/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:09:08,985 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:09:09,461 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:09:09,465 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:09:09,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:09:09,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:09:09,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:09:09,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:09:09,484 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:09:09,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:09:09,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:09:09,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:09:09,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:09:09,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:09:09,487 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:09:09,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:09:09,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:09:09,488 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:09:09,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:09:09,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:09:09,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:09:09,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:09:09,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:09:09,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:09:09,490 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:09:09,490 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:09:09,490 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:09:09,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:09:09,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:09:09,491 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:09:09,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:09:09,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:09:09,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:09:09,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:09:09,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:09:09,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:09:09,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:09:09,493 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:09:09,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:09:09,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:09:09,494 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:09:09,494 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:09:09,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:09:09,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:09:09,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:09:09,690 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:09:09,691 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:09:09,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-symm.wvr_bound2.c [2023-08-04 02:09:10,944 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:09:11,143 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:09:11,144 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-symm.wvr_bound2.c [2023-08-04 02:09:11,150 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/440c5d8af/e7665fa948eb44599d04f572aac17d79/FLAGe69af0920 [2023-08-04 02:09:11,161 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/440c5d8af/e7665fa948eb44599d04f572aac17d79 [2023-08-04 02:09:11,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:09:11,165 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:09:11,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:09:11,166 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:09:11,168 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:09:11,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4995d0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11, skipping insertion in model container [2023-08-04 02:09:11,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,190 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:09:11,348 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-symm.wvr_bound2.c[5091,5104] [2023-08-04 02:09:11,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:09:11,361 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:09:11,390 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-symm.wvr_bound2.c[5091,5104] [2023-08-04 02:09:11,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:09:11,405 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:09:11,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11 WrapperNode [2023-08-04 02:09:11,406 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:09:11,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:09:11,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:09:11,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:09:11,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,421 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,456 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 438 [2023-08-04 02:09:11,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:09:11,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:09:11,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:09:11,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:09:11,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,469 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,469 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,479 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,484 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:09:11,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:09:11,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:09:11,493 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:09:11,494 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (1/1) ... [2023-08-04 02:09:11,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:09:11,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:11,546 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) [2023-08-04 02:09:11,571 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 [2023-08-04 02:09:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:09:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:09:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:09:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:09:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:09:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:09:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:09:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:09:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:09:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:09:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:09:11,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:09:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:09:11,591 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:09:11,719 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:09:11,721 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:09:12,323 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:09:12,333 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:09:12,334 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 02:09:12,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:09:12 BoogieIcfgContainer [2023-08-04 02:09:12,336 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:09:12,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:09:12,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:09:12,346 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:09:12,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:09:11" (1/3) ... [2023-08-04 02:09:12,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537c8103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:09:12, skipping insertion in model container [2023-08-04 02:09:12,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:11" (2/3) ... [2023-08-04 02:09:12,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537c8103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:09:12, skipping insertion in model container [2023-08-04 02:09:12,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:09:12" (3/3) ... [2023-08-04 02:09:12,349 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-nzb-file-symm.wvr_bound2.c [2023-08-04 02:09:12,356 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:09:12,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:09:12,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:09:12,363 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:09:12,536 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:09:12,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 02:09:12,851 INFO L124 PetriNetUnfolderBase]: 94/801 cut-off events. [2023-08-04 02:09:12,851 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 02:09:12,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 801 events. 94/801 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3686 event pairs, 0 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-08-04 02:09:12,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 02:09:12,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 463 places, 515 transitions, 1052 flow [2023-08-04 02:09:12,886 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:09:12,898 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 463 places, 515 transitions, 1052 flow [2023-08-04 02:09:12,904 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 463 places, 515 transitions, 1052 flow [2023-08-04 02:09:12,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 515 transitions, 1052 flow [2023-08-04 02:09:13,048 INFO L124 PetriNetUnfolderBase]: 94/801 cut-off events. [2023-08-04 02:09:13,048 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 02:09:13,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 801 events. 94/801 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3686 event pairs, 0 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-08-04 02:09:13,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 82992 [2023-08-04 02:09:27,427 INFO L134 LiptonReduction]: Checked pairs total: 96184 [2023-08-04 02:09:27,427 INFO L136 LiptonReduction]: Total number of compositions: 604 [2023-08-04 02:09:27,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:09:27,445 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=true, 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;@30b91c24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:09:27,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:09:27,451 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:09:27,451 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 02:09:27,451 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:09:27,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:27,452 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:27,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:09:27,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:27,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1630402001, now seen corresponding path program 1 times [2023-08-04 02:09:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327618609] [2023-08-04 02:09:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:09:27,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327618609] [2023-08-04 02:09:27,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327618609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:09:27,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:09:27,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:09:27,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49907474] [2023-08-04 02:09:27,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:09:27,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:09:27,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:09:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:09:27,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 1119 [2023-08-04 02:09:27,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 63 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:27,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:27,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 1119 [2023-08-04 02:09:27,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:28,493 INFO L124 PetriNetUnfolderBase]: 3861/5565 cut-off events. [2023-08-04 02:09:28,494 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2023-08-04 02:09:28,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10993 conditions, 5565 events. 3861/5565 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 24896 event pairs, 2580 based on Foata normal form. 0/3691 useless extension candidates. Maximal degree in co-relation 10245. Up to 5324 conditions per place. [2023-08-04 02:09:28,515 INFO L140 encePairwiseOnDemand]: 1113/1119 looper letters, 44 selfloop transitions, 4 changer transitions 12/64 dead transitions. [2023-08-04 02:09:28,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 266 flow [2023-08-04 02:09:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:09:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:09:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1474 transitions. [2023-08-04 02:09:28,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390825141495383 [2023-08-04 02:09:28,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1474 transitions. [2023-08-04 02:09:28,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1474 transitions. [2023-08-04 02:09:28,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:28,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1474 transitions. [2023-08-04 02:09:28,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 491.3333333333333) internal successors, (1474), 3 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:28,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:28,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1119.0) internal successors, (4476), 4 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:28,556 INFO L175 Difference]: Start difference. First operand has 51 places, 63 transitions, 148 flow. Second operand 3 states and 1474 transitions. [2023-08-04 02:09:28,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 266 flow [2023-08-04 02:09:28,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:09:28,562 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 132 flow [2023-08-04 02:09:28,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-04 02:09:28,566 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 02:09:28,566 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 132 flow [2023-08-04 02:09:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:28,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:28,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:09:28,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:09:28,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:28,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1516413198, now seen corresponding path program 1 times [2023-08-04 02:09:28,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:28,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806682445] [2023-08-04 02:09:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:28,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:09:28,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:28,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806682445] [2023-08-04 02:09:28,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806682445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:09:28,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615941783] [2023-08-04 02:09:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:28,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:09:28,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:28,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:09:28,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:09:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:28,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:09:28,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:09:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:09:28,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:09:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:09:28,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615941783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:09:28,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:09:28,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:09:28,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597711935] [2023-08-04 02:09:28,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:09:28,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:09:28,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:09:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:09:28,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 1119 [2023-08-04 02:09:29,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 132 flow. Second operand has 8 states, 8 states have (on average 468.75) internal successors, (3750), 8 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:29,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:29,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 1119 [2023-08-04 02:09:29,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:29,353 INFO L124 PetriNetUnfolderBase]: 1796/2630 cut-off events. [2023-08-04 02:09:29,353 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 02:09:29,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5217 conditions, 2630 events. 1796/2630 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10293 event pairs, 1188 based on Foata normal form. 3/1796 useless extension candidates. Maximal degree in co-relation 5185. Up to 2516 conditions per place. [2023-08-04 02:09:29,366 INFO L140 encePairwiseOnDemand]: 1114/1119 looper letters, 44 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2023-08-04 02:09:29,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 264 flow [2023-08-04 02:09:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:09:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:09:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2862 transitions. [2023-08-04 02:09:29,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262734584450402 [2023-08-04 02:09:29,373 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2862 transitions. [2023-08-04 02:09:29,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2862 transitions. [2023-08-04 02:09:29,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:29,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2862 transitions. [2023-08-04 02:09:29,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 477.0) internal successors, (2862), 6 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:29,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1119.0) internal successors, (7833), 7 states have internal predecessors, (7833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:29,394 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1119.0) internal successors, (7833), 7 states have internal predecessors, (7833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:29,395 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 132 flow. Second operand 6 states and 2862 transitions. [2023-08-04 02:09:29,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 264 flow [2023-08-04 02:09:29,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:09:29,397 INFO L231 Difference]: Finished difference. Result has 52 places, 58 transitions, 194 flow [2023-08-04 02:09:29,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=52, PETRI_TRANSITIONS=58} [2023-08-04 02:09:29,398 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-04 02:09:29,398 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 58 transitions, 194 flow [2023-08-04 02:09:29,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 468.75) internal successors, (3750), 8 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:29,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:29,401 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:29,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:09:29,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:09:29,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:09:29,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -918069137, now seen corresponding path program 2 times [2023-08-04 02:09:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:29,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595440635] [2023-08-04 02:09:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:09:29,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:29,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595440635] [2023-08-04 02:09:29,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595440635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:09:29,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530066850] [2023-08-04 02:09:29,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:09:29,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:09:29,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:29,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:09:29,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:09:29,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:09:29,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:09:29,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:09:29,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:09:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:09:30,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:09:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:09:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530066850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:09:30,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:09:30,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-04 02:09:30,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185791794] [2023-08-04 02:09:30,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:09:30,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:09:30,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:30,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:09:30,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:09:30,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 467 out of 1119 [2023-08-04 02:09:30,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 58 transitions, 194 flow. Second operand has 17 states, 17 states have (on average 468.3529411764706) internal successors, (7962), 17 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:30,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:30,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 467 of 1119 [2023-08-04 02:09:30,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:30,619 INFO L124 PetriNetUnfolderBase]: 1796/2632 cut-off events. [2023-08-04 02:09:30,619 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 02:09:30,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5247 conditions, 2632 events. 1796/2632 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10275 event pairs, 1188 based on Foata normal form. 1/1796 useless extension candidates. Maximal degree in co-relation 5176. Up to 2516 conditions per place. [2023-08-04 02:09:30,632 INFO L140 encePairwiseOnDemand]: 1114/1119 looper letters, 44 selfloop transitions, 12 changer transitions 0/60 dead transitions. [2023-08-04 02:09:30,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 318 flow [2023-08-04 02:09:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:09:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:09:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3327 transitions. [2023-08-04 02:09:30,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247414783607813 [2023-08-04 02:09:30,642 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3327 transitions. [2023-08-04 02:09:30,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3327 transitions. [2023-08-04 02:09:30,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:30,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3327 transitions. [2023-08-04 02:09:30,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 475.2857142857143) internal successors, (3327), 7 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:30,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1119.0) internal successors, (8952), 8 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:30,665 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1119.0) internal successors, (8952), 8 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:30,665 INFO L175 Difference]: Start difference. First operand has 52 places, 58 transitions, 194 flow. Second operand 7 states and 3327 transitions. [2023-08-04 02:09:30,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 318 flow [2023-08-04 02:09:30,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 302 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 02:09:30,670 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 224 flow [2023-08-04 02:09:30,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1119, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-04 02:09:30,672 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 02:09:30,672 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 224 flow [2023-08-04 02:09:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 468.3529411764706) internal successors, (7962), 17 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:30,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:30,675 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:30,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:09:30,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 02:09:30,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:09:30,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:30,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1851321266, now seen corresponding path program 3 times [2023-08-04 02:09:30,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:30,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9730944] [2023-08-04 02:09:30,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:09:30,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:09:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:09:30,961 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:09:30,961 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:09:30,962 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:09:30,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:09:30,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:09:30,964 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 02:09:30,965 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:09:30,966 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:09:30,966 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:09:31,031 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:09:31,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 741 places, 833 transitions, 1714 flow [2023-08-04 02:09:31,653 INFO L124 PetriNetUnfolderBase]: 285/2106 cut-off events. [2023-08-04 02:09:31,654 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 02:09:31,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 2106 events. 285/2106 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 15060 event pairs, 2 based on Foata normal form. 0/1818 useless extension candidates. Maximal degree in co-relation 1329. Up to 32 conditions per place. [2023-08-04 02:09:31,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 741 places, 833 transitions, 1714 flow [2023-08-04 02:09:31,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 741 places, 833 transitions, 1714 flow [2023-08-04 02:09:31,765 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:09:31,765 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 741 places, 833 transitions, 1714 flow [2023-08-04 02:09:31,766 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 741 places, 833 transitions, 1714 flow [2023-08-04 02:09:31,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 741 places, 833 transitions, 1714 flow [2023-08-04 02:09:32,367 INFO L124 PetriNetUnfolderBase]: 285/2106 cut-off events. [2023-08-04 02:09:32,368 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 02:09:32,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 2106 events. 285/2106 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 15060 event pairs, 2 based on Foata normal form. 0/1818 useless extension candidates. Maximal degree in co-relation 1329. Up to 32 conditions per place. [2023-08-04 02:09:32,653 INFO L119 LiptonReduction]: Number of co-enabled transitions 366912 [2023-08-04 02:09:50,155 INFO L134 LiptonReduction]: Checked pairs total: 704933 [2023-08-04 02:09:50,155 INFO L136 LiptonReduction]: Total number of compositions: 905 [2023-08-04 02:09:50,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:09:50,158 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=true, 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;@30b91c24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:09:50,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:09:50,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:09:50,167 INFO L124 PetriNetUnfolderBase]: 18/121 cut-off events. [2023-08-04 02:09:50,167 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:09:50,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:50,168 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:50,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:09:50,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash 170316134, now seen corresponding path program 1 times [2023-08-04 02:09:50,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:50,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41082686] [2023-08-04 02:09:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:09:50,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:50,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41082686] [2023-08-04 02:09:50,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41082686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:09:50,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:09:50,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:09:50,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357696995] [2023-08-04 02:09:50,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:09:50,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:09:50,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:50,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:09:50,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:09:50,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 765 out of 1738 [2023-08-04 02:09:50,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 195 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 767.3333333333334) internal successors, (2302), 3 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:50,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:50,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 765 of 1738 [2023-08-04 02:09:50,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand