/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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 21:01:44,983 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 21:01:45,067 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 [2023-08-26 21:01:45,071 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 21:01:45,072 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 21:01:45,102 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 21:01:45,103 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 21:01:45,104 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 21:01:45,104 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 21:01:45,108 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 21:01:45,108 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 21:01:45,108 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 21:01:45,109 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 21:01:45,110 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 21:01:45,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 21:01:45,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 21:01:45,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 21:01:45,111 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 21:01:45,111 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 21:01:45,111 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 21:01:45,111 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 21:01:45,112 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 21:01:45,112 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 21:01:45,112 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 21:01:45,113 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 21:01:45,113 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 21:01:45,113 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 21:01:45,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 21:01:45,114 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 21:01:45,114 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 21:01:45,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 21:01:45,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 21:01:45,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 21:01:45,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 21:01:45,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 21:01:45,116 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 21:01:45,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 21:01:45,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 21:01:45,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 21:01:45,460 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 21:01:45,461 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 21:01:45,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-26 21:01:46,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 21:01:46,994 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 21:01:46,995 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-26 21:01:47,015 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e9afa828/243a0b44b3d44fc491c9d3886eecbe4d/FLAGf60e9decf [2023-08-26 21:01:47,030 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e9afa828/243a0b44b3d44fc491c9d3886eecbe4d [2023-08-26 21:01:47,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 21:01:47,036 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 21:01:47,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 21:01:47,038 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 21:01:47,041 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 21:01:47,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191e2446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47, skipping insertion in model container [2023-08-26 21:01:47,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,094 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 21:01:47,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 21:01:47,425 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 21:01:47,458 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-26 21:01:47,460 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-26 21:01:47,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 21:01:47,514 INFO L206 MainTranslator]: Completed translation [2023-08-26 21:01:47,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47 WrapperNode [2023-08-26 21:01:47,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 21:01:47,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 21:01:47,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 21:01:47,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 21:01:47,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,574 INFO L138 Inliner]: procedures = 170, calls = 19, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 86 [2023-08-26 21:01:47,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 21:01:47,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 21:01:47,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 21:01:47,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 21:01:47,583 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,585 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,585 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,589 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,593 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,594 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 21:01:47,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 21:01:47,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 21:01:47,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 21:01:47,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (1/1) ... [2023-08-26 21:01:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 21:01:47,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 21:01:47,629 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) [2023-08-26 21:01:47,635 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 [2023-08-26 21:01:47,659 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-26 21:01:47,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-26 21:01:47,659 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 21:01:47,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 21:01:47,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 21:01:47,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 21:01:47,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 21:01:47,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 21:01:47,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 21:01:47,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 21:01:47,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 21:01:47,661 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 21:01:47,776 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 21:01:47,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 21:01:47,970 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 21:01:48,025 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 21:01:48,026 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 21:01:48,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:01:48 BoogieIcfgContainer [2023-08-26 21:01:48,028 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 21:01:48,030 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 21:01:48,030 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 21:01:48,033 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 21:01:48,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:01:47" (1/3) ... [2023-08-26 21:01:48,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574f8023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:01:48, skipping insertion in model container [2023-08-26 21:01:48,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:47" (2/3) ... [2023-08-26 21:01:48,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574f8023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:01:48, skipping insertion in model container [2023-08-26 21:01:48,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:01:48" (3/3) ... [2023-08-26 21:01:48,036 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-08-26 21:01:48,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 21:01:48,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-26 21:01:48,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 21:01:48,123 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:48,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 65 transitions, 140 flow [2023-08-26 21:01:48,210 INFO L124 PetriNetUnfolderBase]: 8/74 cut-off events. [2023-08-26 21:01:48,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:48,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 74 events. 8/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-26 21:01:48,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 65 transitions, 140 flow [2023-08-26 21:01:48,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 64 transitions, 136 flow [2023-08-26 21:01:48,227 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:48,238 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 64 transitions, 136 flow [2023-08-26 21:01:48,243 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 64 transitions, 136 flow [2023-08-26 21:01:48,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 64 transitions, 136 flow [2023-08-26 21:01:48,288 INFO L124 PetriNetUnfolderBase]: 8/74 cut-off events. [2023-08-26 21:01:48,288 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:48,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 74 events. 8/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-26 21:01:48,291 INFO L119 LiptonReduction]: Number of co-enabled transitions 1264 [2023-08-26 21:01:49,581 INFO L134 LiptonReduction]: Checked pairs total: 2186 [2023-08-26 21:01:49,582 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-26 21:01:49,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:49,604 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;@2d5c5d1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:49,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-26 21:01:49,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:49,611 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-26 21:01:49,611 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:49,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:49,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 21:01:49,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-26 21:01:49,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash 334357577, now seen corresponding path program 1 times [2023-08-26 21:01:49,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:49,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514580592] [2023-08-26 21:01:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:49,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:49,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:49,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514580592] [2023-08-26 21:01:49,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514580592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:49,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:49,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:01:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334068565] [2023-08-26 21:01:49,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:49,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:01:49,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:01:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:01:49,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 115 [2023-08-26 21:01:49,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:49,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:49,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 115 [2023-08-26 21:01:49,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:50,103 INFO L124 PetriNetUnfolderBase]: 213/358 cut-off events. [2023-08-26 21:01:50,104 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 21:01:50,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 358 events. 213/358 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1276 event pairs, 65 based on Foata normal form. 12/342 useless extension candidates. Maximal degree in co-relation 716. Up to 202 conditions per place. [2023-08-26 21:01:50,114 INFO L140 encePairwiseOnDemand]: 104/115 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-26 21:01:50,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 27 transitions, 110 flow [2023-08-26 21:01:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:01:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:01:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-08-26 21:01:50,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753623188405797 [2023-08-26 21:01:50,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-08-26 21:01:50,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-08-26 21:01:50,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:50,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-08-26 21:01:50,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:50,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:50,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:50,146 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 56 flow. Second operand 3 states and 164 transitions. [2023-08-26 21:01:50,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 27 transitions, 110 flow [2023-08-26 21:01:50,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 21:01:50,150 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 75 flow [2023-08-26 21:01:50,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-26 21:01:50,155 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-08-26 21:01:50,155 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 75 flow [2023-08-26 21:01:50,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:50,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:50,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-26 21:01:50,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 21:01:50,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-26 21:01:50,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2036216073, now seen corresponding path program 1 times [2023-08-26 21:01:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:50,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375057909] [2023-08-26 21:01:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:50,201 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:50,246 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:50,246 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:50,248 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-26 21:01:50,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2023-08-26 21:01:50,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-26 21:01:50,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2023-08-26 21:01:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 21:01:50,250 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:01:50,253 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:01:50,253 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 21:01:50,277 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:50,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 216 flow [2023-08-26 21:01:50,298 INFO L124 PetriNetUnfolderBase]: 11/99 cut-off events. [2023-08-26 21:01:50,298 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 21:01:50,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 99 events. 11/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2023-08-26 21:01:50,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 96 transitions, 216 flow [2023-08-26 21:01:50,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 77 transitions, 169 flow [2023-08-26 21:01:50,300 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:50,300 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 77 transitions, 169 flow [2023-08-26 21:01:50,301 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 77 transitions, 169 flow [2023-08-26 21:01:50,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 77 transitions, 169 flow [2023-08-26 21:01:50,317 INFO L124 PetriNetUnfolderBase]: 11/99 cut-off events. [2023-08-26 21:01:50,318 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 21:01:50,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 99 events. 11/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 87. Up to 6 conditions per place. [2023-08-26 21:01:50,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 2330 [2023-08-26 21:01:51,381 INFO L134 LiptonReduction]: Checked pairs total: 6118 [2023-08-26 21:01:51,381 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-26 21:01:51,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:51,384 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;@2d5c5d1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:51,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 21:01:51,405 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:51,405 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-26 21:01:51,405 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:51,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:51,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 21:01:51,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-26 21:01:51,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash 504144786, now seen corresponding path program 1 times [2023-08-26 21:01:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:51,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663643371] [2023-08-26 21:01:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:51,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:51,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:51,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663643371] [2023-08-26 21:01:51,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663643371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:51,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:51,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:01:51,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462529949] [2023-08-26 21:01:51,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:51,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:01:51,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:01:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:01:51,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 147 [2023-08-26 21:01:51,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:51,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 147 [2023-08-26 21:01:51,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:51,713 INFO L124 PetriNetUnfolderBase]: 1822/2739 cut-off events. [2023-08-26 21:01:51,713 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-08-26 21:01:51,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5511 conditions, 2739 events. 1822/2739 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14902 event pairs, 516 based on Foata normal form. 80/2653 useless extension candidates. Maximal degree in co-relation 5500. Up to 1738 conditions per place. [2023-08-26 21:01:51,734 INFO L140 encePairwiseOnDemand]: 133/147 looper letters, 30 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-08-26 21:01:51,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 180 flow [2023-08-26 21:01:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:01:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:01:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2023-08-26 21:01:51,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-08-26 21:01:51,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 217 transitions. [2023-08-26 21:01:51,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 217 transitions. [2023-08-26 21:01:51,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:51,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 217 transitions. [2023-08-26 21:01:51,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,740 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 87 flow. Second operand 3 states and 217 transitions. [2023-08-26 21:01:51,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 180 flow [2023-08-26 21:01:51,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 177 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 21:01:51,742 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 118 flow [2023-08-26 21:01:51,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-26 21:01:51,743 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-26 21:01:51,743 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 118 flow [2023-08-26 21:01:51,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:51,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:01:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 21:01:51,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-26 21:01:51,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash -959006429, now seen corresponding path program 1 times [2023-08-26 21:01:51,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:51,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263426972] [2023-08-26 21:01:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:51,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:51,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:51,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263426972] [2023-08-26 21:01:51,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263426972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:51,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:51,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 21:01:51,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444536909] [2023-08-26 21:01:51,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:51,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:01:51,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:51,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:01:51,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:01:51,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 147 [2023-08-26 21:01:51,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:51,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 147 [2023-08-26 21:01:51,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:51,856 INFO L124 PetriNetUnfolderBase]: 108/345 cut-off events. [2023-08-26 21:01:51,856 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-08-26 21:01:51,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 345 events. 108/345 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1722 event pairs, 15 based on Foata normal form. 113/447 useless extension candidates. Maximal degree in co-relation 693. Up to 132 conditions per place. [2023-08-26 21:01:51,859 INFO L140 encePairwiseOnDemand]: 141/147 looper letters, 12 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-08-26 21:01:51,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 158 flow [2023-08-26 21:01:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:01:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:01:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-26 21:01:51,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2023-08-26 21:01:51,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-26 21:01:51,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-26 21:01:51,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:51,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-26 21:01:51,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,864 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 118 flow. Second operand 3 states and 222 transitions. [2023-08-26 21:01:51,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 158 flow [2023-08-26 21:01:51,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 146 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 21:01:51,866 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 106 flow [2023-08-26 21:01:51,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-26 21:01:51,867 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-26 21:01:51,867 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 106 flow [2023-08-26 21:01:51,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:51,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:51,868 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 21:01:51,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 21:01:51,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-26 21:01:51,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 304944966, now seen corresponding path program 1 times [2023-08-26 21:01:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:51,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220510512] [2023-08-26 21:01:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:51,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:51,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:51,889 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:51,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-26 21:01:51,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2023-08-26 21:01:51,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-26 21:01:51,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2023-08-26 21:01:51,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2023-08-26 21:01:51,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 21:01:51,890 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 21:01:51,891 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:01:51,891 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 21:01:51,912 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:51,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 127 transitions, 296 flow [2023-08-26 21:01:51,927 INFO L124 PetriNetUnfolderBase]: 14/124 cut-off events. [2023-08-26 21:01:51,927 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 21:01:51,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 124 events. 14/124 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-26 21:01:51,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 127 transitions, 296 flow [2023-08-26 21:01:51,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 90 transitions, 204 flow [2023-08-26 21:01:51,929 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:51,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 90 transitions, 204 flow [2023-08-26 21:01:51,929 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 90 transitions, 204 flow [2023-08-26 21:01:51,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 90 transitions, 204 flow [2023-08-26 21:01:51,941 INFO L124 PetriNetUnfolderBase]: 14/124 cut-off events. [2023-08-26 21:01:51,941 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 21:01:51,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 124 events. 14/124 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 232 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 117. Up to 8 conditions per place. [2023-08-26 21:01:51,944 INFO L119 LiptonReduction]: Number of co-enabled transitions 3708 [2023-08-26 21:01:53,057 INFO L134 LiptonReduction]: Checked pairs total: 11037 [2023-08-26 21:01:53,057 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-26 21:01:53,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:53,060 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;@2d5c5d1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:53,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 21:01:53,062 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:53,062 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-26 21:01:53,062 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:53,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:53,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 21:01:53,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 21:01:53,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:53,063 INFO L85 PathProgramCache]: Analyzing trace with hash 709104154, now seen corresponding path program 1 times [2023-08-26 21:01:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:53,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271656740] [2023-08-26 21:01:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:53,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:53,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271656740] [2023-08-26 21:01:53,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271656740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:53,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:53,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:01:53,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760701326] [2023-08-26 21:01:53,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:53,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:01:53,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:53,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:01:53,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:01:53,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 184 [2023-08-26 21:01:53,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:53,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:53,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 184 [2023-08-26 21:01:53,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:54,574 INFO L124 PetriNetUnfolderBase]: 13843/19049 cut-off events. [2023-08-26 21:01:54,574 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2023-08-26 21:01:54,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38580 conditions, 19049 events. 13843/19049 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 114811 event pairs, 3810 based on Foata normal form. 0/18526 useless extension candidates. Maximal degree in co-relation 38568. Up to 12179 conditions per place. [2023-08-26 21:01:54,738 INFO L140 encePairwiseOnDemand]: 168/184 looper letters, 39 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2023-08-26 21:01:54,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 244 flow [2023-08-26 21:01:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:01:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:01:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-26 21:01:54,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48731884057971014 [2023-08-26 21:01:54,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-26 21:01:54,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-26 21:01:54,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:54,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-26 21:01:54,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,744 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 112 flow. Second operand 3 states and 269 transitions. [2023-08-26 21:01:54,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 244 flow [2023-08-26 21:01:54,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 235 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 21:01:54,751 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 151 flow [2023-08-26 21:01:54,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, 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=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-26 21:01:54,752 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 21:01:54,753 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 151 flow [2023-08-26 21:01:54,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:54,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:01:54,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 21:01:54,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 21:01:54,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:54,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1366379879, now seen corresponding path program 1 times [2023-08-26 21:01:54,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:54,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450658512] [2023-08-26 21:01:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:54,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450658512] [2023-08-26 21:01:54,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450658512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:54,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:54,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 21:01:54,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020138933] [2023-08-26 21:01:54,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:54,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:01:54,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:54,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:01:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:01:54,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 184 [2023-08-26 21:01:54,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:54,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 184 [2023-08-26 21:01:54,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:54,914 INFO L124 PetriNetUnfolderBase]: 303/927 cut-off events. [2023-08-26 21:01:54,915 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-26 21:01:54,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 927 events. 303/927 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5892 event pairs, 39 based on Foata normal form. 413/1331 useless extension candidates. Maximal degree in co-relation 1853. Up to 343 conditions per place. [2023-08-26 21:01:54,922 INFO L140 encePairwiseOnDemand]: 176/184 looper letters, 13 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2023-08-26 21:01:54,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 198 flow [2023-08-26 21:01:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:01:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:01:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-26 21:01:54,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2023-08-26 21:01:54,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-26 21:01:54,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-26 21:01:54,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:54,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-26 21:01:54,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,927 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 151 flow. Second operand 3 states and 280 transitions. [2023-08-26 21:01:54,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 198 flow [2023-08-26 21:01:54,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 182 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 21:01:54,932 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 133 flow [2023-08-26 21:01:54,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-08-26 21:01:54,934 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 21:01:54,934 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 133 flow [2023-08-26 21:01:54,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:54,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:54,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:01:54,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 21:01:54,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 21:01:54,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash -651025903, now seen corresponding path program 1 times [2023-08-26 21:01:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:54,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866753577] [2023-08-26 21:01:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:54,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:55,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866753577] [2023-08-26 21:01:55,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866753577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:55,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:55,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 21:01:55,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930203981] [2023-08-26 21:01:55,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:55,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 21:01:55,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 21:01:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 21:01:55,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 184 [2023-08-26 21:01:55,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 133 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) [2023-08-26 21:01:55,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:55,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 184 [2023-08-26 21:01:55,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:55,391 INFO L124 PetriNetUnfolderBase]: 935/1975 cut-off events. [2023-08-26 21:01:55,391 INFO L125 PetriNetUnfolderBase]: For 564/565 co-relation queries the response was YES. [2023-08-26 21:01:55,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5259 conditions, 1975 events. 935/1975 cut-off events. For 564/565 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14125 event pairs, 59 based on Foata normal form. 0/1951 useless extension candidates. Maximal degree in co-relation 5245. Up to 1184 conditions per place. [2023-08-26 21:01:55,403 INFO L140 encePairwiseOnDemand]: 173/184 looper letters, 66 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2023-08-26 21:01:55,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 89 transitions, 485 flow [2023-08-26 21:01:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 21:01:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 21:01:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 465 transitions. [2023-08-26 21:01:55,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421195652173913 [2023-08-26 21:01:55,405 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 465 transitions. [2023-08-26 21:01:55,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 465 transitions. [2023-08-26 21:01:55,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:55,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 465 transitions. [2023-08-26 21:01:55,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.5) internal successors, (465), 6 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:55,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:55,409 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:55,409 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 133 flow. Second operand 6 states and 465 transitions. [2023-08-26 21:01:55,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 89 transitions, 485 flow [2023-08-26 21:01:55,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 21:01:55,412 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 252 flow [2023-08-26 21:01:55,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-08-26 21:01:55,413 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-26 21:01:55,413 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 252 flow [2023-08-26 21:01:55,414 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) [2023-08-26 21:01:55,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:55,414 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:01:55,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 21:01:55,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-26 21:01:55,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:55,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1086992790, now seen corresponding path program 1 times [2023-08-26 21:01:55,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:55,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66602986] [2023-08-26 21:01:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:55,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:55,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:55,458 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:55,458 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:55,459 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-26 21:01:55,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2023-08-26 21:01:55,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-26 21:01:55,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 6 remaining) [2023-08-26 21:01:55,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-26 21:01:55,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-26 21:01:55,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 21:01:55,460 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-26 21:01:55,460 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:01:55,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 21:01:55,487 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:55,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 158 transitions, 380 flow [2023-08-26 21:01:55,504 INFO L124 PetriNetUnfolderBase]: 17/149 cut-off events. [2023-08-26 21:01:55,505 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 21:01:55,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 149 events. 17/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 287 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 169. Up to 10 conditions per place. [2023-08-26 21:01:55,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 158 transitions, 380 flow [2023-08-26 21:01:55,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 103 transitions, 241 flow [2023-08-26 21:01:55,507 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:55,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 103 transitions, 241 flow [2023-08-26 21:01:55,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 103 transitions, 241 flow [2023-08-26 21:01:55,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 103 transitions, 241 flow [2023-08-26 21:01:55,516 INFO L124 PetriNetUnfolderBase]: 17/149 cut-off events. [2023-08-26 21:01:55,517 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 21:01:55,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 149 events. 17/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 289 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 148. Up to 10 conditions per place. [2023-08-26 21:01:55,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 5398 [2023-08-26 21:01:56,559 INFO L134 LiptonReduction]: Checked pairs total: 17593 [2023-08-26 21:01:56,560 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-26 21:01:56,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:56,561 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;@2d5c5d1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:56,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 21:01:56,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:56,563 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-26 21:01:56,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:56,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:56,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 21:01:56,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 21:01:56,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash 948465508, now seen corresponding path program 1 times [2023-08-26 21:01:56,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:56,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931760677] [2023-08-26 21:01:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:56,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:01:56,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931760677] [2023-08-26 21:01:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931760677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:56,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:56,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:01:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119613338] [2023-08-26 21:01:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:01:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:01:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:01:56,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 220 [2023-08-26 21:01:56,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:01:56,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:56,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 220 [2023-08-26 21:01:56,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:02,070 INFO L124 PetriNetUnfolderBase]: 72081/93839 cut-off events. [2023-08-26 21:02:02,070 INFO L125 PetriNetUnfolderBase]: For 13671/13671 co-relation queries the response was YES. [2023-08-26 21:02:02,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189711 conditions, 93839 events. 72081/93839 cut-off events. For 13671/13671 co-relation queries the response was YES. Maximal size of possible extension queue 3218. Compared 583137 event pairs, 17343 based on Foata normal form. 0/90665 useless extension candidates. Maximal degree in co-relation 189698. Up to 84662 conditions per place. [2023-08-26 21:02:02,876 INFO L140 encePairwiseOnDemand]: 206/220 looper letters, 46 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2023-08-26 21:02:02,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 284 flow [2023-08-26 21:02:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:02:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:02:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-26 21:02:02,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47575757575757577 [2023-08-26 21:02:02,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-26 21:02:02,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-26 21:02:02,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:02,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-26 21:02:02,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:02,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:02,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:02,885 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 143 flow. Second operand 3 states and 314 transitions. [2023-08-26 21:02:02,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 284 flow [2023-08-26 21:02:02,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 265 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-26 21:02:02,895 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 143 flow [2023-08-26 21:02:02,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, 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=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-08-26 21:02:02,897 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -6 predicate places. [2023-08-26 21:02:02,897 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 143 flow [2023-08-26 21:02:02,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:02,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:02,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:02,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 21:02:02,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 21:02:02,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1559512992, now seen corresponding path program 1 times [2023-08-26 21:02:02,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:02,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302023839] [2023-08-26 21:02:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:02,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:02,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:02,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302023839] [2023-08-26 21:02:02,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302023839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:02,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:02,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 21:02:02,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635237598] [2023-08-26 21:02:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:02,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:02:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:02,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:02:02,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:02:02,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 220 [2023-08-26 21:02:02,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:02,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:02,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 220 [2023-08-26 21:02:02,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:03,109 INFO L124 PetriNetUnfolderBase]: 590/1896 cut-off events. [2023-08-26 21:02:03,109 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-08-26 21:02:03,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 1896 events. 590/1896 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14162 event pairs, 118 based on Foata normal form. 1022/2912 useless extension candidates. Maximal degree in co-relation 3467. Up to 662 conditions per place. [2023-08-26 21:02:03,119 INFO L140 encePairwiseOnDemand]: 210/220 looper letters, 15 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2023-08-26 21:02:03,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 223 flow [2023-08-26 21:02:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:02:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:02:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-26 21:02:03,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2023-08-26 21:02:03,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-26 21:02:03,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-26 21:02:03,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:03,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-26 21:02:03,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,125 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 143 flow. Second operand 3 states and 339 transitions. [2023-08-26 21:02:03,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 223 flow [2023-08-26 21:02:03,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 21:02:03,127 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 158 flow [2023-08-26 21:02:03,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-26 21:02:03,128 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-08-26 21:02:03,128 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 158 flow [2023-08-26 21:02:03,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:03,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:03,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 21:02:03,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 21:02:03,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash 346488237, now seen corresponding path program 1 times [2023-08-26 21:02:03,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:03,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181500984] [2023-08-26 21:02:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:03,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:03,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181500984] [2023-08-26 21:02:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181500984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:03,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:03,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 21:02:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397930315] [2023-08-26 21:02:03,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 21:02:03,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 21:02:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 21:02:03,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 220 [2023-08-26 21:02:03,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:03,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 220 [2023-08-26 21:02:03,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:03,607 INFO L124 PetriNetUnfolderBase]: 1797/3735 cut-off events. [2023-08-26 21:02:03,607 INFO L125 PetriNetUnfolderBase]: For 1175/1176 co-relation queries the response was YES. [2023-08-26 21:02:03,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9906 conditions, 3735 events. 1797/3735 cut-off events. For 1175/1176 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 28943 event pairs, 97 based on Foata normal form. 20/3754 useless extension candidates. Maximal degree in co-relation 9891. Up to 2558 conditions per place. [2023-08-26 21:02:03,626 INFO L140 encePairwiseOnDemand]: 206/220 looper letters, 77 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2023-08-26 21:02:03,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 102 transitions, 554 flow [2023-08-26 21:02:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 21:02:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 21:02:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 557 transitions. [2023-08-26 21:02:03,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421969696969697 [2023-08-26 21:02:03,629 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 557 transitions. [2023-08-26 21:02:03,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 557 transitions. [2023-08-26 21:02:03,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:03,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 557 transitions. [2023-08-26 21:02:03,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.83333333333333) internal successors, (557), 6 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,634 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 220.0) internal successors, (1540), 7 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,634 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 158 flow. Second operand 6 states and 557 transitions. [2023-08-26 21:02:03,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 102 transitions, 554 flow [2023-08-26 21:02:03,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 102 transitions, 528 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 21:02:03,639 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 264 flow [2023-08-26 21:02:03,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-08-26 21:02:03,640 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-26 21:02:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 264 flow [2023-08-26 21:02:03,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:03,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:03,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:03,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 21:02:03,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 21:02:03,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1069894984, now seen corresponding path program 2 times [2023-08-26 21:02:03,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:03,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099420792] [2023-08-26 21:02:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:03,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099420792] [2023-08-26 21:02:03,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099420792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 21:02:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893938052] [2023-08-26 21:02:03,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 21:02:03,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 21:02:03,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 21:02:03,769 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) [2023-08-26 21:02:03,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 21:02:03,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 21:02:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 21:02:03,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 21:02:03,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 21:02:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:04,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 21:02:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:04,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893938052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 21:02:04,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 21:02:04,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-26 21:02:04,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690481143] [2023-08-26 21:02:04,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 21:02:04,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 21:02:04,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 21:02:04,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-26 21:02:04,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 220 [2023-08-26 21:02:04,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 264 flow. Second operand has 20 states, 20 states have (on average 78.85) internal successors, (1577), 20 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:04,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:04,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 220 [2023-08-26 21:02:04,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:05,188 INFO L124 PetriNetUnfolderBase]: 2689/5465 cut-off events. [2023-08-26 21:02:05,188 INFO L125 PetriNetUnfolderBase]: For 2439/2440 co-relation queries the response was YES. [2023-08-26 21:02:05,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15146 conditions, 5465 events. 2689/5465 cut-off events. For 2439/2440 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 45443 event pairs, 61 based on Foata normal form. 40/5504 useless extension candidates. Maximal degree in co-relation 15126. Up to 2618 conditions per place. [2023-08-26 21:02:05,221 INFO L140 encePairwiseOnDemand]: 202/220 looper letters, 104 selfloop transitions, 37 changer transitions 0/149 dead transitions. [2023-08-26 21:02:05,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 149 transitions, 917 flow [2023-08-26 21:02:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 21:02:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 21:02:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 978 transitions. [2023-08-26 21:02:05,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041322314049587 [2023-08-26 21:02:05,225 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 978 transitions. [2023-08-26 21:02:05,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 978 transitions. [2023-08-26 21:02:05,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:05,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 978 transitions. [2023-08-26 21:02:05,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 88.9090909090909) internal successors, (978), 11 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:05,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:05,233 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 220.0) internal successors, (2640), 12 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:05,233 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 264 flow. Second operand 11 states and 978 transitions. [2023-08-26 21:02:05,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 149 transitions, 917 flow [2023-08-26 21:02:05,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 149 transitions, 899 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 21:02:05,246 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 471 flow [2023-08-26 21:02:05,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=471, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2023-08-26 21:02:05,246 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 15 predicate places. [2023-08-26 21:02:05,246 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 471 flow [2023-08-26 21:02:05,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 78.85) internal successors, (1577), 20 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:05,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:05,247 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:05,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 21:02:05,453 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 [2023-08-26 21:02:05,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-26 21:02:05,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:05,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1030955534, now seen corresponding path program 1 times [2023-08-26 21:02:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:05,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862597238] [2023-08-26 21:02:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:05,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:05,466 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:02:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:05,477 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:02:05,477 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:02:05,477 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-26 21:02:05,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2023-08-26 21:02:05,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-26 21:02:05,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 7 remaining) [2023-08-26 21:02:05,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 21:02:05,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 21:02:05,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 21:02:05,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 21:02:05,479 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-26 21:02:05,479 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:02:05,480 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 21:02:05,515 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:02:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 189 transitions, 468 flow [2023-08-26 21:02:05,532 INFO L124 PetriNetUnfolderBase]: 20/174 cut-off events. [2023-08-26 21:02:05,533 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 21:02:05,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 174 events. 20/174 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 341 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 201. Up to 12 conditions per place. [2023-08-26 21:02:05,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 189 transitions, 468 flow [2023-08-26 21:02:05,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 116 transitions, 280 flow [2023-08-26 21:02:05,535 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:02:05,535 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 116 transitions, 280 flow [2023-08-26 21:02:05,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 116 transitions, 280 flow [2023-08-26 21:02:05,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 116 transitions, 280 flow [2023-08-26 21:02:05,549 INFO L124 PetriNetUnfolderBase]: 20/174 cut-off events. [2023-08-26 21:02:05,550 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 21:02:05,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 174 events. 20/174 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 341 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 180. Up to 12 conditions per place. [2023-08-26 21:02:05,556 INFO L119 LiptonReduction]: Number of co-enabled transitions 7400 [2023-08-26 21:02:06,779 INFO L134 LiptonReduction]: Checked pairs total: 24665 [2023-08-26 21:02:06,779 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-26 21:02:06,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:02:06,781 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;@2d5c5d1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:02:06,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-26 21:02:06,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:02:06,782 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-26 21:02:06,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:02:06,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:06,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 21:02:06,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-26 21:02:06,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1223979858, now seen corresponding path program 1 times [2023-08-26 21:02:06,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:06,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675979866] [2023-08-26 21:02:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:06,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:06,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675979866] [2023-08-26 21:02:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675979866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:06,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:06,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:02:06,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894024068] [2023-08-26 21:02:06,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:06,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:02:06,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:06,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:02:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:02:06,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 258 [2023-08-26 21:02:06,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:06,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:06,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 258 [2023-08-26 21:02:06,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:48,233 INFO L124 PetriNetUnfolderBase]: 517197/644782 cut-off events. [2023-08-26 21:02:48,233 INFO L125 PetriNetUnfolderBase]: For 117710/117710 co-relation queries the response was YES. [2023-08-26 21:02:50,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307447 conditions, 644782 events. 517197/644782 cut-off events. For 117710/117710 co-relation queries the response was YES. Maximal size of possible extension queue 17368. Compared 4164204 event pairs, 137383 based on Foata normal form. 0/625710 useless extension candidates. Maximal degree in co-relation 1307433. Up to 599752 conditions per place. [2023-08-26 21:02:53,091 INFO L140 encePairwiseOnDemand]: 242/258 looper letters, 55 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2023-08-26 21:02:53,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 352 flow [2023-08-26 21:02:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:02:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:02:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-26 21:02:53,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715762273901809 [2023-08-26 21:02:53,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-26 21:02:53,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-26 21:02:53,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:53,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-26 21:02:53,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,097 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 174 flow. Second operand 3 states and 365 transitions. [2023-08-26 21:02:53,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 352 flow [2023-08-26 21:02:53,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 319 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-26 21:02:53,127 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 171 flow [2023-08-26 21:02:53,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, 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=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-26 21:02:53,128 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -7 predicate places. [2023-08-26 21:02:53,128 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 171 flow [2023-08-26 21:02:53,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:53,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:53,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 21:02:53,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-26 21:02:53,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash 185211256, now seen corresponding path program 1 times [2023-08-26 21:02:53,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493688073] [2023-08-26 21:02:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:53,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:53,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:53,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493688073] [2023-08-26 21:02:53,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493688073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:53,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:53,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 21:02:53,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577729852] [2023-08-26 21:02:53,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:02:53,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:02:53,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:02:53,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 258 [2023-08-26 21:02:53,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:53,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 258 [2023-08-26 21:02:53,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:53,399 INFO L124 PetriNetUnfolderBase]: 1396/4417 cut-off events. [2023-08-26 21:02:53,399 INFO L125 PetriNetUnfolderBase]: For 644/644 co-relation queries the response was YES. [2023-08-26 21:02:53,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8040 conditions, 4417 events. 1396/4417 cut-off events. For 644/644 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 38671 event pairs, 287 based on Foata normal form. 2922/7306 useless extension candidates. Maximal degree in co-relation 8024. Up to 1547 conditions per place. [2023-08-26 21:02:53,418 INFO L140 encePairwiseOnDemand]: 246/258 looper letters, 17 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-08-26 21:02:53,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 266 flow [2023-08-26 21:02:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 21:02:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 21:02:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-26 21:02:53,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142118863049095 [2023-08-26 21:02:53,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-26 21:02:53,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-26 21:02:53,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:53,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-26 21:02:53,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,423 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,423 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 171 flow. Second operand 3 states and 398 transitions. [2023-08-26 21:02:53,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 266 flow [2023-08-26 21:02:53,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 21:02:53,425 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 189 flow [2023-08-26 21:02:53,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-08-26 21:02:53,426 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2023-08-26 21:02:53,426 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 189 flow [2023-08-26 21:02:53,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:53,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:53,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 21:02:53,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-26 21:02:53,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash 792867134, now seen corresponding path program 1 times [2023-08-26 21:02:53,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:53,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274647554] [2023-08-26 21:02:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:53,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274647554] [2023-08-26 21:02:53,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274647554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:53,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:53,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 21:02:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201683820] [2023-08-26 21:02:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 21:02:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 21:02:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 21:02:53,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 258 [2023-08-26 21:02:53,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:53,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:53,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 258 [2023-08-26 21:02:53,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:54,143 INFO L124 PetriNetUnfolderBase]: 4185/8442 cut-off events. [2023-08-26 21:02:54,143 INFO L125 PetriNetUnfolderBase]: For 2741/2741 co-relation queries the response was YES. [2023-08-26 21:02:54,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22625 conditions, 8442 events. 4185/8442 cut-off events. For 2741/2741 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 72124 event pairs, 167 based on Foata normal form. 30/8468 useless extension candidates. Maximal degree in co-relation 22609. Up to 6538 conditions per place. [2023-08-26 21:02:54,183 INFO L140 encePairwiseOnDemand]: 241/258 looper letters, 93 selfloop transitions, 21 changer transitions 0/123 dead transitions. [2023-08-26 21:02:54,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 123 transitions, 677 flow [2023-08-26 21:02:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 21:02:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 21:02:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 649 transitions. [2023-08-26 21:02:54,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419250645994832 [2023-08-26 21:02:54,185 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 649 transitions. [2023-08-26 21:02:54,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 649 transitions. [2023-08-26 21:02:54,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:54,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 649 transitions. [2023-08-26 21:02:54,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 108.16666666666667) internal successors, (649), 6 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:54,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:54,190 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:54,190 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 189 flow. Second operand 6 states and 649 transitions. [2023-08-26 21:02:54,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 123 transitions, 677 flow [2023-08-26 21:02:54,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 123 transitions, 646 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 21:02:54,202 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 321 flow [2023-08-26 21:02:54,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2023-08-26 21:02:54,203 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2023-08-26 21:02:54,203 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 321 flow [2023-08-26 21:02:54,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:54,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:54,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:54,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 21:02:54,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-26 21:02:54,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1509220408, now seen corresponding path program 2 times [2023-08-26 21:02:54,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:54,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339781398] [2023-08-26 21:02:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:54,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:54,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339781398] [2023-08-26 21:02:54,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339781398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 21:02:54,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891349672] [2023-08-26 21:02:54,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 21:02:54,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 21:02:54,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 21:02:54,308 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) [2023-08-26 21:02:54,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 21:02:54,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 21:02:54,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 21:02:54,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 21:02:54,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 21:02:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:54,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 21:02:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:54,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891349672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 21:02:54,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 21:02:54,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-26 21:02:54,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206871353] [2023-08-26 21:02:54,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 21:02:54,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 21:02:54,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 21:02:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-08-26 21:02:54,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 258 [2023-08-26 21:02:54,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 321 flow. Second operand has 20 states, 20 states have (on average 90.85) internal successors, (1817), 20 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:54,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:54,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 258 [2023-08-26 21:02:54,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:56,033 INFO L124 PetriNetUnfolderBase]: 6055/11984 cut-off events. [2023-08-26 21:02:56,033 INFO L125 PetriNetUnfolderBase]: For 5537/5537 co-relation queries the response was YES. [2023-08-26 21:02:56,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33461 conditions, 11984 events. 6055/11984 cut-off events. For 5537/5537 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 108750 event pairs, 89 based on Foata normal form. 70/12050 useless extension candidates. Maximal degree in co-relation 33440. Up to 6718 conditions per place. [2023-08-26 21:02:56,097 INFO L140 encePairwiseOnDemand]: 236/258 looper letters, 126 selfloop transitions, 46 changer transitions 0/181 dead transitions. [2023-08-26 21:02:56,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 181 transitions, 1134 flow [2023-08-26 21:02:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 21:02:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 21:02:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1141 transitions. [2023-08-26 21:02:56,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40204369274136714 [2023-08-26 21:02:56,100 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1141 transitions. [2023-08-26 21:02:56,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1141 transitions. [2023-08-26 21:02:56,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:56,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1141 transitions. [2023-08-26 21:02:56,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 103.72727272727273) internal successors, (1141), 11 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:56,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:56,108 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:56,108 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 321 flow. Second operand 11 states and 1141 transitions. [2023-08-26 21:02:56,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 181 transitions, 1134 flow [2023-08-26 21:02:56,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 181 transitions, 1112 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-26 21:02:56,125 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 579 flow [2023-08-26 21:02:56,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=579, PETRI_PLACES=83, PETRI_TRANSITIONS=97} [2023-08-26 21:02:56,125 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2023-08-26 21:02:56,126 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 579 flow [2023-08-26 21:02:56,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.85) internal successors, (1817), 20 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:56,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:56,127 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:56,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 21:02:56,331 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 [2023-08-26 21:02:56,332 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-26 21:02:56,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:56,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1644787737, now seen corresponding path program 1 times [2023-08-26 21:02:56,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:56,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329776887] [2023-08-26 21:02:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:56,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:56,346 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:02:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:56,357 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:02:56,357 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:02:56,357 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-26 21:02:56,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (6 of 8 remaining) [2023-08-26 21:02:56,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-08-26 21:02:56,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 8 remaining) [2023-08-26 21:02:56,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 8 remaining) [2023-08-26 21:02:56,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 8 remaining) [2023-08-26 21:02:56,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 8 remaining) [2023-08-26 21:02:56,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 8 remaining) [2023-08-26 21:02:56,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 21:02:56,358 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-26 21:02:56,359 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:02:56,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 21:02:56,397 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:02:56,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 220 transitions, 560 flow [2023-08-26 21:02:56,415 INFO L124 PetriNetUnfolderBase]: 23/199 cut-off events. [2023-08-26 21:02:56,416 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 21:02:56,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 199 events. 23/199 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 398 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 234. Up to 14 conditions per place. [2023-08-26 21:02:56,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 220 transitions, 560 flow [2023-08-26 21:02:56,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 129 transitions, 321 flow [2023-08-26 21:02:56,419 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:02:56,419 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 129 transitions, 321 flow [2023-08-26 21:02:56,419 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 129 transitions, 321 flow [2023-08-26 21:02:56,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 129 transitions, 321 flow [2023-08-26 21:02:56,433 INFO L124 PetriNetUnfolderBase]: 23/199 cut-off events. [2023-08-26 21:02:56,433 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 21:02:56,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 199 events. 23/199 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 397 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 213. Up to 14 conditions per place. [2023-08-26 21:02:56,441 INFO L119 LiptonReduction]: Number of co-enabled transitions 9714 [2023-08-26 21:02:57,601 INFO L134 LiptonReduction]: Checked pairs total: 34127 [2023-08-26 21:02:57,601 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-26 21:02:57,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:02:57,603 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;@2d5c5d1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:02:57,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 21:02:57,604 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:02:57,604 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-26 21:02:57,604 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:02:57,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:57,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 21:02:57,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-26 21:02:57,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:57,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1531123708, now seen corresponding path program 1 times [2023-08-26 21:02:57,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:57,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973003545] [2023-08-26 21:02:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:57,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 21:02:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973003545] [2023-08-26 21:02:57,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973003545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:57,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:57,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:02:57,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800528711] [2023-08-26 21:02:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:57,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 21:02:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 21:02:57,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 21:02:57,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2023-08-26 21:02:57,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 207 flow. Second operand has 3 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) [2023-08-26 21:02:57,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:57,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2023-08-26 21:02:57,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand