/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/29_conditionals_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 21:01:43,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 21:01:43,347 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 21:01:43,352 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 21:01:43,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 21:01:43,385 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 21:01:43,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 21:01:43,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 21:01:43,391 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 21:01:43,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 21:01:43,395 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 21:01:43,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 21:01:43,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 21:01:43,397 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 21:01:43,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 21:01:43,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 21:01:43,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 21:01:43,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 21:01:43,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 21:01:43,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 21:01:43,398 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 21:01:43,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 21:01:43,399 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 21:01:43,400 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 21:01:43,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 21:01:43,400 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 21:01:43,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 21:01:43,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 21:01:43,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 21:01:43,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 21:01:43,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 21:01:43,402 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 21:01:43,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 21:01:43,403 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 21:01:43,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 21:01:43,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 21:01:43,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 21:01:43,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 21:01:43,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 21:01:43,755 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 21:01:43,755 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 21:01:43,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-08-26 21:01:44,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 21:01:45,248 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 21:01:45,248 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-08-26 21:01:45,273 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988dd7823/21ee6bc937494c87b19a84e30ab98056/FLAGfa4f81078 [2023-08-26 21:01:45,285 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988dd7823/21ee6bc937494c87b19a84e30ab98056 [2023-08-26 21:01:45,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 21:01:45,288 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 21:01:45,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 21:01:45,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 21:01:45,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 21:01:45,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e12c7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45, skipping insertion in model container [2023-08-26 21:01:45,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,336 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 21:01:45,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 21:01:45,622 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 21:01:45,650 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 21:01:45,652 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 21:01:45,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 21:01:45,703 INFO L206 MainTranslator]: Completed translation [2023-08-26 21:01:45,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45 WrapperNode [2023-08-26 21:01:45,704 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 21:01:45,705 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 21:01:45,706 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 21:01:45,706 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 21:01:45,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,739 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,761 INFO L138 Inliner]: procedures = 170, calls = 15, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 64 [2023-08-26 21:01:45,762 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 21:01:45,762 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 21:01:45,763 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 21:01:45,763 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 21:01:45,769 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,772 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,773 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,788 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,792 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 21:01:45,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 21:01:45,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 21:01:45,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 21:01:45,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (1/1) ... [2023-08-26 21:01:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 21:01:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 21:01:45,827 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 21:01:45,849 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 21:01:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 21:01:45,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 21:01:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 21:01:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 21:01:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 21:01:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 21:01:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 21:01:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 21:01:45,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 21:01:45,870 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 21:01:45,978 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 21:01:45,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 21:01:46,078 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 21:01:46,106 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 21:01:46,107 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 21:01:46,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:01:46 BoogieIcfgContainer [2023-08-26 21:01:46,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 21:01:46,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 21:01:46,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 21:01:46,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 21:01:46,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:01:45" (1/3) ... [2023-08-26 21:01:46,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fad0825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:01:46, skipping insertion in model container [2023-08-26 21:01:46,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:01:45" (2/3) ... [2023-08-26 21:01:46,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fad0825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:01:46, skipping insertion in model container [2023-08-26 21:01:46,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:01:46" (3/3) ... [2023-08-26 21:01:46,116 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-08-26 21:01:46,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 21:01:46,131 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-26 21:01:46,131 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 21:01:46,174 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:46,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 58 transitions, 121 flow [2023-08-26 21:01:46,232 INFO L124 PetriNetUnfolderBase]: 7/68 cut-off events. [2023-08-26 21:01:46,232 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:46,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 68 events. 7/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2023-08-26 21:01:46,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 58 transitions, 121 flow [2023-08-26 21:01:46,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 58 transitions, 121 flow [2023-08-26 21:01:46,244 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:46,252 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 58 transitions, 121 flow [2023-08-26 21:01:46,257 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 58 transitions, 121 flow [2023-08-26 21:01:46,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 58 transitions, 121 flow [2023-08-26 21:01:46,275 INFO L124 PetriNetUnfolderBase]: 7/68 cut-off events. [2023-08-26 21:01:46,275 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:46,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 68 events. 7/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2023-08-26 21:01:46,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 858 [2023-08-26 21:01:48,247 INFO L134 LiptonReduction]: Checked pairs total: 757 [2023-08-26 21:01:48,247 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-26 21:01:48,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:48,265 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:48,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-26 21:01:48,268 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:48,268 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-26 21:01:48,268 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:48,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:48,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:01:48,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-26 21:01:48,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:48,273 INFO L85 PathProgramCache]: Analyzing trace with hash 9341167, now seen corresponding path program 1 times [2023-08-26 21:01:48,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:48,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719013438] [2023-08-26 21:01:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:48,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:48,407 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 21:01:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719013438] [2023-08-26 21:01:48,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719013438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:48,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:01:48,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168354016] [2023-08-26 21:01:48,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:48,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:01:48,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:01:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:01:48,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 123 [2023-08-26 21:01:48,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 52.0) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 21:01:48,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:48,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 123 [2023-08-26 21:01:48,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:48,452 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-26 21:01:48,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:48,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-26 21:01:48,454 INFO L140 encePairwiseOnDemand]: 121/123 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-26 21:01:48,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-26 21:01:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:01:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:01:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 107 transitions. [2023-08-26 21:01:48,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2023-08-26 21:01:48,465 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 107 transitions. [2023-08-26 21:01:48,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 107 transitions. [2023-08-26 21:01:48,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:48,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 107 transitions. [2023-08-26 21:01:48,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 21:01:48,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 21:01:48,477 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 21:01:48,479 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 107 transitions. [2023-08-26 21:01:48,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-26 21:01:48,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 21:01:48,483 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-26 21:01:48,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-26 21:01:48,489 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-26 21:01:48,490 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-26 21:01:48,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 52.0) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 21:01:48,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:48,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 21:01:48,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 21:01:48,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-26 21:01:48,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash 386891863, now seen corresponding path program 1 times [2023-08-26 21:01:48,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:48,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933747777] [2023-08-26 21:01:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:48,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:48,588 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:48,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:48,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-26 21:01:48,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2023-08-26 21:01:48,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2023-08-26 21:01:48,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 21:01:48,592 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:01:48,595 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:01:48,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 21:01:48,631 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:48,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 92 transitions, 196 flow [2023-08-26 21:01:48,676 INFO L124 PetriNetUnfolderBase]: 13/114 cut-off events. [2023-08-26 21:01:48,677 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 21:01:48,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 114 events. 13/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 78. Up to 6 conditions per place. [2023-08-26 21:01:48,682 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 92 transitions, 196 flow [2023-08-26 21:01:48,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 92 transitions, 196 flow [2023-08-26 21:01:48,683 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:48,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 92 transitions, 196 flow [2023-08-26 21:01:48,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 92 transitions, 196 flow [2023-08-26 21:01:48,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 92 transitions, 196 flow [2023-08-26 21:01:48,707 INFO L124 PetriNetUnfolderBase]: 13/114 cut-off events. [2023-08-26 21:01:48,707 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 21:01:48,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 114 events. 13/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 78. Up to 6 conditions per place. [2023-08-26 21:01:48,714 INFO L119 LiptonReduction]: Number of co-enabled transitions 3960 [2023-08-26 21:01:50,883 INFO L134 LiptonReduction]: Checked pairs total: 3727 [2023-08-26 21:01:50,884 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-26 21:01:50,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:50,887 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:50,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-26 21:01:50,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:50,889 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-26 21:01:50,889 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:50,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:50,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:01:50,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 21:01:50,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:50,890 INFO L85 PathProgramCache]: Analyzing trace with hash 16227088, now seen corresponding path program 1 times [2023-08-26 21:01:50,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:50,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321679027] [2023-08-26 21:01:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:50,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:50,913 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 21:01:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321679027] [2023-08-26 21:01:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321679027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:50,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:01:50,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976739424] [2023-08-26 21:01:50,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:50,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:01:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:01:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:01:50,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 196 [2023-08-26 21:01:50,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:01:50,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:50,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 196 [2023-08-26 21:01:50,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:50,937 INFO L124 PetriNetUnfolderBase]: 20/57 cut-off events. [2023-08-26 21:01:50,937 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 21:01:50,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 157 event pairs, 20 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2023-08-26 21:01:50,938 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 8 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-08-26 21:01:50,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 50 flow [2023-08-26 21:01:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:01:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:01:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 168 transitions. [2023-08-26 21:01:50,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-26 21:01:50,940 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 168 transitions. [2023-08-26 21:01:50,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 168 transitions. [2023-08-26 21:01:50,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:50,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 168 transitions. [2023-08-26 21:01:50,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 84.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 21:01:50,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 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 21:01:50,943 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 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 21:01:50,944 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 2 states and 168 transitions. [2023-08-26 21:01:50,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 50 flow [2023-08-26 21:01:50,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 21:01:50,944 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 32 flow [2023-08-26 21:01:50,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-08-26 21:01:50,945 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -3 predicate places. [2023-08-26 21:01:50,945 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 32 flow [2023-08-26 21:01:50,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 21:01:50,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:50,946 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 21:01:50,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 21:01:50,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 21:01:50,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1276134912, now seen corresponding path program 1 times [2023-08-26 21:01:50,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:50,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156081442] [2023-08-26 21:01:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:50,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:50,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:50,972 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:50,973 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-26 21:01:50,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2023-08-26 21:01:50,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2023-08-26 21:01:50,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2023-08-26 21:01:50,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 21:01:50,974 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:01:50,974 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:01:50,974 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 21:01:50,993 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:50,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 126 transitions, 273 flow [2023-08-26 21:01:51,013 INFO L124 PetriNetUnfolderBase]: 19/160 cut-off events. [2023-08-26 21:01:51,013 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 21:01:51,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 160 events. 19/160 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 376 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 118. Up to 8 conditions per place. [2023-08-26 21:01:51,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 126 transitions, 273 flow [2023-08-26 21:01:51,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 126 transitions, 273 flow [2023-08-26 21:01:51,016 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:51,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 126 transitions, 273 flow [2023-08-26 21:01:51,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 126 transitions, 273 flow [2023-08-26 21:01:51,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 126 transitions, 273 flow [2023-08-26 21:01:51,035 INFO L124 PetriNetUnfolderBase]: 19/160 cut-off events. [2023-08-26 21:01:51,035 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 21:01:51,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 160 events. 19/160 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 376 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 118. Up to 8 conditions per place. [2023-08-26 21:01:51,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 9306 [2023-08-26 21:01:54,401 INFO L134 LiptonReduction]: Checked pairs total: 9640 [2023-08-26 21:01:54,401 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-26 21:01:54,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:54,404 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:54,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 21:01:54,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:54,406 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-26 21:01:54,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:54,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:54,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:01:54,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-26 21:01:54,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash 25484219, now seen corresponding path program 1 times [2023-08-26 21:01:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:54,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991078225] [2023-08-26 21:01:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:54,430 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 21:01:54,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:54,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991078225] [2023-08-26 21:01:54,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991078225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:54,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:54,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:01:54,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9275251] [2023-08-26 21:01:54,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:01:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:01:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:01:54,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 279 [2023-08-26 21:01:54,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 108.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 21:01:54,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:54,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 279 [2023-08-26 21:01:54,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:54,494 INFO L124 PetriNetUnfolderBase]: 110/225 cut-off events. [2023-08-26 21:01:54,494 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-26 21:01:54,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 893 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 127. Up to 191 conditions per place. [2023-08-26 21:01:54,496 INFO L140 encePairwiseOnDemand]: 275/279 looper letters, 11 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-08-26 21:01:54,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 71 flow [2023-08-26 21:01:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:01:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:01:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2023-08-26 21:01:54,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068100358422939 [2023-08-26 21:01:54,498 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2023-08-26 21:01:54,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2023-08-26 21:01:54,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:54,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2023-08-26 21:01:54,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 21:01:54,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states 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 21:01:54,502 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states 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 21:01:54,502 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 2 states and 227 transitions. [2023-08-26 21:01:54,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 71 flow [2023-08-26 21:01:54,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 65 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 21:01:54,503 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 43 flow [2023-08-26 21:01:54,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=43, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-08-26 21:01:54,504 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2023-08-26 21:01:54,505 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 43 flow [2023-08-26 21:01:54,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 108.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 21:01:54,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:54,505 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 21:01:54,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 21:01:54,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-26 21:01:54,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1226853216, now seen corresponding path program 1 times [2023-08-26 21:01:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:54,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436766006] [2023-08-26 21:01:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:54,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:54,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:54,535 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:54,536 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-26 21:01:54,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2023-08-26 21:01:54,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2023-08-26 21:01:54,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2023-08-26 21:01:54,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2023-08-26 21:01:54,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 21:01:54,537 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:01:54,537 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:01:54,537 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 21:01:54,556 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:54,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 160 transitions, 352 flow [2023-08-26 21:01:54,579 INFO L124 PetriNetUnfolderBase]: 25/206 cut-off events. [2023-08-26 21:01:54,579 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 21:01:54,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 206 events. 25/206 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 544 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 168. Up to 10 conditions per place. [2023-08-26 21:01:54,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 160 transitions, 352 flow [2023-08-26 21:01:54,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 160 transitions, 352 flow [2023-08-26 21:01:54,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:54,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 160 transitions, 352 flow [2023-08-26 21:01:54,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 160 transitions, 352 flow [2023-08-26 21:01:54,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 160 transitions, 352 flow [2023-08-26 21:01:54,603 INFO L124 PetriNetUnfolderBase]: 25/206 cut-off events. [2023-08-26 21:01:54,603 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 21:01:54,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 206 events. 25/206 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 544 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 168. Up to 10 conditions per place. [2023-08-26 21:01:54,614 INFO L119 LiptonReduction]: Number of co-enabled transitions 16896 [2023-08-26 21:01:58,005 INFO L134 LiptonReduction]: Checked pairs total: 16810 [2023-08-26 21:01:58,005 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-26 21:01:58,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:01:58,008 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:01:58,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 21:01:58,009 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:01:58,009 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-26 21:01:58,009 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:01:58,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:58,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:01:58,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 21:01:58,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash 37475149, now seen corresponding path program 1 times [2023-08-26 21:01:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:58,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509897072] [2023-08-26 21:01:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:01:58,035 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 21:01:58,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:01:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509897072] [2023-08-26 21:01:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509897072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:01:58,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:01:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:01:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293581133] [2023-08-26 21:01:58,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:01:58,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:01:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:01:58,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:01:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:01:58,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 351 [2023-08-26 21:01:58,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 80 flow. Second operand has 2 states, 2 states have (on average 136.0) internal successors, (272), 2 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 21:01:58,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:01:58,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 351 [2023-08-26 21:01:58,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:01:58,176 INFO L124 PetriNetUnfolderBase]: 488/837 cut-off events. [2023-08-26 21:01:58,177 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-08-26 21:01:58,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3931 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 511. Up to 731 conditions per place. [2023-08-26 21:01:58,182 INFO L140 encePairwiseOnDemand]: 345/351 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 21:01:58,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 94 flow [2023-08-26 21:01:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:01:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:01:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 288 transitions. [2023-08-26 21:01:58,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2023-08-26 21:01:58,186 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 288 transitions. [2023-08-26 21:01:58,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 288 transitions. [2023-08-26 21:01:58,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:01:58,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 288 transitions. [2023-08-26 21:01:58,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 21:01:58,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 21:01:58,191 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 21:01:58,191 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 80 flow. Second operand 2 states and 288 transitions. [2023-08-26 21:01:58,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 94 flow [2023-08-26 21:01:58,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 82 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-26 21:01:58,195 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 54 flow [2023-08-26 21:01:58,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-26 21:01:58,197 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-26 21:01:58,197 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 54 flow [2023-08-26 21:01:58,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 136.0) internal successors, (272), 2 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 21:01:58,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:01:58,198 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 21:01:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 21:01:58,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 21:01:58,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:01:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1701285442, now seen corresponding path program 1 times [2023-08-26 21:01:58,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:01:58,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585767878] [2023-08-26 21:01:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:01:58,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:01:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:58,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:01:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:01:58,262 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:01:58,262 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:01:58,263 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-26 21:01:58,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2023-08-26 21:01:58,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2023-08-26 21:01:58,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 6 remaining) [2023-08-26 21:01:58,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-26 21:01:58,263 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-26 21:01:58,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 21:01:58,264 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:01:58,264 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:01:58,264 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 21:01:58,296 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:01:58,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 194 transitions, 433 flow [2023-08-26 21:01:58,334 INFO L124 PetriNetUnfolderBase]: 31/252 cut-off events. [2023-08-26 21:01:58,337 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 21:01:58,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 252 events. 31/252 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 721 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 220. Up to 12 conditions per place. [2023-08-26 21:01:58,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 194 transitions, 433 flow [2023-08-26 21:01:58,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 194 transitions, 433 flow [2023-08-26 21:01:58,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:01:58,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 194 transitions, 433 flow [2023-08-26 21:01:58,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 194 transitions, 433 flow [2023-08-26 21:01:58,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 194 transitions, 433 flow [2023-08-26 21:01:58,372 INFO L124 PetriNetUnfolderBase]: 31/252 cut-off events. [2023-08-26 21:01:58,373 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 21:01:58,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 252 events. 31/252 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 721 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 220. Up to 12 conditions per place. [2023-08-26 21:01:58,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 26730 [2023-08-26 21:02:02,801 INFO L134 LiptonReduction]: Checked pairs total: 29501 [2023-08-26 21:02:02,802 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-26 21:02:02,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:02:02,805 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:02:02,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 21:02:02,806 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:02:02,806 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-26 21:02:02,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:02:02,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:02,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:02:02,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 4 more)] === [2023-08-26 21:02:02,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash 51679669, now seen corresponding path program 1 times [2023-08-26 21:02:02,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:02,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168889162] [2023-08-26 21:02:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:02,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:02,832 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 21:02:02,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:02,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168889162] [2023-08-26 21:02:02,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168889162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:02,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:02,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:02:02,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094917536] [2023-08-26 21:02:02,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:02,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:02:02,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:02,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:02:02,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:02:02,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 438 [2023-08-26 21:02:02,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 113 flow. Second operand has 2 states, 2 states have (on average 164.0) internal successors, (328), 2 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 21:02:02,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:02,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 438 [2023-08-26 21:02:02,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:03,183 INFO L124 PetriNetUnfolderBase]: 1946/2997 cut-off events. [2023-08-26 21:02:03,183 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2023-08-26 21:02:03,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 2997 events. 1946/2997 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15444 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 1924. Up to 2675 conditions per place. [2023-08-26 21:02:03,205 INFO L140 encePairwiseOnDemand]: 428/438 looper letters, 17 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-08-26 21:02:03,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 119 flow [2023-08-26 21:02:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:02:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:02:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 351 transitions. [2023-08-26 21:02:03,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006849315068493 [2023-08-26 21:02:03,207 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 351 transitions. [2023-08-26 21:02:03,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 351 transitions. [2023-08-26 21:02:03,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:03,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 351 transitions. [2023-08-26 21:02:03,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 175.5) internal successors, (351), 2 states have internal predecessors, (351), 0 states have call successors, (0), 0 states 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 21:02:03,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:02:03,211 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states 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 21:02:03,211 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 113 flow. Second operand 2 states and 351 transitions. [2023-08-26 21:02:03,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 119 flow [2023-08-26 21:02:03,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 99 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-26 21:02:03,216 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 65 flow [2023-08-26 21:02:03,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=65, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-26 21:02:03,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -9 predicate places. [2023-08-26 21:02:03,218 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 65 flow [2023-08-26 21:02:03,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 164.0) internal successors, (328), 2 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 21:02:03,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:03,219 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:03,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 21:02:03,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 4 more)] === [2023-08-26 21:02:03,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1344724677, now seen corresponding path program 1 times [2023-08-26 21:02:03,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:03,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673784533] [2023-08-26 21:02:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:03,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:03,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:02:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:03,275 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:02:03,276 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:02:03,276 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-26 21:02:03,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2023-08-26 21:02:03,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 7 remaining) [2023-08-26 21:02:03,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 7 remaining) [2023-08-26 21:02:03,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 21:02:03,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 21:02:03,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 21:02:03,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 21:02:03,277 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:02:03,278 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:02:03,278 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 21:02:03,301 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:02:03,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 228 transitions, 516 flow [2023-08-26 21:02:03,337 INFO L124 PetriNetUnfolderBase]: 37/298 cut-off events. [2023-08-26 21:02:03,337 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 21:02:03,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 298 events. 37/298 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 871 event pairs, 0 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 274. Up to 14 conditions per place. [2023-08-26 21:02:03,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 228 transitions, 516 flow [2023-08-26 21:02:03,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 228 transitions, 516 flow [2023-08-26 21:02:03,345 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:02:03,345 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 228 transitions, 516 flow [2023-08-26 21:02:03,345 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 228 transitions, 516 flow [2023-08-26 21:02:03,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 228 transitions, 516 flow [2023-08-26 21:02:03,379 INFO L124 PetriNetUnfolderBase]: 37/298 cut-off events. [2023-08-26 21:02:03,379 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 21:02:03,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 298 events. 37/298 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 871 event pairs, 0 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 274. Up to 14 conditions per place. [2023-08-26 21:02:03,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 38808 [2023-08-26 21:02:08,254 INFO L134 LiptonReduction]: Checked pairs total: 38841 [2023-08-26 21:02:08,254 INFO L136 LiptonReduction]: Total number of compositions: 273 [2023-08-26 21:02:08,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:02:08,256 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:02:08,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-26 21:02:08,257 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:02:08,258 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-26 21:02:08,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:02:08,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:08,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:02:08,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 5 more)] === [2023-08-26 21:02:08,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash 68282713, now seen corresponding path program 1 times [2023-08-26 21:02:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:08,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847120985] [2023-08-26 21:02:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:08,280 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 21:02:08,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:08,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847120985] [2023-08-26 21:02:08,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847120985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:08,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:08,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:02:08,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955312533] [2023-08-26 21:02:08,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:02:08,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:02:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:02:08,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 501 [2023-08-26 21:02:08,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 21:02:08,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:08,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 501 [2023-08-26 21:02:08,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:09,491 INFO L124 PetriNetUnfolderBase]: 7292/10449 cut-off events. [2023-08-26 21:02:09,491 INFO L125 PetriNetUnfolderBase]: For 9628/9628 co-relation queries the response was YES. [2023-08-26 21:02:09,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57460 event pairs, 7292 based on Foata normal form. 0/10084 useless extension candidates. Maximal degree in co-relation 6946. Up to 9479 conditions per place. [2023-08-26 21:02:09,559 INFO L140 encePairwiseOnDemand]: 490/501 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-08-26 21:02:09,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 146 flow [2023-08-26 21:02:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:02:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:02:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 411 transitions. [2023-08-26 21:02:09,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101796407185629 [2023-08-26 21:02:09,563 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 411 transitions. [2023-08-26 21:02:09,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 411 transitions. [2023-08-26 21:02:09,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:09,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 411 transitions. [2023-08-26 21:02:09,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:09,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states 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 21:02:09,567 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states 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 21:02:09,567 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 136 flow. Second operand 2 states and 411 transitions. [2023-08-26 21:02:09,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 146 flow [2023-08-26 21:02:09,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 116 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-26 21:02:09,578 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 76 flow [2023-08-26 21:02:09,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=501, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-26 21:02:09,580 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -10 predicate places. [2023-08-26 21:02:09,580 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 76 flow [2023-08-26 21:02:09,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 21:02:09,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:09,581 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:09,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 21:02:09,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 5 more)] === [2023-08-26 21:02:09,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:09,581 INFO L85 PathProgramCache]: Analyzing trace with hash -300410607, now seen corresponding path program 1 times [2023-08-26 21:02:09,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:09,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092123235] [2023-08-26 21:02:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:09,601 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:02:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:09,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:02:09,621 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:02:09,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-26 21:02:09,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (6 of 8 remaining) [2023-08-26 21:02:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 8 remaining) [2023-08-26 21:02:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 8 remaining) [2023-08-26 21:02:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 8 remaining) [2023-08-26 21:02:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 8 remaining) [2023-08-26 21:02:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 8 remaining) [2023-08-26 21:02:09,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 8 remaining) [2023-08-26 21:02:09,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 21:02:09,623 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:02:09,624 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:02:09,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 21:02:09,656 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:02:09,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 262 transitions, 601 flow [2023-08-26 21:02:09,697 INFO L124 PetriNetUnfolderBase]: 43/344 cut-off events. [2023-08-26 21:02:09,697 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-26 21:02:09,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 344 events. 43/344 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1065 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-08-26 21:02:09,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 262 transitions, 601 flow [2023-08-26 21:02:09,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 262 transitions, 601 flow [2023-08-26 21:02:09,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:02:09,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 262 transitions, 601 flow [2023-08-26 21:02:09,711 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 262 transitions, 601 flow [2023-08-26 21:02:09,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 262 transitions, 601 flow [2023-08-26 21:02:09,755 INFO L124 PetriNetUnfolderBase]: 43/344 cut-off events. [2023-08-26 21:02:09,755 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-26 21:02:09,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 344 events. 43/344 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1065 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-08-26 21:02:09,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 53130 [2023-08-26 21:02:15,515 INFO L134 LiptonReduction]: Checked pairs total: 55080 [2023-08-26 21:02:15,515 INFO L136 LiptonReduction]: Total number of compositions: 327 [2023-08-26 21:02:15,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:02:15,517 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:02:15,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 21:02:15,518 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:02:15,518 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-26 21:02:15,519 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:02:15,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:15,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:02:15,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 6 more)] === [2023-08-26 21:02:15,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash 86745424, now seen corresponding path program 1 times [2023-08-26 21:02:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:15,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400338811] [2023-08-26 21:02:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:15,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:15,539 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 21:02:15,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400338811] [2023-08-26 21:02:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400338811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:15,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:15,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:02:15,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584284499] [2023-08-26 21:02:15,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:15,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:02:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:02:15,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:02:15,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 589 [2023-08-26 21:02:15,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 157 flow. Second operand has 2 states, 2 states have (on average 220.0) internal successors, (440), 2 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 21:02:15,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:15,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 589 [2023-08-26 21:02:15,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:19,054 INFO L124 PetriNetUnfolderBase]: 26246/35721 cut-off events. [2023-08-26 21:02:19,055 INFO L125 PetriNetUnfolderBase]: For 40003/40003 co-relation queries the response was YES. [2023-08-26 21:02:19,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81840 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 206008 event pairs, 26246 based on Foata normal form. 0/34627 useless extension candidates. Maximal degree in co-relation 24361. Up to 32807 conditions per place. [2023-08-26 21:02:19,303 INFO L140 encePairwiseOnDemand]: 578/589 looper letters, 23 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-08-26 21:02:19,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 175 flow [2023-08-26 21:02:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:02:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:02:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 470 transitions. [2023-08-26 21:02:19,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398981324278438 [2023-08-26 21:02:19,308 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 470 transitions. [2023-08-26 21:02:19,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 470 transitions. [2023-08-26 21:02:19,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:19,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 470 transitions. [2023-08-26 21:02:19,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 235.0) internal successors, (470), 2 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 21:02:19,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 589.0) internal successors, (1767), 3 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states 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 21:02:19,313 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 589.0) internal successors, (1767), 3 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states 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 21:02:19,313 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 157 flow. Second operand 2 states and 470 transitions. [2023-08-26 21:02:19,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 175 flow [2023-08-26 21:02:19,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 133 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-08-26 21:02:19,378 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 87 flow [2023-08-26 21:02:19,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=589, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=87, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-08-26 21:02:19,379 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2023-08-26 21:02:19,379 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 87 flow [2023-08-26 21:02:19,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 220.0) internal successors, (440), 2 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 21:02:19,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:19,380 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:19,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 21:02:19,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 6 more)] === [2023-08-26 21:02:19,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash 998985804, now seen corresponding path program 1 times [2023-08-26 21:02:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:19,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238270560] [2023-08-26 21:02:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:19,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:19,403 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:02:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:19,426 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:02:19,426 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:02:19,426 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-26 21:02:19,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (7 of 9 remaining) [2023-08-26 21:02:19,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (6 of 9 remaining) [2023-08-26 21:02:19,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 9 remaining) [2023-08-26 21:02:19,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 9 remaining) [2023-08-26 21:02:19,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 21:02:19,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 9 remaining) [2023-08-26 21:02:19,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 9 remaining) [2023-08-26 21:02:19,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 21:02:19,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 21:02:19,428 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:02:19,429 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:02:19,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 21:02:19,466 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:02:19,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 296 transitions, 688 flow [2023-08-26 21:02:19,528 INFO L124 PetriNetUnfolderBase]: 49/390 cut-off events. [2023-08-26 21:02:19,529 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-26 21:02:19,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 390 events. 49/390 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1222 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 385. Up to 18 conditions per place. [2023-08-26 21:02:19,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 296 transitions, 688 flow [2023-08-26 21:02:19,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 296 transitions, 688 flow [2023-08-26 21:02:19,541 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:02:19,541 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 296 transitions, 688 flow [2023-08-26 21:02:19,541 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 296 transitions, 688 flow [2023-08-26 21:02:19,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 296 transitions, 688 flow [2023-08-26 21:02:19,601 INFO L124 PetriNetUnfolderBase]: 49/390 cut-off events. [2023-08-26 21:02:19,601 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-26 21:02:19,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 390 events. 49/390 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1222 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 385. Up to 18 conditions per place. [2023-08-26 21:02:19,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 69696 [2023-08-26 21:02:25,832 INFO L134 LiptonReduction]: Checked pairs total: 73914 [2023-08-26 21:02:25,833 INFO L136 LiptonReduction]: Total number of compositions: 363 [2023-08-26 21:02:25,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:02:25,834 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:02:25,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 21:02:25,836 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:02:25,836 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-26 21:02:25,836 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:02:25,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:25,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:02:25,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 7 more)] === [2023-08-26 21:02:25,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 108354359, now seen corresponding path program 1 times [2023-08-26 21:02:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:25,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095585191] [2023-08-26 21:02:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:25,857 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 21:02:25,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095585191] [2023-08-26 21:02:25,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095585191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:25,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:25,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:02:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618420] [2023-08-26 21:02:25,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:25,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:02:25,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:02:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:02:25,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 659 [2023-08-26 21:02:25,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 200 flow. Second operand has 2 states, 2 states have (on average 248.0) internal successors, (496), 2 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 21:02:25,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:25,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 659 [2023-08-26 21:02:25,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:02:37,053 INFO L124 PetriNetUnfolderBase]: 91856/120285 cut-off events. [2023-08-26 21:02:37,053 INFO L125 PetriNetUnfolderBase]: For 158830/158830 co-relation queries the response was YES. [2023-08-26 21:02:37,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277213 conditions, 120285 events. 91856/120285 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 715858 event pairs, 91856 based on Foata normal form. 0/117005 useless extension candidates. Maximal degree in co-relation 83653. Up to 111539 conditions per place. [2023-08-26 21:02:37,895 INFO L140 encePairwiseOnDemand]: 643/659 looper letters, 26 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-08-26 21:02:37,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 29 transitions, 206 flow [2023-08-26 21:02:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:02:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:02:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 534 transitions. [2023-08-26 21:02:37,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40515933232169954 [2023-08-26 21:02:37,901 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 534 transitions. [2023-08-26 21:02:37,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 534 transitions. [2023-08-26 21:02:37,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:02:37,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 534 transitions. [2023-08-26 21:02:37,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 267.0) internal successors, (534), 2 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 21:02:37,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 659.0) internal successors, (1977), 3 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 21:02:37,911 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 659.0) internal successors, (1977), 3 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states 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 21:02:37,911 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 200 flow. Second operand 2 states and 534 transitions. [2023-08-26 21:02:37,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 29 transitions, 206 flow [2023-08-26 21:02:38,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 150 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-08-26 21:02:38,120 INFO L231 Difference]: Finished difference. Result has 47 places, 29 transitions, 98 flow [2023-08-26 21:02:38,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2023-08-26 21:02:38,122 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -15 predicate places. [2023-08-26 21:02:38,122 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 98 flow [2023-08-26 21:02:38,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 248.0) internal successors, (496), 2 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 21:02:38,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:38,123 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:02:38,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 21:02:38,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 7 more)] === [2023-08-26 21:02:38,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1003753953, now seen corresponding path program 1 times [2023-08-26 21:02:38,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:38,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843639899] [2023-08-26 21:02:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:38,140 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:02:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:02:38,154 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:02:38,154 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:02:38,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-26 21:02:38,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (8 of 10 remaining) [2023-08-26 21:02:38,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (7 of 10 remaining) [2023-08-26 21:02:38,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (6 of 10 remaining) [2023-08-26 21:02:38,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 10 remaining) [2023-08-26 21:02:38,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 10 remaining) [2023-08-26 21:02:38,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 21:02:38,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 10 remaining) [2023-08-26 21:02:38,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 10 remaining) [2023-08-26 21:02:38,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 10 remaining) [2023-08-26 21:02:38,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 21:02:38,156 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:02:38,157 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:02:38,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 21:02:38,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:02:38,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 330 transitions, 777 flow [2023-08-26 21:02:38,242 INFO L124 PetriNetUnfolderBase]: 55/436 cut-off events. [2023-08-26 21:02:38,242 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-26 21:02:38,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 436 events. 55/436 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1394 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 442. Up to 20 conditions per place. [2023-08-26 21:02:38,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 330 transitions, 777 flow [2023-08-26 21:02:38,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 303 places, 330 transitions, 777 flow [2023-08-26 21:02:38,252 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:02:38,252 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 303 places, 330 transitions, 777 flow [2023-08-26 21:02:38,252 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 303 places, 330 transitions, 777 flow [2023-08-26 21:02:38,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 330 transitions, 777 flow [2023-08-26 21:02:38,295 INFO L124 PetriNetUnfolderBase]: 55/436 cut-off events. [2023-08-26 21:02:38,295 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-26 21:02:38,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 436 events. 55/436 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1394 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 442. Up to 20 conditions per place. [2023-08-26 21:02:38,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 88506 [2023-08-26 21:02:44,932 INFO L134 LiptonReduction]: Checked pairs total: 95261 [2023-08-26 21:02:44,932 INFO L136 LiptonReduction]: Total number of compositions: 406 [2023-08-26 21:02:44,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:02:44,934 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:02:44,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 21:02:44,935 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:02:44,935 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-26 21:02:44,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:02:44,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:02:44,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:02:44,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 8 more)] === [2023-08-26 21:02:44,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:02:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 131924038, now seen corresponding path program 1 times [2023-08-26 21:02:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:02:44,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453615489] [2023-08-26 21:02:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:02:44,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:02:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:02:44,959 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 21:02:44,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:02:44,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453615489] [2023-08-26 21:02:44,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453615489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:02:44,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:02:44,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:02:44,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397715610] [2023-08-26 21:02:44,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:02:44,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:02:44,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:02:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:02:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:02:44,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 736 [2023-08-26 21:02:44,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 229 flow. Second operand has 2 states, 2 states have (on average 276.0) internal successors, (552), 2 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 21:02:44,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:02:44,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 736 [2023-08-26 21:02:44,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 21:03:23,888 INFO L124 PetriNetUnfolderBase]: 314930/400221 cut-off events. [2023-08-26 21:03:23,888 INFO L125 PetriNetUnfolderBase]: For 609352/609352 co-relation queries the response was YES. [2023-08-26 21:03:25,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926753 conditions, 400221 events. 314930/400221 cut-off events. For 609352/609352 co-relation queries the response was YES. Maximal size of possible extension queue 11911. Compared 2456264 event pairs, 314930 based on Foata normal form. 0/390380 useless extension candidates. Maximal degree in co-relation 282670. Up to 373979 conditions per place. [2023-08-26 21:03:26,532 INFO L140 encePairwiseOnDemand]: 719/736 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-26 21:03:26,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 32 transitions, 239 flow [2023-08-26 21:03:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 21:03:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 21:03:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 594 transitions. [2023-08-26 21:03:26,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40353260869565216 [2023-08-26 21:03:26,534 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 594 transitions. [2023-08-26 21:03:26,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 594 transitions. [2023-08-26 21:03:26,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 21:03:26,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 594 transitions. [2023-08-26 21:03:26,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 297.0) internal successors, (594), 2 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 21:03:26,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 736.0) internal successors, (2208), 3 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states 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 21:03:26,539 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 736.0) internal successors, (2208), 3 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states 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 21:03:26,539 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 229 flow. Second operand 2 states and 594 transitions. [2023-08-26 21:03:26,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 32 transitions, 239 flow [2023-08-26 21:03:27,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 167 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-08-26 21:03:27,061 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 109 flow [2023-08-26 21:03:27,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=736, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=109, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-08-26 21:03:27,061 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -16 predicate places. [2023-08-26 21:03:27,062 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 109 flow [2023-08-26 21:03:27,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 276.0) internal successors, (552), 2 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 21:03:27,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:03:27,062 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 21:03:27,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 21:03:27,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 8 more)] === [2023-08-26 21:03:27,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:03:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1913591799, now seen corresponding path program 1 times [2023-08-26 21:03:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:03:27,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891903365] [2023-08-26 21:03:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:03:27,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:03:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:03:27,077 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 21:03:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 21:03:27,089 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 21:03:27,089 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 21:03:27,090 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-26 21:03:27,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (9 of 11 remaining) [2023-08-26 21:03:27,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (8 of 11 remaining) [2023-08-26 21:03:27,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (7 of 11 remaining) [2023-08-26 21:03:27,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (6 of 11 remaining) [2023-08-26 21:03:27,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 11 remaining) [2023-08-26 21:03:27,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 11 remaining) [2023-08-26 21:03:27,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 11 remaining) [2023-08-26 21:03:27,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 21:03:27,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 11 remaining) [2023-08-26 21:03:27,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 11 remaining) [2023-08-26 21:03:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 21:03:27,091 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 21:03:27,092 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 21:03:27,092 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 21:03:27,125 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 21:03:27,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 364 transitions, 868 flow [2023-08-26 21:03:27,180 INFO L124 PetriNetUnfolderBase]: 61/482 cut-off events. [2023-08-26 21:03:27,180 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-26 21:03:27,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 482 events. 61/482 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1567 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 500. Up to 22 conditions per place. [2023-08-26 21:03:27,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 364 transitions, 868 flow [2023-08-26 21:03:27,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 364 transitions, 868 flow [2023-08-26 21:03:27,193 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 21:03:27,193 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 364 transitions, 868 flow [2023-08-26 21:03:27,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 364 transitions, 868 flow [2023-08-26 21:03:27,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 364 transitions, 868 flow [2023-08-26 21:03:27,244 INFO L124 PetriNetUnfolderBase]: 61/482 cut-off events. [2023-08-26 21:03:27,244 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-26 21:03:27,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 482 events. 61/482 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1567 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 500. Up to 22 conditions per place. [2023-08-26 21:03:27,273 INFO L119 LiptonReduction]: Number of co-enabled transitions 109560 [2023-08-26 21:03:34,771 INFO L134 LiptonReduction]: Checked pairs total: 112842 [2023-08-26 21:03:34,771 INFO L136 LiptonReduction]: Total number of compositions: 445 [2023-08-26 21:03:34,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 21:03:34,773 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;@76353c2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 21:03:34,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-26 21:03:34,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 21:03:34,774 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-26 21:03:34,774 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 21:03:34,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 21:03:34,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 21:03:34,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 9 more)] === [2023-08-26 21:03:34,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 21:03:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash 157721883, now seen corresponding path program 1 times [2023-08-26 21:03:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 21:03:34,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144627863] [2023-08-26 21:03:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 21:03:34,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 21:03:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 21:03:34,799 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 21:03:34,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 21:03:34,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144627863] [2023-08-26 21:03:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144627863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 21:03:34,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 21:03:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 21:03:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188989805] [2023-08-26 21:03:34,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 21:03:34,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 21:03:34,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 21:03:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 21:03:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 21:03:34,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 809 [2023-08-26 21:03:34,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 260 flow. Second operand has 2 states, 2 states have (on average 304.0) internal successors, (608), 2 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 21:03:34,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 21:03:34,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 809 [2023-08-26 21:03:34,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand