/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/parallel-misc-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:29:45,069 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:29:45,155 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 14:29:45,160 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:29:45,160 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:29:45,191 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:29:45,192 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:29:45,192 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:29:45,193 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:29:45,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:29:45,196 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:29:45,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:29:45,197 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:29:45,198 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:29:45,198 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:29:45,198 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:29:45,199 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:29:45,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:29:45,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:29:45,199 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:29:45,200 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:29:45,200 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:29:45,200 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:29:45,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:29:45,201 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:29:45,201 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:29:45,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:29:45,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:29:45,202 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:29:45,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:29:45,203 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:29:45,203 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:29:45,204 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:29:45,204 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:29:45,204 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:29:45,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:29:45,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:29:45,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:29:45,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:29:45,528 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:29:45,528 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:29:45,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-24 14:29:46,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:29:46,928 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:29:46,929 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-24 14:29:46,935 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3563a4a9f/caf4e7e66ced481c92ee89c00044bbaa/FLAG1b88f993c [2023-08-24 14:29:46,949 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3563a4a9f/caf4e7e66ced481c92ee89c00044bbaa [2023-08-24 14:29:46,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:29:46,955 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:29:46,958 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:29:46,958 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:29:46,960 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:29:46,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ab25cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:46, skipping insertion in model container [2023-08-24 14:29:46,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:29:46" (1/1) ... [2023-08-24 14:29:46,981 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:29:47,152 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/parallel-misc-2.wvr.c[2554,2567] [2023-08-24 14:29:47,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:29:47,162 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:29:47,196 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/parallel-misc-2.wvr.c[2554,2567] [2023-08-24 14:29:47,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:29:47,203 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:29:47,203 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:29:47,211 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:29:47,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47 WrapperNode [2023-08-24 14:29:47,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:29:47,213 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:29:47,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:29:47,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:29:47,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,252 INFO L138 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-08-24 14:29:47,253 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:29:47,253 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:29:47,253 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:29:47,254 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:29:47,261 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,265 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,265 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,279 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,282 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,283 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,285 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:29:47,286 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:29:47,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:29:47,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:29:47,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (1/1) ... [2023-08-24 14:29:47,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:29:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:47,317 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 14:29:47,342 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 14:29:47,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:29:47,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:29:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:29:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:29:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:29:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:29:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:29:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:29:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:29:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:29:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:29:47,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:29:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:29:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:29:47,360 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 14:29:47,433 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:29:47,435 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:29:47,595 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:29:47,622 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:29:47,622 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 14:29:47,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:29:47 BoogieIcfgContainer [2023-08-24 14:29:47,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:29:47,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:29:47,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:29:47,629 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:29:47,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:29:46" (1/3) ... [2023-08-24 14:29:47,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e5bc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:29:47, skipping insertion in model container [2023-08-24 14:29:47,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:29:47" (2/3) ... [2023-08-24 14:29:47,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e5bc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:29:47, skipping insertion in model container [2023-08-24 14:29:47,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:29:47" (3/3) ... [2023-08-24 14:29:47,631 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2023-08-24 14:29:47,644 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:29:47,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:29:47,644 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:29:47,701 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 14:29:47,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 103 transitions, 222 flow [2023-08-24 14:29:47,788 INFO L124 PetriNetUnfolderBase]: 8/101 cut-off events. [2023-08-24 14:29:47,788 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:29:47,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 101 events. 8/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2023-08-24 14:29:47,793 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 103 transitions, 222 flow [2023-08-24 14:29:47,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2023-08-24 14:29:47,799 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:29:47,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 93 transitions, 198 flow [2023-08-24 14:29:47,809 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 93 transitions, 198 flow [2023-08-24 14:29:47,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 93 transitions, 198 flow [2023-08-24 14:29:47,849 INFO L124 PetriNetUnfolderBase]: 8/93 cut-off events. [2023-08-24 14:29:47,850 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:29:47,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 8/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2023-08-24 14:29:47,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 728 [2023-08-24 14:29:50,269 INFO L134 LiptonReduction]: Checked pairs total: 789 [2023-08-24 14:29:50,269 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-24 14:29:50,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:29:50,293 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;@1357cff1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:29:50,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 14:29:50,297 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:29:50,297 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-24 14:29:50,297 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 14:29:50,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:50,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:50,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:50,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash 285965286, now seen corresponding path program 1 times [2023-08-24 14:29:50,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710289868] [2023-08-24 14:29:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:50,685 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 14:29:50,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:50,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710289868] [2023-08-24 14:29:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710289868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:50,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:29:50,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 14:29:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294885631] [2023-08-24 14:29:50,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:50,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:29:50,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:50,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:29:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:29:50,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-08-24 14:29:50,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states 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 14:29:50,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:50,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-08-24 14:29:50,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:50,795 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2023-08-24 14:29:50,795 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-24 14:29:50,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 77 events. 41/77 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 120. Up to 51 conditions per place. [2023-08-24 14:29:50,798 INFO L140 encePairwiseOnDemand]: 193/197 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-08-24 14:29:50,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 23 transitions, 113 flow [2023-08-24 14:29:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:29:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:29:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-24 14:29:50,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47715736040609136 [2023-08-24 14:29:50,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-24 14:29:50,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-24 14:29:50,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:50,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-24 14:29:50,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 14:29:50,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 14:29:50,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states 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 14:29:50,830 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 38 flow. Second operand 3 states and 282 transitions. [2023-08-24 14:29:50,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 23 transitions, 113 flow [2023-08-24 14:29:50,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 23 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 14:29:50,833 INFO L231 Difference]: Finished difference. Result has 17 places, 15 transitions, 49 flow [2023-08-24 14:29:50,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=17, PETRI_TRANSITIONS=15} [2023-08-24 14:29:50,837 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-08-24 14:29:50,837 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 15 transitions, 49 flow [2023-08-24 14:29:50,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states 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 14:29:50,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:50,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:50,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:29:50,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:50,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:50,839 INFO L85 PathProgramCache]: Analyzing trace with hash 275674925, now seen corresponding path program 1 times [2023-08-24 14:29:50,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:50,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686340084] [2023-08-24 14:29:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:50,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:50,971 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 14:29:50,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:50,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686340084] [2023-08-24 14:29:50,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686340084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:50,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:29:50,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:29:50,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247828049] [2023-08-24 14:29:50,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:50,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:29:50,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:29:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:29:50,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-08-24 14:29:50,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 49 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 14:29:50,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:50,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-08-24 14:29:50,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:51,078 INFO L124 PetriNetUnfolderBase]: 49/99 cut-off events. [2023-08-24 14:29:51,078 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-24 14:29:51,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 99 events. 49/99 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 273 event pairs, 5 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 57. Up to 47 conditions per place. [2023-08-24 14:29:51,080 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 29 selfloop transitions, 7 changer transitions 2/38 dead transitions. [2023-08-24 14:29:51,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 38 transitions, 189 flow [2023-08-24 14:29:51,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:29:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:29:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-08-24 14:29:51,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42741116751269037 [2023-08-24 14:29:51,083 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-08-24 14:29:51,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-08-24 14:29:51,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:51,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-08-24 14:29:51,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 14:29:51,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 14:29:51,090 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 14:29:51,090 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 49 flow. Second operand 5 states and 421 transitions. [2023-08-24 14:29:51,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 38 transitions, 189 flow [2023-08-24 14:29:51,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 38 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:29:51,092 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 102 flow [2023-08-24 14:29:51,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-24 14:29:51,093 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2023-08-24 14:29:51,093 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 102 flow [2023-08-24 14:29:51,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 14:29:51,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:51,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:51,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:29:51,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:51,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1439336439, now seen corresponding path program 2 times [2023-08-24 14:29:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:51,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301790712] [2023-08-24 14:29:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:51,209 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 14:29:51,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:51,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301790712] [2023-08-24 14:29:51,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301790712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:51,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:29:51,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:29:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630337412] [2023-08-24 14:29:51,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:51,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:29:51,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:51,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:29:51,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:29:51,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-08-24 14:29:51,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 14:29:51,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:51,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-08-24 14:29:51,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:51,294 INFO L124 PetriNetUnfolderBase]: 45/93 cut-off events. [2023-08-24 14:29:51,294 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-24 14:29:51,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 93 events. 45/93 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 228 event pairs, 11 based on Foata normal form. 4/97 useless extension candidates. Maximal degree in co-relation 216. Up to 59 conditions per place. [2023-08-24 14:29:51,296 INFO L140 encePairwiseOnDemand]: 193/197 looper letters, 20 selfloop transitions, 6 changer transitions 6/32 dead transitions. [2023-08-24 14:29:51,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 207 flow [2023-08-24 14:29:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:29:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:29:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 336 transitions. [2023-08-24 14:29:51,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263959390862944 [2023-08-24 14:29:51,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 336 transitions. [2023-08-24 14:29:51,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 336 transitions. [2023-08-24 14:29:51,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:51,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 336 transitions. [2023-08-24 14:29:51,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 14:29:51,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 14:29:51,301 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 14:29:51,301 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 102 flow. Second operand 4 states and 336 transitions. [2023-08-24 14:29:51,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 207 flow [2023-08-24 14:29:51,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 207 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 14:29:51,304 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 119 flow [2023-08-24 14:29:51,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-24 14:29:51,304 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 9 predicate places. [2023-08-24 14:29:51,305 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 119 flow [2023-08-24 14:29:51,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 14:29:51,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:51,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:51,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:29:51,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:51,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1223174604, now seen corresponding path program 1 times [2023-08-24 14:29:51,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:51,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728388324] [2023-08-24 14:29:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:51,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:51,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:51,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728388324] [2023-08-24 14:29:51,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728388324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:29:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770342992] [2023-08-24 14:29:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:51,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:51,469 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 14:29:51,509 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 14:29:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:51,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 14:29:51,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:29:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:51,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:29:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770342992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:29:51,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:29:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 14:29:51,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442047697] [2023-08-24 14:29:51,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:29:51,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 14:29:51,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 14:29:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-24 14:29:51,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 197 [2023-08-24 14:29:51,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 75.71428571428571) internal successors, (530), 7 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 14:29:51,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:51,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 197 [2023-08-24 14:29:51,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:52,068 INFO L124 PetriNetUnfolderBase]: 67/137 cut-off events. [2023-08-24 14:29:52,068 INFO L125 PetriNetUnfolderBase]: For 194/194 co-relation queries the response was YES. [2023-08-24 14:29:52,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 137 events. 67/137 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 400 event pairs, 2 based on Foata normal form. 20/157 useless extension candidates. Maximal degree in co-relation 342. Up to 65 conditions per place. [2023-08-24 14:29:52,070 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 35 selfloop transitions, 10 changer transitions 4/49 dead transitions. [2023-08-24 14:29:52,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 49 transitions, 348 flow [2023-08-24 14:29:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:29:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:29:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 478 transitions. [2023-08-24 14:29:52,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40439932318104904 [2023-08-24 14:29:52,074 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 478 transitions. [2023-08-24 14:29:52,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 478 transitions. [2023-08-24 14:29:52,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:52,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 478 transitions. [2023-08-24 14:29:52,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 0 states have call successors, (0), 0 states 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 14:29:52,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states 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 14:29:52,079 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 197.0) internal successors, (1379), 7 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states 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 14:29:52,079 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 119 flow. Second operand 6 states and 478 transitions. [2023-08-24 14:29:52,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 49 transitions, 348 flow [2023-08-24 14:29:52,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 49 transitions, 317 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-24 14:29:52,082 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 182 flow [2023-08-24 14:29:52,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-24 14:29:52,083 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 14 predicate places. [2023-08-24 14:29:52,083 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 182 flow [2023-08-24 14:29:52,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.71428571428571) internal successors, (530), 7 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 14:29:52,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:52,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:52,093 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 14:29:52,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:52,290 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:52,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:52,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2057316734, now seen corresponding path program 2 times [2023-08-24 14:29:52,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:52,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269926005] [2023-08-24 14:29:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:52,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:52,429 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 14:29:52,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:52,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269926005] [2023-08-24 14:29:52,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269926005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:29:52,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:29:52,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:29:52,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781913625] [2023-08-24 14:29:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:29:52,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:29:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:29:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:29:52,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-08-24 14:29:52,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 14:29:52,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:52,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-08-24 14:29:52,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:52,522 INFO L124 PetriNetUnfolderBase]: 69/141 cut-off events. [2023-08-24 14:29:52,522 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2023-08-24 14:29:52,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 141 events. 69/141 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 400 event pairs, 9 based on Foata normal form. 2/143 useless extension candidates. Maximal degree in co-relation 400. Up to 62 conditions per place. [2023-08-24 14:29:52,525 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 35 selfloop transitions, 8 changer transitions 2/45 dead transitions. [2023-08-24 14:29:52,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 377 flow [2023-08-24 14:29:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:29:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:29:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 417 transitions. [2023-08-24 14:29:52,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233502538071066 [2023-08-24 14:29:52,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 417 transitions. [2023-08-24 14:29:52,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 417 transitions. [2023-08-24 14:29:52,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:52,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 417 transitions. [2023-08-24 14:29:52,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 14:29:52,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 14:29:52,531 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 197.0) internal successors, (1182), 6 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states 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 14:29:52,531 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 182 flow. Second operand 5 states and 417 transitions. [2023-08-24 14:29:52,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 377 flow [2023-08-24 14:29:52,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 356 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-24 14:29:52,537 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 217 flow [2023-08-24 14:29:52,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-24 14:29:52,539 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 19 predicate places. [2023-08-24 14:29:52,539 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 217 flow [2023-08-24 14:29:52,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 14:29:52,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:52,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:52,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 14:29:52,541 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:52,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash 18175184, now seen corresponding path program 1 times [2023-08-24 14:29:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:52,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333494283] [2023-08-24 14:29:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:52,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:52,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333494283] [2023-08-24 14:29:52,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333494283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:29:52,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048236996] [2023-08-24 14:29:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:52,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:52,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:52,885 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 14:29:52,912 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 14:29:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:52,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 14:29:52,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:29:53,096 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 14:29:53,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:29:53,226 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 14:29:53,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048236996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:29:53,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:29:53,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-24 14:29:53,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591365880] [2023-08-24 14:29:53,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:29:53,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:29:53,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:29:53,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:29:53,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-08-24 14:29:53,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 217 flow. Second operand has 8 states, 8 states have (on average 79.125) internal successors, (633), 8 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:53,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:53,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-08-24 14:29:53,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:53,424 INFO L124 PetriNetUnfolderBase]: 151/294 cut-off events. [2023-08-24 14:29:53,424 INFO L125 PetriNetUnfolderBase]: For 923/923 co-relation queries the response was YES. [2023-08-24 14:29:53,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 294 events. 151/294 cut-off events. For 923/923 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1083 event pairs, 20 based on Foata normal form. 24/318 useless extension candidates. Maximal degree in co-relation 748. Up to 121 conditions per place. [2023-08-24 14:29:53,427 INFO L140 encePairwiseOnDemand]: 193/197 looper letters, 62 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2023-08-24 14:29:53,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 686 flow [2023-08-24 14:29:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 14:29:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 14:29:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 579 transitions. [2023-08-24 14:29:53,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41986947063089197 [2023-08-24 14:29:53,430 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 579 transitions. [2023-08-24 14:29:53,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 579 transitions. [2023-08-24 14:29:53,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:53,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 579 transitions. [2023-08-24 14:29:53,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states 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 14:29:53,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 197.0) internal successors, (1576), 8 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states 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 14:29:53,434 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 197.0) internal successors, (1576), 8 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states 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 14:29:53,434 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 217 flow. Second operand 7 states and 579 transitions. [2023-08-24 14:29:53,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 686 flow [2023-08-24 14:29:53,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 682 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 14:29:53,439 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 363 flow [2023-08-24 14:29:53,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-24 14:29:53,439 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 27 predicate places. [2023-08-24 14:29:53,439 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 363 flow [2023-08-24 14:29:53,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 79.125) internal successors, (633), 8 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:29:53,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:53,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:53,448 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 14:29:53,646 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,SelfDestructingSolverStorable5 [2023-08-24 14:29:53,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:53,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:53,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1308914164, now seen corresponding path program 2 times [2023-08-24 14:29:53,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:53,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480877534] [2023-08-24 14:29:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:53,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:54,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:54,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480877534] [2023-08-24 14:29:54,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480877534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:29:54,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239459822] [2023-08-24 14:29:54,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:29:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:54,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:54,377 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 14:29:54,378 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 14:29:54,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:29:54,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:29:54,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 14:29:54,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:29:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:54,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:29:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:55,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239459822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:29:55,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:29:55,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-24 14:29:55,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104856608] [2023-08-24 14:29:55,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:29:55,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 14:29:55,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 14:29:55,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-08-24 14:29:55,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 197 [2023-08-24 14:29:55,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 363 flow. Second operand has 12 states, 12 states have (on average 64.75) internal successors, (777), 12 states have internal predecessors, (777), 0 states have call successors, (0), 0 states 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 14:29:55,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:55,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 197 [2023-08-24 14:29:55,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:55,647 INFO L124 PetriNetUnfolderBase]: 298/596 cut-off events. [2023-08-24 14:29:55,648 INFO L125 PetriNetUnfolderBase]: For 2519/2519 co-relation queries the response was YES. [2023-08-24 14:29:55,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2935 conditions, 596 events. 298/596 cut-off events. For 2519/2519 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2915 event pairs, 14 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 1364. Up to 233 conditions per place. [2023-08-24 14:29:55,654 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 62 selfloop transitions, 47 changer transitions 2/111 dead transitions. [2023-08-24 14:29:55,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 111 transitions, 1116 flow [2023-08-24 14:29:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 14:29:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 14:29:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 687 transitions. [2023-08-24 14:29:55,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487309644670051 [2023-08-24 14:29:55,657 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 687 transitions. [2023-08-24 14:29:55,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 687 transitions. [2023-08-24 14:29:55,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:55,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 687 transitions. [2023-08-24 14:29:55,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 68.7) internal successors, (687), 10 states have internal predecessors, (687), 0 states have call successors, (0), 0 states 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 14:29:55,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states 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 14:29:55,662 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states 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 14:29:55,662 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 363 flow. Second operand 10 states and 687 transitions. [2023-08-24 14:29:55,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 111 transitions, 1116 flow [2023-08-24 14:29:55,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 111 transitions, 1033 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-08-24 14:29:55,671 INFO L231 Difference]: Finished difference. Result has 57 places, 73 transitions, 841 flow [2023-08-24 14:29:55,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=841, PETRI_PLACES=57, PETRI_TRANSITIONS=73} [2023-08-24 14:29:55,672 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 39 predicate places. [2023-08-24 14:29:55,672 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 73 transitions, 841 flow [2023-08-24 14:29:55,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.75) internal successors, (777), 12 states have internal predecessors, (777), 0 states have call successors, (0), 0 states 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 14:29:55,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:55,672 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:55,681 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 14:29:55,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:55,878 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:55,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:55,879 INFO L85 PathProgramCache]: Analyzing trace with hash -970027468, now seen corresponding path program 3 times [2023-08-24 14:29:55,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:55,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750680027] [2023-08-24 14:29:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:55,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:29:56,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:56,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750680027] [2023-08-24 14:29:56,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750680027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:29:56,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636300034] [2023-08-24 14:29:56,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 14:29:56,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:56,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:56,732 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 14:29:56,735 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 14:29:56,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 14:29:56,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:29:56,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 14:29:56,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:29:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:57,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:29:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:57,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636300034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:29:57,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:29:57,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-08-24 14:29:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262856446] [2023-08-24 14:29:57,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:29:57,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 14:29:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:29:57,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 14:29:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-24 14:29:57,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 197 [2023-08-24 14:29:57,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 73 transitions, 841 flow. Second operand has 14 states, 14 states have (on average 68.35714285714286) internal successors, (957), 14 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 14:29:57,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:29:57,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 197 [2023-08-24 14:29:57,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:29:59,178 INFO L124 PetriNetUnfolderBase]: 431/881 cut-off events. [2023-08-24 14:29:59,178 INFO L125 PetriNetUnfolderBase]: For 4963/4963 co-relation queries the response was YES. [2023-08-24 14:29:59,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4694 conditions, 881 events. 431/881 cut-off events. For 4963/4963 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4918 event pairs, 16 based on Foata normal form. 6/887 useless extension candidates. Maximal degree in co-relation 3804. Up to 339 conditions per place. [2023-08-24 14:29:59,186 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 57 selfloop transitions, 101 changer transitions 2/160 dead transitions. [2023-08-24 14:29:59,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 160 transitions, 1791 flow [2023-08-24 14:29:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 14:29:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 14:29:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1075 transitions. [2023-08-24 14:29:59,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3637901861252115 [2023-08-24 14:29:59,189 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1075 transitions. [2023-08-24 14:29:59,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1075 transitions. [2023-08-24 14:29:59,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:29:59,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1075 transitions. [2023-08-24 14:29:59,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 71.66666666666667) internal successors, (1075), 15 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states 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 14:29:59,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 197.0) internal successors, (3152), 16 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 14:29:59,197 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 197.0) internal successors, (3152), 16 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 14:29:59,197 INFO L175 Difference]: Start difference. First operand has 57 places, 73 transitions, 841 flow. Second operand 15 states and 1075 transitions. [2023-08-24 14:29:59,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 160 transitions, 1791 flow [2023-08-24 14:29:59,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 160 transitions, 1700 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-08-24 14:29:59,211 INFO L231 Difference]: Finished difference. Result has 71 places, 111 transitions, 1378 flow [2023-08-24 14:29:59,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1378, PETRI_PLACES=71, PETRI_TRANSITIONS=111} [2023-08-24 14:29:59,213 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2023-08-24 14:29:59,213 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 111 transitions, 1378 flow [2023-08-24 14:29:59,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.35714285714286) internal successors, (957), 14 states have internal predecessors, (957), 0 states have call successors, (0), 0 states 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 14:29:59,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:29:59,214 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:29:59,227 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 14:29:59,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:59,428 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:29:59,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:29:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1894613441, now seen corresponding path program 4 times [2023-08-24 14:29:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:29:59,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059356791] [2023-08-24 14:29:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:29:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:29:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:29:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:29:59,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:29:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059356791] [2023-08-24 14:29:59,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059356791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:29:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742602658] [2023-08-24 14:29:59,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 14:29:59,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:29:59,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:29:59,737 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 14:29:59,755 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 14:29:59,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 14:29:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:29:59,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 14:29:59,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:29:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:29:59,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:30:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742602658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:00,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:00,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-24 14:30:00,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900486845] [2023-08-24 14:30:00,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 14:30:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 14:30:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-24 14:30:00,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-08-24 14:30:00,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 111 transitions, 1378 flow. Second operand has 16 states, 16 states have (on average 79.625) internal successors, (1274), 16 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 14:30:00,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:00,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-08-24 14:30:00,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:09,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:30:12,815 INFO L124 PetriNetUnfolderBase]: 988/2041 cut-off events. [2023-08-24 14:30:12,815 INFO L125 PetriNetUnfolderBase]: For 15755/15755 co-relation queries the response was YES. [2023-08-24 14:30:12,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 2041 events. 988/2041 cut-off events. For 15755/15755 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14051 event pairs, 0 based on Foata normal form. 402/2443 useless extension candidates. Maximal degree in co-relation 10000. Up to 751 conditions per place. [2023-08-24 14:30:12,827 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 197 selfloop transitions, 244 changer transitions 141/582 dead transitions. [2023-08-24 14:30:12,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 582 transitions, 7744 flow [2023-08-24 14:30:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-24 14:30:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-24 14:30:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5493 transitions. [2023-08-24 14:30:12,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41616789150693234 [2023-08-24 14:30:12,843 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5493 transitions. [2023-08-24 14:30:12,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5493 transitions. [2023-08-24 14:30:12,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:12,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5493 transitions. [2023-08-24 14:30:12,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 81.98507462686567) internal successors, (5493), 67 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states 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 14:30:12,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 0 states have call successors, (0), 0 states 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 14:30:12,909 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 0 states have call successors, (0), 0 states 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 14:30:12,909 INFO L175 Difference]: Start difference. First operand has 71 places, 111 transitions, 1378 flow. Second operand 67 states and 5493 transitions. [2023-08-24 14:30:12,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 582 transitions, 7744 flow [2023-08-24 14:30:12,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 582 transitions, 6062 flow, removed 744 selfloop flow, removed 8 redundant places. [2023-08-24 14:30:12,964 INFO L231 Difference]: Finished difference. Result has 138 places, 302 transitions, 3518 flow [2023-08-24 14:30:12,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=3518, PETRI_PLACES=138, PETRI_TRANSITIONS=302} [2023-08-24 14:30:12,965 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 120 predicate places. [2023-08-24 14:30:12,965 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 302 transitions, 3518 flow [2023-08-24 14:30:12,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 79.625) internal successors, (1274), 16 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 14:30:12,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:12,966 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:12,972 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 14:30:13,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:13,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:30:13,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1403469600, now seen corresponding path program 5 times [2023-08-24 14:30:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:13,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717361639] [2023-08-24 14:30:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:13,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:13,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717361639] [2023-08-24 14:30:13,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717361639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:13,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454739557] [2023-08-24 14:30:13,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 14:30:13,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:13,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:13,408 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 14:30:13,410 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 14:30:13,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 14:30:13,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:30:13,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 14:30:13,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:13,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454739557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:14,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:14,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2023-08-24 14:30:14,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893057964] [2023-08-24 14:30:14,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:14,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 14:30:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:14,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 14:30:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-24 14:30:14,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 197 [2023-08-24 14:30:14,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 302 transitions, 3518 flow. Second operand has 18 states, 18 states have (on average 74.44444444444444) internal successors, (1340), 18 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 14:30:14,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:14,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 197 [2023-08-24 14:30:14,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:17,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:30:20,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:30:26,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:30:30,199 INFO L124 PetriNetUnfolderBase]: 1011/1870 cut-off events. [2023-08-24 14:30:30,199 INFO L125 PetriNetUnfolderBase]: For 9484/9484 co-relation queries the response was YES. [2023-08-24 14:30:30,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10487 conditions, 1870 events. 1011/1870 cut-off events. For 9484/9484 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10765 event pairs, 4 based on Foata normal form. 116/1986 useless extension candidates. Maximal degree in co-relation 10422. Up to 662 conditions per place. [2023-08-24 14:30:30,217 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 311 selfloop transitions, 307 changer transitions 0/618 dead transitions. [2023-08-24 14:30:30,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 618 transitions, 7552 flow [2023-08-24 14:30:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 14:30:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 14:30:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3294 transitions. [2023-08-24 14:30:30,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888560972730492 [2023-08-24 14:30:30,222 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3294 transitions. [2023-08-24 14:30:30,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3294 transitions. [2023-08-24 14:30:30,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:30,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3294 transitions. [2023-08-24 14:30:30,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 76.6046511627907) internal successors, (3294), 43 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states 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 14:30:30,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 197.0) internal successors, (8668), 44 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states 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 14:30:30,238 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 197.0) internal successors, (8668), 44 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states 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 14:30:30,238 INFO L175 Difference]: Start difference. First operand has 138 places, 302 transitions, 3518 flow. Second operand 43 states and 3294 transitions. [2023-08-24 14:30:30,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 618 transitions, 7552 flow [2023-08-24 14:30:30,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 618 transitions, 5921 flow, removed 729 selfloop flow, removed 16 redundant places. [2023-08-24 14:30:30,311 INFO L231 Difference]: Finished difference. Result has 171 places, 480 transitions, 5316 flow [2023-08-24 14:30:30,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5316, PETRI_PLACES=171, PETRI_TRANSITIONS=480} [2023-08-24 14:30:30,312 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 153 predicate places. [2023-08-24 14:30:30,312 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 480 transitions, 5316 flow [2023-08-24 14:30:30,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 74.44444444444444) internal successors, (1340), 18 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 14:30:30,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:30,313 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:30,319 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 14:30:30,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:30,519 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:30:30,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:30,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2100218938, now seen corresponding path program 6 times [2023-08-24 14:30:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:30,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411800871] [2023-08-24 14:30:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:30:30,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411800871] [2023-08-24 14:30:30,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411800871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128518160] [2023-08-24 14:30:30,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 14:30:30,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:30,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:30,893 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 14:30:30,895 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 14:30:31,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 14:30:31,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:30:31,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 14:30:31,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:30:31,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:30:31,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128518160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:31,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:31,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 14:30:31,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849075604] [2023-08-24 14:30:31,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:31,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 14:30:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:31,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 14:30:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-24 14:30:31,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 197 [2023-08-24 14:30:31,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 480 transitions, 5316 flow. Second operand has 20 states, 20 states have (on average 69.35) internal successors, (1387), 20 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states 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 14:30:31,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:31,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 197 [2023-08-24 14:30:31,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:36,145 INFO L124 PetriNetUnfolderBase]: 1488/2673 cut-off events. [2023-08-24 14:30:36,145 INFO L125 PetriNetUnfolderBase]: For 16053/16053 co-relation queries the response was YES. [2023-08-24 14:30:36,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14306 conditions, 2673 events. 1488/2673 cut-off events. For 16053/16053 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15985 event pairs, 0 based on Foata normal form. 204/2869 useless extension candidates. Maximal degree in co-relation 14180. Up to 960 conditions per place. [2023-08-24 14:30:36,166 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 481 selfloop transitions, 410 changer transitions 0/891 dead transitions. [2023-08-24 14:30:36,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 891 transitions, 10563 flow [2023-08-24 14:30:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 14:30:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 14:30:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3659 transitions. [2023-08-24 14:30:36,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641883149198766 [2023-08-24 14:30:36,171 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3659 transitions. [2023-08-24 14:30:36,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3659 transitions. [2023-08-24 14:30:36,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:36,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3659 transitions. [2023-08-24 14:30:36,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 71.74509803921569) internal successors, (3659), 51 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states 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 14:30:36,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 197.0) internal successors, (10244), 52 states have internal predecessors, (10244), 0 states have call successors, (0), 0 states 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 14:30:36,189 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 197.0) internal successors, (10244), 52 states have internal predecessors, (10244), 0 states have call successors, (0), 0 states 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 14:30:36,189 INFO L175 Difference]: Start difference. First operand has 171 places, 480 transitions, 5316 flow. Second operand 51 states and 3659 transitions. [2023-08-24 14:30:36,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 891 transitions, 10563 flow [2023-08-24 14:30:36,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 891 transitions, 10045 flow, removed 213 selfloop flow, removed 15 redundant places. [2023-08-24 14:30:36,302 INFO L231 Difference]: Finished difference. Result has 227 places, 690 transitions, 8650 flow [2023-08-24 14:30:36,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=4792, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8650, PETRI_PLACES=227, PETRI_TRANSITIONS=690} [2023-08-24 14:30:36,303 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 209 predicate places. [2023-08-24 14:30:36,303 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 690 transitions, 8650 flow [2023-08-24 14:30:36,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.35) internal successors, (1387), 20 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states 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 14:30:36,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:36,304 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:36,309 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 14:30:36,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:36,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:30:36,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:36,505 INFO L85 PathProgramCache]: Analyzing trace with hash -346475000, now seen corresponding path program 7 times [2023-08-24 14:30:36,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:36,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140101100] [2023-08-24 14:30:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:36,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 14:30:36,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:36,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140101100] [2023-08-24 14:30:36,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140101100] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:36,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125439245] [2023-08-24 14:30:36,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 14:30:36,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:36,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:36,833 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 14:30:36,835 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 14:30:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:37,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 14:30:37,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:37,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125439245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:41,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:41,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 25 [2023-08-24 14:30:41,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595479037] [2023-08-24 14:30:41,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 14:30:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 14:30:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2023-08-24 14:30:41,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 197 [2023-08-24 14:30:41,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 690 transitions, 8650 flow. Second operand has 26 states, 26 states have (on average 73.76923076923077) internal successors, (1918), 26 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 14:30:41,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:41,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 197 [2023-08-24 14:30:41,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:56,491 WARN L234 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 76 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 14:31:15,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:17,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:25,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:28,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:37,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:39,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:41,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:49,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:51,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:31:54,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:32:05,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:32:06,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:32:08,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:32:21,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:32:23,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:32:28,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:32:34,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:32:48,106 INFO L124 PetriNetUnfolderBase]: 2759/4884 cut-off events. [2023-08-24 14:32:48,106 INFO L125 PetriNetUnfolderBase]: For 34080/34080 co-relation queries the response was YES. [2023-08-24 14:32:48,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30284 conditions, 4884 events. 2759/4884 cut-off events. For 34080/34080 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31962 event pairs, 64 based on Foata normal form. 52/4934 useless extension candidates. Maximal degree in co-relation 29956. Up to 1567 conditions per place. [2023-08-24 14:32:48,146 INFO L140 encePairwiseOnDemand]: 192/197 looper letters, 569 selfloop transitions, 862 changer transitions 31/1462 dead transitions. [2023-08-24 14:32:48,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1462 transitions, 20694 flow [2023-08-24 14:32:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 14:32:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 14:32:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3905 transitions. [2023-08-24 14:32:48,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38867323579177865 [2023-08-24 14:32:48,152 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3905 transitions. [2023-08-24 14:32:48,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3905 transitions. [2023-08-24 14:32:48,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:32:48,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3905 transitions. [2023-08-24 14:32:48,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 76.56862745098039) internal successors, (3905), 51 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states 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 14:32:48,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 197.0) internal successors, (10244), 52 states have internal predecessors, (10244), 0 states have call successors, (0), 0 states 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 14:32:48,170 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 197.0) internal successors, (10244), 52 states have internal predecessors, (10244), 0 states have call successors, (0), 0 states 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 14:32:48,170 INFO L175 Difference]: Start difference. First operand has 227 places, 690 transitions, 8650 flow. Second operand 51 states and 3905 transitions. [2023-08-24 14:32:48,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 1462 transitions, 20694 flow [2023-08-24 14:32:48,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1462 transitions, 19657 flow, removed 381 selfloop flow, removed 11 redundant places. [2023-08-24 14:32:48,586 INFO L231 Difference]: Finished difference. Result has 295 places, 1255 transitions, 18379 flow [2023-08-24 14:32:48,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=8013, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=18379, PETRI_PLACES=295, PETRI_TRANSITIONS=1255} [2023-08-24 14:32:48,587 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 277 predicate places. [2023-08-24 14:32:48,587 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 1255 transitions, 18379 flow [2023-08-24 14:32:48,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 73.76923076923077) internal successors, (1918), 26 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 14:32:48,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:32:48,588 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:32:48,592 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 14:32:48,788 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,SelfDestructingSolverStorable11 [2023-08-24 14:32:48,789 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 14:32:48,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:32:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2139167752, now seen corresponding path program 8 times [2023-08-24 14:32:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:32:48,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788410150] [2023-08-24 14:32:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:32:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:32:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:32:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:32:49,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:32:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788410150] [2023-08-24 14:32:49,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788410150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:32:49,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615171452] [2023-08-24 14:32:49,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:32:49,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:32:49,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:32:49,733 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 14:32:49,735 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 14:32:50,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:32:50,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:32:50,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 14:32:50,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:32:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:53,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:33:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:33:23,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615171452] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:33:23,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:33:23,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 31 [2023-08-24 14:33:23,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463863364] [2023-08-24 14:33:23,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:33:23,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 14:33:23,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:33:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 14:33:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=752, Unknown=10, NotChecked=0, Total=992 [2023-08-24 14:33:23,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 197 [2023-08-24 14:33:23,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 1255 transitions, 18379 flow. Second operand has 32 states, 32 states have (on average 73.59375) internal successors, (2355), 32 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states 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 14:33:23,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:33:23,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 197 [2023-08-24 14:33:23,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:34:02,719 WARN L234 SmtUtils]: Spent 25.35s on a formula simplification. DAG size of input: 104 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 14:34:06,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:12,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:14,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:16,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:18,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:20,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:24,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:26,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:28,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:30,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:32,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:45,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:34:56,990 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 80 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 14:34:59,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:35:01,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:35:06,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:35:08,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:35:11,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:36:19,323 WARN L234 SmtUtils]: Spent 37.67s on a formula simplification. DAG size of input: 89 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 14:36:35,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:36:38,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:36:40,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:36:42,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:36:46,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:36:48,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:37:04,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:37:05,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:37:08,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:37:10,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:37:46,594 WARN L234 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 70 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 14:37:54,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:38:58,933 WARN L234 SmtUtils]: Spent 45.35s on a formula simplification. DAG size of input: 86 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 14:39:11,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:39:35,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:39:37,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 14:39:39,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:39:40,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:39:42,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:39:45,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:40:29,132 WARN L234 SmtUtils]: Spent 17.48s on a formula simplification. DAG size of input: 75 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 14:40:31,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:40:37,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:40:51,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:40:53,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:40:55,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:40:57,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:40:59,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:41:01,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:41:04,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:41:50,653 WARN L234 SmtUtils]: Spent 9.48s on a formula simplification. DAG size of input: 65 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 14:41:53,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 14:41:56,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2023-08-24 14:44:16,432 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 14:44:16,436 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 14:44:17,444 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 14:44:17,633 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 14:44:17,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2023-08-24 14:44:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 14:44:17,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 14:44:17,640 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:264) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:167) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:482) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfoldingHelper(PetriNetUnfolderBase.java:226) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfolding(PetriNetUnfolderBase.java:183) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.(PetriNetUnfolderBase.java:123) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:72) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:128) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-08-24 14:44:17,647 INFO L158 Benchmark]: Toolchain (without parser) took 870692.06ms. Allocated memory was 381.7MB in the beginning and 608.2MB in the end (delta: 226.5MB). Free memory was 338.8MB in the beginning and 428.6MB in the end (delta: -89.7MB). Peak memory consumption was 137.2MB. Max. memory is 16.0GB. [2023-08-24 14:44:17,647 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 381.7MB. Free memory was 359.1MB in the beginning and 359.0MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:44:17,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.84ms. Allocated memory is still 381.7MB. Free memory was 338.8MB in the beginning and 327.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 14:44:17,648 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.06ms. Allocated memory is still 381.7MB. Free memory was 327.3MB in the beginning and 326.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:44:17,648 INFO L158 Benchmark]: Boogie Preprocessor took 31.69ms. Allocated memory is still 381.7MB. Free memory was 325.2MB in the beginning and 324.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:44:17,648 INFO L158 Benchmark]: RCFGBuilder took 337.88ms. Allocated memory is still 381.7MB. Free memory was 324.1MB in the beginning and 308.4MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 14:44:17,648 INFO L158 Benchmark]: TraceAbstraction took 870021.09ms. Allocated memory was 381.7MB in the beginning and 608.2MB in the end (delta: 226.5MB). Free memory was 308.4MB in the beginning and 428.6MB in the end (delta: -120.2MB). Peak memory consumption was 107.8MB. Max. memory is 16.0GB. [2023-08-24 14:44:17,649 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 381.7MB. Free memory was 359.1MB in the beginning and 359.0MB in the end (delta: 94.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 253.84ms. Allocated memory is still 381.7MB. Free memory was 338.8MB in the beginning and 327.3MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.06ms. Allocated memory is still 381.7MB. Free memory was 327.3MB in the beginning and 326.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 31.69ms. Allocated memory is still 381.7MB. Free memory was 325.2MB in the beginning and 324.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 337.88ms. Allocated memory is still 381.7MB. Free memory was 324.1MB in the beginning and 308.4MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 870021.09ms. Allocated memory was 381.7MB in the beginning and 608.2MB in the end (delta: 226.5MB). Free memory was 308.4MB in the beginning and 428.6MB in the end (delta: -120.2MB). Peak memory consumption was 107.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 92 PlacesBefore, 18 PlacesAfterwards, 93 TransitionsBefore, 13 TransitionsAfterwards, 728 CoEnabledTransitionPairs, 7 FixpointIterations, 51 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 94 TotalNumberOfCompositions, 789 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 756, independent: 750, independent conditional: 0, independent unconditional: 750, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 392, independent: 387, independent conditional: 0, independent unconditional: 387, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 756, independent: 363, independent conditional: 0, independent unconditional: 363, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 392, unknown conditional: 0, unknown unconditional: 392] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown