/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:41:56,076 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:41:56,138 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 [2023-08-23 22:41:56,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:41:56,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:41:56,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:41:56,165 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:41:56,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:41:56,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:41:56,168 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:41:56,169 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:41:56,169 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:41:56,169 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:41:56,170 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:41:56,170 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:41:56,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:41:56,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:41:56,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:41:56,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:41:56,171 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:41:56,171 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:41:56,171 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:41:56,172 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:41:56,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:41:56,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:41:56,172 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:41:56,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:41:56,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:41:56,173 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:41:56,173 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:41:56,174 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:41:56,174 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:41:56,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:41:56,174 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:41:56,174 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:41:56,174 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:41:56,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:41:56,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:41:56,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:41:56,400 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:41:56,400 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:41:56,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2023-08-23 22:41:57,268 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:41:57,502 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:41:57,502 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2023-08-23 22:41:57,518 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7381d52c7/5ae4f79f4c5f464d87d87b18c27ac3e2/FLAGf1c3dad4e [2023-08-23 22:41:57,529 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7381d52c7/5ae4f79f4c5f464d87d87b18c27ac3e2 [2023-08-23 22:41:57,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:41:57,533 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:41:57,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:41:57,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:41:57,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:41:57,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,538 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f48ce9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57, skipping insertion in model container [2023-08-23 22:41:57,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,577 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:41:57,804 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2023-08-23 22:41:57,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:41:57,809 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:41:57,825 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-23 22:41:57,826 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-23 22:41:57,838 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2023-08-23 22:41:57,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:41:57,857 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:41:57,857 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:41:57,862 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:41:57,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57 WrapperNode [2023-08-23 22:41:57,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:41:57,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:41:57,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:41:57,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:41:57,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,905 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-23 22:41:57,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:41:57,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:41:57,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:41:57,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:41:57,911 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,924 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:41:57,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:41:57,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:41:57,934 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:41:57,934 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (1/1) ... [2023-08-23 22:41:57,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:41:57,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:57,958 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) [2023-08-23 22:41:57,964 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 [2023-08-23 22:41:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-23 22:41:57,980 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-23 22:41:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-23 22:41:57,980 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-23 22:41:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:41:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 22:41:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:41:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:41:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:41:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:41:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 22:41:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:41:57,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:41:57,982 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:41:58,089 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:41:58,090 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:41:58,220 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:41:58,228 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:41:58,228 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-23 22:41:58,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:41:58 BoogieIcfgContainer [2023-08-23 22:41:58,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:41:58,231 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:41:58,231 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:41:58,234 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:41:58,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:41:57" (1/3) ... [2023-08-23 22:41:58,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34558001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:41:58, skipping insertion in model container [2023-08-23 22:41:58,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:57" (2/3) ... [2023-08-23 22:41:58,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34558001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:41:58, skipping insertion in model container [2023-08-23 22:41:58,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:41:58" (3/3) ... [2023-08-23 22:41:58,236 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2023-08-23 22:41:58,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:41:58,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:41:58,248 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:41:58,306 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:41:58,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 68 transitions, 146 flow [2023-08-23 22:41:58,372 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-23 22:41:58,372 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:58,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 66 events. 5/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-23 22:41:58,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 68 transitions, 146 flow [2023-08-23 22:41:58,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:58,383 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:41:58,392 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:58,394 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:58,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:58,420 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-23 22:41:58,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:58,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 66 events. 5/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-23 22:41:58,422 INFO L119 LiptonReduction]: Number of co-enabled transitions 1200 [2023-08-23 22:41:59,961 INFO L134 LiptonReduction]: Checked pairs total: 1095 [2023-08-23 22:41:59,962 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-23 22:41:59,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:41:59,974 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;@2c07a1d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:41:59,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-23 22:41:59,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:41:59,976 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-08-23 22:41:59,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:59,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:59,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:41:59,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:59,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:59,980 INFO L85 PathProgramCache]: Analyzing trace with hash -541533417, now seen corresponding path program 1 times [2023-08-23 22:41:59,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:59,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862668541] [2023-08-23 22:41:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:59,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:00,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862668541] [2023-08-23 22:42:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862668541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:42:00,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:42:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:42:00,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123411954] [2023-08-23 22:42:00,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:42:00,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:42:00,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:42:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:42:00,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:00,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:00,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:00,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:00,337 INFO L124 PetriNetUnfolderBase]: 94/152 cut-off events. [2023-08-23 22:42:00,337 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:42:00,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 396 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-08-23 22:42:00,338 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-08-23 22:42:00,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-08-23 22:42:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 22:42:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 22:42:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-23 22:42:00,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470703125 [2023-08-23 22:42:00,347 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-23 22:42:00,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-23 22:42:00,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:00,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-23 22:42:00,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,355 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 241 transitions. [2023-08-23 22:42:00,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-08-23 22:42:00,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:42:00,357 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-08-23 22:42:00,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-23 22:42:00,361 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-08-23 22:42:00,361 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-08-23 22:42:00,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:00,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:00,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:42:00,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:00,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash -722991115, now seen corresponding path program 1 times [2023-08-23 22:42:00,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:00,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775158944] [2023-08-23 22:42:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:00,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:00,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:00,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775158944] [2023-08-23 22:42:00,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775158944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:42:00,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:42:00,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:42:00,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667195614] [2023-08-23 22:42:00,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:42:00,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:42:00,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:42:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:42:00,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:00,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:00,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:00,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:00,500 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-23 22:42:00,500 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-23 22:42:00,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 658 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-08-23 22:42:00,502 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-23 22:42:00,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-08-23 22:42:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:42:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:42:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2023-08-23 22:42:00,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-08-23 22:42:00,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 356 transitions. [2023-08-23 22:42:00,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 356 transitions. [2023-08-23 22:42:00,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:00,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 356 transitions. [2023-08-23 22:42:00,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,509 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,510 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 356 transitions. [2023-08-23 22:42:00,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-08-23 22:42:00,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:42:00,511 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-08-23 22:42:00,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-23 22:42:00,512 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-08-23 22:42:00,512 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-08-23 22:42:00,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:00,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:00,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:42:00,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:00,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash -722976235, now seen corresponding path program 2 times [2023-08-23 22:42:00,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:00,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700320621] [2023-08-23 22:42:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:00,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:00,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700320621] [2023-08-23 22:42:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700320621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:42:00,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:42:00,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:42:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939398165] [2023-08-23 22:42:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:42:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:42:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:42:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:42:00,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:00,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:00,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:00,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:00,679 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-23 22:42:00,680 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-23 22:42:00,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 681 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2023-08-23 22:42:00,683 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-08-23 22:42:00,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-08-23 22:42:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:42:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:42:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 413 transitions. [2023-08-23 22:42:00,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609375 [2023-08-23 22:42:00,685 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 413 transitions. [2023-08-23 22:42:00,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 413 transitions. [2023-08-23 22:42:00,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:00,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 413 transitions. [2023-08-23 22:42:00,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,690 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,690 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 413 transitions. [2023-08-23 22:42:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-08-23 22:42:00,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-23 22:42:00,693 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-08-23 22:42:00,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-23 22:42:00,694 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-08-23 22:42:00,696 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-08-23 22:42:00,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:00,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:00,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:42:00,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:00,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1288779972, now seen corresponding path program 1 times [2023-08-23 22:42:00,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:00,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897938469] [2023-08-23 22:42:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:00,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:00,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897938469] [2023-08-23 22:42:00,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897938469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:42:00,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:42:00,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:42:00,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052860021] [2023-08-23 22:42:00,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:42:00,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:42:00,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:00,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:42:00,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-23 22:42:00,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:00,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:00,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:00,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:00,874 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-23 22:42:00,874 INFO L125 PetriNetUnfolderBase]: For 777/777 co-relation queries the response was YES. [2023-08-23 22:42:00,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 942 event pairs, 20 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2023-08-23 22:42:00,876 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-08-23 22:42:00,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-08-23 22:42:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-23 22:42:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-23 22:42:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-08-23 22:42:00,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458984375 [2023-08-23 22:42:00,878 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-08-23 22:42:00,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-08-23 22:42:00,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:00,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-08-23 22:42:00,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 128.0) internal successors, (1152), 9 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,881 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 128.0) internal successors, (1152), 9 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,881 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 470 transitions. [2023-08-23 22:42:00,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-08-23 22:42:00,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-23 22:42:00,887 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-08-23 22:42:00,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-23 22:42:00,888 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-08-23 22:42:00,888 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-08-23 22:42:00,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:00,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:00,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:42:00,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:00,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1319181672, now seen corresponding path program 2 times [2023-08-23 22:42:00,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:00,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572716424] [2023-08-23 22:42:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:00,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:00,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:00,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572716424] [2023-08-23 22:42:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572716424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:42:00,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:42:00,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:42:00,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596666075] [2023-08-23 22:42:00,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:42:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:42:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:00,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:42:00,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-23 22:42:00,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:00,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:00,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:00,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:01,066 INFO L124 PetriNetUnfolderBase]: 154/271 cut-off events. [2023-08-23 22:42:01,066 INFO L125 PetriNetUnfolderBase]: For 1323/1323 co-relation queries the response was YES. [2023-08-23 22:42:01,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 923 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2023-08-23 22:42:01,067 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-08-23 22:42:01,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-08-23 22:42:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:42:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:42:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 411 transitions. [2023-08-23 22:42:01,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45870535714285715 [2023-08-23 22:42:01,069 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 411 transitions. [2023-08-23 22:42:01,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 411 transitions. [2023-08-23 22:42:01,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:01,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 411 transitions. [2023-08-23 22:42:01,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,071 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,071 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 411 transitions. [2023-08-23 22:42:01,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-08-23 22:42:01,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-23 22:42:01,075 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-08-23 22:42:01,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-23 22:42:01,076 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-08-23 22:42:01,076 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-08-23 22:42:01,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:01,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:01,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:42:01,077 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:01,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2055022021, now seen corresponding path program 3 times [2023-08-23 22:42:01,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:01,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134270892] [2023-08-23 22:42:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:01,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:01,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134270892] [2023-08-23 22:42:01,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134270892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:01,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131220727] [2023-08-23 22:42:01,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:42:01,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:01,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:01,162 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) [2023-08-23 22:42:01,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 22:42:01,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-23 22:42:01,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:01,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-23 22:42:01,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:01,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:01,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131220727] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:01,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:01,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-23 22:42:01,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124677518] [2023-08-23 22:42:01,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:01,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-23 22:42:01,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-23 22:42:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-08-23 22:42:01,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:01,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 13 states, 13 states have (on average 54.84615384615385) internal successors, (713), 13 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:01,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:01,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:01,550 INFO L124 PetriNetUnfolderBase]: 202/351 cut-off events. [2023-08-23 22:42:01,550 INFO L125 PetriNetUnfolderBase]: For 2205/2205 co-relation queries the response was YES. [2023-08-23 22:42:01,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1199 event pairs, 18 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-08-23 22:42:01,552 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 34 selfloop transitions, 36 changer transitions 22/92 dead transitions. [2023-08-23 22:42:01,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 958 flow [2023-08-23 22:42:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-23 22:42:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-23 22:42:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 816 transitions. [2023-08-23 22:42:01,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2023-08-23 22:42:01,554 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 816 transitions. [2023-08-23 22:42:01,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 816 transitions. [2023-08-23 22:42:01,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:01,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 816 transitions. [2023-08-23 22:42:01,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.285714285714285) internal successors, (816), 14 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 128.0) internal successors, (1920), 15 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,559 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 128.0) internal successors, (1920), 15 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,559 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 14 states and 816 transitions. [2023-08-23 22:42:01,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 958 flow [2023-08-23 22:42:01,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 893 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-23 22:42:01,565 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 701 flow [2023-08-23 22:42:01,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=701, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-08-23 22:42:01,567 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 47 predicate places. [2023-08-23 22:42:01,567 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 701 flow [2023-08-23 22:42:01,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.84615384615385) internal successors, (713), 13 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:01,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:01,567 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:01,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:01,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-23 22:42:01,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:01,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:01,772 INFO L85 PathProgramCache]: Analyzing trace with hash -728579416, now seen corresponding path program 4 times [2023-08-23 22:42:01,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:01,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472046782] [2023-08-23 22:42:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:01,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:01,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472046782] [2023-08-23 22:42:01,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472046782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120827142] [2023-08-23 22:42:01,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:42:01,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:01,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:01,879 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) [2023-08-23 22:42:01,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-23 22:42:01,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:42:01,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:01,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-23 22:42:01,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:01,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:02,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120827142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:02,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:02,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-23 22:42:02,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864188147] [2023-08-23 22:42:02,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:02,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-23 22:42:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-23 22:42:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-23 22:42:02,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:02,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 701 flow. Second operand has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:02,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:02,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:02,313 INFO L124 PetriNetUnfolderBase]: 258/463 cut-off events. [2023-08-23 22:42:02,313 INFO L125 PetriNetUnfolderBase]: For 4313/4313 co-relation queries the response was YES. [2023-08-23 22:42:02,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 463 events. 258/463 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1653 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2411. Up to 237 conditions per place. [2023-08-23 22:42:02,316 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-08-23 22:42:02,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1469 flow [2023-08-23 22:42:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-23 22:42:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-23 22:42:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-08-23 22:42:02,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45458984375 [2023-08-23 22:42:02,318 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-08-23 22:42:02,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-08-23 22:42:02,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:02,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-08-23 22:42:02,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.1875) internal successors, (931), 16 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 128.0) internal successors, (2176), 17 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,322 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 128.0) internal successors, (2176), 17 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,322 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 701 flow. Second operand 16 states and 931 transitions. [2023-08-23 22:42:02,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1469 flow [2023-08-23 22:42:02,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1110 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-08-23 22:42:02,332 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 781 flow [2023-08-23 22:42:02,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=781, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-08-23 22:42:02,332 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-08-23 22:42:02,332 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 781 flow [2023-08-23 22:42:02,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:02,333 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:02,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:02,537 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,SelfDestructingSolverStorable6 [2023-08-23 22:42:02,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:02,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash 71425160, now seen corresponding path program 5 times [2023-08-23 22:42:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:02,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851804038] [2023-08-23 22:42:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:02,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:02,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851804038] [2023-08-23 22:42:02,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851804038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:02,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735503074] [2023-08-23 22:42:02,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:42:02,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:02,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:02,634 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) [2023-08-23 22:42:02,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-23 22:42:02,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-23 22:42:02,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:02,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-23 22:42:02,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:02,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:02,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735503074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:02,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:02,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-23 22:42:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013255840] [2023-08-23 22:42:02,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-23 22:42:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-23 22:42:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-23 22:42:02,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:02,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 781 flow. Second operand has 17 states, 17 states have (on average 54.8235294117647) internal successors, (932), 17 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:02,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:02,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:03,186 INFO L124 PetriNetUnfolderBase]: 412/755 cut-off events. [2023-08-23 22:42:03,186 INFO L125 PetriNetUnfolderBase]: For 12133/12133 co-relation queries the response was YES. [2023-08-23 22:42:03,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 755 events. 412/755 cut-off events. For 12133/12133 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3352 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3976. Up to 227 conditions per place. [2023-08-23 22:42:03,190 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-08-23 22:42:03,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2101 flow [2023-08-23 22:42:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-23 22:42:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-23 22:42:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1280 transitions. [2023-08-23 22:42:03,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-23 22:42:03,193 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1280 transitions. [2023-08-23 22:42:03,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1280 transitions. [2023-08-23 22:42:03,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:03,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1280 transitions. [2023-08-23 22:42:03,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.18181818181818) internal successors, (1280), 22 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:03,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 128.0) internal successors, (2944), 23 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:03,198 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 128.0) internal successors, (2944), 23 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:03,198 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 781 flow. Second operand 22 states and 1280 transitions. [2023-08-23 22:42:03,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2101 flow [2023-08-23 22:42:03,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1980 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-08-23 22:42:03,238 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1490 flow [2023-08-23 22:42:03,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1490, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-08-23 22:42:03,239 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-08-23 22:42:03,239 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1490 flow [2023-08-23 22:42:03,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.8235294117647) internal successors, (932), 17 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:03,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:03,240 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:03,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:03,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:03,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:03,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash 527212936, now seen corresponding path program 6 times [2023-08-23 22:42:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:03,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302190632] [2023-08-23 22:42:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:03,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:03,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302190632] [2023-08-23 22:42:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302190632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674255505] [2023-08-23 22:42:03,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-23 22:42:03,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:03,522 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) [2023-08-23 22:42:03,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-23 22:42:03,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-23 22:42:03,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:03,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-23 22:42:03,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:03,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:03,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674255505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:03,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:03,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-23 22:42:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866839887] [2023-08-23 22:42:03,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:03,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-23 22:42:03,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-23 22:42:03,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-23 22:42:03,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:03,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1490 flow. Second operand has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:03,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:03,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:03,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:04,058 INFO L124 PetriNetUnfolderBase]: 612/1111 cut-off events. [2023-08-23 22:42:04,058 INFO L125 PetriNetUnfolderBase]: For 38007/38007 co-relation queries the response was YES. [2023-08-23 22:42:04,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1111 events. 612/1111 cut-off events. For 38007/38007 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5400 event pairs, 35 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7772. Up to 355 conditions per place. [2023-08-23 22:42:04,066 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2023-08-23 22:42:04,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3764 flow [2023-08-23 22:42:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-23 22:42:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-23 22:42:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1571 transitions. [2023-08-23 22:42:04,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45457175925925924 [2023-08-23 22:42:04,070 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1571 transitions. [2023-08-23 22:42:04,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1571 transitions. [2023-08-23 22:42:04,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:04,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1571 transitions. [2023-08-23 22:42:04,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.18518518518518) internal successors, (1571), 27 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:04,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 128.0) internal successors, (3584), 28 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:04,077 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 128.0) internal successors, (3584), 28 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:04,077 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1490 flow. Second operand 27 states and 1571 transitions. [2023-08-23 22:42:04,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3764 flow [2023-08-23 22:42:04,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3448 flow, removed 148 selfloop flow, removed 4 redundant places. [2023-08-23 22:42:04,125 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2642 flow [2023-08-23 22:42:04,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2642, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2023-08-23 22:42:04,126 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-08-23 22:42:04,126 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2642 flow [2023-08-23 22:42:04,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:04,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:04,127 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:04,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:04,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:04,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:04,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1394490875, now seen corresponding path program 7 times [2023-08-23 22:42:04,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:04,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558165140] [2023-08-23 22:42:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:04,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:04,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:04,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558165140] [2023-08-23 22:42:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558165140] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:04,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152902323] [2023-08-23 22:42:04,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-23 22:42:04,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:04,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:04,448 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) [2023-08-23 22:42:04,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-23 22:42:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:04,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-23 22:42:04,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:04,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:42:04,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152902323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:04,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:04,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-23 22:42:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692607496] [2023-08-23 22:42:04,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:04,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-23 22:42:04,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-23 22:42:04,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-08-23 22:42:04,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:04,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2642 flow. Second operand has 18 states, 18 states have (on average 54.72222222222222) internal successors, (985), 18 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) [2023-08-23 22:42:04,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:04,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:04,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:05,259 INFO L124 PetriNetUnfolderBase]: 756/1375 cut-off events. [2023-08-23 22:42:05,259 INFO L125 PetriNetUnfolderBase]: For 83402/83402 co-relation queries the response was YES. [2023-08-23 22:42:05,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 1375 events. 756/1375 cut-off events. For 83402/83402 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6896 event pairs, 12 based on Foata normal form. 40/1415 useless extension candidates. Maximal degree in co-relation 12465. Up to 458 conditions per place. [2023-08-23 22:42:05,271 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 62 selfloop transitions, 176 changer transitions 54/292 dead transitions. [2023-08-23 22:42:05,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 292 transitions, 6017 flow [2023-08-23 22:42:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-23 22:42:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-23 22:42:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1744 transitions. [2023-08-23 22:42:05,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2023-08-23 22:42:05,273 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1744 transitions. [2023-08-23 22:42:05,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1744 transitions. [2023-08-23 22:42:05,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:05,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1744 transitions. [2023-08-23 22:42:05,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.13333333333333) internal successors, (1744), 30 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:05,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 128.0) internal successors, (3968), 31 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:05,279 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 128.0) internal successors, (3968), 31 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:05,279 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2642 flow. Second operand 30 states and 1744 transitions. [2023-08-23 22:42:05,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 292 transitions, 6017 flow [2023-08-23 22:42:05,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 292 transitions, 4596 flow, removed 681 selfloop flow, removed 11 redundant places. [2023-08-23 22:42:05,392 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 3515 flow [2023-08-23 22:42:05,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3515, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2023-08-23 22:42:05,393 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 168 predicate places. [2023-08-23 22:42:05,393 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 3515 flow [2023-08-23 22:42:05,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.72222222222222) internal successors, (985), 18 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) [2023-08-23 22:42:05,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:05,394 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:05,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:05,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-23 22:42:05,597 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:05,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1391431136, now seen corresponding path program 8 times [2023-08-23 22:42:05,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:05,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701663592] [2023-08-23 22:42:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:05,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:05,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:05,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701663592] [2023-08-23 22:42:05,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701663592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:05,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047155385] [2023-08-23 22:42:05,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:42:05,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:05,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:05,761 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) [2023-08-23 22:42:05,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-23 22:42:05,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:42:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:05,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-23 22:42:05,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:05,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:06,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047155385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:06,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:06,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-08-23 22:42:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001056294] [2023-08-23 22:42:06,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:06,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-23 22:42:06,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:06,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-23 22:42:06,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2023-08-23 22:42:06,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:06,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 3515 flow. Second operand has 30 states, 30 states have (on average 54.36666666666667) internal successors, (1631), 30 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:06,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:06,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:06,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:07,189 INFO L124 PetriNetUnfolderBase]: 940/1683 cut-off events. [2023-08-23 22:42:07,189 INFO L125 PetriNetUnfolderBase]: For 117738/117738 co-relation queries the response was YES. [2023-08-23 22:42:07,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16451 conditions, 1683 events. 940/1683 cut-off events. For 117738/117738 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7991 event pairs, 18 based on Foata normal form. 52/1735 useless extension candidates. Maximal degree in co-relation 16366. Up to 574 conditions per place. [2023-08-23 22:42:07,206 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 90 selfloop transitions, 222 changer transitions 98/410 dead transitions. [2023-08-23 22:42:07,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 410 transitions, 8862 flow [2023-08-23 22:42:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-23 22:42:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-23 22:42:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3014 transitions. [2023-08-23 22:42:07,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528245192307692 [2023-08-23 22:42:07,210 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3014 transitions. [2023-08-23 22:42:07,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3014 transitions. [2023-08-23 22:42:07,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:07,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3014 transitions. [2023-08-23 22:42:07,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.96153846153846) internal successors, (3014), 52 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:07,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 128.0) internal successors, (6784), 53 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:07,220 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 128.0) internal successors, (6784), 53 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:07,220 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 3515 flow. Second operand 52 states and 3014 transitions. [2023-08-23 22:42:07,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 410 transitions, 8862 flow [2023-08-23 22:42:07,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 410 transitions, 7981 flow, removed 412 selfloop flow, removed 8 redundant places. [2023-08-23 22:42:07,369 INFO L231 Difference]: Finished difference. Result has 255 places, 248 transitions, 5156 flow [2023-08-23 22:42:07,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5156, PETRI_PLACES=255, PETRI_TRANSITIONS=248} [2023-08-23 22:42:07,370 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 237 predicate places. [2023-08-23 22:42:07,370 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 248 transitions, 5156 flow [2023-08-23 22:42:07,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 54.36666666666667) internal successors, (1631), 30 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:07,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:07,371 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:07,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:07,571 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:07,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2006552916, now seen corresponding path program 9 times [2023-08-23 22:42:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559965947] [2023-08-23 22:42:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:07,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:07,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559965947] [2023-08-23 22:42:07,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559965947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:07,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701709073] [2023-08-23 22:42:07,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:42:07,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:07,932 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) [2023-08-23 22:42:07,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-23 22:42:08,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-08-23 22:42:08,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:08,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-23 22:42:08,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:08,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:08,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701709073] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:08,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:08,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 44 [2023-08-23 22:42:08,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316945058] [2023-08-23 22:42:08,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:08,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-23 22:42:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-23 22:42:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2023-08-23 22:42:08,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:08,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 248 transitions, 5156 flow. Second operand has 46 states, 46 states have (on average 54.23913043478261) internal successors, (2495), 46 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:08,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:08,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:08,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:09,847 INFO L124 PetriNetUnfolderBase]: 1308/2419 cut-off events. [2023-08-23 22:42:09,847 INFO L125 PetriNetUnfolderBase]: For 331751/331751 co-relation queries the response was YES. [2023-08-23 22:42:09,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32030 conditions, 2419 events. 1308/2419 cut-off events. For 331751/331751 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12214 event pairs, 238 based on Foata normal form. 80/2499 useless extension candidates. Maximal degree in co-relation 31919. Up to 993 conditions per place. [2023-08-23 22:42:09,882 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 215 selfloop transitions, 181 changer transitions 93/489 dead transitions. [2023-08-23 22:42:09,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 489 transitions, 14145 flow [2023-08-23 22:42:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-23 22:42:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-23 22:42:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2826 transitions. [2023-08-23 22:42:09,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45057397959183676 [2023-08-23 22:42:09,886 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2826 transitions. [2023-08-23 22:42:09,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2826 transitions. [2023-08-23 22:42:09,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:09,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2826 transitions. [2023-08-23 22:42:09,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.673469387755105) internal successors, (2826), 49 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:09,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 128.0) internal successors, (6400), 50 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:09,905 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 128.0) internal successors, (6400), 50 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:09,906 INFO L175 Difference]: Start difference. First operand has 255 places, 248 transitions, 5156 flow. Second operand 49 states and 2826 transitions. [2023-08-23 22:42:09,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 489 transitions, 14145 flow [2023-08-23 22:42:10,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 489 transitions, 10914 flow, removed 1538 selfloop flow, removed 16 redundant places. [2023-08-23 22:42:10,676 INFO L231 Difference]: Finished difference. Result has 309 places, 342 transitions, 7120 flow [2023-08-23 22:42:10,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7120, PETRI_PLACES=309, PETRI_TRANSITIONS=342} [2023-08-23 22:42:10,676 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 291 predicate places. [2023-08-23 22:42:10,676 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 342 transitions, 7120 flow [2023-08-23 22:42:10,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 54.23913043478261) internal successors, (2495), 46 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:10,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:10,677 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:10,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:10,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:10,882 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:10,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:10,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1210583104, now seen corresponding path program 10 times [2023-08-23 22:42:10,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:10,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589174572] [2023-08-23 22:42:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:10,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:11,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589174572] [2023-08-23 22:42:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589174572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452260390] [2023-08-23 22:42:11,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:42:11,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:11,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:11,256 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) [2023-08-23 22:42:11,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-23 22:42:11,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:42:11,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:11,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-23 22:42:11,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:11,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:11,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452260390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:11,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:11,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2023-08-23 22:42:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763122763] [2023-08-23 22:42:11,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:11,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-23 22:42:11,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-23 22:42:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=2088, Unknown=0, NotChecked=0, Total=2550 [2023-08-23 22:42:11,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:11,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 342 transitions, 7120 flow. Second operand has 51 states, 51 states have (on average 54.23529411764706) internal successors, (2766), 51 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:11,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:11,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:11,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:13,973 INFO L124 PetriNetUnfolderBase]: 1648/3095 cut-off events. [2023-08-23 22:42:13,974 INFO L125 PetriNetUnfolderBase]: For 750279/750279 co-relation queries the response was YES. [2023-08-23 22:42:13,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46582 conditions, 3095 events. 1648/3095 cut-off events. For 750279/750279 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 16276 event pairs, 62 based on Foata normal form. 80/3175 useless extension candidates. Maximal degree in co-relation 46448. Up to 1262 conditions per place. [2023-08-23 22:42:14,007 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 127 selfloop transitions, 365 changer transitions 115/607 dead transitions. [2023-08-23 22:42:14,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 607 transitions, 17010 flow [2023-08-23 22:42:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-23 22:42:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-23 22:42:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3466 transitions. [2023-08-23 22:42:14,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513020833333333 [2023-08-23 22:42:14,011 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3466 transitions. [2023-08-23 22:42:14,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3466 transitions. [2023-08-23 22:42:14,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:14,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3466 transitions. [2023-08-23 22:42:14,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.766666666666666) internal successors, (3466), 60 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:14,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 128.0) internal successors, (7808), 61 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:14,021 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 128.0) internal successors, (7808), 61 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:14,022 INFO L175 Difference]: Start difference. First operand has 309 places, 342 transitions, 7120 flow. Second operand 60 states and 3466 transitions. [2023-08-23 22:42:14,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 607 transitions, 17010 flow [2023-08-23 22:42:15,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 607 transitions, 15248 flow, removed 837 selfloop flow, removed 19 redundant places. [2023-08-23 22:42:15,470 INFO L231 Difference]: Finished difference. Result has 372 places, 429 transitions, 9839 flow [2023-08-23 22:42:15,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9839, PETRI_PLACES=372, PETRI_TRANSITIONS=429} [2023-08-23 22:42:15,471 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 354 predicate places. [2023-08-23 22:42:15,471 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 429 transitions, 9839 flow [2023-08-23 22:42:15,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 54.23529411764706) internal successors, (2766), 51 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:15,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:15,472 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:15,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:15,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-23 22:42:15,677 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:15,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:15,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1277267076, now seen corresponding path program 11 times [2023-08-23 22:42:15,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:15,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834667540] [2023-08-23 22:42:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:15,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:15,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834667540] [2023-08-23 22:42:15,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834667540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:15,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824042403] [2023-08-23 22:42:15,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:42:15,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:15,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:15,974 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) [2023-08-23 22:42:15,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-23 22:42:16,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-08-23 22:42:16,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:16,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-23 22:42:16,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:16,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:16,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824042403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:16,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:16,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-08-23 22:42:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597058690] [2023-08-23 22:42:16,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:16,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-23 22:42:16,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:16,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-23 22:42:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2023-08-23 22:42:16,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:16,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 429 transitions, 9839 flow. Second operand has 50 states, 50 states have (on average 54.2) internal successors, (2710), 50 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:16,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:16,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:16,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:18,849 INFO L124 PetriNetUnfolderBase]: 2016/3767 cut-off events. [2023-08-23 22:42:18,849 INFO L125 PetriNetUnfolderBase]: For 1420773/1420773 co-relation queries the response was YES. [2023-08-23 22:42:18,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69420 conditions, 3767 events. 2016/3767 cut-off events. For 1420773/1420773 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 19994 event pairs, 29 based on Foata normal form. 80/3847 useless extension candidates. Maximal degree in co-relation 69273. Up to 1558 conditions per place. [2023-08-23 22:42:18,897 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 131 selfloop transitions, 479 changer transitions 117/727 dead transitions. [2023-08-23 22:42:18,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 727 transitions, 24687 flow [2023-08-23 22:42:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-23 22:42:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-23 22:42:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4218 transitions. [2023-08-23 22:42:18,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514126712328767 [2023-08-23 22:42:18,901 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4218 transitions. [2023-08-23 22:42:18,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4218 transitions. [2023-08-23 22:42:18,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:18,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4218 transitions. [2023-08-23 22:42:18,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 57.78082191780822) internal successors, (4218), 73 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:18,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 128.0) internal successors, (9472), 74 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:18,998 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 128.0) internal successors, (9472), 74 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:18,998 INFO L175 Difference]: Start difference. First operand has 372 places, 429 transitions, 9839 flow. Second operand 73 states and 4218 transitions. [2023-08-23 22:42:18,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 727 transitions, 24687 flow [2023-08-23 22:42:21,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 727 transitions, 21646 flow, removed 1419 selfloop flow, removed 19 redundant places. [2023-08-23 22:42:21,467 INFO L231 Difference]: Finished difference. Result has 454 places, 511 transitions, 13137 flow [2023-08-23 22:42:21,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=7544, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=13137, PETRI_PLACES=454, PETRI_TRANSITIONS=511} [2023-08-23 22:42:21,467 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 436 predicate places. [2023-08-23 22:42:21,467 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 511 transitions, 13137 flow [2023-08-23 22:42:21,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 54.2) internal successors, (2710), 50 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:21,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:21,468 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:21,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-23 22:42:21,669 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:21,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:21,669 INFO L85 PathProgramCache]: Analyzing trace with hash -375184893, now seen corresponding path program 12 times [2023-08-23 22:42:21,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:21,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636632641] [2023-08-23 22:42:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:21,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:22,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636632641] [2023-08-23 22:42:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636632641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099354439] [2023-08-23 22:42:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-23 22:42:22,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:22,054 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:42:22,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-23 22:42:22,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-08-23 22:42:22,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:22,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-23 22:42:22,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:22,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099354439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:22,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:22,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2023-08-23 22:42:22,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799736283] [2023-08-23 22:42:22,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:22,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-23 22:42:22,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-23 22:42:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1875, Unknown=0, NotChecked=0, Total=2450 [2023-08-23 22:42:22,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:22,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 511 transitions, 13137 flow. Second operand has 50 states, 50 states have (on average 54.24) internal successors, (2712), 50 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:22,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:22,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:22,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:26,468 INFO L124 PetriNetUnfolderBase]: 2448/4559 cut-off events. [2023-08-23 22:42:26,468 INFO L125 PetriNetUnfolderBase]: For 2614986/2614986 co-relation queries the response was YES. [2023-08-23 22:42:26,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101832 conditions, 4559 events. 2448/4559 cut-off events. For 2614986/2614986 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 24461 event pairs, 22 based on Foata normal form. 76/4635 useless extension candidates. Maximal degree in co-relation 101655. Up to 1894 conditions per place. [2023-08-23 22:42:26,531 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 141 selfloop transitions, 599 changer transitions 176/916 dead transitions. [2023-08-23 22:42:26,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 916 transitions, 38162 flow [2023-08-23 22:42:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-23 22:42:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-23 22:42:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5261 transitions. [2023-08-23 22:42:26,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45166552197802196 [2023-08-23 22:42:26,535 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5261 transitions. [2023-08-23 22:42:26,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5261 transitions. [2023-08-23 22:42:26,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:26,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5261 transitions. [2023-08-23 22:42:26,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 57.81318681318681) internal successors, (5261), 91 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:26,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 128.0) internal successors, (11776), 92 states have internal predecessors, (11776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:26,549 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 128.0) internal successors, (11776), 92 states have internal predecessors, (11776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:26,549 INFO L175 Difference]: Start difference. First operand has 454 places, 511 transitions, 13137 flow. Second operand 91 states and 5261 transitions. [2023-08-23 22:42:26,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 916 transitions, 38162 flow [2023-08-23 22:42:30,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 916 transitions, 30414 flow, removed 3649 selfloop flow, removed 27 redundant places. [2023-08-23 22:42:30,115 INFO L231 Difference]: Finished difference. Result has 551 places, 631 transitions, 17196 flow [2023-08-23 22:42:30,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=9237, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=17196, PETRI_PLACES=551, PETRI_TRANSITIONS=631} [2023-08-23 22:42:30,116 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 533 predicate places. [2023-08-23 22:42:30,116 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 631 transitions, 17196 flow [2023-08-23 22:42:30,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 54.24) internal successors, (2712), 50 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:30,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:30,116 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:30,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:30,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-23 22:42:30,317 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:30,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:30,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1531420907, now seen corresponding path program 13 times [2023-08-23 22:42:30,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:30,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055190526] [2023-08-23 22:42:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:30,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:30,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:30,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055190526] [2023-08-23 22:42:30,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055190526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:30,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633425093] [2023-08-23 22:42:30,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-23 22:42:30,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:30,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:30,609 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:42:30,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-23 22:42:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:30,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-23 22:42:30,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:30,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-23 22:42:30,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633425093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:42:30,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-23 22:42:30,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2023-08-23 22:42:30,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807549175] [2023-08-23 22:42:30,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:42:30,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-23 22:42:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:30,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-23 22:42:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2023-08-23 22:42:30,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 128 [2023-08-23 22:42:30,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 631 transitions, 17196 flow. Second operand has 23 states, 23 states have (on average 58.130434782608695) internal successors, (1337), 23 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:30,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:30,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 128 [2023-08-23 22:42:30,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:46,135 INFO L124 PetriNetUnfolderBase]: 25488/38728 cut-off events. [2023-08-23 22:42:46,135 INFO L125 PetriNetUnfolderBase]: For 30605435/30605435 co-relation queries the response was YES. [2023-08-23 22:42:46,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897575 conditions, 38728 events. 25488/38728 cut-off events. For 30605435/30605435 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 242811 event pairs, 291 based on Foata normal form. 1017/39745 useless extension candidates. Maximal degree in co-relation 897365. Up to 15197 conditions per place. [2023-08-23 22:42:46,892 INFO L140 encePairwiseOnDemand]: 125/128 looper letters, 0 selfloop transitions, 0 changer transitions 7638/7638 dead transitions. [2023-08-23 22:42:46,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 7638 transitions, 186017 flow [2023-08-23 22:42:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-23 22:42:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-23 22:42:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1465 transitions. [2023-08-23 22:42:46,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976222826086957 [2023-08-23 22:42:46,894 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1465 transitions. [2023-08-23 22:42:46,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1465 transitions. [2023-08-23 22:42:46,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:46,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1465 transitions. [2023-08-23 22:42:46,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.69565217391305) internal successors, (1465), 23 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:46,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 128.0) internal successors, (3072), 24 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:46,897 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 128.0) internal successors, (3072), 24 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:46,897 INFO L175 Difference]: Start difference. First operand has 551 places, 631 transitions, 17196 flow. Second operand 23 states and 1465 transitions. [2023-08-23 22:42:46,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 7638 transitions, 186017 flow [2023-08-23 22:43:45,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 7638 transitions, 152462 flow, removed 9715 selfloop flow, removed 59 redundant places. [2023-08-23 22:43:45,402 INFO L231 Difference]: Finished difference. Result has 512 places, 0 transitions, 0 flow [2023-08-23 22:43:45,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=11196, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=512, PETRI_TRANSITIONS=0} [2023-08-23 22:43:45,403 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 494 predicate places. [2023-08-23 22:43:45,403 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 0 transitions, 0 flow [2023-08-23 22:43:45,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 58.130434782608695) internal successors, (1337), 23 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:45,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-23 22:43:45,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-23 22:43:45,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-23 22:43:45,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-23 22:43:45,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-23 22:43:45,607 INFO L445 BasicCegarLoop]: Path program histogram: [13, 2, 1] [2023-08-23 22:43:45,609 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-23 22:43:45,609 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 22:43:45,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 10:43:45 BasicIcfg [2023-08-23 22:43:45,612 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 22:43:45,612 INFO L158 Benchmark]: Toolchain (without parser) took 108079.62ms. Allocated memory was 381.7MB in the beginning and 9.3GB in the end (delta: 8.9GB). Free memory was 356.8MB in the beginning and 5.2GB in the end (delta: -4.8GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. [2023-08-23 22:43:45,613 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 381.7MB. Free memory was 359.9MB in the beginning and 359.8MB in the end (delta: 91.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:43:45,613 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.82ms. Allocated memory is still 381.7MB. Free memory was 356.8MB in the beginning and 337.4MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-23 22:43:45,613 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.89ms. Allocated memory is still 381.7MB. Free memory was 337.4MB in the beginning and 335.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:45,613 INFO L158 Benchmark]: Boogie Preprocessor took 27.10ms. Allocated memory is still 381.7MB. Free memory was 335.3MB in the beginning and 333.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:45,613 INFO L158 Benchmark]: RCFGBuilder took 295.81ms. Allocated memory is still 381.7MB. Free memory was 333.8MB in the beginning and 321.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-23 22:43:45,613 INFO L158 Benchmark]: TraceAbstraction took 107380.82ms. Allocated memory was 381.7MB in the beginning and 9.3GB in the end (delta: 8.9GB). Free memory was 320.6MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-08-23 22:43:45,614 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 381.7MB. Free memory was 359.9MB in the beginning and 359.8MB in the end (delta: 91.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 327.82ms. Allocated memory is still 381.7MB. Free memory was 356.8MB in the beginning and 337.4MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.89ms. Allocated memory is still 381.7MB. Free memory was 337.4MB in the beginning and 335.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.10ms. Allocated memory is still 381.7MB. Free memory was 335.3MB in the beginning and 333.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 295.81ms. Allocated memory is still 381.7MB. Free memory was 333.8MB in the beginning and 321.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 107380.82ms. Allocated memory was 381.7MB in the beginning and 9.3GB in the end (delta: 8.9GB). Free memory was 320.6MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 68 PlacesBefore, 18 PlacesAfterwards, 66 TransitionsBefore, 14 TransitionsAfterwards, 1200 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 60 TotalNumberOfCompositions, 1095 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 977, independent: 951, independent conditional: 0, independent unconditional: 951, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 646, independent: 636, independent conditional: 0, independent unconditional: 636, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 977, independent: 315, independent conditional: 0, independent unconditional: 315, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 646, unknown conditional: 0, unknown unconditional: 646] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 107.3s, OverallIterations: 16, TraceHistogramMax: 21, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 96.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5079 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5079 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 397 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4116 IncrementalHoareTripleChecker+Invalid, 4513 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 397 mSolverCounterUnsat, 0 mSDtfsCounter, 4116 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1044 GetRequests, 302 SyntacticMatches, 15 SemanticMatches, 727 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18772 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17196occurred in iteration=15, InterpolantAutomatonStates: 489, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 566 NumberOfCodeBlocks, 566 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 742 ConstructedInterpolants, 0 QuantifiedInterpolants, 3158 SizeOfPredicates, 129 NumberOfNonLiveVariables, 2080 ConjunctsInSsa, 211 ConjunctsInUnsatCore, 37 InterpolantComputations, 6 PerfectInterpolantSequences, 792/2480 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-23 22:43:45,636 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 0 Received shutdown request...