [2023-08-27 09:49:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:13,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:13,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:13,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217389716] [2023-08-27 09:49:13,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217389716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:13,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:13,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:49:13,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907003990] [2023-08-27 09:49:13,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:13,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:13,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:13,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:13,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 185 [2023-08-27 09:49:13,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 09:49:13,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:13,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 185 [2023-08-27 09:49:13,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:14,445 INFO L124 PetriNetUnfolderBase]: 13843/19049 cut-off events. [2023-08-27 09:49:14,445 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2023-08-27 09:49:14,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38580 conditions, 19049 events. 13843/19049 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 114836 event pairs, 3810 based on Foata normal form. 0/18526 useless extension candidates. Maximal degree in co-relation 38568. Up to 12179 conditions per place. [2023-08-27 09:49:14,618 INFO L140 encePairwiseOnDemand]: 170/185 looper letters, 39 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2023-08-27 09:49:14,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 244 flow [2023-08-27 09:49:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:49:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:49:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-27 09:49:14,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810810810810811 [2023-08-27 09:49:14,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-27 09:49:14,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-27 09:49:14,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:14,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-27 09:49:14,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 09:49:14,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 09:49:14,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 09:49:14,624 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 110 flow. Second operand 3 states and 267 transitions. [2023-08-27 09:49:14,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 244 flow [2023-08-27 09:49:14,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 235 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 09:49:14,628 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 151 flow [2023-08-27 09:49:14,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-27 09:49:14,628 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-27 09:49:14,629 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 151 flow [2023-08-27 09:49:14,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 09:49:14,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:14,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:14,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 09:49:14,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:14,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:14,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1926142328, now seen corresponding path program 1 times [2023-08-27 09:49:14,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:14,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231575699] [2023-08-27 09:49:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:14,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:14,690 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 09:49:14,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:14,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231575699] [2023-08-27 09:49:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231575699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:14,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:14,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:49:14,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981814179] [2023-08-27 09:49:14,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:14,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:14,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:14,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 185 [2023-08-27 09:49:14,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 09:49:14,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:14,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 185 [2023-08-27 09:49:14,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:14,768 INFO L124 PetriNetUnfolderBase]: 303/927 cut-off events. [2023-08-27 09:49:14,769 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-27 09:49:14,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 927 events. 303/927 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5892 event pairs, 39 based on Foata normal form. 413/1331 useless extension candidates. Maximal degree in co-relation 1853. Up to 343 conditions per place. [2023-08-27 09:49:14,780 INFO L140 encePairwiseOnDemand]: 177/185 looper letters, 13 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2023-08-27 09:49:14,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 198 flow [2023-08-27 09:49:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:49:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:49:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-27 09:49:14,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2023-08-27 09:49:14,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-27 09:49:14,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-27 09:49:14,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:14,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-27 09:49:14,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 09:49:14,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 09:49:14,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 09:49:14,784 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 151 flow. Second operand 3 states and 280 transitions. [2023-08-27 09:49:14,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 198 flow [2023-08-27 09:49:14,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 182 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-27 09:49:14,787 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 133 flow [2023-08-27 09:49:14,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-27 09:49:14,788 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-27 09:49:14,788 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 133 flow [2023-08-27 09:49:14,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 09:49:14,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:14,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:14,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 09:49:14,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:14,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:14,789 INFO L85 PathProgramCache]: Analyzing trace with hash 283052121, now seen corresponding path program 1 times [2023-08-27 09:49:14,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:14,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700815835] [2023-08-27 09:49:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:14,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:14,854 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 09:49:14,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:14,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700815835] [2023-08-27 09:49:14,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700815835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:14,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:14,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:49:14,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911622291] [2023-08-27 09:49:14,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:14,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 09:49:14,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:14,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 09:49:14,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:49:14,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 185 [2023-08-27 09:49:14,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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 09:49:14,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:14,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 185 [2023-08-27 09:49:14,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:15,112 INFO L124 PetriNetUnfolderBase]: 935/1975 cut-off events. [2023-08-27 09:49:15,112 INFO L125 PetriNetUnfolderBase]: For 564/565 co-relation queries the response was YES. [2023-08-27 09:49:15,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5259 conditions, 1975 events. 935/1975 cut-off events. For 564/565 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14125 event pairs, 59 based on Foata normal form. 0/1951 useless extension candidates. Maximal degree in co-relation 5245. Up to 1184 conditions per place. [2023-08-27 09:49:15,124 INFO L140 encePairwiseOnDemand]: 174/185 looper letters, 66 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2023-08-27 09:49:15,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 89 transitions, 485 flow [2023-08-27 09:49:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 09:49:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 09:49:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 465 transitions. [2023-08-27 09:49:15,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189189189189189 [2023-08-27 09:49:15,126 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 465 transitions. [2023-08-27 09:49:15,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 465 transitions. [2023-08-27 09:49:15,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:15,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 465 transitions. [2023-08-27 09:49:15,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.5) internal successors, (465), 6 states have internal predecessors, (465), 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 09:49:15,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 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 09:49:15,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 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 09:49:15,130 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 133 flow. Second operand 6 states and 465 transitions. [2023-08-27 09:49:15,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 89 transitions, 485 flow [2023-08-27 09:49:15,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:49:15,135 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 252 flow [2023-08-27 09:49:15,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-08-27 09:49:15,136 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-27 09:49:15,137 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 252 flow [2023-08-27 09:49:15,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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 09:49:15,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:15,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:15,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-27 09:49:15,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:15,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash 626954980, now seen corresponding path program 2 times [2023-08-27 09:49:15,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:15,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458449345] [2023-08-27 09:49:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:15,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:15,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:15,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458449345] [2023-08-27 09:49:15,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458449345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:49:15,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176053198] [2023-08-27 09:49:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:49:15,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:15,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:15,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:49:15,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 09:49:15,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:49:15,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:49:15,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 09:49:15,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:49:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:15,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:49:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:15,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176053198] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:49:15,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:49:15,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 09:49:15,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107707849] [2023-08-27 09:49:15,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:49:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 09:49:15,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 09:49:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-27 09:49:15,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 185 [2023-08-27 09:49:15,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 252 flow. Second operand has 20 states, 20 states have (on average 66.85) internal successors, (1337), 20 states have internal predecessors, (1337), 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 09:49:15,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:15,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 185 [2023-08-27 09:49:15,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:16,272 INFO L124 PetriNetUnfolderBase]: 1415/2925 cut-off events. [2023-08-27 09:49:16,272 INFO L125 PetriNetUnfolderBase]: For 1204/1205 co-relation queries the response was YES. [2023-08-27 09:49:16,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8019 conditions, 2925 events. 1415/2925 cut-off events. For 1204/1205 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22135 event pairs, 41 based on Foata normal form. 20/2943 useless extension candidates. Maximal degree in co-relation 8000. Up to 1202 conditions per place. [2023-08-27 09:49:16,287 INFO L140 encePairwiseOnDemand]: 171/185 looper letters, 88 selfloop transitions, 34 changer transitions 0/129 dead transitions. [2023-08-27 09:49:16,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 129 transitions, 801 flow [2023-08-27 09:49:16,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 09:49:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 09:49:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 815 transitions. [2023-08-27 09:49:16,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004914004914005 [2023-08-27 09:49:16,290 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 815 transitions. [2023-08-27 09:49:16,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 815 transitions. [2023-08-27 09:49:16,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:16,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 815 transitions. [2023-08-27 09:49:16,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 74.0909090909091) internal successors, (815), 11 states have internal predecessors, (815), 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 09:49:16,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 185.0) internal successors, (2220), 12 states have internal predecessors, (2220), 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 09:49:16,295 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 185.0) internal successors, (2220), 12 states have internal predecessors, (2220), 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 09:49:16,295 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 252 flow. Second operand 11 states and 815 transitions. [2023-08-27 09:49:16,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 129 transitions, 801 flow [2023-08-27 09:49:16,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 129 transitions, 801 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 09:49:16,300 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 464 flow [2023-08-27 09:49:16,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=464, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2023-08-27 09:49:16,301 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-27 09:49:16,301 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 464 flow [2023-08-27 09:49:16,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.85) internal successors, (1337), 20 states have internal predecessors, (1337), 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 09:49:16,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:16,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:16,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 09:49:16,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 09:49:16,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-27 09:49:16,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash -900529227, now seen corresponding path program 3 times [2023-08-27 09:49:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:16,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253098922] [2023-08-27 09:49:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:16,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:16,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253098922] [2023-08-27 09:49:16,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253098922] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:49:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520748826] [2023-08-27 09:49:16,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:49:16,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:16,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:16,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:49:16,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 09:49:16,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:49:16,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:49:16,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:49:16,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:49:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:16,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:49:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:16,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520748826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:49:16,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:49:16,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 09:49:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090500753] [2023-08-27 09:49:16,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:49:16,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 09:49:16,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 09:49:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-27 09:49:16,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 185 [2023-08-27 09:49:16,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 464 flow. Second operand has 24 states, 24 states have (on average 67.125) internal successors, (1611), 24 states have internal predecessors, (1611), 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 09:49:16,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:16,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 185 [2023-08-27 09:49:16,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:18,057 INFO L124 PetriNetUnfolderBase]: 2444/5012 cut-off events. [2023-08-27 09:49:18,058 INFO L125 PetriNetUnfolderBase]: For 4004/4005 co-relation queries the response was YES. [2023-08-27 09:49:18,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15926 conditions, 5012 events. 2444/5012 cut-off events. For 4004/4005 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 39701 event pairs, 41 based on Foata normal form. 66/5076 useless extension candidates. Maximal degree in co-relation 15900. Up to 1252 conditions per place. [2023-08-27 09:49:18,078 INFO L140 encePairwiseOnDemand]: 171/185 looper letters, 0 selfloop transitions, 0 changer transitions 164/164 dead transitions. [2023-08-27 09:49:18,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 164 transitions, 1249 flow [2023-08-27 09:49:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 09:49:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 09:49:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1078 transitions. [2023-08-27 09:49:18,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38846846846846844 [2023-08-27 09:49:18,083 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1078 transitions. [2023-08-27 09:49:18,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1078 transitions. [2023-08-27 09:49:18,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:18,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1078 transitions. [2023-08-27 09:49:18,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 71.86666666666666) internal successors, (1078), 15 states have internal predecessors, (1078), 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 09:49:18,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 185.0) internal successors, (2960), 16 states have internal predecessors, (2960), 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 09:49:18,091 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 185.0) internal successors, (2960), 16 states have internal predecessors, (2960), 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 09:49:18,091 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 464 flow. Second operand 15 states and 1078 transitions. [2023-08-27 09:49:18,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 164 transitions, 1249 flow [2023-08-27 09:49:18,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 164 transitions, 1193 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-27 09:49:18,103 INFO L231 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2023-08-27 09:49:18,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2023-08-27 09:49:18,104 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 27 predicate places. [2023-08-27 09:49:18,104 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2023-08-27 09:49:18,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 67.125) internal successors, (1611), 24 states have internal predecessors, (1611), 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 09:49:18,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2023-08-27 09:49:18,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2023-08-27 09:49:18,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2023-08-27 09:49:18,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2023-08-27 09:49:18,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 09:49:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 09:49:18,314 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-27 09:49:18,315 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-27 09:49:18,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 127 transitions, 296 flow [2023-08-27 09:49:18,327 INFO L124 PetriNetUnfolderBase]: 14/124 cut-off events. [2023-08-27 09:49:18,327 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 09:49:18,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 124 events. 14/124 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-27 09:49:18,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 127 transitions, 296 flow [2023-08-27 09:49:18,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 90 transitions, 204 flow [2023-08-27 09:49:18,329 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:18,329 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 90 transitions, 204 flow [2023-08-27 09:49:18,329 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 90 transitions, 204 flow [2023-08-27 09:49:18,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 90 transitions, 204 flow [2023-08-27 09:49:18,338 INFO L124 PetriNetUnfolderBase]: 14/124 cut-off events. [2023-08-27 09:49:18,338 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 09:49:18,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 124 events. 14/124 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 232 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 117. Up to 8 conditions per place. [2023-08-27 09:49:18,341 INFO L119 LiptonReduction]: Number of co-enabled transitions 3708 [2023-08-27 09:49:19,353 INFO L134 LiptonReduction]: Checked pairs total: 13043 [2023-08-27 09:49:19,353 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-27 09:49:19,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 09:49:19,355 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:19,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-27 09:49:19,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:19,358 INFO L124 PetriNetUnfolderBase]: 5/50 cut-off events. [2023-08-27 09:49:19,358 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 09:49:19,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:19,359 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:19,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 09:49:19,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash 798068558, now seen corresponding path program 1 times [2023-08-27 09:49:19,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:19,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026031434] [2023-08-27 09:49:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:49:19,368 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 09:49:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:49:19,376 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 09:49:19,376 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 09:49:19,376 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-27 09:49:19,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-27 09:49:19,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-27 09:49:19,376 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 09:49:19,377 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-27 09:49:19,377 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 09:49:19,377 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-27 09:49:19,398 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-27 09:49:19,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 158 transitions, 380 flow [2023-08-27 09:49:19,408 INFO L124 PetriNetUnfolderBase]: 17/149 cut-off events. [2023-08-27 09:49:19,408 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 09:49:19,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 149 events. 17/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 287 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 169. Up to 10 conditions per place. [2023-08-27 09:49:19,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 158 transitions, 380 flow [2023-08-27 09:49:19,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 103 transitions, 241 flow [2023-08-27 09:49:19,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:19,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 103 transitions, 241 flow [2023-08-27 09:49:19,410 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 103 transitions, 241 flow [2023-08-27 09:49:19,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 103 transitions, 241 flow [2023-08-27 09:49:19,419 INFO L124 PetriNetUnfolderBase]: 17/149 cut-off events. [2023-08-27 09:49:19,419 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 09:49:19,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 149 events. 17/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 289 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 148. Up to 10 conditions per place. [2023-08-27 09:49:19,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 5398 [2023-08-27 09:49:20,361 INFO L134 LiptonReduction]: Checked pairs total: 17353 [2023-08-27 09:49:20,361 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-27 09:49:20,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:49:20,363 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:20,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-27 09:49:20,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:20,364 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-27 09:49:20,364 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:20,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:20,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 09:49:20,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-27 09:49:20,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1099245700, now seen corresponding path program 1 times [2023-08-27 09:49:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:20,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925782121] [2023-08-27 09:49:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:20,382 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 09:49:20,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:20,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925782121] [2023-08-27 09:49:20,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925782121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:20,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:20,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:49:20,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676630322] [2023-08-27 09:49:20,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:20,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:20,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:20,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:20,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:20,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 220 [2023-08-27 09:49:20,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 09:49:20,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:20,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 220 [2023-08-27 09:49:20,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:28,183 INFO L124 PetriNetUnfolderBase]: 106754/138563 cut-off events. [2023-08-27 09:49:28,184 INFO L125 PetriNetUnfolderBase]: For 22554/22554 co-relation queries the response was YES. [2023-08-27 09:49:28,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282183 conditions, 138563 events. 106754/138563 cut-off events. For 22554/22554 co-relation queries the response was YES. Maximal size of possible extension queue 4782. Compared 889032 event pairs, 31159 based on Foata normal form. 0/135389 useless extension candidates. Maximal degree in co-relation 282170. Up to 91906 conditions per place. [2023-08-27 09:49:29,244 INFO L140 encePairwiseOnDemand]: 201/220 looper letters, 49 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2023-08-27 09:49:29,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 316 flow [2023-08-27 09:49:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:49:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:49:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2023-08-27 09:49:29,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787878787878786 [2023-08-27 09:49:29,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2023-08-27 09:49:29,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2023-08-27 09:49:29,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:29,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2023-08-27 09:49:29,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 09:49:29,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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 09:49:29,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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 09:49:29,248 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 143 flow. Second operand 3 states and 322 transitions. [2023-08-27 09:49:29,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 316 flow [2023-08-27 09:49:29,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 297 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 09:49:29,264 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 188 flow [2023-08-27 09:49:29,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2023-08-27 09:49:29,265 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-08-27 09:49:29,265 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 188 flow [2023-08-27 09:49:29,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 09:49:29,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:29,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:29,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-27 09:49:29,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-27 09:49:29,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:29,266 INFO L85 PathProgramCache]: Analyzing trace with hash -899650273, now seen corresponding path program 1 times [2023-08-27 09:49:29,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:29,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308517] [2023-08-27 09:49:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:29,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:29,310 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 09:49:29,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:29,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308517] [2023-08-27 09:49:29,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:29,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:29,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:49:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150970010] [2023-08-27 09:49:29,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:29,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:29,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:29,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 220 [2023-08-27 09:49:29,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 09:49:29,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:29,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 220 [2023-08-27 09:49:29,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:29,513 INFO L124 PetriNetUnfolderBase]: 794/2336 cut-off events. [2023-08-27 09:49:29,513 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-08-27 09:49:29,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 2336 events. 794/2336 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17791 event pairs, 99 based on Foata normal form. 1373/3703 useless extension candidates. Maximal degree in co-relation 4680. Up to 881 conditions per place. [2023-08-27 09:49:29,524 INFO L140 encePairwiseOnDemand]: 210/220 looper letters, 15 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2023-08-27 09:49:29,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 244 flow [2023-08-27 09:49:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:49:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:49:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-27 09:49:29,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2023-08-27 09:49:29,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-27 09:49:29,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-27 09:49:29,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:29,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-27 09:49:29,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 09:49:29,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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 09:49:29,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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 09:49:29,529 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 188 flow. Second operand 3 states and 339 transitions. [2023-08-27 09:49:29,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 244 flow [2023-08-27 09:49:29,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 224 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 09:49:29,533 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 164 flow [2023-08-27 09:49:29,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-27 09:49:29,534 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-08-27 09:49:29,534 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 164 flow [2023-08-27 09:49:29,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 09:49:29,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:29,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:29,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-27 09:49:29,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-27 09:49:29,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 353228952, now seen corresponding path program 1 times [2023-08-27 09:49:29,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566474560] [2023-08-27 09:49:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:29,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:29,617 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 09:49:29,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566474560] [2023-08-27 09:49:29,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566474560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:29,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:29,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:49:29,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564471832] [2023-08-27 09:49:29,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:29,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 09:49:29,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 09:49:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:49:29,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 220 [2023-08-27 09:49:29,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 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 09:49:29,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:29,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 220 [2023-08-27 09:49:29,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:30,136 INFO L124 PetriNetUnfolderBase]: 2359/4757 cut-off events. [2023-08-27 09:49:30,136 INFO L125 PetriNetUnfolderBase]: For 1473/1474 co-relation queries the response was YES. [2023-08-27 09:49:30,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12859 conditions, 4757 events. 2359/4757 cut-off events. For 1473/1474 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 37947 event pairs, 97 based on Foata normal form. 0/4704 useless extension candidates. Maximal degree in co-relation 12844. Up to 3300 conditions per place. [2023-08-27 09:49:30,155 INFO L140 encePairwiseOnDemand]: 206/220 looper letters, 83 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2023-08-27 09:49:30,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 112 transitions, 620 flow [2023-08-27 09:49:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 09:49:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 09:49:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 557 transitions. [2023-08-27 09:49:30,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421969696969697 [2023-08-27 09:49:30,157 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 557 transitions. [2023-08-27 09:49:30,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 557 transitions. [2023-08-27 09:49:30,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:30,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 557 transitions. [2023-08-27 09:49:30,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.83333333333333) internal successors, (557), 6 states have internal predecessors, (557), 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 09:49:30,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 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 09:49:30,162 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 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 09:49:30,162 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 164 flow. Second operand 6 states and 557 transitions. [2023-08-27 09:49:30,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 112 transitions, 620 flow [2023-08-27 09:49:30,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 112 transitions, 594 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:49:30,166 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 322 flow [2023-08-27 09:49:30,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-27 09:49:30,167 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-27 09:49:30,167 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 322 flow [2023-08-27 09:49:30,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 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 09:49:30,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:30,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:30,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-27 09:49:30,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-27 09:49:30,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1209149307, now seen corresponding path program 2 times [2023-08-27 09:49:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:30,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994732704] [2023-08-27 09:49:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:30,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:30,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:30,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994732704] [2023-08-27 09:49:30,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994732704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:49:30,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133646690] [2023-08-27 09:49:30,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:49:30,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:30,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:30,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:49:30,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 09:49:30,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:49:30,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:49:30,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 09:49:30,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:49:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:30,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:49:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133646690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:49:30,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:49:30,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 09:49:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795209757] [2023-08-27 09:49:30,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:49:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 09:49:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 09:49:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-27 09:49:30,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 220 [2023-08-27 09:49:30,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 322 flow. Second operand has 20 states, 20 states have (on average 78.85) internal successors, (1577), 20 states have internal predecessors, (1577), 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 09:49:30,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:30,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 220 [2023-08-27 09:49:30,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:31,469 INFO L124 PetriNetUnfolderBase]: 3565/7061 cut-off events. [2023-08-27 09:49:31,469 INFO L125 PetriNetUnfolderBase]: For 3147/3148 co-relation queries the response was YES. [2023-08-27 09:49:31,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19579 conditions, 7061 events. 3565/7061 cut-off events. For 3147/3148 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60357 event pairs, 61 based on Foata normal form. 40/7100 useless extension candidates. Maximal degree in co-relation 19559. Up to 3390 conditions per place. [2023-08-27 09:49:31,509 INFO L140 encePairwiseOnDemand]: 202/220 looper letters, 111 selfloop transitions, 45 changer transitions 0/164 dead transitions. [2023-08-27 09:49:31,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 164 transitions, 1043 flow [2023-08-27 09:49:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 09:49:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 09:49:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 978 transitions. [2023-08-27 09:49:31,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041322314049587 [2023-08-27 09:49:31,511 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 978 transitions. [2023-08-27 09:49:31,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 978 transitions. [2023-08-27 09:49:31,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:31,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 978 transitions. [2023-08-27 09:49:31,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.9090909090909) internal successors, (978), 11 states have internal predecessors, (978), 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 09:49:31,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 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 09:49:31,516 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 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 09:49:31,516 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 322 flow. Second operand 11 states and 978 transitions. [2023-08-27 09:49:31,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 164 transitions, 1043 flow [2023-08-27 09:49:31,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 164 transitions, 1043 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 09:49:31,528 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 603 flow [2023-08-27 09:49:31,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=603, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2023-08-27 09:49:31,528 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 17 predicate places. [2023-08-27 09:49:31,529 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 603 flow [2023-08-27 09:49:31,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 78.85) internal successors, (1577), 20 states have internal predecessors, (1577), 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 09:49:31,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:31,529 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:31,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 09:49:31,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:31,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-27 09:49:31,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash -250928836, now seen corresponding path program 3 times [2023-08-27 09:49:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:31,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803865153] [2023-08-27 09:49:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:31,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:31,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:31,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803865153] [2023-08-27 09:49:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803865153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:49:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045255490] [2023-08-27 09:49:31,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:49:31,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:49:31,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:49:31,858 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:49:31,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 09:49:31,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:49:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:49:31,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:49:31,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:49:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:32,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:49:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:49:32,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045255490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:49:32,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:49:32,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 09:49:32,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793466959] [2023-08-27 09:49:32,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:49:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 09:49:32,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:32,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 09:49:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-27 09:49:32,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 220 [2023-08-27 09:49:32,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 603 flow. Second operand has 24 states, 24 states have (on average 79.125) internal successors, (1899), 24 states have internal predecessors, (1899), 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 09:49:32,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:32,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 220 [2023-08-27 09:49:32,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:49:33,887 INFO L124 PetriNetUnfolderBase]: 6612/13032 cut-off events. [2023-08-27 09:49:33,887 INFO L125 PetriNetUnfolderBase]: For 10994/10995 co-relation queries the response was YES. [2023-08-27 09:49:33,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41797 conditions, 13032 events. 6612/13032 cut-off events. For 10994/10995 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 117551 event pairs, 61 based on Foata normal form. 156/13187 useless extension candidates. Maximal degree in co-relation 41770. Up to 3162 conditions per place. [2023-08-27 09:49:33,932 INFO L140 encePairwiseOnDemand]: 202/220 looper letters, 0 selfloop transitions, 0 changer transitions 211/211 dead transitions. [2023-08-27 09:49:33,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 211 transitions, 1647 flow [2023-08-27 09:49:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 09:49:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 09:49:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1291 transitions. [2023-08-27 09:49:33,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39121212121212123 [2023-08-27 09:49:33,934 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1291 transitions. [2023-08-27 09:49:33,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1291 transitions. [2023-08-27 09:49:33,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:49:33,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1291 transitions. [2023-08-27 09:49:33,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 86.06666666666666) internal successors, (1291), 15 states have internal predecessors, (1291), 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 09:49:33,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 220.0) internal successors, (3520), 16 states have internal predecessors, (3520), 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 09:49:33,955 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 220.0) internal successors, (3520), 16 states have internal predecessors, (3520), 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 09:49:33,955 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 603 flow. Second operand 15 states and 1291 transitions. [2023-08-27 09:49:33,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 211 transitions, 1647 flow [2023-08-27 09:49:33,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 211 transitions, 1573 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-27 09:49:33,997 INFO L231 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2023-08-27 09:49:33,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2023-08-27 09:49:33,998 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 25 predicate places. [2023-08-27 09:49:33,998 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2023-08-27 09:49:33,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 79.125) internal successors, (1899), 24 states have internal predecessors, (1899), 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 09:49:33,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2023-08-27 09:49:33,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2023-08-27 09:49:33,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2023-08-27 09:49:33,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2023-08-27 09:49:33,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2023-08-27 09:49:34,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 09:49:34,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-27 09:49:34,205 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-27 09:49:34,206 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-27 09:49:34,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 158 transitions, 380 flow [2023-08-27 09:49:34,215 INFO L124 PetriNetUnfolderBase]: 17/149 cut-off events. [2023-08-27 09:49:34,215 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 09:49:34,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 149 events. 17/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 287 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 169. Up to 10 conditions per place. [2023-08-27 09:49:34,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 158 transitions, 380 flow [2023-08-27 09:49:34,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 103 transitions, 241 flow [2023-08-27 09:49:34,216 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:34,216 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 103 transitions, 241 flow [2023-08-27 09:49:34,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 103 transitions, 241 flow [2023-08-27 09:49:34,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 103 transitions, 241 flow [2023-08-27 09:49:34,223 INFO L124 PetriNetUnfolderBase]: 17/149 cut-off events. [2023-08-27 09:49:34,223 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 09:49:34,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 149 events. 17/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 289 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 148. Up to 10 conditions per place. [2023-08-27 09:49:34,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 5398 [2023-08-27 09:49:35,162 INFO L134 LiptonReduction]: Checked pairs total: 17691 [2023-08-27 09:49:35,162 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-27 09:49:35,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 09:49:35,163 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:35,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-27 09:49:35,166 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:35,166 INFO L124 PetriNetUnfolderBase]: 6/63 cut-off events. [2023-08-27 09:49:35,166 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 09:49:35,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:35,167 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:49:35,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 09:49:35,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:35,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1726681220, now seen corresponding path program 1 times [2023-08-27 09:49:35,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:35,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907145896] [2023-08-27 09:49:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:35,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:49:35,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 09:49:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:49:35,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 09:49:35,213 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 09:49:35,213 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-27 09:49:35,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-27 09:49:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-27 09:49:35,213 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 09:49:35,216 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-27 09:49:35,216 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 09:49:35,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-27 09:49:35,249 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-27 09:49:35,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 468 flow [2023-08-27 09:49:35,262 INFO L124 PetriNetUnfolderBase]: 20/174 cut-off events. [2023-08-27 09:49:35,263 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-27 09:49:35,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 174 events. 20/174 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 341 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 201. Up to 12 conditions per place. [2023-08-27 09:49:35,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 189 transitions, 468 flow [2023-08-27 09:49:35,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 116 transitions, 280 flow [2023-08-27 09:49:35,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:49:35,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 116 transitions, 280 flow [2023-08-27 09:49:35,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 116 transitions, 280 flow [2023-08-27 09:49:35,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 116 transitions, 280 flow [2023-08-27 09:49:35,276 INFO L124 PetriNetUnfolderBase]: 20/174 cut-off events. [2023-08-27 09:49:35,277 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-27 09:49:35,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 174 events. 20/174 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 341 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 180. Up to 12 conditions per place. [2023-08-27 09:49:35,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 7400 [2023-08-27 09:49:36,359 INFO L134 LiptonReduction]: Checked pairs total: 25013 [2023-08-27 09:49:36,359 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-27 09:49:36,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:49:36,360 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:49:36,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-27 09:49:36,362 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:49:36,362 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-27 09:49:36,362 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:49:36,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:49:36,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 09:49:36,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:49:36,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:49:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1433926958, now seen corresponding path program 1 times [2023-08-27 09:49:36,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:49:36,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563589667] [2023-08-27 09:49:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:49:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:49:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:49:36,381 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 09:49:36,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:49:36,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563589667] [2023-08-27 09:49:36,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563589667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:49:36,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:49:36,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:49:36,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080302772] [2023-08-27 09:49:36,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:49:36,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:49:36,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:49:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:49:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:49:36,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-08-27 09:49:36,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 09:49:36,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:49:36,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-08-27 09:49:36,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:50:39,531 INFO L124 PetriNetUnfolderBase]: 782236/974548 cut-off events. [2023-08-27 09:50:39,531 INFO L125 PetriNetUnfolderBase]: For 209942/209942 co-relation queries the response was YES. [2023-08-27 09:50:42,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993817 conditions, 974548 events. 782236/974548 cut-off events. For 209942/209942 co-relation queries the response was YES. Maximal size of possible extension queue 26379. Compared 6498241 event pairs, 242001 based on Foata normal form. 0/955476 useless extension candidates. Maximal degree in co-relation 1993803. Up to 661916 conditions per place. [2023-08-27 09:50:46,713 INFO L140 encePairwiseOnDemand]: 236/258 looper letters, 59 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2023-08-27 09:50:46,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 392 flow [2023-08-27 09:50:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:50:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:50:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-27 09:50:46,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2023-08-27 09:50:46,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-27 09:50:46,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-27 09:50:46,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:50:46,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-27 09:50:46,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 09:50:46,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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 09:50:46,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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 09:50:46,716 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 174 flow. Second operand 3 states and 375 transitions. [2023-08-27 09:50:46,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 392 flow [2023-08-27 09:50:46,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 359 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-27 09:50:46,840 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 225 flow [2023-08-27 09:50:46,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-08-27 09:50:46,840 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2023-08-27 09:50:46,840 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 225 flow [2023-08-27 09:50:46,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 09:50:46,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:50:46,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:50:46,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-27 09:50:46,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:50:46,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:50:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash 896900728, now seen corresponding path program 1 times [2023-08-27 09:50:46,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:50:46,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975498491] [2023-08-27 09:50:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:50:46,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:50:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:50:46,870 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 09:50:46,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:50:46,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975498491] [2023-08-27 09:50:46,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975498491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:50:46,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:50:46,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:50:46,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906172903] [2023-08-27 09:50:46,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:50:46,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:50:46,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:50:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:50:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:50:46,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 258 [2023-08-27 09:50:46,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 09:50:46,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:50:46,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 258 [2023-08-27 09:50:46,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:50:47,328 INFO L124 PetriNetUnfolderBase]: 1961/5599 cut-off events. [2023-08-27 09:50:47,328 INFO L125 PetriNetUnfolderBase]: For 1222/1222 co-relation queries the response was YES. [2023-08-27 09:50:47,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11227 conditions, 5599 events. 1961/5599 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 49591 event pairs, 251 based on Foata normal form. 4093/9648 useless extension candidates. Maximal degree in co-relation 11210. Up to 2143 conditions per place. [2023-08-27 09:50:47,355 INFO L140 encePairwiseOnDemand]: 246/258 looper letters, 17 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-08-27 09:50:47,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 290 flow [2023-08-27 09:50:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:50:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:50:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-27 09:50:47,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142118863049095 [2023-08-27 09:50:47,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-27 09:50:47,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-27 09:50:47,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:50:47,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-27 09:50:47,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 09:50:47,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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 09:50:47,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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 09:50:47,358 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 225 flow. Second operand 3 states and 398 transitions. [2023-08-27 09:50:47,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 290 flow [2023-08-27 09:50:47,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 266 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-27 09:50:47,366 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 195 flow [2023-08-27 09:50:47,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-27 09:50:47,367 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2023-08-27 09:50:47,367 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 195 flow [2023-08-27 09:50:47,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 09:50:47,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:50:47,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:50:47,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-27 09:50:47,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:50:47,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:50:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1177374142, now seen corresponding path program 1 times [2023-08-27 09:50:47,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:50:47,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768816269] [2023-08-27 09:50:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:50:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:50:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:50:47,417 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 09:50:47,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:50:47,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768816269] [2023-08-27 09:50:47,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768816269] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:50:47,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:50:47,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:50:47,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724983371] [2023-08-27 09:50:47,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:50:47,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 09:50:47,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:50:47,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 09:50:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:50:47,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 258 [2023-08-27 09:50:47,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 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 09:50:47,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:50:47,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 258 [2023-08-27 09:50:47,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:50:48,097 INFO L124 PetriNetUnfolderBase]: 5523/10804 cut-off events. [2023-08-27 09:50:48,097 INFO L125 PetriNetUnfolderBase]: For 3443/3443 co-relation queries the response was YES. [2023-08-27 09:50:48,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29448 conditions, 10804 events. 5523/10804 cut-off events. For 3443/3443 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 93697 event pairs, 167 based on Foata normal form. 0/10686 useless extension candidates. Maximal degree in co-relation 29432. Up to 8400 conditions per place. [2023-08-27 09:50:48,154 INFO L140 encePairwiseOnDemand]: 241/258 looper letters, 100 selfloop transitions, 26 changer transitions 0/135 dead transitions. [2023-08-27 09:50:48,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 135 transitions, 755 flow [2023-08-27 09:50:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 09:50:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 09:50:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 649 transitions. [2023-08-27 09:50:48,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419250645994832 [2023-08-27 09:50:48,155 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 649 transitions. [2023-08-27 09:50:48,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 649 transitions. [2023-08-27 09:50:48,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:50:48,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 649 transitions. [2023-08-27 09:50:48,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 108.16666666666667) internal successors, (649), 6 states have internal predecessors, (649), 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 09:50:48,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 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 09:50:48,158 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 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 09:50:48,158 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 195 flow. Second operand 6 states and 649 transitions. [2023-08-27 09:50:48,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 135 transitions, 755 flow [2023-08-27 09:50:48,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 135 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:50:48,289 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 392 flow [2023-08-27 09:50:48,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-08-27 09:50:48,289 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2023-08-27 09:50:48,289 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 392 flow [2023-08-27 09:50:48,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 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 09:50:48,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:50:48,290 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:50:48,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-27 09:50:48,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:50:48,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:50:48,290 INFO L85 PathProgramCache]: Analyzing trace with hash 680896704, now seen corresponding path program 2 times [2023-08-27 09:50:48,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:50:48,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021582696] [2023-08-27 09:50:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:50:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:50:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:50:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:50:48,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:50:48,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021582696] [2023-08-27 09:50:48,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021582696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:50:48,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585999039] [2023-08-27 09:50:48,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:50:48,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:50:48,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:50:48,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:50:48,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 09:50:48,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:50:48,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:50:48,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 09:50:48,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:50:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:50:48,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:50:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:50:48,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585999039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:50:48,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:50:48,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 09:50:48,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506134118] [2023-08-27 09:50:48,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:50:48,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 09:50:48,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:50:48,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 09:50:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-27 09:50:48,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 258 [2023-08-27 09:50:48,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 392 flow. Second operand has 20 states, 20 states have (on average 90.85) internal successors, (1817), 20 states have internal predecessors, (1817), 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 09:50:48,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:50:48,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 258 [2023-08-27 09:50:48,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:50:50,286 INFO L124 PetriNetUnfolderBase]: 8073/15566 cut-off events. [2023-08-27 09:50:50,286 INFO L125 PetriNetUnfolderBase]: For 7197/7197 co-relation queries the response was YES. [2023-08-27 09:50:50,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43392 conditions, 15566 events. 8073/15566 cut-off events. For 7197/7197 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 144181 event pairs, 89 based on Foata normal form. 70/15632 useless extension candidates. Maximal degree in co-relation 43371. Up to 8670 conditions per place. [2023-08-27 09:50:50,366 INFO L140 encePairwiseOnDemand]: 236/258 looper letters, 134 selfloop transitions, 56 changer transitions 0/199 dead transitions. [2023-08-27 09:50:50,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 199 transitions, 1285 flow [2023-08-27 09:50:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 09:50:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 09:50:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1141 transitions. [2023-08-27 09:50:50,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40204369274136714 [2023-08-27 09:50:50,367 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1141 transitions. [2023-08-27 09:50:50,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1141 transitions. [2023-08-27 09:50:50,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:50:50,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1141 transitions. [2023-08-27 09:50:50,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 103.72727272727273) internal successors, (1141), 11 states have internal predecessors, (1141), 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 09:50:50,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 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 09:50:50,372 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 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 09:50:50,372 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 392 flow. Second operand 11 states and 1141 transitions. [2023-08-27 09:50:50,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 199 transitions, 1285 flow [2023-08-27 09:50:50,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 199 transitions, 1285 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 09:50:50,387 INFO L231 Difference]: Finished difference. Result has 85 places, 113 transitions, 742 flow [2023-08-27 09:50:50,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=742, PETRI_PLACES=85, PETRI_TRANSITIONS=113} [2023-08-27 09:50:50,387 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 16 predicate places. [2023-08-27 09:50:50,387 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 113 transitions, 742 flow [2023-08-27 09:50:50,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.85) internal successors, (1817), 20 states have internal predecessors, (1817), 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 09:50:50,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:50:50,388 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:50:50,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 09:50:50,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 09:50:50,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:50:50,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:50:50,593 INFO L85 PathProgramCache]: Analyzing trace with hash -168447226, now seen corresponding path program 3 times [2023-08-27 09:50:50,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:50:50,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810606668] [2023-08-27 09:50:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:50:50,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:50:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:50:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:50:50,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:50:50,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810606668] [2023-08-27 09:50:50,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810606668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:50:50,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265069002] [2023-08-27 09:50:50,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:50:50,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:50:50,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:50:50,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:50:50,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 09:50:50,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:50:50,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:50:50,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:50:50,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:50:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:50:50,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:50:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:50:51,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265069002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:50:51,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:50:51,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-27 09:50:51,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703197725] [2023-08-27 09:50:51,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:50:51,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 09:50:51,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:50:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 09:50:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-27 09:50:51,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 258 [2023-08-27 09:50:51,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 113 transitions, 742 flow. Second operand has 24 states, 24 states have (on average 91.125) internal successors, (2187), 24 states have internal predecessors, (2187), 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 09:50:51,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:50:51,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 258 [2023-08-27 09:50:51,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:50:54,491 INFO L124 PetriNetUnfolderBase]: 16174/31113 cut-off events. [2023-08-27 09:50:54,491 INFO L125 PetriNetUnfolderBase]: For 27035/27035 co-relation queries the response was YES. [2023-08-27 09:50:54,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100159 conditions, 31113 events. 16174/31113 cut-off events. For 27035/27035 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 309426 event pairs, 85 based on Foata normal form. 342/31451 useless extension candidates. Maximal degree in co-relation 100131. Up to 7404 conditions per place. [2023-08-27 09:50:54,629 INFO L140 encePairwiseOnDemand]: 236/258 looper letters, 0 selfloop transitions, 0 changer transitions 258/258 dead transitions. [2023-08-27 09:50:54,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 258 transitions, 2045 flow [2023-08-27 09:50:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 09:50:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 09:50:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1504 transitions. [2023-08-27 09:50:54,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3886304909560723 [2023-08-27 09:50:54,633 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1504 transitions. [2023-08-27 09:50:54,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1504 transitions. [2023-08-27 09:50:54,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:50:54,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1504 transitions. [2023-08-27 09:50:54,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 100.26666666666667) internal successors, (1504), 15 states have internal predecessors, (1504), 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 09:50:54,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 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 09:50:54,637 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 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 09:50:54,637 INFO L175 Difference]: Start difference. First operand has 85 places, 113 transitions, 742 flow. Second operand 15 states and 1504 transitions. [2023-08-27 09:50:54,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 258 transitions, 2045 flow [2023-08-27 09:50:54,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 258 transitions, 1953 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-27 09:50:54,722 INFO L231 Difference]: Finished difference. Result has 93 places, 0 transitions, 0 flow [2023-08-27 09:50:54,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=93, PETRI_TRANSITIONS=0} [2023-08-27 09:50:54,722 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 24 predicate places. [2023-08-27 09:50:54,722 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 0 transitions, 0 flow [2023-08-27 09:50:54,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 91.125) internal successors, (2187), 24 states have internal predecessors, (2187), 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 09:50:54,723 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 6 remaining) [2023-08-27 09:50:54,723 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2023-08-27 09:50:54,723 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2023-08-27 09:50:54,723 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 6 remaining) [2023-08-27 09:50:54,723 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-27 09:50:54,723 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-27 09:50:54,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 09:50:54,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 09:50:54,924 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-27 09:50:54,924 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-27 09:50:54,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 468 flow [2023-08-27 09:50:54,934 INFO L124 PetriNetUnfolderBase]: 20/174 cut-off events. [2023-08-27 09:50:54,934 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-27 09:50:54,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 174 events. 20/174 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 341 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 201. Up to 12 conditions per place. [2023-08-27 09:50:54,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 189 transitions, 468 flow [2023-08-27 09:50:54,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 116 transitions, 280 flow [2023-08-27 09:50:54,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:50:54,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 116 transitions, 280 flow [2023-08-27 09:50:54,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 116 transitions, 280 flow [2023-08-27 09:50:54,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 116 transitions, 280 flow [2023-08-27 09:50:54,945 INFO L124 PetriNetUnfolderBase]: 20/174 cut-off events. [2023-08-27 09:50:54,945 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-27 09:50:54,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 174 events. 20/174 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 341 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 180. Up to 12 conditions per place. [2023-08-27 09:50:54,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 7400 [2023-08-27 09:50:55,878 INFO L134 LiptonReduction]: Checked pairs total: 25013 [2023-08-27 09:50:55,878 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-27 09:50:55,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 09:50:55,879 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:50:55,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-27 09:50:55,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:50:55,883 INFO L124 PetriNetUnfolderBase]: 7/76 cut-off events. [2023-08-27 09:50:55,883 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-27 09:50:55,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:50:55,883 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:50:55,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 09:50:55,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:50:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1648479791, now seen corresponding path program 1 times [2023-08-27 09:50:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:50:55,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902615465] [2023-08-27 09:50:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:50:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:50:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:50:55,907 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 09:50:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:50:55,921 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 09:50:55,921 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 09:50:55,921 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-27 09:50:55,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-27 09:50:55,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-27 09:50:55,922 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 09:50:55,922 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-27 09:50:55,922 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 09:50:55,922 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-27 09:50:55,952 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-27 09:50:55,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 220 transitions, 560 flow [2023-08-27 09:50:55,965 INFO L124 PetriNetUnfolderBase]: 23/199 cut-off events. [2023-08-27 09:50:55,965 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-27 09:50:55,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 199 events. 23/199 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 398 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 234. Up to 14 conditions per place. [2023-08-27 09:50:55,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 220 transitions, 560 flow [2023-08-27 09:50:55,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 129 transitions, 321 flow [2023-08-27 09:50:55,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:50:55,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 129 transitions, 321 flow [2023-08-27 09:50:55,967 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 129 transitions, 321 flow [2023-08-27 09:50:55,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 129 transitions, 321 flow [2023-08-27 09:50:56,172 INFO L124 PetriNetUnfolderBase]: 23/199 cut-off events. [2023-08-27 09:50:56,173 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-27 09:50:56,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 199 events. 23/199 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 397 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 213. Up to 14 conditions per place. [2023-08-27 09:50:56,175 INFO L119 LiptonReduction]: Number of co-enabled transitions 9714 [2023-08-27 09:50:57,173 INFO L134 LiptonReduction]: Checked pairs total: 34127 [2023-08-27 09:50:57,173 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-27 09:50:57,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:50:57,175 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;@3b1a129a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:50:57,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-27 09:50:57,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:50:57,177 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-27 09:50:57,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:50:57,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:50:57,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 09:50:57,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-27 09:50:57,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:50:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1806917854, now seen corresponding path program 1 times [2023-08-27 09:50:57,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:50:57,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339555370] [2023-08-27 09:50:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:50:57,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:50:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:50:57,199 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 09:50:57,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:50:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339555370] [2023-08-27 09:50:57,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339555370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:50:57,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:50:57,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:50:57,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234649415] [2023-08-27 09:50:57,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:50:57,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:50:57,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:50:57,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:50:57,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:50:57,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2023-08-27 09:50:57,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 09:50:57,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:50:57,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2023-08-27 09:50:57,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand