/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 15:53:23,208 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 15:53:23,288 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 15:53:23,292 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 15:53:23,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 15:53:23,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 15:53:23,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 15:53:23,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 15:53:23,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 15:53:23,325 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 15:53:23,325 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 15:53:23,326 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 15:53:23,326 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 15:53:23,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 15:53:23,327 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 15:53:23,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 15:53:23,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 15:53:23,327 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 15:53:23,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 15:53:23,328 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 15:53:23,328 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 15:53:23,330 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 15:53:23,330 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 15:53:23,331 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 15:53:23,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 15:53:23,331 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 15:53:23,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 15:53:23,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:53:23,332 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 15:53:23,332 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 15:53:23,333 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 15:53:23,333 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 15:53:23,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 15:53:23,333 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 15:53:23,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 15:53:23,334 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 15:53:23,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 15:53:23,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 15:53:23,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 15:53:23,627 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 15:53:23,628 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 15:53:23,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-24 15:53:24,827 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 15:53:25,037 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 15:53:25,038 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-24 15:53:25,043 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb89313d/db231f95b6da47dc834d6a133f0c7cd2/FLAGffc1eaf0b [2023-08-24 15:53:25,053 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb89313d/db231f95b6da47dc834d6a133f0c7cd2 [2023-08-24 15:53:25,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 15:53:25,056 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 15:53:25,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 15:53:25,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 15:53:25,059 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 15:53:25,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e29f683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25, skipping insertion in model container [2023-08-24 15:53:25,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,079 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 15:53:25,217 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-24 15:53:25,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:53:25,237 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 15:53:25,278 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c[2434,2447] [2023-08-24 15:53:25,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:53:25,295 INFO L206 MainTranslator]: Completed translation [2023-08-24 15:53:25,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25 WrapperNode [2023-08-24 15:53:25,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 15:53:25,297 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 15:53:25,297 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 15:53:25,297 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 15:53:25,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,320 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,349 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 109 [2023-08-24 15:53:25,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 15:53:25,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 15:53:25,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 15:53:25,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 15:53:25,357 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,381 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 15:53:25,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 15:53:25,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 15:53:25,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 15:53:25,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (1/1) ... [2023-08-24 15:53:25,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:53:25,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:25,432 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 15:53:25,458 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 15:53:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 15:53:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 15:53:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 15:53:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 15:53:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 15:53:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 15:53:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 15:53:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 15:53:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 15:53:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 15:53:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 15:53:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 15:53:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 15:53:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 15:53:25,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 15:53:25,474 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 15:53:25,586 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 15:53:25,588 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 15:53:25,859 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 15:53:25,866 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 15:53:25,867 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 15:53:25,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:53:25 BoogieIcfgContainer [2023-08-24 15:53:25,869 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 15:53:25,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 15:53:25,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 15:53:25,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 15:53:25,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:53:25" (1/3) ... [2023-08-24 15:53:25,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d8ed20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:53:25, skipping insertion in model container [2023-08-24 15:53:25,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:53:25" (2/3) ... [2023-08-24 15:53:25,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d8ed20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:53:25, skipping insertion in model container [2023-08-24 15:53:25,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:53:25" (3/3) ... [2023-08-24 15:53:25,875 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-08-24 15:53:25,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 15:53:25,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 15:53:25,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 15:53:25,991 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 15:53:26,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 179 transitions, 382 flow [2023-08-24 15:53:26,140 INFO L124 PetriNetUnfolderBase]: 15/176 cut-off events. [2023-08-24 15:53:26,141 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:53:26,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 176 events. 15/176 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 213 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 130. Up to 2 conditions per place. [2023-08-24 15:53:26,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 179 transitions, 382 flow [2023-08-24 15:53:26,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 166 transitions, 350 flow [2023-08-24 15:53:26,156 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 15:53:26,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 166 transitions, 350 flow [2023-08-24 15:53:26,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 166 transitions, 350 flow [2023-08-24 15:53:26,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 166 transitions, 350 flow [2023-08-24 15:53:26,231 INFO L124 PetriNetUnfolderBase]: 15/166 cut-off events. [2023-08-24 15:53:26,231 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:53:26,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 15/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 212 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 130. Up to 2 conditions per place. [2023-08-24 15:53:26,237 INFO L119 LiptonReduction]: Number of co-enabled transitions 3840 [2023-08-24 15:53:31,182 INFO L134 LiptonReduction]: Checked pairs total: 4334 [2023-08-24 15:53:31,182 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-24 15:53:31,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 15:53:31,199 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;@62059aa6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 15:53:31,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 15:53:31,205 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 15:53:31,205 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 15:53:31,205 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:53:31,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:31,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:31,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:31,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 633398818, now seen corresponding path program 1 times [2023-08-24 15:53:31,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:31,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56122567] [2023-08-24 15:53:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:31,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:31,905 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 15:53:31,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:31,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56122567] [2023-08-24 15:53:31,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56122567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:53:31,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:53:31,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 15:53:31,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989048782] [2023-08-24 15:53:31,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:53:31,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 15:53:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:31,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 15:53:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 15:53:31,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 348 [2023-08-24 15:53:31,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 15:53:31,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:31,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 348 [2023-08-24 15:53:31,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:32,128 INFO L124 PetriNetUnfolderBase]: 753/1007 cut-off events. [2023-08-24 15:53:32,129 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-24 15:53:32,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 1007 events. 753/1007 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3530 event pairs, 95 based on Foata normal form. 1/577 useless extension candidates. Maximal degree in co-relation 1735. Up to 824 conditions per place. [2023-08-24 15:53:32,139 INFO L140 encePairwiseOnDemand]: 341/348 looper letters, 38 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2023-08-24 15:53:32,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 211 flow [2023-08-24 15:53:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:53:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:53:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-24 15:53:32,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779693486590038 [2023-08-24 15:53:32,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-24 15:53:32,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-24 15:53:32,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:32,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-24 15:53:32,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 15:53:32,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 15:53:32,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 15:53:32,177 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 499 transitions. [2023-08-24 15:53:32,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 211 flow [2023-08-24 15:53:32,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 46 transitions, 189 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 15:53:32,185 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 92 flow [2023-08-24 15:53:32,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-08-24 15:53:32,189 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-24 15:53:32,189 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 92 flow [2023-08-24 15:53:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 15:53:32,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:32,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:32,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 15:53:32,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:32,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:32,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1182510978, now seen corresponding path program 1 times [2023-08-24 15:53:32,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:32,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197916275] [2023-08-24 15:53:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:32,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:32,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:32,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197916275] [2023-08-24 15:53:32,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197916275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:53:32,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:53:32,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 15:53:32,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525871606] [2023-08-24 15:53:32,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:53:32,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:53:32,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:53:32,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:53:32,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 348 [2023-08-24 15:53:32,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 15:53:32,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:32,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 348 [2023-08-24 15:53:32,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:32,590 INFO L124 PetriNetUnfolderBase]: 772/1044 cut-off events. [2023-08-24 15:53:32,590 INFO L125 PetriNetUnfolderBase]: For 212/214 co-relation queries the response was YES. [2023-08-24 15:53:32,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 1044 events. 772/1044 cut-off events. For 212/214 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3797 event pairs, 383 based on Foata normal form. 1/851 useless extension candidates. Maximal degree in co-relation 499. Up to 1040 conditions per place. [2023-08-24 15:53:32,597 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 28 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-24 15:53:32,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 154 flow [2023-08-24 15:53:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:53:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:53:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-08-24 15:53:32,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118773946360153 [2023-08-24 15:53:32,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-08-24 15:53:32,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-08-24 15:53:32,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:32,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-08-24 15:53:32,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states 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 15:53:32,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 15:53:32,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 15:53:32,606 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 92 flow. Second operand 3 states and 430 transitions. [2023-08-24 15:53:32,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 154 flow [2023-08-24 15:53:32,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 15:53:32,608 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 100 flow [2023-08-24 15:53:32,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-08-24 15:53:32,609 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-24 15:53:32,609 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 100 flow [2023-08-24 15:53:32,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 15:53:32,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:32,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:32,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 15:53:32,614 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:32,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:32,620 INFO L85 PathProgramCache]: Analyzing trace with hash 938378252, now seen corresponding path program 1 times [2023-08-24 15:53:32,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:32,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185645856] [2023-08-24 15:53:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:32,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:32,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:32,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185645856] [2023-08-24 15:53:32,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185645856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:32,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372831271] [2023-08-24 15:53:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:32,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:32,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:32,838 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 15:53:32,839 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 15:53:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:32,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 15:53:32,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:33,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:33,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372831271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:53:33,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:53:33,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-24 15:53:33,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080673337] [2023-08-24 15:53:33,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:53:33,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:53:33,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:53:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:53:33,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 348 [2023-08-24 15:53:33,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 137.46153846153845) internal successors, (1787), 13 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states 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 15:53:33,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:33,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 348 [2023-08-24 15:53:33,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:33,699 INFO L124 PetriNetUnfolderBase]: 1451/1990 cut-off events. [2023-08-24 15:53:33,699 INFO L125 PetriNetUnfolderBase]: For 432/434 co-relation queries the response was YES. [2023-08-24 15:53:33,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 1990 events. 1451/1990 cut-off events. For 432/434 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8410 event pairs, 642 based on Foata normal form. 66/1680 useless extension candidates. Maximal degree in co-relation 4622. Up to 1040 conditions per place. [2023-08-24 15:53:33,710 INFO L140 encePairwiseOnDemand]: 342/348 looper letters, 65 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2023-08-24 15:53:33,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 73 transitions, 364 flow [2023-08-24 15:53:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:53:33,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:53:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 869 transitions. [2023-08-24 15:53:33,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41618773946360155 [2023-08-24 15:53:33,713 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 869 transitions. [2023-08-24 15:53:33,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 869 transitions. [2023-08-24 15:53:33,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:33,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 869 transitions. [2023-08-24 15:53:33,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 15:53:33,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 15:53:33,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 15:53:33,720 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 100 flow. Second operand 6 states and 869 transitions. [2023-08-24 15:53:33,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 73 transitions, 364 flow [2023-08-24 15:53:33,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 73 transitions, 360 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 15:53:33,724 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 142 flow [2023-08-24 15:53:33,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-24 15:53:33,725 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-08-24 15:53:33,725 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 142 flow [2023-08-24 15:53:33,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 137.46153846153845) internal successors, (1787), 13 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states 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 15:53:33,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:33,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:33,735 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 15:53:33,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:33,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:33,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1086963879, now seen corresponding path program 1 times [2023-08-24 15:53:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623947709] [2023-08-24 15:53:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:33,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:34,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:34,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623947709] [2023-08-24 15:53:34,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623947709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:34,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150822320] [2023-08-24 15:53:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:34,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:34,060 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 15:53:34,071 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 15:53:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:34,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 15:53:34,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:34,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:34,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150822320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:53:34,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:53:34,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 15:53:34,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598412845] [2023-08-24 15:53:34,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:53:34,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 15:53:34,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:34,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 15:53:34,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-24 15:53:34,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 348 [2023-08-24 15:53:34,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 142 flow. Second operand has 12 states, 12 states have (on average 140.58333333333334) internal successors, (1687), 12 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states 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 15:53:34,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:34,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 348 [2023-08-24 15:53:34,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:34,456 INFO L124 PetriNetUnfolderBase]: 945/1384 cut-off events. [2023-08-24 15:53:34,457 INFO L125 PetriNetUnfolderBase]: For 643/725 co-relation queries the response was YES. [2023-08-24 15:53:34,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3512 conditions, 1384 events. 945/1384 cut-off events. For 643/725 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6087 event pairs, 439 based on Foata normal form. 88/1236 useless extension candidates. Maximal degree in co-relation 2475. Up to 951 conditions per place. [2023-08-24 15:53:34,465 INFO L140 encePairwiseOnDemand]: 341/348 looper letters, 57 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-08-24 15:53:34,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 66 transitions, 354 flow [2023-08-24 15:53:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:53:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:53:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 888 transitions. [2023-08-24 15:53:34,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2023-08-24 15:53:34,468 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 888 transitions. [2023-08-24 15:53:34,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 888 transitions. [2023-08-24 15:53:34,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:34,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 888 transitions. [2023-08-24 15:53:34,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states 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 15:53:34,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 15:53:34,474 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 15:53:34,474 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 142 flow. Second operand 6 states and 888 transitions. [2023-08-24 15:53:34,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 66 transitions, 354 flow [2023-08-24 15:53:34,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 66 transitions, 344 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 15:53:34,476 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 161 flow [2023-08-24 15:53:34,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-24 15:53:34,477 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2023-08-24 15:53:34,477 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 161 flow [2023-08-24 15:53:34,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.58333333333334) internal successors, (1687), 12 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states 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 15:53:34,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:34,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:34,488 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 15:53:34,683 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,SelfDestructingSolverStorable3 [2023-08-24 15:53:34,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:34,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:34,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1130483808, now seen corresponding path program 2 times [2023-08-24 15:53:34,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:34,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810446937] [2023-08-24 15:53:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:34,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:34,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:34,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810446937] [2023-08-24 15:53:34,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810446937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:34,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146047995] [2023-08-24 15:53:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:53:34,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:34,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:34,812 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 15:53:34,819 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 15:53:34,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:53:34,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:53:34,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 15:53:34,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:34,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:35,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146047995] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:35,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:53:35,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-08-24 15:53:35,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404513569] [2023-08-24 15:53:35,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:53:35,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 15:53:35,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 15:53:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:53:35,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 348 [2023-08-24 15:53:35,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 161 flow. Second operand has 6 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states 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 15:53:35,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:35,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 348 [2023-08-24 15:53:35,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:35,272 INFO L124 PetriNetUnfolderBase]: 1008/1427 cut-off events. [2023-08-24 15:53:35,273 INFO L125 PetriNetUnfolderBase]: For 1075/1147 co-relation queries the response was YES. [2023-08-24 15:53:35,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 1427 events. 1008/1427 cut-off events. For 1075/1147 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6003 event pairs, 361 based on Foata normal form. 69/1291 useless extension candidates. Maximal degree in co-relation 2874. Up to 596 conditions per place. [2023-08-24 15:53:35,282 INFO L140 encePairwiseOnDemand]: 340/348 looper letters, 58 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2023-08-24 15:53:35,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 70 transitions, 397 flow [2023-08-24 15:53:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:53:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:53:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 890 transitions. [2023-08-24 15:53:35,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42624521072796934 [2023-08-24 15:53:35,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 890 transitions. [2023-08-24 15:53:35,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 890 transitions. [2023-08-24 15:53:35,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:35,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 890 transitions. [2023-08-24 15:53:35,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.33333333333334) internal successors, (890), 6 states have internal predecessors, (890), 0 states have call successors, (0), 0 states 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 15:53:35,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 15:53:35,290 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 15:53:35,290 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 161 flow. Second operand 6 states and 890 transitions. [2023-08-24 15:53:35,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 70 transitions, 397 flow [2023-08-24 15:53:35,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 390 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 15:53:35,294 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 199 flow [2023-08-24 15:53:35,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=199, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-24 15:53:35,295 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2023-08-24 15:53:35,295 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 199 flow [2023-08-24 15:53:35,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states 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 15:53:35,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:35,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:35,308 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 15:53:35,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:35,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:35,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash -118350411, now seen corresponding path program 1 times [2023-08-24 15:53:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:35,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275955343] [2023-08-24 15:53:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:35,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:35,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275955343] [2023-08-24 15:53:35,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275955343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:35,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135290622] [2023-08-24 15:53:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:35,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:35,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:35,803 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 15:53:35,806 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 15:53:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:35,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 15:53:35,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:35,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135290622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:53:36,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:53:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-24 15:53:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49985073] [2023-08-24 15:53:36,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:53:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 15:53:36,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:36,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 15:53:36,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-08-24 15:53:36,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 348 [2023-08-24 15:53:36,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 199 flow. Second operand has 14 states, 14 states have (on average 135.71428571428572) internal successors, (1900), 14 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states 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 15:53:36,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:36,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 348 [2023-08-24 15:53:36,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:36,302 INFO L124 PetriNetUnfolderBase]: 706/1020 cut-off events. [2023-08-24 15:53:36,303 INFO L125 PetriNetUnfolderBase]: For 1638/1836 co-relation queries the response was YES. [2023-08-24 15:53:36,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 1020 events. 706/1020 cut-off events. For 1638/1836 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3735 event pairs, 401 based on Foata normal form. 198/1163 useless extension candidates. Maximal degree in co-relation 2752. Up to 846 conditions per place. [2023-08-24 15:53:36,308 INFO L140 encePairwiseOnDemand]: 342/348 looper letters, 31 selfloop transitions, 3 changer transitions 26/61 dead transitions. [2023-08-24 15:53:36,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 379 flow [2023-08-24 15:53:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 15:53:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 15:53:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 853 transitions. [2023-08-24 15:53:36,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085249042145594 [2023-08-24 15:53:36,311 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 853 transitions. [2023-08-24 15:53:36,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 853 transitions. [2023-08-24 15:53:36,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:36,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 853 transitions. [2023-08-24 15:53:36,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 142.16666666666666) internal successors, (853), 6 states have internal predecessors, (853), 0 states have call successors, (0), 0 states 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 15:53:36,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 15:53:36,316 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 15:53:36,316 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 199 flow. Second operand 6 states and 853 transitions. [2023-08-24 15:53:36,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 379 flow [2023-08-24 15:53:36,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 366 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-24 15:53:36,321 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 168 flow [2023-08-24 15:53:36,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-24 15:53:36,323 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2023-08-24 15:53:36,323 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 168 flow [2023-08-24 15:53:36,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 135.71428571428572) internal successors, (1900), 14 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states 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 15:53:36,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:36,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:36,332 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 15:53:36,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:36,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:36,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2121996383, now seen corresponding path program 2 times [2023-08-24 15:53:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204817694] [2023-08-24 15:53:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:36,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:36,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204817694] [2023-08-24 15:53:36,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204817694] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:36,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099727056] [2023-08-24 15:53:36,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:53:36,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:36,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:36,709 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 15:53:36,729 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 15:53:36,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:53:36,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:53:36,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:53:36,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:36,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:37,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099727056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:53:37,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:53:37,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-24 15:53:37,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404913718] [2023-08-24 15:53:37,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:53:37,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:53:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:53:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:53:37,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 348 [2023-08-24 15:53:37,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 168 flow. Second operand has 17 states, 17 states have (on average 130.41176470588235) internal successors, (2217), 17 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states 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 15:53:37,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:37,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 348 [2023-08-24 15:53:37,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:37,405 INFO L124 PetriNetUnfolderBase]: 947/1306 cut-off events. [2023-08-24 15:53:37,406 INFO L125 PetriNetUnfolderBase]: For 2521/2711 co-relation queries the response was YES. [2023-08-24 15:53:37,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4523 conditions, 1306 events. 947/1306 cut-off events. For 2521/2711 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4845 event pairs, 242 based on Foata normal form. 204/1422 useless extension candidates. Maximal degree in co-relation 4498. Up to 715 conditions per place. [2023-08-24 15:53:37,415 INFO L140 encePairwiseOnDemand]: 338/348 looper letters, 75 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2023-08-24 15:53:37,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 610 flow [2023-08-24 15:53:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:53:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:53:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1224 transitions. [2023-08-24 15:53:37,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2023-08-24 15:53:37,419 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1224 transitions. [2023-08-24 15:53:37,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1224 transitions. [2023-08-24 15:53:37,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:37,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1224 transitions. [2023-08-24 15:53:37,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.0) internal successors, (1224), 9 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 15:53:37,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 348.0) internal successors, (3480), 10 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states 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 15:53:37,428 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 348.0) internal successors, (3480), 10 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states 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 15:53:37,428 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 168 flow. Second operand 9 states and 1224 transitions. [2023-08-24 15:53:37,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 610 flow [2023-08-24 15:53:37,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 88 transitions, 524 flow, removed 40 selfloop flow, removed 8 redundant places. [2023-08-24 15:53:37,437 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 206 flow [2023-08-24 15:53:37,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-08-24 15:53:37,438 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2023-08-24 15:53:37,439 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 206 flow [2023-08-24 15:53:37,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 130.41176470588235) internal successors, (2217), 17 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states 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 15:53:37,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:37,442 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:37,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 15:53:37,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:37,652 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:37,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash -920815075, now seen corresponding path program 3 times [2023-08-24 15:53:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:37,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583850583] [2023-08-24 15:53:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:37,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:37,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:37,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583850583] [2023-08-24 15:53:37,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583850583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:37,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210065198] [2023-08-24 15:53:37,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:53:37,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:37,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:37,791 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 15:53:37,793 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 15:53:37,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:53:37,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:53:37,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:53:37,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:37,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210065198] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:38,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:53:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 16 [2023-08-24 15:53:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569732789] [2023-08-24 15:53:38,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:53:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:53:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:53:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:53:38,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 348 [2023-08-24 15:53:38,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 130.875) internal successors, (1047), 8 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 15:53:38,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:38,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 348 [2023-08-24 15:53:38,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:38,453 INFO L124 PetriNetUnfolderBase]: 1354/1861 cut-off events. [2023-08-24 15:53:38,453 INFO L125 PetriNetUnfolderBase]: For 2957/3187 co-relation queries the response was YES. [2023-08-24 15:53:38,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6330 conditions, 1861 events. 1354/1861 cut-off events. For 2957/3187 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7047 event pairs, 292 based on Foata normal form. 242/2103 useless extension candidates. Maximal degree in co-relation 6297. Up to 877 conditions per place. [2023-08-24 15:53:38,463 INFO L140 encePairwiseOnDemand]: 338/348 looper letters, 98 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2023-08-24 15:53:38,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 127 transitions, 882 flow [2023-08-24 15:53:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:53:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:53:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1372 transitions. [2023-08-24 15:53:38,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39425287356321836 [2023-08-24 15:53:38,468 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1372 transitions. [2023-08-24 15:53:38,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1372 transitions. [2023-08-24 15:53:38,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:38,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1372 transitions. [2023-08-24 15:53:38,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 137.2) internal successors, (1372), 10 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states 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 15:53:38,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 348.0) internal successors, (3828), 11 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states 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 15:53:38,476 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 348.0) internal successors, (3828), 11 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states 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 15:53:38,476 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 206 flow. Second operand 10 states and 1372 transitions. [2023-08-24 15:53:38,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 127 transitions, 882 flow [2023-08-24 15:53:38,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 127 transitions, 859 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-24 15:53:38,482 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 379 flow [2023-08-24 15:53:38,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=379, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-08-24 15:53:38,485 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2023-08-24 15:53:38,485 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 379 flow [2023-08-24 15:53:38,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.875) internal successors, (1047), 8 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 15:53:38,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:38,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:38,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 15:53:38,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:38,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:38,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:38,695 INFO L85 PathProgramCache]: Analyzing trace with hash -406405297, now seen corresponding path program 4 times [2023-08-24 15:53:38,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:38,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775685330] [2023-08-24 15:53:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:38,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:38,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775685330] [2023-08-24 15:53:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775685330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544741873] [2023-08-24 15:53:38,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:53:38,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:38,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:38,852 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 15:53:38,855 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 15:53:38,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:53:38,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:53:38,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:53:38,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:39,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:39,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544741873] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:53:39,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:53:39,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-08-24 15:53:39,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198557859] [2023-08-24 15:53:39,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:53:39,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:53:39,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:39,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:53:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:53:39,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 348 [2023-08-24 15:53:39,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 379 flow. Second operand has 18 states, 18 states have (on average 130.72222222222223) internal successors, (2353), 18 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states 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 15:53:39,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:39,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 348 [2023-08-24 15:53:39,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:39,852 INFO L124 PetriNetUnfolderBase]: 1754/2409 cut-off events. [2023-08-24 15:53:39,852 INFO L125 PetriNetUnfolderBase]: For 6365/6661 co-relation queries the response was YES. [2023-08-24 15:53:39,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9856 conditions, 2409 events. 1754/2409 cut-off events. For 6365/6661 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9642 event pairs, 424 based on Foata normal form. 310/2719 useless extension candidates. Maximal degree in co-relation 9819. Up to 1431 conditions per place. [2023-08-24 15:53:39,877 INFO L140 encePairwiseOnDemand]: 336/348 looper letters, 114 selfloop transitions, 52 changer transitions 0/167 dead transitions. [2023-08-24 15:53:39,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 167 transitions, 1351 flow [2023-08-24 15:53:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:53:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:53:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1645 transitions. [2023-08-24 15:53:39,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939176245210728 [2023-08-24 15:53:39,882 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1645 transitions. [2023-08-24 15:53:39,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1645 transitions. [2023-08-24 15:53:39,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:39,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1645 transitions. [2023-08-24 15:53:39,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 137.08333333333334) internal successors, (1645), 12 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states 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 15:53:39,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 348.0) internal successors, (4524), 13 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 15:53:39,892 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 348.0) internal successors, (4524), 13 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states 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 15:53:39,892 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 379 flow. Second operand 12 states and 1645 transitions. [2023-08-24 15:53:39,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 167 transitions, 1351 flow [2023-08-24 15:53:39,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 167 transitions, 1290 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-08-24 15:53:39,927 INFO L231 Difference]: Finished difference. Result has 69 places, 92 transitions, 800 flow [2023-08-24 15:53:39,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=69, PETRI_TRANSITIONS=92} [2023-08-24 15:53:39,928 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2023-08-24 15:53:39,928 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 92 transitions, 800 flow [2023-08-24 15:53:39,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 130.72222222222223) internal successors, (2353), 18 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states 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 15:53:39,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:39,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:39,937 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 15:53:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:40,134 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:40,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1150045141, now seen corresponding path program 5 times [2023-08-24 15:53:40,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:40,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252538961] [2023-08-24 15:53:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:40,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:40,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:40,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252538961] [2023-08-24 15:53:40,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252538961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:40,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582285880] [2023-08-24 15:53:40,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:53:40,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:40,294 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 15:53:40,312 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 15:53:40,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:53:40,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:53:40,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:53:40,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:53:40,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:53:40,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582285880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:53:40,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:53:40,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-08-24 15:53:40,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071404856] [2023-08-24 15:53:40,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:53:40,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:53:40,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:53:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:53:40,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 348 [2023-08-24 15:53:40,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 92 transitions, 800 flow. Second operand has 15 states, 15 states have (on average 124.46666666666667) internal successors, (1867), 15 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states 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 15:53:40,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:40,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 348 [2023-08-24 15:53:40,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:41,497 INFO L124 PetriNetUnfolderBase]: 2102/2900 cut-off events. [2023-08-24 15:53:41,497 INFO L125 PetriNetUnfolderBase]: For 10947/10947 co-relation queries the response was YES. [2023-08-24 15:53:41,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13832 conditions, 2900 events. 2102/2900 cut-off events. For 10947/10947 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11664 event pairs, 141 based on Foata normal form. 16/2916 useless extension candidates. Maximal degree in co-relation 13788. Up to 1091 conditions per place. [2023-08-24 15:53:41,522 INFO L140 encePairwiseOnDemand]: 334/348 looper letters, 171 selfloop transitions, 148 changer transitions 0/319 dead transitions. [2023-08-24 15:53:41,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 319 transitions, 3081 flow [2023-08-24 15:53:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 15:53:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 15:53:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2999 transitions. [2023-08-24 15:53:41,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.374687656171914 [2023-08-24 15:53:41,564 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2999 transitions. [2023-08-24 15:53:41,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2999 transitions. [2023-08-24 15:53:41,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:41,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2999 transitions. [2023-08-24 15:53:41,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 130.3913043478261) internal successors, (2999), 23 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states 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 15:53:41,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 348.0) internal successors, (8352), 24 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states 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 15:53:41,593 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 348.0) internal successors, (8352), 24 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states 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 15:53:41,593 INFO L175 Difference]: Start difference. First operand has 69 places, 92 transitions, 800 flow. Second operand 23 states and 2999 transitions. [2023-08-24 15:53:41,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 319 transitions, 3081 flow [2023-08-24 15:53:41,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 319 transitions, 2954 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-08-24 15:53:41,691 INFO L231 Difference]: Finished difference. Result has 92 places, 192 transitions, 2087 flow [2023-08-24 15:53:41,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2087, PETRI_PLACES=92, PETRI_TRANSITIONS=192} [2023-08-24 15:53:41,692 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2023-08-24 15:53:41,692 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 192 transitions, 2087 flow [2023-08-24 15:53:41,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 124.46666666666667) internal successors, (1867), 15 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states 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 15:53:41,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:41,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:41,705 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 15:53:41,897 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,SelfDestructingSolverStorable9 [2023-08-24 15:53:41,898 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:41,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash 449867203, now seen corresponding path program 6 times [2023-08-24 15:53:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:41,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51745763] [2023-08-24 15:53:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:41,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51745763] [2023-08-24 15:53:42,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51745763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228681414] [2023-08-24 15:53:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:53:42,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:42,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:42,045 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 15:53:42,093 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 15:53:42,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:53:42,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:53:42,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:53:42,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:42,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:42,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228681414] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:42,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:53:42,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 18 [2023-08-24 15:53:42,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756504442] [2023-08-24 15:53:42,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:53:42,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:53:42,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:42,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:53:42,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:53:42,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 348 [2023-08-24 15:53:42,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 192 transitions, 2087 flow. Second operand has 8 states, 8 states have (on average 130.875) internal successors, (1047), 8 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 15:53:42,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:42,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 348 [2023-08-24 15:53:42,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:42,919 INFO L124 PetriNetUnfolderBase]: 2028/2793 cut-off events. [2023-08-24 15:53:42,919 INFO L125 PetriNetUnfolderBase]: For 11641/11686 co-relation queries the response was YES. [2023-08-24 15:53:42,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14579 conditions, 2793 events. 2028/2793 cut-off events. For 11641/11686 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11055 event pairs, 350 based on Foata normal form. 59/2851 useless extension candidates. Maximal degree in co-relation 14528. Up to 1419 conditions per place. [2023-08-24 15:53:42,937 INFO L140 encePairwiseOnDemand]: 338/348 looper letters, 169 selfloop transitions, 81 changer transitions 0/259 dead transitions. [2023-08-24 15:53:42,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 259 transitions, 2958 flow [2023-08-24 15:53:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:53:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:53:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1374 transitions. [2023-08-24 15:53:42,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39482758620689656 [2023-08-24 15:53:42,941 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1374 transitions. [2023-08-24 15:53:42,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1374 transitions. [2023-08-24 15:53:42,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:42,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1374 transitions. [2023-08-24 15:53:42,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 137.4) internal successors, (1374), 10 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states 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 15:53:42,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 348.0) internal successors, (3828), 11 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states 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 15:53:42,948 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 348.0) internal successors, (3828), 11 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states 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 15:53:42,949 INFO L175 Difference]: Start difference. First operand has 92 places, 192 transitions, 2087 flow. Second operand 10 states and 1374 transitions. [2023-08-24 15:53:42,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 259 transitions, 2958 flow [2023-08-24 15:53:43,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 259 transitions, 2867 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-08-24 15:53:43,026 INFO L231 Difference]: Finished difference. Result has 96 places, 191 transitions, 2148 flow [2023-08-24 15:53:43,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2148, PETRI_PLACES=96, PETRI_TRANSITIONS=191} [2023-08-24 15:53:43,027 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2023-08-24 15:53:43,027 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 191 transitions, 2148 flow [2023-08-24 15:53:43,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.875) internal successors, (1047), 8 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 15:53:43,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:43,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:43,033 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 15:53:43,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:43,233 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:43,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash 254297689, now seen corresponding path program 7 times [2023-08-24 15:53:43,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:43,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772148431] [2023-08-24 15:53:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:43,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:43,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772148431] [2023-08-24 15:53:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772148431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348210876] [2023-08-24 15:53:43,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:53:43,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:43,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:43,390 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 15:53:43,415 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 15:53:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:43,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:53:43,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:43,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:53:43,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348210876] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:43,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:53:43,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 18 [2023-08-24 15:53:43,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040630655] [2023-08-24 15:53:43,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:53:43,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:53:43,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:53:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:53:43,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 348 [2023-08-24 15:53:43,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 191 transitions, 2148 flow. Second operand has 8 states, 8 states have (on average 130.875) internal successors, (1047), 8 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 15:53:43,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:43,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 348 [2023-08-24 15:53:43,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:44,162 INFO L124 PetriNetUnfolderBase]: 2004/2750 cut-off events. [2023-08-24 15:53:44,162 INFO L125 PetriNetUnfolderBase]: For 12619/12661 co-relation queries the response was YES. [2023-08-24 15:53:44,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14836 conditions, 2750 events. 2004/2750 cut-off events. For 12619/12661 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10768 event pairs, 283 based on Foata normal form. 56/2805 useless extension candidates. Maximal degree in co-relation 14785. Up to 1068 conditions per place. [2023-08-24 15:53:44,179 INFO L140 encePairwiseOnDemand]: 338/348 looper letters, 116 selfloop transitions, 114 changer transitions 0/238 dead transitions. [2023-08-24 15:53:44,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 238 transitions, 2823 flow [2023-08-24 15:53:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:53:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:53:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1237 transitions. [2023-08-24 15:53:44,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949553001277139 [2023-08-24 15:53:44,183 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1237 transitions. [2023-08-24 15:53:44,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1237 transitions. [2023-08-24 15:53:44,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:44,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1237 transitions. [2023-08-24 15:53:44,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.44444444444446) internal successors, (1237), 9 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states 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 15:53:44,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 348.0) internal successors, (3480), 10 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states 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 15:53:44,191 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 348.0) internal successors, (3480), 10 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states 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 15:53:44,191 INFO L175 Difference]: Start difference. First operand has 96 places, 191 transitions, 2148 flow. Second operand 9 states and 1237 transitions. [2023-08-24 15:53:44,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 238 transitions, 2823 flow [2023-08-24 15:53:44,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 238 transitions, 2785 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-24 15:53:44,269 INFO L231 Difference]: Finished difference. Result has 98 places, 187 transitions, 2294 flow [2023-08-24 15:53:44,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2294, PETRI_PLACES=98, PETRI_TRANSITIONS=187} [2023-08-24 15:53:44,270 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 66 predicate places. [2023-08-24 15:53:44,270 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 187 transitions, 2294 flow [2023-08-24 15:53:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.875) internal successors, (1047), 8 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 15:53:44,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:44,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:44,279 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 15:53:44,475 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,SelfDestructingSolverStorable11 [2023-08-24 15:53:44,475 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:44,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:44,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1850337577, now seen corresponding path program 1 times [2023-08-24 15:53:44,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:44,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5930656] [2023-08-24 15:53:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:44,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:53:44,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:44,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5930656] [2023-08-24 15:53:44,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5930656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:53:44,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:53:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 15:53:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127847019] [2023-08-24 15:53:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:53:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 15:53:44,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 15:53:44,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 15:53:44,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 348 [2023-08-24 15:53:44,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 187 transitions, 2294 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 15:53:44,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:44,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 348 [2023-08-24 15:53:44,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:53:44,849 INFO L124 PetriNetUnfolderBase]: 1871/2603 cut-off events. [2023-08-24 15:53:44,849 INFO L125 PetriNetUnfolderBase]: For 17412/17922 co-relation queries the response was YES. [2023-08-24 15:53:44,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15153 conditions, 2603 events. 1871/2603 cut-off events. For 17412/17922 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11322 event pairs, 449 based on Foata normal form. 306/2826 useless extension candidates. Maximal degree in co-relation 15101. Up to 1623 conditions per place. [2023-08-24 15:53:44,868 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 230 selfloop transitions, 3 changer transitions 0/260 dead transitions. [2023-08-24 15:53:44,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 260 transitions, 3654 flow [2023-08-24 15:53:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:53:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:53:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-24 15:53:44,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2023-08-24 15:53:44,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-24 15:53:44,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-24 15:53:44,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:53:44,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-24 15:53:44,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 15:53:44,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 15:53:44,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states 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 15:53:44,873 INFO L175 Difference]: Start difference. First operand has 98 places, 187 transitions, 2294 flow. Second operand 3 states and 516 transitions. [2023-08-24 15:53:44,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 260 transitions, 3654 flow [2023-08-24 15:53:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 260 transitions, 3530 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 15:53:44,924 INFO L231 Difference]: Finished difference. Result has 95 places, 187 transitions, 2207 flow [2023-08-24 15:53:44,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2207, PETRI_PLACES=95, PETRI_TRANSITIONS=187} [2023-08-24 15:53:44,925 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 63 predicate places. [2023-08-24 15:53:44,925 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 187 transitions, 2207 flow [2023-08-24 15:53:44,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 15:53:44,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:53:44,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:53:44,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 15:53:44,925 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:53:44,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:53:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1026262699, now seen corresponding path program 1 times [2023-08-24 15:53:44,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:53:44,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635465366] [2023-08-24 15:53:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:44,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:53:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:46,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:53:46,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635465366] [2023-08-24 15:53:46,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635465366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:53:46,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490376807] [2023-08-24 15:53:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:53:46,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:53:46,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:53:46,845 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 15:53:46,846 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 15:53:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:53:46,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 15:53:46,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:53:47,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:53:47,253 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 14 treesize of output 16 [2023-08-24 15:53:47,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:53:47,421 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 14 treesize of output 16 [2023-08-24 15:53:47,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:53:47,698 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:53:47,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 52 [2023-08-24 15:53:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:47,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:53:55,308 WARN L234 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:53:57,869 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:53:57,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 179 [2023-08-24 15:53:57,894 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:53:57,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 121 [2023-08-24 15:53:57,917 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:53:57,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2023-08-24 15:53:58,243 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:53:58,244 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:53:58,251 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-08-24 15:53:58,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 1 [2023-08-24 15:53:58,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:53:58,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:53:58,258 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:53:58,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 3 [2023-08-24 15:53:58,266 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:53:58,266 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:53:58,270 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:53:58,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 3 [2023-08-24 15:53:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:53:58,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490376807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:53:58,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:53:58,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-08-24 15:53:58,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665918228] [2023-08-24 15:53:58,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:53:58,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 15:53:58,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:53:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 15:53:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1623, Unknown=11, NotChecked=0, Total=1806 [2023-08-24 15:53:58,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 348 [2023-08-24 15:53:58,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 187 transitions, 2207 flow. Second operand has 43 states, 43 states have (on average 86.74418604651163) internal successors, (3730), 43 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states 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 15:53:58,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:53:58,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 348 [2023-08-24 15:53:58,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:54:36,202 WARN L234 SmtUtils]: Spent 22.39s on a formula simplification. DAG size of input: 127 DAG size of output: 119 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:55:01,763 WARN L234 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 153 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:55:10,560 WARN L234 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 122 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:55:32,533 WARN L234 SmtUtils]: Spent 21.56s on a formula simplification. DAG size of input: 156 DAG size of output: 130 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:55:42,809 WARN L234 SmtUtils]: Spent 8.73s on a formula simplification. DAG size of input: 158 DAG size of output: 117 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:55:49,607 WARN L234 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 127 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:56:02,099 WARN L234 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 128 DAG size of output: 121 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:56:02,482 INFO L124 PetriNetUnfolderBase]: 5373/7612 cut-off events. [2023-08-24 15:56:02,482 INFO L125 PetriNetUnfolderBase]: For 40588/40588 co-relation queries the response was YES. [2023-08-24 15:56:02,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41129 conditions, 7612 events. 5373/7612 cut-off events. For 40588/40588 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 37465 event pairs, 257 based on Foata normal form. 6/7618 useless extension candidates. Maximal degree in co-relation 41078. Up to 3114 conditions per place. [2023-08-24 15:56:02,531 INFO L140 encePairwiseOnDemand]: 332/348 looper letters, 718 selfloop transitions, 477 changer transitions 36/1231 dead transitions. [2023-08-24 15:56:02,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 1231 transitions, 14390 flow [2023-08-24 15:56:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-24 15:56:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-24 15:56:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6614 transitions. [2023-08-24 15:56:02,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2676865792455885 [2023-08-24 15:56:02,545 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6614 transitions. [2023-08-24 15:56:02,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6614 transitions. [2023-08-24 15:56:02,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:56:02,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6614 transitions. [2023-08-24 15:56:02,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 93.15492957746478) internal successors, (6614), 71 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states 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 15:56:02,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 348.0) internal successors, (25056), 72 states have internal predecessors, (25056), 0 states have call successors, (0), 0 states 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 15:56:02,585 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 348.0) internal successors, (25056), 72 states have internal predecessors, (25056), 0 states have call successors, (0), 0 states 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 15:56:02,585 INFO L175 Difference]: Start difference. First operand has 95 places, 187 transitions, 2207 flow. Second operand 71 states and 6614 transitions. [2023-08-24 15:56:02,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 1231 transitions, 14390 flow [2023-08-24 15:56:02,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 1231 transitions, 14384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 15:56:02,898 INFO L231 Difference]: Finished difference. Result has 192 places, 636 transitions, 9038 flow [2023-08-24 15:56:02,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=9038, PETRI_PLACES=192, PETRI_TRANSITIONS=636} [2023-08-24 15:56:02,898 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 160 predicate places. [2023-08-24 15:56:02,898 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 636 transitions, 9038 flow [2023-08-24 15:56:02,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 86.74418604651163) internal successors, (3730), 43 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states 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 15:56:02,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:56:02,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:56:02,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 15:56:03,105 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,SelfDestructingSolverStorable13 [2023-08-24 15:56:03,105 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 15:56:03,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:56:03,106 INFO L85 PathProgramCache]: Analyzing trace with hash 6549197, now seen corresponding path program 2 times [2023-08-24 15:56:03,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:56:03,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914571373] [2023-08-24 15:56:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:56:03,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:56:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:56:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:56:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914571373] [2023-08-24 15:56:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914571373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:56:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581711171] [2023-08-24 15:56:04,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:56:04,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:56:04,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:56:04,669 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 15:56:04,673 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 15:56:04,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:56:04,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:56:04,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 15:56:04,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:56:04,946 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 11 treesize of output 7 [2023-08-24 15:56:05,004 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 6 treesize of output 5 [2023-08-24 15:56:05,059 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 6 treesize of output 5 [2023-08-24 15:56:05,136 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 6 treesize of output 5 [2023-08-24 15:56:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:56:05,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:56:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:56:05,674 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:56:05,679 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:56:05,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 34 [2023-08-24 15:56:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:56:05,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:56:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:56:07,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581711171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:56:07,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:56:07,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 36 [2023-08-24 15:56:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458045715] [2023-08-24 15:56:07,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:56:07,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 15:56:07,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:56:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 15:56:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1169, Unknown=4, NotChecked=0, Total=1332 [2023-08-24 15:56:07,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 348 [2023-08-24 15:56:07,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 636 transitions, 9038 flow. Second operand has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states 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 15:56:07,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:56:07,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 348 [2023-08-24 15:56:07,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:56:32,423 WARN L234 SmtUtils]: Spent 24.92s on a formula simplification. DAG size of input: 146 DAG size of output: 117 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:56:51,321 WARN L234 SmtUtils]: Spent 18.45s on a formula simplification. DAG size of input: 110 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:57:09,749 WARN L234 SmtUtils]: Spent 16.48s on a formula simplification. DAG size of input: 86 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:57:42,645 WARN L234 SmtUtils]: Spent 32.83s on a formula simplification. DAG size of input: 114 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:58:04,633 WARN L234 SmtUtils]: Spent 20.65s on a formula simplification. DAG size of input: 90 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:58:46,960 WARN L234 SmtUtils]: Spent 42.23s on a formula simplification. DAG size of input: 111 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:58:55,849 WARN L234 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 131 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:59:06,129 WARN L234 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 123 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:59:31,011 WARN L234 SmtUtils]: Spent 24.69s on a formula simplification. DAG size of input: 87 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 15:59:48,238 WARN L234 SmtUtils]: Spent 16.68s on a formula simplification. DAG size of input: 119 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:00:01,376 WARN L234 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 136 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:00:08,970 WARN L234 SmtUtils]: Spent 6.73s on a formula simplification. DAG size of input: 128 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:00:26,973 WARN L234 SmtUtils]: Spent 16.37s on a formula simplification. DAG size of input: 95 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:00:42,210 WARN L234 SmtUtils]: Spent 14.76s on a formula simplification. DAG size of input: 133 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:01:16,797 WARN L234 SmtUtils]: Spent 34.33s on a formula simplification. DAG size of input: 123 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:01:19,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:01:38,296 WARN L234 SmtUtils]: Spent 16.61s on a formula simplification. DAG size of input: 121 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:01:55,471 WARN L234 SmtUtils]: Spent 16.95s on a formula simplification. DAG size of input: 138 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:02:39,381 WARN L234 SmtUtils]: Spent 43.71s on a formula simplification. DAG size of input: 132 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:02:55,386 WARN L234 SmtUtils]: Spent 14.49s on a formula simplification. DAG size of input: 123 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:03:16,723 WARN L234 SmtUtils]: Spent 20.94s on a formula simplification. DAG size of input: 146 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:03:48,233 WARN L234 SmtUtils]: Spent 30.72s on a formula simplification. DAG size of input: 120 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:04:00,712 WARN L234 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 97 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:04:50,635 WARN L234 SmtUtils]: Spent 49.65s on a formula simplification. DAG size of input: 137 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:05:05,713 WARN L234 SmtUtils]: Spent 14.81s on a formula simplification. DAG size of input: 140 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:05:14,689 WARN L234 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 127 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:05:51,806 WARN L234 SmtUtils]: Spent 36.73s on a formula simplification. DAG size of input: 133 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:06:07,182 WARN L234 SmtUtils]: Spent 14.85s on a formula simplification. DAG size of input: 135 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:06:24,244 WARN L234 SmtUtils]: Spent 16.90s on a formula simplification. DAG size of input: 150 DAG size of output: 110 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:06:33,096 WARN L234 SmtUtils]: Spent 8.53s on a formula simplification. DAG size of input: 134 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:06:52,473 WARN L234 SmtUtils]: Spent 19.21s on a formula simplification. DAG size of input: 151 DAG size of output: 124 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:07:09,475 WARN L234 SmtUtils]: Spent 16.78s on a formula simplification. DAG size of input: 148 DAG size of output: 120 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-24 16:07:44,239 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:07:44,246 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:07:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-24 16:07:45,241 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 16:07:45,252 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 16:07:45,440 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-24 16:07:45,442 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,SelfDestructingSolverStorable14 [2023-08-24 16:07:45,442 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateUnifier was unifying predicates,while executing Executor. [2023-08-24 16:07:45,443 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 16:07:45,444 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 16:07:45,444 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 16:07:45,444 INFO L445 BasicCegarLoop]: Path program histogram: [7, 2, 2, 1, 1, 1, 1] [2023-08-24 16:07:45,446 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 16:07:45,446 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 16:07:45,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 04:07:45 BasicIcfg [2023-08-24 16:07:45,450 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 16:07:45,451 INFO L158 Benchmark]: Toolchain (without parser) took 860394.57ms. Allocated memory was 331.4MB in the beginning and 614.5MB in the end (delta: 283.1MB). Free memory was 307.2MB in the beginning and 345.3MB in the end (delta: -38.1MB). Peak memory consumption was 247.7MB. Max. memory is 16.0GB. [2023-08-24 16:07:45,451 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 331.4MB. Free memory is still 308.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:07:45,451 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.62ms. Allocated memory is still 331.4MB. Free memory was 307.2MB in the beginning and 295.8MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 16:07:45,451 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.67ms. Allocated memory is still 331.4MB. Free memory was 295.8MB in the beginning and 293.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 16:07:45,451 INFO L158 Benchmark]: Boogie Preprocessor took 47.66ms. Allocated memory is still 331.4MB. Free memory was 293.7MB in the beginning and 292.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 16:07:45,452 INFO L158 Benchmark]: RCFGBuilder took 470.42ms. Allocated memory is still 331.4MB. Free memory was 292.2MB in the beginning and 274.4MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 16:07:45,452 INFO L158 Benchmark]: TraceAbstraction took 859579.97ms. Allocated memory was 331.4MB in the beginning and 614.5MB in the end (delta: 283.1MB). Free memory was 273.9MB in the beginning and 345.3MB in the end (delta: -71.4MB). Peak memory consumption was 214.2MB. Max. memory is 16.0GB. [2023-08-24 16:07:45,453 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 331.4MB. Free memory is still 308.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 238.62ms. Allocated memory is still 331.4MB. Free memory was 307.2MB in the beginning and 295.8MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.67ms. Allocated memory is still 331.4MB. Free memory was 295.8MB in the beginning and 293.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 47.66ms. Allocated memory is still 331.4MB. Free memory was 293.7MB in the beginning and 292.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 470.42ms. Allocated memory is still 331.4MB. Free memory was 292.2MB in the beginning and 274.4MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 859579.97ms. Allocated memory was 331.4MB in the beginning and 614.5MB in the end (delta: 283.1MB). Free memory was 273.9MB in the beginning and 345.3MB in the end (delta: -71.4MB). Peak memory consumption was 214.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.0s, 161 PlacesBefore, 32 PlacesAfterwards, 166 TransitionsBefore, 28 TransitionsAfterwards, 3840 CoEnabledTransitionPairs, 7 FixpointIterations, 73 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 23 ConcurrentYvCompositions, 9 ChoiceCompositions, 169 TotalNumberOfCompositions, 4334 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3909, independent: 3866, independent conditional: 0, independent unconditional: 3866, dependent: 43, dependent conditional: 0, dependent unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2253, independent: 2233, independent conditional: 0, independent unconditional: 2233, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3909, independent: 1633, independent conditional: 0, independent unconditional: 1633, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 2253, unknown conditional: 0, unknown unconditional: 2253] , Statistics on independence cache: Total cache size (in pairs): 94, Positive cache size: 88, Positive conditional cache size: 0, Positive unconditional cache size: 88, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 222 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 859.4s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 828.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.2s, HoareTripleCheckerStatistics: 189 mSolverCounterUnknown, 2379 SdHoareTripleChecker+Valid, 13.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2379 mSDsluCounter, 528 SdHoareTripleChecker+Invalid, 12.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 472 mSDsCounter, 263 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11636 IncrementalHoareTripleChecker+Invalid, 12088 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 263 mSolverCounterUnsat, 56 mSDtfsCounter, 11636 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 858 GetRequests, 421 SyntacticMatches, 14 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8710 ImplicationChecksByTransitivity, 790.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9038occurred in iteration=14, InterpolantAutomatonStates: 177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.3s InterpolantComputationTime, 635 NumberOfCodeBlocks, 635 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 881 ConstructedInterpolants, 9 QuantifiedInterpolants, 10478 SizeOfPredicates, 90 NumberOfNonLiveVariables, 2801 ConjunctsInSsa, 186 ConjunctsInUnsatCore, 39 InterpolantComputations, 7 PerfectInterpolantSequences, 68/138 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown