/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-ext/31_simple_loop5_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:49:01,980 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:49:02,071 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 22:49:02,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:49:02,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:49:02,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:49:02,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:49:02,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:49:02,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:49:02,113 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:49:02,113 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:49:02,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:49:02,113 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:49:02,114 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:49:02,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:49:02,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:49:02,115 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:49:02,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:49:02,115 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:49:02,116 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:49:02,116 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:49:02,117 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:49:02,117 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:49:02,117 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:49:02,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:49:02,118 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:49:02,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:49:02,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:49:02,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:49:02,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:49:02,119 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:49:02,120 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:49:02,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:49:02,120 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:49:02,120 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:49:02,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:49:02,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:49:02,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:49:02,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:49:02,450 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:49:02,450 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:49:02,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-23 22:49:03,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:49:03,877 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:49:03,878 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-23 22:49:03,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2e55b00/153b9ecbe2e0434983d89f3fdf5097bc/FLAGefff0767a [2023-08-23 22:49:03,905 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2e55b00/153b9ecbe2e0434983d89f3fdf5097bc [2023-08-23 22:49:03,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:49:03,908 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:49:03,909 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:49:03,909 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:49:03,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:49:03,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:49:03" (1/1) ... [2023-08-23 22:49:03,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b6505af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:03, skipping insertion in model container [2023-08-23 22:49:03,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:49:03" (1/1) ... [2023-08-23 22:49:03,952 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:49:04,169 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-ext/31_simple_loop5_vs.i[30438,30451] [2023-08-23 22:49:04,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:49:04,184 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:49:04,222 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-23 22:49:04,223 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-23 22:49:04,239 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-ext/31_simple_loop5_vs.i[30438,30451] [2023-08-23 22:49:04,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:49:04,281 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:49:04,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04 WrapperNode [2023-08-23 22:49:04,282 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:49:04,283 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:49:04,283 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:49:04,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:49:04,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,341 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2023-08-23 22:49:04,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:49:04,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:49:04,344 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:49:04,344 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:49:04,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,357 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,357 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,373 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,375 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,377 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,379 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:49:04,380 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:49:04,380 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:49:04,380 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:49:04,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (1/1) ... [2023-08-23 22:49:04,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:49:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:49:04,419 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 22:49:04,443 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 22:49:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-23 22:49:04,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-23 22:49:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:49:04,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:49:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:49:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:49:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:49:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:49:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:49:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:49:04,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:49:04,460 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 22:49:04,600 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:49:04,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:49:04,775 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:49:04,818 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:49:04,818 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-23 22:49:04,825 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:49:04 BoogieIcfgContainer [2023-08-23 22:49:04,825 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:49:04,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:49:04,827 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:49:04,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:49:04,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:49:03" (1/3) ... [2023-08-23 22:49:04,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c407fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:49:04, skipping insertion in model container [2023-08-23 22:49:04,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:49:04" (2/3) ... [2023-08-23 22:49:04,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c407fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:49:04, skipping insertion in model container [2023-08-23 22:49:04,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:49:04" (3/3) ... [2023-08-23 22:49:04,832 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-08-23 22:49:04,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:49:04,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:49:04,848 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:49:04,910 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:49:04,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 132 flow [2023-08-23 22:49:04,969 INFO L124 PetriNetUnfolderBase]: 7/70 cut-off events. [2023-08-23 22:49:04,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:49:04,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-08-23 22:49:04,974 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 61 transitions, 132 flow [2023-08-23 22:49:04,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 60 transitions, 128 flow [2023-08-23 22:49:04,980 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:49:04,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 60 transitions, 128 flow [2023-08-23 22:49:04,994 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 60 transitions, 128 flow [2023-08-23 22:49:04,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 60 transitions, 128 flow [2023-08-23 22:49:05,010 INFO L124 PetriNetUnfolderBase]: 7/70 cut-off events. [2023-08-23 22:49:05,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:49:05,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 7/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-08-23 22:49:05,012 INFO L119 LiptonReduction]: Number of co-enabled transitions 1040 [2023-08-23 22:49:06,241 INFO L134 LiptonReduction]: Checked pairs total: 1951 [2023-08-23 22:49:06,241 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-23 22:49:06,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:49:06,269 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;@d772f08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:49:06,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 22:49:06,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:49:06,278 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-23 22:49:06,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:49:06,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:06,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:49:06,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 22:49:06,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash 312627833, now seen corresponding path program 1 times [2023-08-23 22:49:06,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:06,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80560317] [2023-08-23 22:49:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:06,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:06,516 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 22:49:06,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80560317] [2023-08-23 22:49:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80560317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:06,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:06,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:49:06,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307978443] [2023-08-23 22:49:06,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:06,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:49:06,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:49:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:49:06,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 104 [2023-08-23 22:49:06,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 22:49:06,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:06,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 104 [2023-08-23 22:49:06,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:06,672 INFO L124 PetriNetUnfolderBase]: 172/292 cut-off events. [2023-08-23 22:49:06,672 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:49:06,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 292 events. 172/292 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 973 event pairs, 49 based on Foata normal form. 12/279 useless extension candidates. Maximal degree in co-relation 584. Up to 205 conditions per place. [2023-08-23 22:49:06,678 INFO L140 encePairwiseOnDemand]: 96/104 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-23 22:49:06,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 102 flow [2023-08-23 22:49:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:49:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:49:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2023-08-23 22:49:06,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2023-08-23 22:49:06,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2023-08-23 22:49:06,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2023-08-23 22:49:06,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:06,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2023-08-23 22:49:06,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 22:49:06,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 22:49:06,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 22:49:06,712 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 52 flow. Second operand 3 states and 151 transitions. [2023-08-23 22:49:06,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 102 flow [2023-08-23 22:49:06,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:49:06,716 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 57 flow [2023-08-23 22:49:06,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-08-23 22:49:06,724 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-08-23 22:49:06,724 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 57 flow [2023-08-23 22:49:06,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 22:49:06,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:06,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:49:06,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 22:49:06,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1213610001, now seen corresponding path program 1 times [2023-08-23 22:49:06,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:06,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99701252] [2023-08-23 22:49:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:49:06,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:49:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:49:06,817 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:49:06,817 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:49:06,819 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-23 22:49:06,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-23 22:49:06,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-23 22:49:06,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-23 22:49:06,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:49:06,821 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:49:06,824 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:49:06,825 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 22:49:06,847 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:49:06,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 88 transitions, 200 flow [2023-08-23 22:49:06,869 INFO L124 PetriNetUnfolderBase]: 10/95 cut-off events. [2023-08-23 22:49:06,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:49:06,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 104. Up to 6 conditions per place. [2023-08-23 22:49:06,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 88 transitions, 200 flow [2023-08-23 22:49:06,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 73 transitions, 161 flow [2023-08-23 22:49:06,874 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:49:06,874 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 73 transitions, 161 flow [2023-08-23 22:49:06,874 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 73 transitions, 161 flow [2023-08-23 22:49:06,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 161 flow [2023-08-23 22:49:06,888 INFO L124 PetriNetUnfolderBase]: 10/95 cut-off events. [2023-08-23 22:49:06,889 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:49:06,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 95 events. 10/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-23 22:49:06,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 2002 [2023-08-23 22:49:08,031 INFO L134 LiptonReduction]: Checked pairs total: 5986 [2023-08-23 22:49:08,031 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-08-23 22:49:08,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:49:08,034 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;@d772f08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:49:08,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-23 22:49:08,035 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:49:08,035 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-23 22:49:08,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:49:08,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:08,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:49:08,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:49:08,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash 466134105, now seen corresponding path program 1 times [2023-08-23 22:49:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906879774] [2023-08-23 22:49:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:08,115 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 22:49:08,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906879774] [2023-08-23 22:49:08,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906879774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:08,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:08,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:49:08,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248276775] [2023-08-23 22:49:08,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:08,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:49:08,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:49:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:49:08,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 134 [2023-08-23 22:49:08,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 22:49:08,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:08,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 134 [2023-08-23 22:49:08,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:08,301 INFO L124 PetriNetUnfolderBase]: 1215/1873 cut-off events. [2023-08-23 22:49:08,301 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2023-08-23 22:49:08,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3746 conditions, 1873 events. 1215/1873 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9609 event pairs, 283 based on Foata normal form. 0/1791 useless extension candidates. Maximal degree in co-relation 3735. Up to 1432 conditions per place. [2023-08-23 22:49:08,314 INFO L140 encePairwiseOnDemand]: 125/134 looper letters, 28 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-23 22:49:08,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 160 flow [2023-08-23 22:49:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:49:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:49:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-08-23 22:49:08,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2023-08-23 22:49:08,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-08-23 22:49:08,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-08-23 22:49:08,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:08,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-08-23 22:49:08,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 22:49:08,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 22:49:08,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 22:49:08,322 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 81 flow. Second operand 3 states and 192 transitions. [2023-08-23 22:49:08,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 160 flow [2023-08-23 22:49:08,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 157 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-23 22:49:08,325 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 87 flow [2023-08-23 22:49:08,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-23 22:49:08,325 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-08-23 22:49:08,326 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 87 flow [2023-08-23 22:49:08,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 22:49:08,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:08,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:08,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:49:08,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:49:08,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:08,327 INFO L85 PathProgramCache]: Analyzing trace with hash -317088850, now seen corresponding path program 1 times [2023-08-23 22:49:08,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:08,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20123929] [2023-08-23 22:49:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:08,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:08,413 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 22:49:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:08,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20123929] [2023-08-23 22:49:08,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20123929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:08,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:08,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:49:08,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223739505] [2023-08-23 22:49:08,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:08,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:49:08,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:49:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:49:08,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 134 [2023-08-23 22:49:08,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 22:49:08,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:08,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 134 [2023-08-23 22:49:08,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:08,458 INFO L124 PetriNetUnfolderBase]: 90/300 cut-off events. [2023-08-23 22:49:08,459 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-23 22:49:08,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 300 events. 90/300 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1431 event pairs, 20 based on Foata normal form. 86/385 useless extension candidates. Maximal degree in co-relation 549. Up to 104 conditions per place. [2023-08-23 22:49:08,460 INFO L140 encePairwiseOnDemand]: 128/134 looper letters, 11 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2023-08-23 22:49:08,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 137 flow [2023-08-23 22:49:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:49:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:49:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-08-23 22:49:08,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049751243781094 [2023-08-23 22:49:08,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-08-23 22:49:08,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-08-23 22:49:08,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:08,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-08-23 22:49:08,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 22:49:08,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 22:49:08,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 22:49:08,465 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 87 flow. Second operand 3 states and 203 transitions. [2023-08-23 22:49:08,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 137 flow [2023-08-23 22:49:08,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:49:08,466 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 96 flow [2023-08-23 22:49:08,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-23 22:49:08,467 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-08-23 22:49:08,467 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 96 flow [2023-08-23 22:49:08,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 22:49:08,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:08,468 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:49:08,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-23 22:49:08,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 301038790, now seen corresponding path program 1 times [2023-08-23 22:49:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:08,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456748449] [2023-08-23 22:49:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:49:08,480 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:49:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:49:08,491 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:49:08,491 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:49:08,491 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-23 22:49:08,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-23 22:49:08,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-23 22:49:08,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-23 22:49:08,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-23 22:49:08,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:49:08,492 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 22:49:08,493 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:49:08,493 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 22:49:08,532 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:49:08,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 272 flow [2023-08-23 22:49:08,543 INFO L124 PetriNetUnfolderBase]: 13/120 cut-off events. [2023-08-23 22:49:08,543 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:49:08,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-23 22:49:08,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 272 flow [2023-08-23 22:49:08,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 86 transitions, 196 flow [2023-08-23 22:49:08,545 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:49:08,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 86 transitions, 196 flow [2023-08-23 22:49:08,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 86 transitions, 196 flow [2023-08-23 22:49:08,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 86 transitions, 196 flow [2023-08-23 22:49:08,554 INFO L124 PetriNetUnfolderBase]: 13/120 cut-off events. [2023-08-23 22:49:08,555 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:49:08,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 120 events. 13/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 113. Up to 8 conditions per place. [2023-08-23 22:49:08,562 INFO L119 LiptonReduction]: Number of co-enabled transitions 3276 [2023-08-23 22:49:09,698 INFO L134 LiptonReduction]: Checked pairs total: 11749 [2023-08-23 22:49:09,698 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-23 22:49:09,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:49:09,701 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;@d772f08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:49:09,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:49:09,703 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:49:09,704 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-23 22:49:09,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:49:09,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:09,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:49:09,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:49:09,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash 650129635, now seen corresponding path program 1 times [2023-08-23 22:49:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80724700] [2023-08-23 22:49:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:09,770 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 22:49:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:09,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80724700] [2023-08-23 22:49:09,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80724700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:09,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:09,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:49:09,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610500635] [2023-08-23 22:49:09,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:09,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:49:09,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:49:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:49:09,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 166 [2023-08-23 22:49:09,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 22:49:09,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:09,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 166 [2023-08-23 22:49:09,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:10,915 INFO L124 PetriNetUnfolderBase]: 9707/13472 cut-off events. [2023-08-23 22:49:10,915 INFO L125 PetriNetUnfolderBase]: For 1447/1447 co-relation queries the response was YES. [2023-08-23 22:49:10,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27132 conditions, 13472 events. 9707/13472 cut-off events. For 1447/1447 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 78260 event pairs, 2171 based on Foata normal form. 0/12948 useless extension candidates. Maximal degree in co-relation 27120. Up to 11498 conditions per place. [2023-08-23 22:49:11,033 INFO L140 encePairwiseOnDemand]: 155/166 looper letters, 37 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-23 22:49:11,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 220 flow [2023-08-23 22:49:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:49:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:49:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-23 22:49:11,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46987951807228917 [2023-08-23 22:49:11,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-23 22:49:11,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-23 22:49:11,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:11,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-23 22:49:11,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 22:49:11,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 22:49:11,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 22:49:11,039 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 110 flow. Second operand 3 states and 234 transitions. [2023-08-23 22:49:11,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 220 flow [2023-08-23 22:49:11,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 211 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-23 22:49:11,044 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 115 flow [2023-08-23 22:49:11,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-23 22:49:11,047 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2023-08-23 22:49:11,048 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 115 flow [2023-08-23 22:49:11,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 22:49:11,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:11,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:49:11,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:49:11,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:11,051 INFO L85 PathProgramCache]: Analyzing trace with hash -277914766, now seen corresponding path program 1 times [2023-08-23 22:49:11,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:11,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729582929] [2023-08-23 22:49:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:11,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:11,140 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 22:49:11,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:11,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729582929] [2023-08-23 22:49:11,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729582929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:11,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:49:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86799101] [2023-08-23 22:49:11,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:11,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:49:11,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:49:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:49:11,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 166 [2023-08-23 22:49:11,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 22:49:11,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:11,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 166 [2023-08-23 22:49:11,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:11,232 INFO L124 PetriNetUnfolderBase]: 240/785 cut-off events. [2023-08-23 22:49:11,232 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-08-23 22:49:11,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 785 events. 240/785 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4868 event pairs, 49 based on Foata normal form. 326/1102 useless extension candidates. Maximal degree in co-relation 1442. Up to 273 conditions per place. [2023-08-23 22:49:11,236 INFO L140 encePairwiseOnDemand]: 158/166 looper letters, 13 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-08-23 22:49:11,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 180 flow [2023-08-23 22:49:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:49:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:49:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-23 22:49:11,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080321285140562 [2023-08-23 22:49:11,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-23 22:49:11,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-23 22:49:11,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:11,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-23 22:49:11,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 22:49:11,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 22:49:11,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 22:49:11,240 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 115 flow. Second operand 3 states and 253 transitions. [2023-08-23 22:49:11,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 180 flow [2023-08-23 22:49:11,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:49:11,243 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 127 flow [2023-08-23 22:49:11,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-23 22:49:11,243 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-23 22:49:11,243 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 127 flow [2023-08-23 22:49:11,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 22:49:11,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:11,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:11,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:49:11,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:49:11,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash -494400844, now seen corresponding path program 1 times [2023-08-23 22:49:11,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:11,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361804944] [2023-08-23 22:49:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:11,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:11,294 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 22:49:11,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361804944] [2023-08-23 22:49:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361804944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:11,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:49:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762913264] [2023-08-23 22:49:11,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:49:11,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:49:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:49:11,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 166 [2023-08-23 22:49:11,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 22:49:11,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:11,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 166 [2023-08-23 22:49:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:11,563 INFO L124 PetriNetUnfolderBase]: 721/1566 cut-off events. [2023-08-23 22:49:11,564 INFO L125 PetriNetUnfolderBase]: For 453/453 co-relation queries the response was YES. [2023-08-23 22:49:11,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4085 conditions, 1566 events. 721/1566 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10777 event pairs, 59 based on Foata normal form. 12/1574 useless extension candidates. Maximal degree in co-relation 4071. Up to 914 conditions per place. [2023-08-23 22:49:11,573 INFO L140 encePairwiseOnDemand]: 155/166 looper letters, 61 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2023-08-23 22:49:11,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 431 flow [2023-08-23 22:49:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:49:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:49:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 411 transitions. [2023-08-23 22:49:11,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126506024096386 [2023-08-23 22:49:11,576 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 411 transitions. [2023-08-23 22:49:11,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 411 transitions. [2023-08-23 22:49:11,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:11,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 411 transitions. [2023-08-23 22:49:11,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.5) internal successors, (411), 6 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 22:49:11,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 22:49:11,580 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 22:49:11,580 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 127 flow. Second operand 6 states and 411 transitions. [2023-08-23 22:49:11,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 431 flow [2023-08-23 22:49:11,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 81 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:49:11,584 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 207 flow [2023-08-23 22:49:11,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-08-23 22:49:11,585 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-23 22:49:11,585 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 207 flow [2023-08-23 22:49:11,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 22:49:11,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:11,586 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:11,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 22:49:11,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-23 22:49:11,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2022817787, now seen corresponding path program 1 times [2023-08-23 22:49:11,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:11,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283170483] [2023-08-23 22:49:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:49:11,604 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:49:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:49:11,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:49:11,625 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:49:11,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-23 22:49:11,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-23 22:49:11,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-23 22:49:11,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-23 22:49:11,625 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-23 22:49:11,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-23 22:49:11,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 22:49:11,626 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-23 22:49:11,627 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:49:11,627 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 22:49:11,661 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:49:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 142 transitions, 348 flow [2023-08-23 22:49:11,679 INFO L124 PetriNetUnfolderBase]: 16/145 cut-off events. [2023-08-23 22:49:11,679 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:49:11,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 284 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 165. Up to 10 conditions per place. [2023-08-23 22:49:11,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 142 transitions, 348 flow [2023-08-23 22:49:11,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 233 flow [2023-08-23 22:49:11,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:49:11,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 233 flow [2023-08-23 22:49:11,682 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 233 flow [2023-08-23 22:49:11,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 233 flow [2023-08-23 22:49:11,691 INFO L124 PetriNetUnfolderBase]: 16/145 cut-off events. [2023-08-23 22:49:11,691 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:49:11,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 145 events. 16/145 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 273 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 144. Up to 10 conditions per place. [2023-08-23 22:49:11,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 4862 [2023-08-23 22:49:12,743 INFO L134 LiptonReduction]: Checked pairs total: 16289 [2023-08-23 22:49:12,743 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-23 22:49:12,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:49:12,745 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;@d772f08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:49:12,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-23 22:49:12,747 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:49:12,747 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-23 22:49:12,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:49:12,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:12,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:49:12,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:49:12,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:12,748 INFO L85 PathProgramCache]: Analyzing trace with hash 864675117, now seen corresponding path program 1 times [2023-08-23 22:49:12,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:12,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115632267] [2023-08-23 22:49:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:12,768 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 22:49:12,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:12,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115632267] [2023-08-23 22:49:12,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115632267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:12,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:12,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:49:12,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989303654] [2023-08-23 22:49:12,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:12,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:49:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:49:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:49:12,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 198 [2023-08-23 22:49:12,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 22:49:12,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:12,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 198 [2023-08-23 22:49:12,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:21,148 INFO L124 PetriNetUnfolderBase]: 106754/138563 cut-off events. [2023-08-23 22:49:21,148 INFO L125 PetriNetUnfolderBase]: For 22554/22554 co-relation queries the response was YES. [2023-08-23 22:49:21,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282183 conditions, 138563 events. 106754/138563 cut-off events. For 22554/22554 co-relation queries the response was YES. Maximal size of possible extension queue 4782. Compared 886592 event pairs, 31159 based on Foata normal form. 0/135389 useless extension candidates. Maximal degree in co-relation 282170. Up to 91906 conditions per place. [2023-08-23 22:49:22,250 INFO L140 encePairwiseOnDemand]: 180/198 looper letters, 49 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2023-08-23 22:49:22,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 316 flow [2023-08-23 22:49:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:49:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:49:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-08-23 22:49:22,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781144781144781 [2023-08-23 22:49:22,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-08-23 22:49:22,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-08-23 22:49:22,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:22,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-08-23 22:49:22,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 22:49:22,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 22:49:22,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 22:49:22,255 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 139 flow. Second operand 3 states and 284 transitions. [2023-08-23 22:49:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 316 flow [2023-08-23 22:49:22,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 297 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-23 22:49:22,276 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 188 flow [2023-08-23 22:49:22,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2023-08-23 22:49:22,277 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-23 22:49:22,277 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 188 flow [2023-08-23 22:49:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 22:49:22,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:22,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-23 22:49:22,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:49:22,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1743963062, now seen corresponding path program 1 times [2023-08-23 22:49:22,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:22,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044162568] [2023-08-23 22:49:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:22,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:22,327 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 22:49:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:22,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044162568] [2023-08-23 22:49:22,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044162568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:22,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:22,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:49:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544107849] [2023-08-23 22:49:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:49:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:49:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:49:22,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 198 [2023-08-23 22:49:22,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 22:49:22,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:22,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 198 [2023-08-23 22:49:22,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:22,527 INFO L124 PetriNetUnfolderBase]: 794/2336 cut-off events. [2023-08-23 22:49:22,527 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-08-23 22:49:22,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 2336 events. 794/2336 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17761 event pairs, 99 based on Foata normal form. 1373/3703 useless extension candidates. Maximal degree in co-relation 4680. Up to 881 conditions per place. [2023-08-23 22:49:22,542 INFO L140 encePairwiseOnDemand]: 188/198 looper letters, 15 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2023-08-23 22:49:22,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 244 flow [2023-08-23 22:49:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:49:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:49:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-08-23 22:49:22,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51010101010101 [2023-08-23 22:49:22,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-08-23 22:49:22,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-08-23 22:49:22,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:22,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-08-23 22:49:22,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 22:49:22,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 22:49:22,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 22:49:22,546 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 188 flow. Second operand 3 states and 303 transitions. [2023-08-23 22:49:22,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 244 flow [2023-08-23 22:49:22,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 224 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-23 22:49:22,552 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 164 flow [2023-08-23 22:49:22,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-23 22:49:22,553 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-23 22:49:22,553 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 164 flow [2023-08-23 22:49:22,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 22:49:22,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:22,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:22,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-23 22:49:22,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:49:22,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash -945521319, now seen corresponding path program 1 times [2023-08-23 22:49:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:22,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408358988] [2023-08-23 22:49:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:22,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:22,620 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 22:49:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408358988] [2023-08-23 22:49:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408358988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:22,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:22,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:49:22,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817445385] [2023-08-23 22:49:22,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:22,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:49:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:49:22,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:49:22,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 198 [2023-08-23 22:49:22,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:49:22,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:22,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 198 [2023-08-23 22:49:22,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:23,106 INFO L124 PetriNetUnfolderBase]: 2359/4757 cut-off events. [2023-08-23 22:49:23,106 INFO L125 PetriNetUnfolderBase]: For 1473/1474 co-relation queries the response was YES. [2023-08-23 22:49:23,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12859 conditions, 4757 events. 2359/4757 cut-off events. For 1473/1474 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 37803 event pairs, 97 based on Foata normal form. 0/4704 useless extension candidates. Maximal degree in co-relation 12844. Up to 3300 conditions per place. [2023-08-23 22:49:23,127 INFO L140 encePairwiseOnDemand]: 184/198 looper letters, 83 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2023-08-23 22:49:23,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 112 transitions, 620 flow [2023-08-23 22:49:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:49:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:49:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2023-08-23 22:49:23,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40824915824915825 [2023-08-23 22:49:23,129 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2023-08-23 22:49:23,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2023-08-23 22:49:23,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:23,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2023-08-23 22:49:23,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 22:49:23,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states 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 22:49:23,132 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states 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 22:49:23,132 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 164 flow. Second operand 6 states and 485 transitions. [2023-08-23 22:49:23,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 112 transitions, 620 flow [2023-08-23 22:49:23,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 112 transitions, 594 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:49:23,139 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 322 flow [2023-08-23 22:49:23,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-23 22:49:23,139 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-23 22:49:23,140 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 322 flow [2023-08-23 22:49:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:49:23,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:23,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:23,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-23 22:49:23,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:49:23,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash -580213840, now seen corresponding path program 2 times [2023-08-23 22:49:23,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:23,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341833174] [2023-08-23 22:49:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:49:23,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:23,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341833174] [2023-08-23 22:49:23,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341833174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:49:23,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530087326] [2023-08-23 22:49:23,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:49:23,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:49:23,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:49:23,319 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 22:49:23,321 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 22:49:23,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:49:23,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:49:23,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-23 22:49:23,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:49:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:49:23,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:49:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:49:23,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530087326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:49:23,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:49:23,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-23 22:49:23,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879610101] [2023-08-23 22:49:23,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:49:23,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-23 22:49:23,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:23,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-23 22:49:23,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-23 22:49:23,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 198 [2023-08-23 22:49:23,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 322 flow. Second operand has 20 states, 20 states have (on average 66.85) internal successors, (1337), 20 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:49:23,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:23,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 198 [2023-08-23 22:49:23,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:49:24,685 INFO L124 PetriNetUnfolderBase]: 3565/7061 cut-off events. [2023-08-23 22:49:24,685 INFO L125 PetriNetUnfolderBase]: For 3147/3148 co-relation queries the response was YES. [2023-08-23 22:49:24,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19579 conditions, 7061 events. 3565/7061 cut-off events. For 3147/3148 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60283 event pairs, 61 based on Foata normal form. 40/7100 useless extension candidates. Maximal degree in co-relation 19559. Up to 3390 conditions per place. [2023-08-23 22:49:24,715 INFO L140 encePairwiseOnDemand]: 180/198 looper letters, 111 selfloop transitions, 45 changer transitions 0/164 dead transitions. [2023-08-23 22:49:24,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 164 transitions, 1043 flow [2023-08-23 22:49:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-23 22:49:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-23 22:49:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 846 transitions. [2023-08-23 22:49:24,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884297520661157 [2023-08-23 22:49:24,718 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 846 transitions. [2023-08-23 22:49:24,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 846 transitions. [2023-08-23 22:49:24,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:49:24,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 846 transitions. [2023-08-23 22:49:24,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.9090909090909) internal successors, (846), 11 states have internal predecessors, (846), 0 states have call successors, (0), 0 states 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 22:49:24,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states 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 22:49:24,729 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 198.0) internal successors, (2376), 12 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states 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 22:49:24,729 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 322 flow. Second operand 11 states and 846 transitions. [2023-08-23 22:49:24,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 164 transitions, 1043 flow [2023-08-23 22:49:24,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 164 transitions, 1043 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:49:24,741 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 603 flow [2023-08-23 22:49:24,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=603, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2023-08-23 22:49:24,742 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2023-08-23 22:49:24,743 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 603 flow [2023-08-23 22:49:24,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.85) internal successors, (1337), 20 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:49:24,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:24,743 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:49:24,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-23 22:49:24,948 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,SelfDestructingSolverStorable12 [2023-08-23 22:49:24,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:49:24,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -988573763, now seen corresponding path program 1 times [2023-08-23 22:49:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:24,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061700863] [2023-08-23 22:49:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:24,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:49:24,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:49:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:49:24,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:49:24,985 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:49:24,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-23 22:49:24,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-23 22:49:24,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-23 22:49:24,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-23 22:49:24,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-23 22:49:24,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-23 22:49:24,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-23 22:49:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-23 22:49:24,987 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-23 22:49:24,987 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:49:24,987 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-23 22:49:25,030 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:49:25,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 169 transitions, 428 flow [2023-08-23 22:49:25,044 INFO L124 PetriNetUnfolderBase]: 19/170 cut-off events. [2023-08-23 22:49:25,044 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-23 22:49:25,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 197. Up to 12 conditions per place. [2023-08-23 22:49:25,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 169 transitions, 428 flow [2023-08-23 22:49:25,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 112 transitions, 272 flow [2023-08-23 22:49:25,046 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:49:25,046 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 112 transitions, 272 flow [2023-08-23 22:49:25,047 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 112 transitions, 272 flow [2023-08-23 22:49:25,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 272 flow [2023-08-23 22:49:25,057 INFO L124 PetriNetUnfolderBase]: 19/170 cut-off events. [2023-08-23 22:49:25,057 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-23 22:49:25,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 170 events. 19/170 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 329 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 176. Up to 12 conditions per place. [2023-08-23 22:49:25,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 6760 [2023-08-23 22:49:26,281 INFO L134 LiptonReduction]: Checked pairs total: 23480 [2023-08-23 22:49:26,282 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-23 22:49:26,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:49:26,283 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;@d772f08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:49:26,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-23 22:49:26,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:49:26,287 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-23 22:49:26,287 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:49:26,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:49:26,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:49:26,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-23 22:49:26,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:49:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1109720930, now seen corresponding path program 1 times [2023-08-23 22:49:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:49:26,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466000752] [2023-08-23 22:49:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:49:26,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:49:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:49:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:49:26,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:49:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466000752] [2023-08-23 22:49:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466000752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:49:26,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:49:26,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:49:26,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653483056] [2023-08-23 22:49:26,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:49:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:49:26,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:49:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:49:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:49:26,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 230 [2023-08-23 22:49:26,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 22:49:26,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:49:26,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 230 [2023-08-23 22:49:26,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:50:29,134 INFO L124 PetriNetUnfolderBase]: 782236/974548 cut-off events. [2023-08-23 22:50:29,135 INFO L125 PetriNetUnfolderBase]: For 209942/209942 co-relation queries the response was YES. [2023-08-23 22:50:31,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993817 conditions, 974548 events. 782236/974548 cut-off events. For 209942/209942 co-relation queries the response was YES. Maximal size of possible extension queue 26380. Compared 6508489 event pairs, 242001 based on Foata normal form. 0/955476 useless extension candidates. Maximal degree in co-relation 1993803. Up to 661916 conditions per place. [2023-08-23 22:50:35,321 INFO L140 encePairwiseOnDemand]: 209/230 looper letters, 59 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2023-08-23 22:50:35,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 392 flow [2023-08-23 22:50:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:50:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:50:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-23 22:50:35,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753623188405797 [2023-08-23 22:50:35,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-23 22:50:35,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-23 22:50:35,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:35,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-23 22:50:35,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:50:35,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 22:50:35,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 22:50:35,325 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 170 flow. Second operand 3 states and 328 transitions. [2023-08-23 22:50:35,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 392 flow [2023-08-23 22:50:35,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 359 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-23 22:50:35,442 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 225 flow [2023-08-23 22:50:35,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-08-23 22:50:35,442 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-08-23 22:50:35,442 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 225 flow [2023-08-23 22:50:35,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 22:50:35,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:35,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:50:35,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-23 22:50:35,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-23 22:50:35,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1389580260, now seen corresponding path program 1 times [2023-08-23 22:50:35,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:35,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776822092] [2023-08-23 22:50:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:35,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:35,485 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 22:50:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:35,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776822092] [2023-08-23 22:50:35,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776822092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:50:35,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:50:35,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:50:35,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172618782] [2023-08-23 22:50:35,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:50:35,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:50:35,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:50:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:50:35,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 230 [2023-08-23 22:50:35,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 22:50:35,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:35,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 230 [2023-08-23 22:50:35,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:50:35,966 INFO L124 PetriNetUnfolderBase]: 1961/5599 cut-off events. [2023-08-23 22:50:35,966 INFO L125 PetriNetUnfolderBase]: For 1222/1222 co-relation queries the response was YES. [2023-08-23 22:50:35,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11227 conditions, 5599 events. 1961/5599 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 49588 event pairs, 251 based on Foata normal form. 4093/9648 useless extension candidates. Maximal degree in co-relation 11210. Up to 2143 conditions per place. [2023-08-23 22:50:35,982 INFO L140 encePairwiseOnDemand]: 218/230 looper letters, 17 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2023-08-23 22:50:35,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 290 flow [2023-08-23 22:50:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:50:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:50:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-23 22:50:35,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115942028985507 [2023-08-23 22:50:35,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-23 22:50:35,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-23 22:50:35,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:35,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-23 22:50:35,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 22:50:35,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 22:50:35,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 22:50:35,987 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 225 flow. Second operand 3 states and 353 transitions. [2023-08-23 22:50:35,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 290 flow [2023-08-23 22:50:35,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 266 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-23 22:50:35,992 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 195 flow [2023-08-23 22:50:35,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-23 22:50:35,993 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2023-08-23 22:50:35,993 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 195 flow [2023-08-23 22:50:35,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 22:50:35,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:35,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:50:35,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-23 22:50:35,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-23 22:50:35,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:35,994 INFO L85 PathProgramCache]: Analyzing trace with hash 887309776, now seen corresponding path program 1 times [2023-08-23 22:50:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:35,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273799471] [2023-08-23 22:50:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:35,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:36,050 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 22:50:36,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:36,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273799471] [2023-08-23 22:50:36,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273799471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:50:36,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:50:36,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:50:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107457934] [2023-08-23 22:50:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:50:36,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:50:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:50:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:50:36,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 230 [2023-08-23 22:50:36,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 0 states have call successors, (0), 0 states 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 22:50:36,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:36,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 230 [2023-08-23 22:50:36,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:50:36,790 INFO L124 PetriNetUnfolderBase]: 5523/10804 cut-off events. [2023-08-23 22:50:36,791 INFO L125 PetriNetUnfolderBase]: For 3443/3443 co-relation queries the response was YES. [2023-08-23 22:50:36,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29448 conditions, 10804 events. 5523/10804 cut-off events. For 3443/3443 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 93938 event pairs, 167 based on Foata normal form. 0/10686 useless extension candidates. Maximal degree in co-relation 29432. Up to 8400 conditions per place. [2023-08-23 22:50:36,843 INFO L140 encePairwiseOnDemand]: 213/230 looper letters, 100 selfloop transitions, 26 changer transitions 0/135 dead transitions. [2023-08-23 22:50:36,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 135 transitions, 755 flow [2023-08-23 22:50:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:50:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:50:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 559 transitions. [2023-08-23 22:50:36,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40507246376811595 [2023-08-23 22:50:36,846 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 559 transitions. [2023-08-23 22:50:36,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 559 transitions. [2023-08-23 22:50:36,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:36,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 559 transitions. [2023-08-23 22:50:36,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.16666666666667) internal successors, (559), 6 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 22:50:36,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 22:50:36,848 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 22:50:36,849 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 195 flow. Second operand 6 states and 559 transitions. [2023-08-23 22:50:36,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 135 transitions, 755 flow [2023-08-23 22:50:36,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 135 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 22:50:36,856 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 392 flow [2023-08-23 22:50:36,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2023-08-23 22:50:36,857 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-23 22:50:36,857 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 392 flow [2023-08-23 22:50:36,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 0 states have call successors, (0), 0 states 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 22:50:36,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:36,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:50:36,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-23 22:50:36,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-23 22:50:36,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash 914423267, now seen corresponding path program 2 times [2023-08-23 22:50:36,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:36,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532649859] [2023-08-23 22:50:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:36,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:50:36,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:36,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532649859] [2023-08-23 22:50:36,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532649859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:50:36,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823000235] [2023-08-23 22:50:36,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:50:36,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:50:36,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:50:36,967 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 22:50:36,968 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 22:50:37,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:50:37,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:50:37,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-23 22:50:37,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:50:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:50:37,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:50:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:50:37,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823000235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:50:37,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:50:37,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-23 22:50:37,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167357980] [2023-08-23 22:50:37,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:50:37,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-23 22:50:37,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:37,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-23 22:50:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-23 22:50:37,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 230 [2023-08-23 22:50:37,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 392 flow. Second operand has 20 states, 20 states have (on average 75.85) internal successors, (1517), 20 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 22:50:37,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:37,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 230 [2023-08-23 22:50:37,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:50:38,990 INFO L124 PetriNetUnfolderBase]: 8073/15566 cut-off events. [2023-08-23 22:50:38,990 INFO L125 PetriNetUnfolderBase]: For 7197/7197 co-relation queries the response was YES. [2023-08-23 22:50:39,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43392 conditions, 15566 events. 8073/15566 cut-off events. For 7197/7197 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 144723 event pairs, 89 based on Foata normal form. 70/15632 useless extension candidates. Maximal degree in co-relation 43371. Up to 8670 conditions per place. [2023-08-23 22:50:39,078 INFO L140 encePairwiseOnDemand]: 208/230 looper letters, 134 selfloop transitions, 56 changer transitions 0/199 dead transitions. [2023-08-23 22:50:39,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 199 transitions, 1285 flow [2023-08-23 22:50:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-23 22:50:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-23 22:50:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 976 transitions. [2023-08-23 22:50:39,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3857707509881423 [2023-08-23 22:50:39,082 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 976 transitions. [2023-08-23 22:50:39,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 976 transitions. [2023-08-23 22:50:39,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:50:39,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 976 transitions. [2023-08-23 22:50:39,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.72727272727273) internal successors, (976), 11 states have internal predecessors, (976), 0 states have call successors, (0), 0 states 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 22:50:39,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states 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 22:50:39,088 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states 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 22:50:39,088 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 392 flow. Second operand 11 states and 976 transitions. [2023-08-23 22:50:39,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 199 transitions, 1285 flow [2023-08-23 22:50:39,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 199 transitions, 1285 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:50:39,109 INFO L231 Difference]: Finished difference. Result has 85 places, 113 transitions, 742 flow [2023-08-23 22:50:39,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=742, PETRI_PLACES=85, PETRI_TRANSITIONS=113} [2023-08-23 22:50:39,109 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-08-23 22:50:39,109 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 113 transitions, 742 flow [2023-08-23 22:50:39,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 75.85) internal successors, (1517), 20 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 22:50:39,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:39,110 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:50:39,114 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 22:50:39,310 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,SelfDestructingSolverStorable17 [2023-08-23 22:50:39,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-23 22:50:39,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1785057498, now seen corresponding path program 1 times [2023-08-23 22:50:39,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:39,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583960562] [2023-08-23 22:50:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:39,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:50:39,330 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:50:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:50:39,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:50:39,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:50:39,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-23 22:50:39,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-08-23 22:50:39,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-08-23 22:50:39,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-08-23 22:50:39,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-08-23 22:50:39,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-08-23 22:50:39,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-08-23 22:50:39,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-08-23 22:50:39,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-23 22:50:39,346 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-23 22:50:39,347 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:50:39,347 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-23 22:50:39,381 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:50:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 196 transitions, 512 flow [2023-08-23 22:50:39,397 INFO L124 PetriNetUnfolderBase]: 22/195 cut-off events. [2023-08-23 22:50:39,397 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-23 22:50:39,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 195 events. 22/195 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 384 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 230. Up to 14 conditions per place. [2023-08-23 22:50:39,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 196 transitions, 512 flow [2023-08-23 22:50:39,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 125 transitions, 313 flow [2023-08-23 22:50:39,399 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:50:39,400 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 125 transitions, 313 flow [2023-08-23 22:50:39,400 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 125 transitions, 313 flow [2023-08-23 22:50:39,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 125 transitions, 313 flow [2023-08-23 22:50:39,412 INFO L124 PetriNetUnfolderBase]: 22/195 cut-off events. [2023-08-23 22:50:39,412 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-23 22:50:39,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 195 events. 22/195 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 383 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 209. Up to 14 conditions per place. [2023-08-23 22:50:39,526 INFO L119 LiptonReduction]: Number of co-enabled transitions 8970 [2023-08-23 22:50:40,685 INFO L134 LiptonReduction]: Checked pairs total: 31391 [2023-08-23 22:50:40,685 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-23 22:50:40,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:50:40,687 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;@d772f08, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:50:40,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-23 22:50:40,688 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:50:40,688 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-23 22:50:40,688 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:50:40,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:50:40,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-23 22:50:40,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-23 22:50:40,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:50:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1385291915, now seen corresponding path program 1 times [2023-08-23 22:50:40,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:50:40,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258266242] [2023-08-23 22:50:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:50:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:50:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:50:40,722 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 22:50:40,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:50:40,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258266242] [2023-08-23 22:50:40,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258266242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:50:40,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:50:40,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 22:50:40,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614453630] [2023-08-23 22:50:40,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:50:40,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:50:40,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:50:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:50:40,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:50:40,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 262 [2023-08-23 22:50:40,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 22:50:40,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:50:40,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 262 [2023-08-23 22:50:40,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand