/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:07:38,355 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:07:38,427 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 [2023-08-24 00:07:38,431 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:07:38,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:07:38,457 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:07:38,458 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:07:38,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:07:38,459 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:07:38,462 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:07:38,462 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:07:38,462 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:07:38,463 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:07:38,463 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:07:38,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:07:38,464 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:07:38,464 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:07:38,464 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:07:38,464 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:07:38,464 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:07:38,465 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:07:38,465 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:07:38,465 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:07:38,466 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:07:38,466 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:07:38,466 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:07:38,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:07:38,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:07:38,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:07:38,467 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:07:38,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:07:38,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:07:38,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:07:38,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:07:38,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:07:38,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:07:38,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:07:38,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:07:38,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:07:38,786 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:07:38,786 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:07:38,788 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-08-24 00:07:40,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:07:40,472 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:07:40,472 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-08-24 00:07:40,496 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98019cc95/54b49b63d97446f08c8c2ca87e66ac2e/FLAG27e1b1de6 [2023-08-24 00:07:40,512 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98019cc95/54b49b63d97446f08c8c2ca87e66ac2e [2023-08-24 00:07:40,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:07:40,519 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:07:40,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:07:40,522 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:07:40,524 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:07:40,526 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:07:40" (1/1) ... [2023-08-24 00:07:40,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b0ff6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:40, skipping insertion in model container [2023-08-24 00:07:40,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:07:40" (1/1) ... [2023-08-24 00:07:40,581 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:07:41,017 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2023-08-24 00:07:41,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:07:41,066 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:07:41,090 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:07:41,095 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:07:41,101 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 00:07:41,105 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2023-08-24 00:07:41,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:07:41,203 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:07:41,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41 WrapperNode [2023-08-24 00:07:41,203 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:07:41,205 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:07:41,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:07:41,209 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:07:41,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,259 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-08-24 00:07:41,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:07:41,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:07:41,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:07:41,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:07:41,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,274 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,274 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,281 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,288 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,289 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:07:41,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:07:41,293 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:07:41,293 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:07:41,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (1/1) ... [2023-08-24 00:07:41,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:07:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:41,345 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) [2023-08-24 00:07:41,359 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 [2023-08-24 00:07:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:07:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:07:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:07:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:07:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:07:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:07:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:07:41,383 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:07:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:07:41,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:07:41,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:07:41,385 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:07:41,542 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:07:41,543 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:07:41,869 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:07:41,874 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:07:41,874 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-24 00:07:41,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:07:41 BoogieIcfgContainer [2023-08-24 00:07:41,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:07:41,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:07:41,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:07:41,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:07:41,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:07:40" (1/3) ... [2023-08-24 00:07:41,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3483bb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:07:41, skipping insertion in model container [2023-08-24 00:07:41,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:07:41" (2/3) ... [2023-08-24 00:07:41,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3483bb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:07:41, skipping insertion in model container [2023-08-24 00:07:41,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:07:41" (3/3) ... [2023-08-24 00:07:41,882 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-08-24 00:07:41,895 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:07:41,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 00:07:41,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:07:41,937 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:07:41,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-08-24 00:07:42,015 INFO L124 PetriNetUnfolderBase]: 45/265 cut-off events. [2023-08-24 00:07:42,015 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-24 00:07:42,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 265 events. 45/265 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 847 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-24 00:07:42,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-08-24 00:07:42,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-08-24 00:07:42,034 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:07:42,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-24 00:07:42,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-24 00:07:42,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-08-24 00:07:42,093 INFO L124 PetriNetUnfolderBase]: 44/260 cut-off events. [2023-08-24 00:07:42,094 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:07:42,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 260 events. 44/260 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 811 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-24 00:07:42,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 10608 [2023-08-24 00:07:44,565 INFO L134 LiptonReduction]: Checked pairs total: 16839 [2023-08-24 00:07:44,565 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-24 00:07:44,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:07:44,579 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;@391e607c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:07:44,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 00:07:44,583 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:07:44,583 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2023-08-24 00:07:44,583 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:07:44,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:44,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:07:44,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:07:44,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:44,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1124994599, now seen corresponding path program 1 times [2023-08-24 00:07:44,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:44,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695446525] [2023-08-24 00:07:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:44,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:07:44,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695446525] [2023-08-24 00:07:44,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695446525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:07:44,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:07:44,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:07:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496128595] [2023-08-24 00:07:44,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:07:44,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:07:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:07:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:07:44,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 349 [2023-08-24 00:07:44,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2023-08-24 00:07:44,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:44,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 349 [2023-08-24 00:07:44,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:44,882 INFO L124 PetriNetUnfolderBase]: 300/656 cut-off events. [2023-08-24 00:07:44,882 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:07:44,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 656 events. 300/656 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3225 event pairs, 266 based on Foata normal form. 108/654 useless extension candidates. Maximal degree in co-relation 1194. Up to 588 conditions per place. [2023-08-24 00:07:44,886 INFO L140 encePairwiseOnDemand]: 325/349 looper letters, 36 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-24 00:07:44,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 173 flow [2023-08-24 00:07:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:07:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:07:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-24 00:07:44,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.498567335243553 [2023-08-24 00:07:44,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-24 00:07:44,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-24 00:07:44,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:44,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-24 00:07:44,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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) [2023-08-24 00:07:44,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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) [2023-08-24 00:07:44,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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) [2023-08-24 00:07:44,913 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 522 transitions. [2023-08-24 00:07:44,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 173 flow [2023-08-24 00:07:44,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:07:44,918 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 107 flow [2023-08-24 00:07:44,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-24 00:07:44,922 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-24 00:07:44,922 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 107 flow [2023-08-24 00:07:44,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2023-08-24 00:07:44,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:44,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:07:44,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:07:44,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:07:44,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash -142754660, now seen corresponding path program 1 times [2023-08-24 00:07:44,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:44,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049353006] [2023-08-24 00:07:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:44,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:07:44,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:44,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049353006] [2023-08-24 00:07:44,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049353006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:44,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391834316] [2023-08-24 00:07:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:44,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:44,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:44,989 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) [2023-08-24 00:07:45,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 00:07:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:45,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:07:45,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:07:45,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:07:45,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391834316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:07:45,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:07:45,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:07:45,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300638271] [2023-08-24 00:07:45,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:07:45,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:07:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:07:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:07:45,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 349 [2023-08-24 00:07:45,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 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) [2023-08-24 00:07:45,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:45,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 349 [2023-08-24 00:07:45,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:45,242 INFO L124 PetriNetUnfolderBase]: 283/635 cut-off events. [2023-08-24 00:07:45,242 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:07:45,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 635 events. 283/635 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3578 event pairs, 0 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1221. Up to 555 conditions per place. [2023-08-24 00:07:45,245 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 51 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-24 00:07:45,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 243 flow [2023-08-24 00:07:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:07:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:07:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-24 00:07:45,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4918815663801337 [2023-08-24 00:07:45,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-24 00:07:45,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-24 00:07:45,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:45,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-24 00:07:45,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 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) [2023-08-24 00:07:45,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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) [2023-08-24 00:07:45,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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) [2023-08-24 00:07:45,252 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 107 flow. Second operand 3 states and 515 transitions. [2023-08-24 00:07:45,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 243 flow [2023-08-24 00:07:45,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 239 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:07:45,254 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 111 flow [2023-08-24 00:07:45,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-24 00:07:45,255 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2023-08-24 00:07:45,255 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 111 flow [2023-08-24 00:07:45,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 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) [2023-08-24 00:07:45,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:45,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 00:07:45,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 00:07:45,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:45,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:07:45,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash -139929513, now seen corresponding path program 1 times [2023-08-24 00:07:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:45,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298104289] [2023-08-24 00:07:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:07:45,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:45,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298104289] [2023-08-24 00:07:45,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298104289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:45,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009817985] [2023-08-24 00:07:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:45,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:45,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:45,561 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) [2023-08-24 00:07:45,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 00:07:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:45,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:07:45,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:07:45,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:07:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:07:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009817985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:07:45,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:07:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:07:45,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569529986] [2023-08-24 00:07:45,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:07:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:07:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:07:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:07:45,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 349 [2023-08-24 00:07:45,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 111 flow. Second operand has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 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) [2023-08-24 00:07:45,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:45,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 349 [2023-08-24 00:07:45,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:45,831 INFO L124 PetriNetUnfolderBase]: 301/637 cut-off events. [2023-08-24 00:07:45,831 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-24 00:07:45,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 637 events. 301/637 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3091 event pairs, 266 based on Foata normal form. 3/547 useless extension candidates. Maximal degree in co-relation 1245. Up to 571 conditions per place. [2023-08-24 00:07:45,833 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 36 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-08-24 00:07:45,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 205 flow [2023-08-24 00:07:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:07:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:07:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 968 transitions. [2023-08-24 00:07:45,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46227316141356256 [2023-08-24 00:07:45,835 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 968 transitions. [2023-08-24 00:07:45,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 968 transitions. [2023-08-24 00:07:45,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:45,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 968 transitions. [2023-08-24 00:07:45,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.33333333333334) internal successors, (968), 6 states have internal predecessors, (968), 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) [2023-08-24 00:07:45,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 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) [2023-08-24 00:07:45,840 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 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) [2023-08-24 00:07:45,841 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 111 flow. Second operand 6 states and 968 transitions. [2023-08-24 00:07:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 205 flow [2023-08-24 00:07:45,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 00:07:45,842 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 143 flow [2023-08-24 00:07:45,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-08-24 00:07:45,843 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2023-08-24 00:07:45,843 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 143 flow [2023-08-24 00:07:45,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 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) [2023-08-24 00:07:45,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:45,844 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 00:07:45,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 00:07:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-24 00:07:46,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:07:46,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:46,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1589570284, now seen corresponding path program 2 times [2023-08-24 00:07:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:46,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394540691] [2023-08-24 00:07:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:07:46,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394540691] [2023-08-24 00:07:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394540691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556126160] [2023-08-24 00:07:46,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:07:46,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:46,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:46,174 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) [2023-08-24 00:07:46,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 00:07:46,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:07:46,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:07:46,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:07:46,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:07:46,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:07:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:07:46,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556126160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:07:46,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:07:46,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:07:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501874108] [2023-08-24 00:07:46,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:07:46,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:07:46,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:46,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:07:46,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:07:46,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 349 [2023-08-24 00:07:46,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 143 flow. Second operand has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 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) [2023-08-24 00:07:46,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:46,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 349 [2023-08-24 00:07:46,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:46,520 INFO L124 PetriNetUnfolderBase]: 301/643 cut-off events. [2023-08-24 00:07:46,521 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-24 00:07:46,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 643 events. 301/643 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3117 event pairs, 266 based on Foata normal form. 6/556 useless extension candidates. Maximal degree in co-relation 1236. Up to 571 conditions per place. [2023-08-24 00:07:46,524 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 36 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2023-08-24 00:07:46,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 273 flow [2023-08-24 00:07:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:07:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:07:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1901 transitions. [2023-08-24 00:07:46,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45391595033428844 [2023-08-24 00:07:46,528 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1901 transitions. [2023-08-24 00:07:46,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1901 transitions. [2023-08-24 00:07:46,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:46,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1901 transitions. [2023-08-24 00:07:46,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 158.41666666666666) internal successors, (1901), 12 states have internal predecessors, (1901), 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) [2023-08-24 00:07:46,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 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) [2023-08-24 00:07:46,540 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 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) [2023-08-24 00:07:46,540 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 143 flow. Second operand 12 states and 1901 transitions. [2023-08-24 00:07:46,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 273 flow [2023-08-24 00:07:46,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 259 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:07:46,543 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 213 flow [2023-08-24 00:07:46,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-24 00:07:46,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2023-08-24 00:07:46,544 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 213 flow [2023-08-24 00:07:46,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 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) [2023-08-24 00:07:46,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:46,545 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-24 00:07:46,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 00:07:46,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:46,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:07:46,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash -652451060, now seen corresponding path program 3 times [2023-08-24 00:07:46,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:46,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740776926] [2023-08-24 00:07:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:07:46,781 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:07:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:07:46,809 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:07:46,810 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:07:46,810 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-24 00:07:46,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 00:07:46,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 00:07:46,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 00:07:46,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:07:46,812 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-08-24 00:07:46,814 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:07:46,814 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:07:46,835 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:07:46,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 263 transitions, 544 flow [2023-08-24 00:07:46,868 INFO L124 PetriNetUnfolderBase]: 75/432 cut-off events. [2023-08-24 00:07:46,868 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 00:07:46,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 432 events. 75/432 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1744 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 267. Up to 12 conditions per place. [2023-08-24 00:07:46,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 263 transitions, 544 flow [2023-08-24 00:07:46,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 263 transitions, 544 flow [2023-08-24 00:07:46,875 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:07:46,875 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 263 transitions, 544 flow [2023-08-24 00:07:46,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 263 transitions, 544 flow [2023-08-24 00:07:46,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 263 transitions, 544 flow [2023-08-24 00:07:46,907 INFO L124 PetriNetUnfolderBase]: 75/432 cut-off events. [2023-08-24 00:07:46,907 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 00:07:46,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 432 events. 75/432 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1744 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 267. Up to 12 conditions per place. [2023-08-24 00:07:46,927 INFO L119 LiptonReduction]: Number of co-enabled transitions 31960 [2023-08-24 00:07:49,936 INFO L134 LiptonReduction]: Checked pairs total: 54538 [2023-08-24 00:07:49,936 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-24 00:07:49,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:07:49,943 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;@391e607c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:07:49,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 00:07:49,947 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:07:49,947 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-24 00:07:49,947 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:07:49,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:49,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:07:49,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:07:49,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash 95426057, now seen corresponding path program 1 times [2023-08-24 00:07:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:49,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019212992] [2023-08-24 00:07:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:49,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:07:49,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:49,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019212992] [2023-08-24 00:07:49,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019212992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:07:49,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:07:49,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:07:49,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494457002] [2023-08-24 00:07:49,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:07:49,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:07:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:07:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:07:49,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 479 [2023-08-24 00:07:49,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2023-08-24 00:07:49,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:49,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 479 [2023-08-24 00:07:49,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:51,050 INFO L124 PetriNetUnfolderBase]: 9849/15756 cut-off events. [2023-08-24 00:07:51,050 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-08-24 00:07:51,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30204 conditions, 15756 events. 9849/15756 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 104857 event pairs, 9112 based on Foata normal form. 2729/16053 useless extension candidates. Maximal degree in co-relation 12153. Up to 14349 conditions per place. [2023-08-24 00:07:51,115 INFO L140 encePairwiseOnDemand]: 445/479 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-24 00:07:51,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2023-08-24 00:07:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:07:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:07:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-24 00:07:51,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49826026443980515 [2023-08-24 00:07:51,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-24 00:07:51,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-24 00:07:51,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:51,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-24 00:07:51,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:07:51,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-24 00:07:51,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-24 00:07:51,144 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 716 transitions. [2023-08-24 00:07:51,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2023-08-24 00:07:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:07:51,147 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-08-24 00:07:51,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-08-24 00:07:51,150 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-24 00:07:51,150 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-08-24 00:07:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2023-08-24 00:07:51,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:51,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:07:51,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:07:51,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:07:51,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:51,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1897988673, now seen corresponding path program 1 times [2023-08-24 00:07:51,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:51,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688303706] [2023-08-24 00:07:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:51,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:07:51,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688303706] [2023-08-24 00:07:51,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688303706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846743105] [2023-08-24 00:07:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:51,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:51,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:51,209 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) [2023-08-24 00:07:51,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 00:07:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:51,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:07:51,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:07:51,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:07:51,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846743105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:07:51,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:07:51,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:07:51,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196251619] [2023-08-24 00:07:51,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:07:51,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:07:51,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:07:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:07:51,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 479 [2023-08-24 00:07:51,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 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) [2023-08-24 00:07:51,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:51,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 479 [2023-08-24 00:07:51,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:52,396 INFO L124 PetriNetUnfolderBase]: 9940/15711 cut-off events. [2023-08-24 00:07:52,396 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-24 00:07:52,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30159 conditions, 15711 events. 9940/15711 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 102867 event pairs, 6545 based on Foata normal form. 0/13295 useless extension candidates. Maximal degree in co-relation 30146. Up to 14317 conditions per place. [2023-08-24 00:07:52,460 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 72 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-24 00:07:52,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 350 flow [2023-08-24 00:07:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:07:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:07:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 701 transitions. [2023-08-24 00:07:52,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48782185107863607 [2023-08-24 00:07:52,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 701 transitions. [2023-08-24 00:07:52,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 701 transitions. [2023-08-24 00:07:52,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:52,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 701 transitions. [2023-08-24 00:07:52,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 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) [2023-08-24 00:07:52,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-24 00:07:52,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 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) [2023-08-24 00:07:52,465 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 701 transitions. [2023-08-24 00:07:52,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 350 flow [2023-08-24 00:07:52,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 346 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:07:52,468 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-08-24 00:07:52,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-08-24 00:07:52,468 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-24 00:07:52,468 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-08-24 00:07:52,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 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) [2023-08-24 00:07:52,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:52,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:07:52,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 00:07:52,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:52,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:07:52,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash 933163898, now seen corresponding path program 1 times [2023-08-24 00:07:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:52,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430824361] [2023-08-24 00:07:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:07:52,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:52,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430824361] [2023-08-24 00:07:52,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430824361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:52,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785938640] [2023-08-24 00:07:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:52,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:52,724 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) [2023-08-24 00:07:52,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 00:07:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:52,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:07:52,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:07:52,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:07:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:07:52,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785938640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:07:52,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:07:52,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:07:52,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201295812] [2023-08-24 00:07:52,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:07:52,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:07:52,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:07:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:07:52,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 479 [2023-08-24 00:07:52,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 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) [2023-08-24 00:07:52,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:52,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 479 [2023-08-24 00:07:52,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:53,854 INFO L124 PetriNetUnfolderBase]: 9912/15619 cut-off events. [2023-08-24 00:07:53,855 INFO L125 PetriNetUnfolderBase]: For 612/612 co-relation queries the response was YES. [2023-08-24 00:07:53,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30593 conditions, 15619 events. 9912/15619 cut-off events. For 612/612 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 101741 event pairs, 9112 based on Foata normal form. 3/13422 useless extension candidates. Maximal degree in co-relation 30565. Up to 14334 conditions per place. [2023-08-24 00:07:53,896 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 56 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-08-24 00:07:53,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 310 flow [2023-08-24 00:07:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:07:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:07:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1317 transitions. [2023-08-24 00:07:53,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582463465553236 [2023-08-24 00:07:53,900 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1317 transitions. [2023-08-24 00:07:53,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1317 transitions. [2023-08-24 00:07:53,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:53,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1317 transitions. [2023-08-24 00:07:53,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.5) internal successors, (1317), 6 states have internal predecessors, (1317), 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) [2023-08-24 00:07:53,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 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) [2023-08-24 00:07:53,906 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 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) [2023-08-24 00:07:53,906 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1317 transitions. [2023-08-24 00:07:53,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 310 flow [2023-08-24 00:07:53,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:07:53,908 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-08-24 00:07:53,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-24 00:07:53,908 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-08-24 00:07:53,908 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-08-24 00:07:53,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 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) [2023-08-24 00:07:53,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:53,909 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:07:53,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 00:07:54,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:54,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:07:54,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:54,114 INFO L85 PathProgramCache]: Analyzing trace with hash -838271292, now seen corresponding path program 2 times [2023-08-24 00:07:54,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:54,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623351126] [2023-08-24 00:07:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:54,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:07:54,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:54,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623351126] [2023-08-24 00:07:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623351126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:54,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926569282] [2023-08-24 00:07:54,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:07:54,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:54,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:54,192 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) [2023-08-24 00:07:54,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 00:07:54,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 00:07:54,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:07:54,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 00:07:54,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:54,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-24 00:07:54,324 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:07:54,325 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 00:07:54,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-24 00:07:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:07:54,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:07:54,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926569282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:07:54,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:07:54,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 00:07:54,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748429535] [2023-08-24 00:07:54,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:07:54,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:07:54,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:07:54,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:07:54,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 479 [2023-08-24 00:07:54,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 176.5) internal successors, (1059), 6 states have internal predecessors, (1059), 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) [2023-08-24 00:07:54,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:54,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 479 [2023-08-24 00:07:54,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:55,548 INFO L124 PetriNetUnfolderBase]: 10756/17467 cut-off events. [2023-08-24 00:07:55,549 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-08-24 00:07:55,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34326 conditions, 17467 events. 10756/17467 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 122578 event pairs, 2066 based on Foata normal form. 0/15317 useless extension candidates. Maximal degree in co-relation 34290. Up to 12420 conditions per place. [2023-08-24 00:07:55,596 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 134 selfloop transitions, 14 changer transitions 9/169 dead transitions. [2023-08-24 00:07:55,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 169 transitions, 745 flow [2023-08-24 00:07:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:07:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:07:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1204 transitions. [2023-08-24 00:07:55,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41892832289492 [2023-08-24 00:07:55,599 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1204 transitions. [2023-08-24 00:07:55,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1204 transitions. [2023-08-24 00:07:55,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:55,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1204 transitions. [2023-08-24 00:07:55,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 200.66666666666666) internal successors, (1204), 6 states have internal predecessors, (1204), 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) [2023-08-24 00:07:55,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 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) [2023-08-24 00:07:55,604 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 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) [2023-08-24 00:07:55,605 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1204 transitions. [2023-08-24 00:07:55,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 169 transitions, 745 flow [2023-08-24 00:07:55,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 169 transitions, 731 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:07:55,608 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 280 flow [2023-08-24 00:07:55,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-08-24 00:07:55,608 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-08-24 00:07:55,608 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 280 flow [2023-08-24 00:07:55,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.5) internal successors, (1059), 6 states have internal predecessors, (1059), 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) [2023-08-24 00:07:55,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:55,609 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 00:07:55,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 00:07:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:55,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:07:55,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1938024692, now seen corresponding path program 1 times [2023-08-24 00:07:55,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:55,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235103706] [2023-08-24 00:07:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:55,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:07:55,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:07:55,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235103706] [2023-08-24 00:07:55,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235103706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:07:55,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066495623] [2023-08-24 00:07:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:55,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:55,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:07:55,897 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) [2023-08-24 00:07:55,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 00:07:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:07:55,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:07:55,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:07:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:07:55,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:07:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 00:07:56,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066495623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:07:56,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:07:56,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:07:56,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692562776] [2023-08-24 00:07:56,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:07:56,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:07:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:07:56,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:07:56,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:07:56,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 479 [2023-08-24 00:07:56,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 280 flow. Second operand has 13 states, 13 states have (on average 210.3846153846154) internal successors, (2735), 13 states have internal predecessors, (2735), 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) [2023-08-24 00:07:56,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:07:56,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 479 [2023-08-24 00:07:56,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:07:57,132 INFO L124 PetriNetUnfolderBase]: 10260/16620 cut-off events. [2023-08-24 00:07:57,133 INFO L125 PetriNetUnfolderBase]: For 3438/3443 co-relation queries the response was YES. [2023-08-24 00:07:57,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35801 conditions, 16620 events. 10260/16620 cut-off events. For 3438/3443 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 114517 event pairs, 9037 based on Foata normal form. 6/15234 useless extension candidates. Maximal degree in co-relation 35743. Up to 15446 conditions per place. [2023-08-24 00:07:57,188 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 68 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-08-24 00:07:57,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 474 flow [2023-08-24 00:07:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:07:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:07:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2580 transitions. [2023-08-24 00:07:57,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488517745302714 [2023-08-24 00:07:57,193 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2580 transitions. [2023-08-24 00:07:57,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2580 transitions. [2023-08-24 00:07:57,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:07:57,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2580 transitions. [2023-08-24 00:07:57,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 215.0) internal successors, (2580), 12 states have internal predecessors, (2580), 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) [2023-08-24 00:07:57,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 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) [2023-08-24 00:07:57,205 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 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) [2023-08-24 00:07:57,205 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 280 flow. Second operand 12 states and 2580 transitions. [2023-08-24 00:07:57,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 474 flow [2023-08-24 00:07:57,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:07:57,211 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 364 flow [2023-08-24 00:07:57,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=364, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-08-24 00:07:57,212 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-08-24 00:07:57,212 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 364 flow [2023-08-24 00:07:57,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.3846153846154) internal successors, (2735), 13 states have internal predecessors, (2735), 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) [2023-08-24 00:07:57,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:07:57,213 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 00:07:57,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 00:07:57,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:07:57,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:07:57,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:07:57,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1988795212, now seen corresponding path program 2 times [2023-08-24 00:07:57,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:07:57,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575306097] [2023-08-24 00:07:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:07:57,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:07:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:07:57,451 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:07:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:07:57,486 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:07:57,486 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:07:57,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-24 00:07:57,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 00:07:57,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 00:07:57,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 00:07:57,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 00:07:57,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:07:57,487 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-08-24 00:07:57,488 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:07:57,488 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:07:57,525 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:07:57,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 333 transitions, 696 flow [2023-08-24 00:07:57,593 INFO L124 PetriNetUnfolderBase]: 110/632 cut-off events. [2023-08-24 00:07:57,594 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 00:07:57,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 632 events. 110/632 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2794 event pairs, 1 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 440. Up to 16 conditions per place. [2023-08-24 00:07:57,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 333 transitions, 696 flow [2023-08-24 00:07:57,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 333 transitions, 696 flow [2023-08-24 00:07:57,606 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:07:57,606 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 333 transitions, 696 flow [2023-08-24 00:07:57,606 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 333 transitions, 696 flow [2023-08-24 00:07:57,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 333 transitions, 696 flow [2023-08-24 00:07:57,670 INFO L124 PetriNetUnfolderBase]: 110/632 cut-off events. [2023-08-24 00:07:57,670 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 00:07:57,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 632 events. 110/632 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2794 event pairs, 1 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 440. Up to 16 conditions per place. [2023-08-24 00:07:57,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 62424 [2023-08-24 00:08:00,593 INFO L134 LiptonReduction]: Checked pairs total: 101187 [2023-08-24 00:08:00,593 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-08-24 00:08:00,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:08:00,595 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;@391e607c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:08:00,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 00:08:00,596 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:08:00,596 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-08-24 00:08:00,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:08:00,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:08:00,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:08:00,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:08:00,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:08:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1497660548, now seen corresponding path program 1 times [2023-08-24 00:08:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:08:00,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123922109] [2023-08-24 00:08:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:08:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:08:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:08:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:08:00,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:08:00,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123922109] [2023-08-24 00:08:00,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123922109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:08:00,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:08:00,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:08:00,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377953098] [2023-08-24 00:08:00,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:08:00,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:08:00,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:08:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:08:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:08:00,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-24 00:08:00,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 129 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 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) [2023-08-24 00:08:00,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:08:00,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-24 00:08:00,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:08:20,450 INFO L124 PetriNetUnfolderBase]: 252661/348965 cut-off events. [2023-08-24 00:08:20,454 INFO L125 PetriNetUnfolderBase]: For 3589/3589 co-relation queries the response was YES. [2023-08-24 00:08:21,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681977 conditions, 348965 events. 252661/348965 cut-off events. For 3589/3589 co-relation queries the response was YES. Maximal size of possible extension queue 8439. Compared 2626064 event pairs, 240676 based on Foata normal form. 57687/354412 useless extension candidates. Maximal degree in co-relation 94389. Up to 330814 conditions per place. [2023-08-24 00:08:22,199 INFO L140 encePairwiseOnDemand]: 557/600 looper letters, 73 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-24 00:08:22,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 360 flow [2023-08-24 00:08:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:08:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:08:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-08-24 00:08:22,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2023-08-24 00:08:22,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-08-24 00:08:22,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-08-24 00:08:22,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:08:22,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-08-24 00:08:22,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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) [2023-08-24 00:08:22,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 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) [2023-08-24 00:08:22,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 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) [2023-08-24 00:08:22,212 INFO L175 Difference]: Start difference. First operand has 88 places, 129 transitions, 288 flow. Second operand 3 states and 908 transitions. [2023-08-24 00:08:22,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 360 flow [2023-08-24 00:08:22,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:08:22,216 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-08-24 00:08:22,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-08-24 00:08:22,218 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-08-24 00:08:22,218 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-08-24 00:08:22,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 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) [2023-08-24 00:08:22,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:08:22,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:08:22,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 00:08:22,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:08:22,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:08:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash 148653204, now seen corresponding path program 1 times [2023-08-24 00:08:22,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:08:22,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030429307] [2023-08-24 00:08:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:08:22,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:08:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:08:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:08:22,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:08:22,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030429307] [2023-08-24 00:08:22,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030429307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:08:22,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027377341] [2023-08-24 00:08:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:08:22,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:08:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:08:22,248 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) [2023-08-24 00:08:22,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 00:08:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:08:22,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-24 00:08:22,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:08:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 00:08:22,327 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:08:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027377341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:08:22,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:08:22,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-24 00:08:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803275842] [2023-08-24 00:08:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:08:22,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:08:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:08:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:08:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 00:08:22,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-24 00:08:22,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 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) [2023-08-24 00:08:22,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:08:22,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-24 00:08:22,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:08:41,550 INFO L124 PetriNetUnfolderBase]: 255072/349626 cut-off events. [2023-08-24 00:08:41,550 INFO L125 PetriNetUnfolderBase]: For 3507/3507 co-relation queries the response was YES. [2023-08-24 00:08:42,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682588 conditions, 349626 events. 255072/349626 cut-off events. For 3507/3507 co-relation queries the response was YES. Maximal size of possible extension queue 8357. Compared 2584375 event pairs, 196349 based on Foata normal form. 0/297626 useless extension candidates. Maximal degree in co-relation 682574. Up to 330782 conditions per place. [2023-08-24 00:08:43,210 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 90 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-24 00:08:43,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 107 transitions, 438 flow [2023-08-24 00:08:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:08:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:08:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 884 transitions. [2023-08-24 00:08:43,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4911111111111111 [2023-08-24 00:08:43,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 884 transitions. [2023-08-24 00:08:43,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 884 transitions. [2023-08-24 00:08:43,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:08:43,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 884 transitions. [2023-08-24 00:08:43,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 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) [2023-08-24 00:08:43,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 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) [2023-08-24 00:08:43,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 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) [2023-08-24 00:08:43,216 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 884 transitions. [2023-08-24 00:08:43,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 107 transitions, 438 flow [2023-08-24 00:08:43,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 434 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:08:43,219 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-08-24 00:08:43,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-08-24 00:08:43,220 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-08-24 00:08:43,220 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-08-24 00:08:43,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 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) [2023-08-24 00:08:43,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:08:43,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:08:43,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 00:08:43,424 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,SelfDestructingSolverStorable12 [2023-08-24 00:08:43,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:08:43,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:08:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash 381614272, now seen corresponding path program 1 times [2023-08-24 00:08:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:08:43,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070102644] [2023-08-24 00:08:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:08:43,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:08:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:08:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:08:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:08:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070102644] [2023-08-24 00:08:43,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070102644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:08:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221195175] [2023-08-24 00:08:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:08:43,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:08:43,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:08:43,461 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) [2023-08-24 00:08:43,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 00:08:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:08:43,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:08:43,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:08:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:08:43,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:08:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:08:43,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221195175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:08:43,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:08:43,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:08:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109794179] [2023-08-24 00:08:43,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:08:43,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:08:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:08:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:08:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:08:43,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-24 00:08:43,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 266.0) internal successors, (1862), 7 states have internal predecessors, (1862), 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) [2023-08-24 00:08:43,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:08:43,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-24 00:08:43,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:03,290 INFO L124 PetriNetUnfolderBase]: 254329/349484 cut-off events. [2023-08-24 00:09:03,291 INFO L125 PetriNetUnfolderBase]: For 12214/12214 co-relation queries the response was YES. [2023-08-24 00:09:04,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691246 conditions, 349484 events. 254329/349484 cut-off events. For 12214/12214 co-relation queries the response was YES. Maximal size of possible extension queue 8370. Compared 2597160 event pairs, 240676 based on Foata normal form. 3/301654 useless extension candidates. Maximal degree in co-relation 691217. Up to 330799 conditions per place. [2023-08-24 00:09:05,194 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 74 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-24 00:09:05,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 398 flow [2023-08-24 00:09:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:09:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:09:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1665 transitions. [2023-08-24 00:09:05,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-08-24 00:09:05,212 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1665 transitions. [2023-08-24 00:09:05,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1665 transitions. [2023-08-24 00:09:05,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:05,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1665 transitions. [2023-08-24 00:09:05,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 277.5) internal successors, (1665), 6 states have internal predecessors, (1665), 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) [2023-08-24 00:09:05,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 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) [2023-08-24 00:09:05,228 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 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) [2023-08-24 00:09:05,228 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1665 transitions. [2023-08-24 00:09:05,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 398 flow [2023-08-24 00:09:05,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:09:05,250 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-08-24 00:09:05,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-08-24 00:09:05,251 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-08-24 00:09:05,251 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-08-24 00:09:05,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 266.0) internal successors, (1862), 7 states have internal predecessors, (1862), 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) [2023-08-24 00:09:05,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:05,252 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:05,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 00:09:05,459 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,SelfDestructingSolverStorable13 [2023-08-24 00:09:05,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:09:05,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:05,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1112267864, now seen corresponding path program 2 times [2023-08-24 00:09:05,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:05,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552379510] [2023-08-24 00:09:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:05,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:09:05,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552379510] [2023-08-24 00:09:05,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552379510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032843845] [2023-08-24 00:09:05,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:09:05,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:05,565 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) [2023-08-24 00:09:05,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 00:09:05,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 00:09:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:09:05,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 00:09:05,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:05,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-24 00:09:05,731 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:09:05,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 00:09:05,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-24 00:09:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 00:09:05,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 00:09:05,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032843845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:09:05,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 00:09:05,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-24 00:09:05,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877068132] [2023-08-24 00:09:05,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:09:05,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:09:05,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:09:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-24 00:09:05,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 600 [2023-08-24 00:09:05,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 225.5) internal successors, (1353), 6 states have internal predecessors, (1353), 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) [2023-08-24 00:09:05,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:05,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 600 [2023-08-24 00:09:05,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:27,094 INFO L124 PetriNetUnfolderBase]: 278196/384453 cut-off events. [2023-08-24 00:09:27,094 INFO L125 PetriNetUnfolderBase]: For 13287/13287 co-relation queries the response was YES. [2023-08-24 00:09:28,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764086 conditions, 384453 events. 278196/384453 cut-off events. For 13287/13287 co-relation queries the response was YES. Maximal size of possible extension queue 9844. Compared 2978562 event pairs, 57257 based on Foata normal form. 0/335607 useless extension candidates. Maximal degree in co-relation 764049. Up to 316240 conditions per place. [2023-08-24 00:09:29,513 INFO L140 encePairwiseOnDemand]: 590/600 looper letters, 201 selfloop transitions, 18 changer transitions 0/233 dead transitions. [2023-08-24 00:09:29,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 233 transitions, 1029 flow [2023-08-24 00:09:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:09:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:09:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1560 transitions. [2023-08-24 00:09:29,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-08-24 00:09:29,516 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1560 transitions. [2023-08-24 00:09:29,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1560 transitions. [2023-08-24 00:09:29,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:29,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1560 transitions. [2023-08-24 00:09:29,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 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) [2023-08-24 00:09:29,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 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) [2023-08-24 00:09:29,522 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 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) [2023-08-24 00:09:29,522 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1560 transitions. [2023-08-24 00:09:29,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 233 transitions, 1029 flow [2023-08-24 00:09:29,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 233 transitions, 1015 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:09:29,535 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 353 flow [2023-08-24 00:09:29,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2023-08-24 00:09:29,536 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 19 predicate places. [2023-08-24 00:09:29,536 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 353 flow [2023-08-24 00:09:29,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 225.5) internal successors, (1353), 6 states have internal predecessors, (1353), 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) [2023-08-24 00:09:29,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:29,537 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:29,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 00:09:29,741 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,SelfDestructingSolverStorable14 [2023-08-24 00:09:29,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:09:29,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:29,742 INFO L85 PathProgramCache]: Analyzing trace with hash -316401471, now seen corresponding path program 1 times [2023-08-24 00:09:29,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:29,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690894792] [2023-08-24 00:09:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:29,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:09:29,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:29,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690894792] [2023-08-24 00:09:29,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690894792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:29,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419657148] [2023-08-24 00:09:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:29,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:29,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:29,799 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:09:29,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 00:09:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:29,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 00:09:29,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:09:29,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:09:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 00:09:29,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419657148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:09:29,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:09:29,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 00:09:29,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579203052] [2023-08-24 00:09:29,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:09:29,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 00:09:29,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:09:29,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 00:09:29,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 00:09:29,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-24 00:09:29,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 353 flow. Second operand has 13 states, 13 states have (on average 265.61538461538464) internal successors, (3453), 13 states have internal predecessors, (3453), 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) [2023-08-24 00:09:29,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:09:29,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-24 00:09:29,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:09:54,283 INFO L124 PetriNetUnfolderBase]: 264138/366715 cut-off events. [2023-08-24 00:09:54,284 INFO L125 PetriNetUnfolderBase]: For 66426/66431 co-relation queries the response was YES. [2023-08-24 00:09:55,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785980 conditions, 366715 events. 264138/366715 cut-off events. For 66426/66431 co-relation queries the response was YES. Maximal size of possible extension queue 9604. Compared 2832000 event pairs, 236106 based on Foata normal form. 6/332289 useless extension candidates. Maximal degree in co-relation 785921. Up to 350272 conditions per place. [2023-08-24 00:09:56,913 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 90 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-08-24 00:09:56,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 116 transitions, 591 flow [2023-08-24 00:09:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 00:09:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 00:09:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3258 transitions. [2023-08-24 00:09:56,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2023-08-24 00:09:56,919 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3258 transitions. [2023-08-24 00:09:56,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3258 transitions. [2023-08-24 00:09:56,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:09:56,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3258 transitions. [2023-08-24 00:09:56,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 271.5) internal successors, (3258), 12 states have internal predecessors, (3258), 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) [2023-08-24 00:09:56,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 600.0) internal successors, (7800), 13 states have internal predecessors, (7800), 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) [2023-08-24 00:09:56,932 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 600.0) internal successors, (7800), 13 states have internal predecessors, (7800), 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) [2023-08-24 00:09:56,932 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 353 flow. Second operand 12 states and 3258 transitions. [2023-08-24 00:09:56,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 116 transitions, 591 flow [2023-08-24 00:09:57,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 116 transitions, 591 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:09:57,073 INFO L231 Difference]: Finished difference. Result has 124 places, 116 transitions, 437 flow [2023-08-24 00:09:57,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=437, PETRI_PLACES=124, PETRI_TRANSITIONS=116} [2023-08-24 00:09:57,074 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 36 predicate places. [2023-08-24 00:09:57,074 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 116 transitions, 437 flow [2023-08-24 00:09:57,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 265.61538461538464) internal successors, (3453), 13 states have internal predecessors, (3453), 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) [2023-08-24 00:09:57,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:09:57,075 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:09:57,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-24 00:09:57,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 00:09:57,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:09:57,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:09:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash 994509249, now seen corresponding path program 2 times [2023-08-24 00:09:57,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:09:57,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890273907] [2023-08-24 00:09:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:09:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:09:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:09:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-24 00:09:57,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:09:57,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890273907] [2023-08-24 00:09:57,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890273907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:09:57,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708609936] [2023-08-24 00:09:57,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 00:09:57,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:09:57,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:09:57,475 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:09:57,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 00:09:57,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 00:09:57,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 00:09:57,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 00:09:57,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:09:57,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-24 00:09:57,628 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 00:09:57,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 00:09:57,640 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-24 00:09:57,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-24 00:09:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-24 00:09:57,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:10:05,723 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_432 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_432) |c_~#a~0.base|))) is different from false [2023-08-24 00:10:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-24 00:10:05,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708609936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:10:05,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:10:05,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-24 00:10:05,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456005147] [2023-08-24 00:10:05,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:10:05,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 00:10:05,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:10:05,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 00:10:05,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=4, NotChecked=18, Total=132 [2023-08-24 00:10:05,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 600 [2023-08-24 00:10:05,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 116 transitions, 437 flow. Second operand has 12 states, 12 states have (on average 226.5) internal successors, (2718), 12 states have internal predecessors, (2718), 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) [2023-08-24 00:10:05,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:10:05,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 600 [2023-08-24 00:10:05,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:10:38,831 INFO L124 PetriNetUnfolderBase]: 310672/429354 cut-off events. [2023-08-24 00:10:38,831 INFO L125 PetriNetUnfolderBase]: For 77151/77151 co-relation queries the response was YES. [2023-08-24 00:10:41,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921171 conditions, 429354 events. 310672/429354 cut-off events. For 77151/77151 co-relation queries the response was YES. Maximal size of possible extension queue 11393. Compared 3335407 event pairs, 67911 based on Foata normal form. 0/393600 useless extension candidates. Maximal degree in co-relation 921087. Up to 316368 conditions per place. [2023-08-24 00:10:42,899 INFO L140 encePairwiseOnDemand]: 586/600 looper letters, 250 selfloop transitions, 36 changer transitions 0/300 dead transitions. [2023-08-24 00:10:42,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 300 transitions, 1496 flow [2023-08-24 00:10:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 00:10:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 00:10:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1834 transitions. [2023-08-24 00:10:42,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43666666666666665 [2023-08-24 00:10:42,902 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1834 transitions. [2023-08-24 00:10:42,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1834 transitions. [2023-08-24 00:10:42,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:10:42,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1834 transitions. [2023-08-24 00:10:42,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 262.0) internal successors, (1834), 7 states have internal predecessors, (1834), 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) [2023-08-24 00:10:42,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 600.0) internal successors, (4800), 8 states have internal predecessors, (4800), 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) [2023-08-24 00:10:42,908 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 600.0) internal successors, (4800), 8 states have internal predecessors, (4800), 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) [2023-08-24 00:10:42,908 INFO L175 Difference]: Start difference. First operand has 124 places, 116 transitions, 437 flow. Second operand 7 states and 1834 transitions. [2023-08-24 00:10:42,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 300 transitions, 1496 flow [2023-08-24 00:10:43,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 300 transitions, 1448 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-24 00:10:43,185 INFO L231 Difference]: Finished difference. Result has 129 places, 136 transitions, 614 flow [2023-08-24 00:10:43,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=614, PETRI_PLACES=129, PETRI_TRANSITIONS=136} [2023-08-24 00:10:43,185 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 41 predicate places. [2023-08-24 00:10:43,185 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 136 transitions, 614 flow [2023-08-24 00:10:43,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 226.5) internal successors, (2718), 12 states have internal predecessors, (2718), 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) [2023-08-24 00:10:43,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:10:43,186 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 00:10:43,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 00:10:43,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 00:10:43,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:10:43,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:10:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1089160375, now seen corresponding path program 1 times [2023-08-24 00:10:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:10:43,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649818471] [2023-08-24 00:10:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:10:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:10:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:10:43,408 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:10:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:10:43,422 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:10:43,422 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:10:43,422 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-24 00:10:43,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-24 00:10:43,422 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-24 00:10:43,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-24 00:10:43,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-24 00:10:43,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-24 00:10:43,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 00:10:43,423 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-24 00:10:43,423 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:10:43,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:10:43,629 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:10:43,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 403 transitions, 850 flow [2023-08-24 00:10:43,725 INFO L124 PetriNetUnfolderBase]: 157/900 cut-off events. [2023-08-24 00:10:43,725 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 00:10:43,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 900 events. 157/900 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4280 event pairs, 6 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 652. Up to 32 conditions per place. [2023-08-24 00:10:43,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 403 transitions, 850 flow [2023-08-24 00:10:43,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 403 transitions, 850 flow [2023-08-24 00:10:43,750 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:10:43,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 339 places, 403 transitions, 850 flow [2023-08-24 00:10:43,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 339 places, 403 transitions, 850 flow [2023-08-24 00:10:43,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 403 transitions, 850 flow [2023-08-24 00:10:43,842 INFO L124 PetriNetUnfolderBase]: 157/900 cut-off events. [2023-08-24 00:10:43,842 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 00:10:43,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 900 events. 157/900 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4280 event pairs, 6 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 652. Up to 32 conditions per place. [2023-08-24 00:10:43,896 INFO L119 LiptonReduction]: Number of co-enabled transitions 102544 [2023-08-24 00:10:47,502 INFO L134 LiptonReduction]: Checked pairs total: 183968 [2023-08-24 00:10:47,502 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-24 00:10:47,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:10:47,503 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;@391e607c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:10:47,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 00:10:47,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:10:47,505 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-08-24 00:10:47,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:10:47,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:10:47,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 00:10:47,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-24 00:10:47,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:10:47,505 INFO L85 PathProgramCache]: Analyzing trace with hash 543091545, now seen corresponding path program 1 times [2023-08-24 00:10:47,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:10:47,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124993777] [2023-08-24 00:10:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:10:47,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:10:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:10:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:10:47,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:10:47,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124993777] [2023-08-24 00:10:47,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124993777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:10:47,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:10:47,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:10:47,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463744218] [2023-08-24 00:10:47,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:10:47,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:10:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:10:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:10:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:10:47,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 731 [2023-08-24 00:10:47,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 160 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 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) [2023-08-24 00:10:47,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:10:47,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 731 [2023-08-24 00:10:47,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand