/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:08:54,638 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:08:54,678 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:08:54,681 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:08:54,681 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:08:54,681 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:08:54,681 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:08:54,693 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:08:54,694 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:08:54,694 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:08:54,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:08:54,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:08:54,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:08:54,695 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:08:54,695 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:08:54,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:08:54,696 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:08:54,696 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:08:54,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:08:54,696 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:08:54,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:08:54,700 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:08:54,700 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:08:54,700 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:08:54,700 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:08:54,701 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:08:54,701 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:08:54,701 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:08:54,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:08:54,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:08:54,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:08:54,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:08:54,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:08:54,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:08:54,702 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:08:54,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:08:54,703 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:08:54,703 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:08:54,703 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:08:54,703 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:08:54,703 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:08:54,704 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 21:08:54,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:08:54,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:08:54,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:08:54,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:08:54,894 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:08:54,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy1.wvr_bound2.c [2023-08-03 21:08:55,794 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:08:55,959 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:08:55,959 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy1.wvr_bound2.c [2023-08-03 21:08:55,964 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9193ea4b0/d1b2d74d04f2474fbdbe5dcf03a2d8b1/FLAG1010491f2 [2023-08-03 21:08:55,972 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9193ea4b0/d1b2d74d04f2474fbdbe5dcf03a2d8b1 [2023-08-03 21:08:55,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:08:55,975 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:08:55,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:08:55,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:08:55,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:08:55,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:08:55" (1/1) ... [2023-08-03 21:08:55,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1517da9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:55, skipping insertion in model container [2023-08-03 21:08:55,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:08:55" (1/1) ... [2023-08-03 21:08:55,996 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:08:56,089 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_test-easy1.wvr_bound2.c[2038,2051] [2023-08-03 21:08:56,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:08:56,095 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:08:56,107 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_test-easy1.wvr_bound2.c[2038,2051] [2023-08-03 21:08:56,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:08:56,116 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:08:56,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56 WrapperNode [2023-08-03 21:08:56,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:08:56,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:08:56,118 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:08:56,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:08:56,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,128 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,141 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 90 [2023-08-03 21:08:56,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:08:56,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:08:56,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:08:56,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:08:56,146 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,148 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,151 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,153 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,154 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:08:56,156 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:08:56,156 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:08:56,156 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:08:56,157 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (1/1) ... [2023-08-03 21:08:56,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:08:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:08:56,178 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) [2023-08-03 21:08:56,180 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 [2023-08-03 21:08:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:08:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 21:08:56,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 21:08:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 21:08:56,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 21:08:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:08:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:08:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:08:56,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:08:56,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:08:56,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:08:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:08:56,213 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:08:56,274 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:08:56,275 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:08:56,415 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:08:56,420 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:08:56,420 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 21:08:56,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:08:56 BoogieIcfgContainer [2023-08-03 21:08:56,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:08:56,423 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:08:56,423 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:08:56,425 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:08:56,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:08:55" (1/3) ... [2023-08-03 21:08:56,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fe0452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:08:56, skipping insertion in model container [2023-08-03 21:08:56,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:08:56" (2/3) ... [2023-08-03 21:08:56,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fe0452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:08:56, skipping insertion in model container [2023-08-03 21:08:56,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:08:56" (3/3) ... [2023-08-03 21:08:56,426 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_test-easy1.wvr_bound2.c [2023-08-03 21:08:56,431 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:08:56,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:08:56,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:08:56,437 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:08:56,472 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 21:08:56,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 240 flow [2023-08-03 21:08:56,547 INFO L124 PetriNetUnfolderBase]: 33/247 cut-off events. [2023-08-03 21:08:56,547 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:08:56,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 33/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 780 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-03 21:08:56,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 109 transitions, 240 flow [2023-08-03 21:08:56,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 240 flow [2023-08-03 21:08:56,558 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:08:56,564 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 240 flow [2023-08-03 21:08:56,566 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 240 flow [2023-08-03 21:08:56,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 240 flow [2023-08-03 21:08:56,614 INFO L124 PetriNetUnfolderBase]: 33/247 cut-off events. [2023-08-03 21:08:56,614 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:08:56,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 33/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 780 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-03 21:08:56,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 1888 [2023-08-03 21:08:58,135 INFO L134 LiptonReduction]: Checked pairs total: 2352 [2023-08-03 21:08:58,136 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-03 21:08:58,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:08:58,151 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;@635c3f9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:08:58,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:08:58,153 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:08:58,154 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-03 21:08:58,154 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:08:58,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:08:58,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:08:58,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:08:58,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:08:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash 397513386, now seen corresponding path program 1 times [2023-08-03 21:08:58,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:08:58,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747693637] [2023-08-03 21:08:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:08:58,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:08:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:08:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:08:58,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:08:58,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747693637] [2023-08-03 21:08:58,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747693637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:08:58,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:08:58,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:08:58,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119702152] [2023-08-03 21:08:58,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:08:58,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:08:58,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:08:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:08:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:08:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 202 [2023-08-03 21:08:58,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:08:58,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:08:58,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 202 [2023-08-03 21:08:58,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:08:58,380 INFO L124 PetriNetUnfolderBase]: 108/203 cut-off events. [2023-08-03 21:08:58,380 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-03 21:08:58,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 203 events. 108/203 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 584 event pairs, 21 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 308. Up to 183 conditions per place. [2023-08-03 21:08:58,385 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 24 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-03 21:08:58,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 30 transitions, 134 flow [2023-08-03 21:08:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:08:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:08:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-03 21:08:58,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49174917491749176 [2023-08-03 21:08:58,400 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-03 21:08:58,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-03 21:08:58,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:08:58,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-03 21:08:58,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:08:58,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:08:58,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:08:58,413 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 78 flow. Second operand 3 states and 298 transitions. [2023-08-03 21:08:58,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 30 transitions, 134 flow [2023-08-03 21:08:58,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:08:58,418 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 84 flow [2023-08-03 21:08:58,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-08-03 21:08:58,422 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-03 21:08:58,423 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 84 flow [2023-08-03 21:08:58,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:08:58,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:08:58,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:08:58,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:08:58,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:08:58,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:08:58,426 INFO L85 PathProgramCache]: Analyzing trace with hash -545011280, now seen corresponding path program 1 times [2023-08-03 21:08:58,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:08:58,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29762533] [2023-08-03 21:08:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:08:58,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:08:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:08:58,455 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:08:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:08:58,479 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:08:58,480 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:08:58,481 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 21:08:58,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:08:58,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 21:08:58,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 21:08:58,482 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 21:08:58,484 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:08:58,484 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:08:58,501 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 21:08:58,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 131 transitions, 310 flow [2023-08-03 21:08:58,562 INFO L124 PetriNetUnfolderBase]: 134/812 cut-off events. [2023-08-03 21:08:58,562 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 21:08:58,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 812 events. 134/812 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4031 event pairs, 1 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 479. Up to 32 conditions per place. [2023-08-03 21:08:58,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 131 transitions, 310 flow [2023-08-03 21:08:58,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 131 transitions, 310 flow [2023-08-03 21:08:58,567 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:08:58,567 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 131 transitions, 310 flow [2023-08-03 21:08:58,567 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 131 transitions, 310 flow [2023-08-03 21:08:58,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 131 transitions, 310 flow [2023-08-03 21:08:58,609 INFO L124 PetriNetUnfolderBase]: 134/812 cut-off events. [2023-08-03 21:08:58,609 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 21:08:58,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 812 events. 134/812 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4031 event pairs, 1 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 479. Up to 32 conditions per place. [2023-08-03 21:08:58,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 4608 [2023-08-03 21:09:00,239 INFO L134 LiptonReduction]: Checked pairs total: 13728 [2023-08-03 21:09:00,239 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-03 21:09:00,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:09:00,241 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;@635c3f9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:09:00,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:09:00,243 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:09:00,243 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 21:09:00,243 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:09:00,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:00,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:09:00,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:00,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash 634239585, now seen corresponding path program 1 times [2023-08-03 21:09:00,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:00,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892177089] [2023-08-03 21:09:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:00,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:09:00,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:00,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892177089] [2023-08-03 21:09:00,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892177089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:00,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:09:00,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:09:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196655045] [2023-08-03 21:09:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:00,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:09:00,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2023-08-03 21:09:00,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:00,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2023-08-03 21:09:00,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:00,455 INFO L124 PetriNetUnfolderBase]: 1950/2814 cut-off events. [2023-08-03 21:09:00,455 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-08-03 21:09:00,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 2814 events. 1950/2814 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10837 event pairs, 641 based on Foata normal form. 0/2582 useless extension candidates. Maximal degree in co-relation 2142. Up to 2621 conditions per place. [2023-08-03 21:09:00,467 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 35 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-03 21:09:00,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 224 flow [2023-08-03 21:09:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-03 21:09:00,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2023-08-03 21:09:00,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-03 21:09:00,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-03 21:09:00,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:00,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-03 21:09:00,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 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) [2023-08-03 21:09:00,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,472 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 144 flow. Second operand 3 states and 351 transitions. [2023-08-03 21:09:00,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 224 flow [2023-08-03 21:09:00,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:09:00,474 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 154 flow [2023-08-03 21:09:00,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-03 21:09:00,475 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-03 21:09:00,475 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 154 flow [2023-08-03 21:09:00,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:00,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:00,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:09:00,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:00,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1630043166, now seen corresponding path program 1 times [2023-08-03 21:09:00,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:00,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914997489] [2023-08-03 21:09:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:09:00,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:00,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914997489] [2023-08-03 21:09:00,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914997489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:00,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497830823] [2023-08-03 21:09:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:00,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:00,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:00,526 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) [2023-08-03 21:09:00,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:09:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:00,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:09:00,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:09:00,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:09:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497830823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:00,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:09:00,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 21:09:00,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907553867] [2023-08-03 21:09:00,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:00,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:00,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:00,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:00,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:09:00,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2023-08-03 21:09:00,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:00,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2023-08-03 21:09:00,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:00,756 INFO L124 PetriNetUnfolderBase]: 1944/2826 cut-off events. [2023-08-03 21:09:00,756 INFO L125 PetriNetUnfolderBase]: For 319/319 co-relation queries the response was YES. [2023-08-03 21:09:00,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 2826 events. 1944/2826 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 11026 event pairs, 644 based on Foata normal form. 0/2613 useless extension candidates. Maximal degree in co-relation 5738. Up to 2550 conditions per place. [2023-08-03 21:09:00,768 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 40 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-03 21:09:00,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 254 flow [2023-08-03 21:09:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-03 21:09:00,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2023-08-03 21:09:00,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-03 21:09:00,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-03 21:09:00,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:00,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-03 21:09:00,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,772 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 154 flow. Second operand 3 states and 354 transitions. [2023-08-03 21:09:00,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 254 flow [2023-08-03 21:09:00,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:09:00,774 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 164 flow [2023-08-03 21:09:00,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-03 21:09:00,774 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-03 21:09:00,775 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 164 flow [2023-08-03 21:09:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:00,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:00,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:09:00,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 21:09:00,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:00,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:00,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash -848069016, now seen corresponding path program 1 times [2023-08-03 21:09:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:00,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118340625] [2023-08-03 21:09:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:00,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:09:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:01,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118340625] [2023-08-03 21:09:01,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118340625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:01,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812433267] [2023-08-03 21:09:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:01,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:01,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:01,053 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) [2023-08-03 21:09:01,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:09:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:01,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:09:01,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:09:01,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:09:01,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812433267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:01,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:09:01,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:09:01,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404572033] [2023-08-03 21:09:01,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:01,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:09:01,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:01,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:09:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:09:01,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-03 21:09:01,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:01,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-03 21:09:01,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:01,351 INFO L124 PetriNetUnfolderBase]: 1936/2812 cut-off events. [2023-08-03 21:09:01,351 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-03 21:09:01,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5827 conditions, 2812 events. 1936/2812 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10922 event pairs, 427 based on Foata normal form. 4/2636 useless extension candidates. Maximal degree in co-relation 2175. Up to 2584 conditions per place. [2023-08-03 21:09:01,363 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 39 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-03 21:09:01,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 265 flow [2023-08-03 21:09:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:09:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:09:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-08-03 21:09:01,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48947368421052634 [2023-08-03 21:09:01,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-08-03 21:09:01,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-08-03 21:09:01,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:01,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-08-03 21:09:01,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,368 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,369 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 164 flow. Second operand 5 states and 558 transitions. [2023-08-03 21:09:01,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 265 flow [2023-08-03 21:09:01,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 256 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 21:09:01,371 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 173 flow [2023-08-03 21:09:01,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-08-03 21:09:01,371 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2023-08-03 21:09:01,371 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 173 flow [2023-08-03 21:09:01,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:01,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:01,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:01,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:01,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1034869811, now seen corresponding path program 1 times [2023-08-03 21:09:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:01,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356442136] [2023-08-03 21:09:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:09:01,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:01,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356442136] [2023-08-03 21:09:01,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356442136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626487084] [2023-08-03 21:09:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:01,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:01,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:01,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:01,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:09:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:01,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:09:01,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:09:01,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:09:01,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626487084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:01,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:09:01,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 21:09:01,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382104710] [2023-08-03 21:09:01,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:01,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:01,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:09:01,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2023-08-03 21:09:01,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:01,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2023-08-03 21:09:01,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:01,842 INFO L124 PetriNetUnfolderBase]: 1780/2632 cut-off events. [2023-08-03 21:09:01,843 INFO L125 PetriNetUnfolderBase]: For 313/313 co-relation queries the response was YES. [2023-08-03 21:09:01,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2632 events. 1780/2632 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10283 event pairs, 616 based on Foata normal form. 0/2481 useless extension candidates. Maximal degree in co-relation 2332. Up to 1924 conditions per place. [2023-08-03 21:09:01,855 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 48 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-03 21:09:01,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 311 flow [2023-08-03 21:09:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-03 21:09:01,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-08-03 21:09:01,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-03 21:09:01,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-03 21:09:01,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:01,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-03 21:09:01,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,858 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 173 flow. Second operand 3 states and 360 transitions. [2023-08-03 21:09:01,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 311 flow [2023-08-03 21:09:01,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 304 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:09:01,861 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 178 flow [2023-08-03 21:09:01,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-03 21:09:01,863 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2023-08-03 21:09:01,863 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 178 flow [2023-08-03 21:09:01,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:01,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:01,864 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:01,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 21:09:02,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:02,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:02,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash 491489815, now seen corresponding path program 1 times [2023-08-03 21:09:02,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:02,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815164774] [2023-08-03 21:09:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:02,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:09:02,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:02,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815164774] [2023-08-03 21:09:02,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815164774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:02,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968097383] [2023-08-03 21:09:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:02,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:02,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:02,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:02,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:09:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:02,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:09:02,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:09:02,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:09:02,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968097383] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:09:02,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:09:02,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:09:02,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154818570] [2023-08-03 21:09:02,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:09:02,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:09:02,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:09:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:09:02,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-03 21:09:02,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:02,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-03 21:09:02,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:02,325 INFO L124 PetriNetUnfolderBase]: 1586/2328 cut-off events. [2023-08-03 21:09:02,325 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-08-03 21:09:02,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 2328 events. 1586/2328 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8606 event pairs, 370 based on Foata normal form. 2/2253 useless extension candidates. Maximal degree in co-relation 2127. Up to 2143 conditions per place. [2023-08-03 21:09:02,333 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 40 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-03 21:09:02,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 272 flow [2023-08-03 21:09:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:09:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:09:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-08-03 21:09:02,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49780701754385964 [2023-08-03 21:09:02,335 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-08-03 21:09:02,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-08-03 21:09:02,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:02,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-08-03 21:09:02,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,338 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,338 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 178 flow. Second operand 4 states and 454 transitions. [2023-08-03 21:09:02,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 272 flow [2023-08-03 21:09:02,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:09:02,340 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 174 flow [2023-08-03 21:09:02,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-03 21:09:02,341 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2023-08-03 21:09:02,341 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 174 flow [2023-08-03 21:09:02,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:02,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:02,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 21:09:02,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:02,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:02,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:02,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1553790503, now seen corresponding path program 1 times [2023-08-03 21:09:02,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:02,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068457388] [2023-08-03 21:09:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:02,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:09:02,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068457388] [2023-08-03 21:09:02,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068457388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495600508] [2023-08-03 21:09:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:02,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:02,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:02,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:09:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:02,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:09:02,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:09:02,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:09:02,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495600508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:02,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:09:02,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:09:02,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679301690] [2023-08-03 21:09:02,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:02,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:09:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:09:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:09:02,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-03 21:09:02,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:02,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-03 21:09:02,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:02,807 INFO L124 PetriNetUnfolderBase]: 1522/2240 cut-off events. [2023-08-03 21:09:02,808 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2023-08-03 21:09:02,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 2240 events. 1522/2240 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8227 event pairs, 44 based on Foata normal form. 16/2188 useless extension candidates. Maximal degree in co-relation 2690. Up to 1862 conditions per place. [2023-08-03 21:09:02,816 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 52 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-08-03 21:09:02,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 324 flow [2023-08-03 21:09:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:09:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:09:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-08-03 21:09:02,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-03 21:09:02,817 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-08-03 21:09:02,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-08-03 21:09:02,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:02,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-08-03 21:09:02,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,820 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 174 flow. Second operand 5 states and 570 transitions. [2023-08-03 21:09:02,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 324 flow [2023-08-03 21:09:02,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 312 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 21:09:02,823 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 179 flow [2023-08-03 21:09:02,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-03 21:09:02,824 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2023-08-03 21:09:02,824 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 179 flow [2023-08-03 21:09:02,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:02,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:02,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:02,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:03,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:03,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:03,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash -488091929, now seen corresponding path program 1 times [2023-08-03 21:09:03,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:03,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460874026] [2023-08-03 21:09:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:03,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 21:09:03,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460874026] [2023-08-03 21:09:03,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460874026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799346852] [2023-08-03 21:09:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:03,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:03,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:03,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 21:09:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:03,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:09:03,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:09:03,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:09:03,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799346852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:03,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:09:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 21:09:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849844356] [2023-08-03 21:09:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:03,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:03,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:09:03,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2023-08-03 21:09:03,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:03,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2023-08-03 21:09:03,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:03,271 INFO L124 PetriNetUnfolderBase]: 1541/2311 cut-off events. [2023-08-03 21:09:03,271 INFO L125 PetriNetUnfolderBase]: For 481/481 co-relation queries the response was YES. [2023-08-03 21:09:03,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4944 conditions, 2311 events. 1541/2311 cut-off events. For 481/481 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8777 event pairs, 556 based on Foata normal form. 0/2263 useless extension candidates. Maximal degree in co-relation 2857. Up to 1582 conditions per place. [2023-08-03 21:09:03,282 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 49 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-03 21:09:03,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 317 flow [2023-08-03 21:09:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-03 21:09:03,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-08-03 21:09:03,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-03 21:09:03,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-03 21:09:03,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:03,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-03 21:09:03,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,285 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 179 flow. Second operand 3 states and 360 transitions. [2023-08-03 21:09:03,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 317 flow [2023-08-03 21:09:03,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:09:03,287 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 184 flow [2023-08-03 21:09:03,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-03 21:09:03,287 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-03 21:09:03,287 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 184 flow [2023-08-03 21:09:03,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:03,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:03,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:03,494 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:03,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash -344007621, now seen corresponding path program 1 times [2023-08-03 21:09:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:03,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945631742] [2023-08-03 21:09:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:03,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:09:03,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945631742] [2023-08-03 21:09:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945631742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391059376] [2023-08-03 21:09:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:03,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:03,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:03,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:03,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 21:09:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:03,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:09:03,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:09:03,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 21:09:03,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391059376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:09:03,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:09:03,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:09:03,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976230862] [2023-08-03 21:09:03,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:09:03,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:09:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:09:03,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:09:03,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-03 21:09:03,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:03,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-03 21:09:03,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:03,730 INFO L124 PetriNetUnfolderBase]: 1457/2187 cut-off events. [2023-08-03 21:09:03,730 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2023-08-03 21:09:03,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4810 conditions, 2187 events. 1457/2187 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7942 event pairs, 356 based on Foata normal form. 8/2192 useless extension candidates. Maximal degree in co-relation 2837. Up to 1848 conditions per place. [2023-08-03 21:09:03,738 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 49 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-03 21:09:03,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 64 transitions, 312 flow [2023-08-03 21:09:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:09:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:09:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 462 transitions. [2023-08-03 21:09:03,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2023-08-03 21:09:03,739 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 462 transitions. [2023-08-03 21:09:03,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 462 transitions. [2023-08-03 21:09:03,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:03,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 462 transitions. [2023-08-03 21:09:03,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,742 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,742 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 184 flow. Second operand 4 states and 462 transitions. [2023-08-03 21:09:03,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 64 transitions, 312 flow [2023-08-03 21:09:03,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:09:03,745 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 180 flow [2023-08-03 21:09:03,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-03 21:09:03,746 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2023-08-03 21:09:03,746 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 180 flow [2023-08-03 21:09:03,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:03,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:03,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:03,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 21:09:03,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:03,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:03,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash -316379767, now seen corresponding path program 1 times [2023-08-03 21:09:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:03,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938467383] [2023-08-03 21:09:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:03,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:09:03,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938467383] [2023-08-03 21:09:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938467383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173889457] [2023-08-03 21:09:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:03,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:03,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:03,995 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:03,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 21:09:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:04,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:09:04,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:09:04,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:09:04,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173889457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:09:04,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:09:04,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:09:04,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788995788] [2023-08-03 21:09:04,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:09:04,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:09:04,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:09:04,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:09:04,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-03 21:09:04,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:04,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-03 21:09:04,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:04,186 INFO L124 PetriNetUnfolderBase]: 1017/1547 cut-off events. [2023-08-03 21:09:04,186 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-08-03 21:09:04,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3401 conditions, 1547 events. 1017/1547 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5063 event pairs, 215 based on Foata normal form. 32/1564 useless extension candidates. Maximal degree in co-relation 2737. Up to 663 conditions per place. [2023-08-03 21:09:04,191 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 55 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-03 21:09:04,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 350 flow [2023-08-03 21:09:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:09:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:09:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-03 21:09:04,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142543859649122 [2023-08-03 21:09:04,193 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-03 21:09:04,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-03 21:09:04,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:04,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-03 21:09:04,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,196 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,196 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 180 flow. Second operand 4 states and 469 transitions. [2023-08-03 21:09:04,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 350 flow [2023-08-03 21:09:04,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 344 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 21:09:04,198 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 194 flow [2023-08-03 21:09:04,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-08-03 21:09:04,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2023-08-03 21:09:04,199 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 194 flow [2023-08-03 21:09:04,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:04,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:04,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:04,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 21:09:04,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:04,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:04,405 INFO L85 PathProgramCache]: Analyzing trace with hash 187770292, now seen corresponding path program 1 times [2023-08-03 21:09:04,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:04,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298109248] [2023-08-03 21:09:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:04,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:04,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:04,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298109248] [2023-08-03 21:09:04,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298109248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:04,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504315543] [2023-08-03 21:09:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:04,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:04,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:04,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:04,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 21:09:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:04,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:09:04,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:04,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:04,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504315543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:09:04,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:09:04,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:09:04,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728289695] [2023-08-03 21:09:04,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:09:04,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:09:04,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:09:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:09:04,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-03 21:09:04,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:04,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-03 21:09:04,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:04,656 INFO L124 PetriNetUnfolderBase]: 1009/1532 cut-off events. [2023-08-03 21:09:04,657 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-03 21:09:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3613 conditions, 1532 events. 1009/1532 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4977 event pairs, 439 based on Foata normal form. 9/1526 useless extension candidates. Maximal degree in co-relation 2953. Up to 1160 conditions per place. [2023-08-03 21:09:04,664 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 55 selfloop transitions, 3 changer transitions 2/72 dead transitions. [2023-08-03 21:09:04,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 366 flow [2023-08-03 21:09:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:09:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:09:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-03 21:09:04,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142543859649122 [2023-08-03 21:09:04,665 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-03 21:09:04,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-03 21:09:04,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:04,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-03 21:09:04,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,668 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,668 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 194 flow. Second operand 4 states and 469 transitions. [2023-08-03 21:09:04,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 366 flow [2023-08-03 21:09:04,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:09:04,670 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 198 flow [2023-08-03 21:09:04,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2023-08-03 21:09:04,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2023-08-03 21:09:04,671 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 198 flow [2023-08-03 21:09:04,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:04,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:04,672 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:04,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:04,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:04,877 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:04,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:04,877 INFO L85 PathProgramCache]: Analyzing trace with hash 258542565, now seen corresponding path program 1 times [2023-08-03 21:09:04,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:04,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837490180] [2023-08-03 21:09:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 21:09:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:05,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837490180] [2023-08-03 21:09:05,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837490180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:05,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:09:05,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 21:09:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194932728] [2023-08-03 21:09:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:05,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:05,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:09:05,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2023-08-03 21:09:05,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:05,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2023-08-03 21:09:05,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:05,190 INFO L124 PetriNetUnfolderBase]: 1795/2827 cut-off events. [2023-08-03 21:09:05,190 INFO L125 PetriNetUnfolderBase]: For 1426/1426 co-relation queries the response was YES. [2023-08-03 21:09:05,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6429 conditions, 2827 events. 1795/2827 cut-off events. For 1426/1426 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 13409 event pairs, 445 based on Foata normal form. 1/2813 useless extension candidates. Maximal degree in co-relation 6197. Up to 1662 conditions per place. [2023-08-03 21:09:05,199 INFO L140 encePairwiseOnDemand]: 222/228 looper letters, 65 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2023-08-03 21:09:05,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 499 flow [2023-08-03 21:09:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-03 21:09:05,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321637426900585 [2023-08-03 21:09:05,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-03 21:09:05,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-03 21:09:05,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:05,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-03 21:09:05,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,202 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 198 flow. Second operand 3 states and 364 transitions. [2023-08-03 21:09:05,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 499 flow [2023-08-03 21:09:05,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 483 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 21:09:05,207 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 223 flow [2023-08-03 21:09:05,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2023-08-03 21:09:05,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2023-08-03 21:09:05,207 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 223 flow [2023-08-03 21:09:05,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:05,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:05,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 21:09:05,208 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:05,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1406768981, now seen corresponding path program 1 times [2023-08-03 21:09:05,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:05,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638866917] [2023-08-03 21:09:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:09:05,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:05,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638866917] [2023-08-03 21:09:05,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638866917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:05,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:09:05,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:09:05,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880989304] [2023-08-03 21:09:05,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:05,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:05,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:05,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:05,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:09:05,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2023-08-03 21:09:05,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:05,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2023-08-03 21:09:05,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:05,530 INFO L124 PetriNetUnfolderBase]: 3937/5799 cut-off events. [2023-08-03 21:09:05,530 INFO L125 PetriNetUnfolderBase]: For 4083/4083 co-relation queries the response was YES. [2023-08-03 21:09:05,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15985 conditions, 5799 events. 3937/5799 cut-off events. For 4083/4083 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 29024 event pairs, 1042 based on Foata normal form. 0/5247 useless extension candidates. Maximal degree in co-relation 15652. Up to 2779 conditions per place. [2023-08-03 21:09:05,557 INFO L140 encePairwiseOnDemand]: 222/228 looper letters, 74 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-08-03 21:09:05,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 557 flow [2023-08-03 21:09:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-03 21:09:05,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365497076023392 [2023-08-03 21:09:05,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-03 21:09:05,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-03 21:09:05,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:05,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-03 21:09:05,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,561 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 223 flow. Second operand 3 states and 367 transitions. [2023-08-03 21:09:05,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 557 flow [2023-08-03 21:09:05,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:09:05,572 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 278 flow [2023-08-03 21:09:05,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-03 21:09:05,573 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2023-08-03 21:09:05,573 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 278 flow [2023-08-03 21:09:05,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:05,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:05,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 21:09:05,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:05,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:05,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1917322911, now seen corresponding path program 1 times [2023-08-03 21:09:05,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:05,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685992930] [2023-08-03 21:09:05,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:05,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 21:09:05,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:05,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685992930] [2023-08-03 21:09:05,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685992930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:05,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781129099] [2023-08-03 21:09:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:05,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:05,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:05,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:05,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 21:09:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:05,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 21:09:05,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 21:09:05,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 21:09:05,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781129099] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:05,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 21:09:05,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-08-03 21:09:05,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278649784] [2023-08-03 21:09:05,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:05,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:09:05,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:05,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:09:05,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:09:05,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-03 21:09:05,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:05,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:05,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-03 21:09:05,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:06,800 INFO L124 PetriNetUnfolderBase]: 11301/17555 cut-off events. [2023-08-03 21:09:06,800 INFO L125 PetriNetUnfolderBase]: For 23688/23856 co-relation queries the response was YES. [2023-08-03 21:09:06,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52644 conditions, 17555 events. 11301/17555 cut-off events. For 23688/23856 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 114883 event pairs, 1959 based on Foata normal form. 0/16246 useless extension candidates. Maximal degree in co-relation 51838. Up to 7713 conditions per place. [2023-08-03 21:09:06,977 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 108 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2023-08-03 21:09:06,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 135 transitions, 912 flow [2023-08-03 21:09:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:09:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:09:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-03 21:09:06,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153508771929824 [2023-08-03 21:09:06,979 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-03 21:09:06,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-03 21:09:06,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:06,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-03 21:09:06,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 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) [2023-08-03 21:09:06,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:06,981 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:06,981 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 278 flow. Second operand 4 states and 470 transitions. [2023-08-03 21:09:06,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 135 transitions, 912 flow [2023-08-03 21:09:07,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 135 transitions, 884 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:09:07,087 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 430 flow [2023-08-03 21:09:07,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2023-08-03 21:09:07,087 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2023-08-03 21:09:07,087 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 430 flow [2023-08-03 21:09:07,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:07,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:07,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:07,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 21:09:07,292 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:07,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1214649840, now seen corresponding path program 1 times [2023-08-03 21:09:07,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:07,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613292452] [2023-08-03 21:09:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:09:07,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:07,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613292452] [2023-08-03 21:09:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613292452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:07,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:09:07,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:09:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915750363] [2023-08-03 21:09:07,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:07,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:09:07,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2023-08-03 21:09:07,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:07,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:07,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2023-08-03 21:09:07,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:08,276 INFO L124 PetriNetUnfolderBase]: 9941/15098 cut-off events. [2023-08-03 21:09:08,276 INFO L125 PetriNetUnfolderBase]: For 40926/44298 co-relation queries the response was YES. [2023-08-03 21:09:08,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56225 conditions, 15098 events. 9941/15098 cut-off events. For 40926/44298 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 93319 event pairs, 2183 based on Foata normal form. 888/15292 useless extension candidates. Maximal degree in co-relation 55391. Up to 7014 conditions per place. [2023-08-03 21:09:08,355 INFO L140 encePairwiseOnDemand]: 222/228 looper letters, 100 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-08-03 21:09:08,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 118 transitions, 902 flow [2023-08-03 21:09:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-03 21:09:08,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292397660818714 [2023-08-03 21:09:08,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-03 21:09:08,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-03 21:09:08,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:08,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-03 21:09:08,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:08,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:08,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:08,358 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 430 flow. Second operand 3 states and 362 transitions. [2023-08-03 21:09:08,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 118 transitions, 902 flow [2023-08-03 21:09:08,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 118 transitions, 902 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:09:08,410 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 514 flow [2023-08-03 21:09:08,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-08-03 21:09:08,411 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2023-08-03 21:09:08,411 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 514 flow [2023-08-03 21:09:08,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:08,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:08,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:08,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 21:09:08,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:08,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash -108364983, now seen corresponding path program 1 times [2023-08-03 21:09:08,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:08,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463173538] [2023-08-03 21:09:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:08,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 21:09:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:08,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463173538] [2023-08-03 21:09:08,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463173538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:09:08,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:09:08,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:09:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576983568] [2023-08-03 21:09:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:08,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:09:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:09:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:09:08,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2023-08-03 21:09:08,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 514 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:08,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:08,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2023-08-03 21:09:08,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:09,577 INFO L124 PetriNetUnfolderBase]: 9834/16189 cut-off events. [2023-08-03 21:09:09,577 INFO L125 PetriNetUnfolderBase]: For 53584/54795 co-relation queries the response was YES. [2023-08-03 21:09:09,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63465 conditions, 16189 events. 9834/16189 cut-off events. For 53584/54795 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 113545 event pairs, 3176 based on Foata normal form. 468/16291 useless extension candidates. Maximal degree in co-relation 62561. Up to 10767 conditions per place. [2023-08-03 21:09:09,669 INFO L140 encePairwiseOnDemand]: 222/228 looper letters, 98 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2023-08-03 21:09:09,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 964 flow [2023-08-03 21:09:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:09:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:09:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-03 21:09:09,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365497076023392 [2023-08-03 21:09:09,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-03 21:09:09,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-03 21:09:09,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:09,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-03 21:09:09,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:09,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:09,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:09,672 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 514 flow. Second operand 3 states and 367 transitions. [2023-08-03 21:09:09,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 964 flow [2023-08-03 21:09:09,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 944 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:09:09,746 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 562 flow [2023-08-03 21:09:09,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=562, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2023-08-03 21:09:09,747 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2023-08-03 21:09:09,747 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 562 flow [2023-08-03 21:09:09,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:09,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:09,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:09,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 21:09:09,748 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:09,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1149730819, now seen corresponding path program 1 times [2023-08-03 21:09:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336298022] [2023-08-03 21:09:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:09,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:09,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336298022] [2023-08-03 21:09:09,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336298022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:09,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114960245] [2023-08-03 21:09:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:09,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:09,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:09,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:09,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 21:09:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:09,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 21:09:09,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:10,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:10,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114960245] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:10,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 21:09:10,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-08-03 21:09:10,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381345978] [2023-08-03 21:09:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:10,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:09:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:09:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:09:10,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-03 21:09:10,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 562 flow. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:10,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:10,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-03 21:09:10,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:11,213 INFO L124 PetriNetUnfolderBase]: 11631/17275 cut-off events. [2023-08-03 21:09:11,213 INFO L125 PetriNetUnfolderBase]: For 64917/64981 co-relation queries the response was YES. [2023-08-03 21:09:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75694 conditions, 17275 events. 11631/17275 cut-off events. For 64917/64981 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 100287 event pairs, 1874 based on Foata normal form. 62/17315 useless extension candidates. Maximal degree in co-relation 74970. Up to 7862 conditions per place. [2023-08-03 21:09:11,293 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 127 selfloop transitions, 25 changer transitions 4/164 dead transitions. [2023-08-03 21:09:11,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 164 transitions, 1388 flow [2023-08-03 21:09:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:09:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:09:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2023-08-03 21:09:11,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2023-08-03 21:09:11,294 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2023-08-03 21:09:11,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2023-08-03 21:09:11,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:11,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2023-08-03 21:09:11,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:11,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:11,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:11,297 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 562 flow. Second operand 4 states and 468 transitions. [2023-08-03 21:09:11,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 164 transitions, 1388 flow [2023-08-03 21:09:11,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 164 transitions, 1316 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-03 21:09:11,362 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 754 flow [2023-08-03 21:09:11,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=754, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2023-08-03 21:09:11,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2023-08-03 21:09:11,362 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 754 flow [2023-08-03 21:09:11,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:11,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:11,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:11,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:11,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-03 21:09:11,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:11,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash -469208314, now seen corresponding path program 2 times [2023-08-03 21:09:11,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:11,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052313768] [2023-08-03 21:09:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:11,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:11,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:11,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052313768] [2023-08-03 21:09:11,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052313768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:11,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290217166] [2023-08-03 21:09:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:09:11,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:11,644 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:11,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 21:09:11,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:09:11,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:09:11,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 21:09:11,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:11,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290217166] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:11,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 21:09:11,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-08-03 21:09:11,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160073989] [2023-08-03 21:09:11,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:11,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:09:11,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:09:11,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:09:11,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-03 21:09:11,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 754 flow. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:11,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:11,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-03 21:09:11,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:13,523 INFO L124 PetriNetUnfolderBase]: 14604/22323 cut-off events. [2023-08-03 21:09:13,523 INFO L125 PetriNetUnfolderBase]: For 106360/106390 co-relation queries the response was YES. [2023-08-03 21:09:13,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103303 conditions, 22323 events. 14604/22323 cut-off events. For 106360/106390 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 142507 event pairs, 2287 based on Foata normal form. 666/22970 useless extension candidates. Maximal degree in co-relation 102087. Up to 9447 conditions per place. [2023-08-03 21:09:13,633 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 160 selfloop transitions, 29 changer transitions 2/199 dead transitions. [2023-08-03 21:09:13,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 199 transitions, 1854 flow [2023-08-03 21:09:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:09:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:09:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-03 21:09:13,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-03 21:09:13,635 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-03 21:09:13,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-03 21:09:13,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:13,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-03 21:09:13,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:13,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:13,637 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:13,637 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 754 flow. Second operand 4 states and 475 transitions. [2023-08-03 21:09:13,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 199 transitions, 1854 flow [2023-08-03 21:09:13,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 199 transitions, 1806 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-03 21:09:13,756 INFO L231 Difference]: Finished difference. Result has 84 places, 117 transitions, 1066 flow [2023-08-03 21:09:13,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1066, PETRI_PLACES=84, PETRI_TRANSITIONS=117} [2023-08-03 21:09:13,756 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2023-08-03 21:09:13,756 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 117 transitions, 1066 flow [2023-08-03 21:09:13,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:13,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:13,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:13,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:13,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:13,961 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:13,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1397005822, now seen corresponding path program 3 times [2023-08-03 21:09:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:13,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110749157] [2023-08-03 21:09:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:09:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110749157] [2023-08-03 21:09:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110749157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098840314] [2023-08-03 21:09:14,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 21:09:14,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:14,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:14,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:14,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 21:09:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-03 21:09:14,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:09:14,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 21:09:14,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:09:14,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:09:14,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098840314] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:14,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 21:09:14,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-08-03 21:09:14,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116081641] [2023-08-03 21:09:14,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:09:14,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:09:14,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:14,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:09:14,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:09:14,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-03 21:09:14,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 117 transitions, 1066 flow. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:14,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:14,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-03 21:09:14,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:15,969 INFO L124 PetriNetUnfolderBase]: 14558/21817 cut-off events. [2023-08-03 21:09:15,970 INFO L125 PetriNetUnfolderBase]: For 151563/151563 co-relation queries the response was YES. [2023-08-03 21:09:16,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115072 conditions, 21817 events. 14558/21817 cut-off events. For 151563/151563 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 133138 event pairs, 1894 based on Foata normal form. 65/21870 useless extension candidates. Maximal degree in co-relation 113963. Up to 9114 conditions per place. [2023-08-03 21:09:16,094 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 151 selfloop transitions, 35 changer transitions 10/204 dead transitions. [2023-08-03 21:09:16,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 204 transitions, 2120 flow [2023-08-03 21:09:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:09:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:09:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2023-08-03 21:09:16,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2023-08-03 21:09:16,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2023-08-03 21:09:16,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2023-08-03 21:09:16,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:16,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2023-08-03 21:09:16,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:16,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:16,098 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:16,098 INFO L175 Difference]: Start difference. First operand has 84 places, 117 transitions, 1066 flow. Second operand 4 states and 468 transitions. [2023-08-03 21:09:16,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 204 transitions, 2120 flow [2023-08-03 21:09:16,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 204 transitions, 2080 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-08-03 21:09:16,216 INFO L231 Difference]: Finished difference. Result has 90 places, 133 transitions, 1386 flow [2023-08-03 21:09:16,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1386, PETRI_PLACES=90, PETRI_TRANSITIONS=133} [2023-08-03 21:09:16,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2023-08-03 21:09:16,217 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 133 transitions, 1386 flow [2023-08-03 21:09:16,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:16,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:16,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:16,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-03 21:09:16,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-03 21:09:16,421 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:16,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:16,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1098891274, now seen corresponding path program 1 times [2023-08-03 21:09:16,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:16,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445877352] [2023-08-03 21:09:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:16,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 21:09:16,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:16,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445877352] [2023-08-03 21:09:16,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445877352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:16,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346217404] [2023-08-03 21:09:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:16,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:16,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:16,584 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:16,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 21:09:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:16,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-03 21:09:16,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:16,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:09:17,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346217404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:09:17,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:09:17,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-03 21:09:17,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690615998] [2023-08-03 21:09:17,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:09:17,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-03 21:09:17,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:17,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-03 21:09:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-03 21:09:17,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-03 21:09:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 133 transitions, 1386 flow. Second operand has 22 states, 22 states have (on average 91.81818181818181) internal successors, (2020), 22 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:17,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-03 21:09:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:09:29,934 INFO L124 PetriNetUnfolderBase]: 84096/121086 cut-off events. [2023-08-03 21:09:29,934 INFO L125 PetriNetUnfolderBase]: For 1012820/1014209 co-relation queries the response was YES. [2023-08-03 21:09:30,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665164 conditions, 121086 events. 84096/121086 cut-off events. For 1012820/1014209 co-relation queries the response was YES. Maximal size of possible extension queue 2922. Compared 881535 event pairs, 3440 based on Foata normal form. 4515/125366 useless extension candidates. Maximal degree in co-relation 663817. Up to 33054 conditions per place. [2023-08-03 21:09:31,118 INFO L140 encePairwiseOnDemand]: 212/228 looper letters, 1318 selfloop transitions, 713 changer transitions 18/2055 dead transitions. [2023-08-03 21:09:31,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 2055 transitions, 21893 flow [2023-08-03 21:09:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-03 21:09:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-03 21:09:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 6728 transitions. [2023-08-03 21:09:31,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837503595053207 [2023-08-03 21:09:31,130 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 6728 transitions. [2023-08-03 21:09:31,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 6728 transitions. [2023-08-03 21:09:31,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:09:31,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 6728 transitions. [2023-08-03 21:09:31,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 110.29508196721312) internal successors, (6728), 61 states have internal predecessors, (6728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:31,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 228.0) internal successors, (14136), 62 states have internal predecessors, (14136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:31,155 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 228.0) internal successors, (14136), 62 states have internal predecessors, (14136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:31,155 INFO L175 Difference]: Start difference. First operand has 90 places, 133 transitions, 1386 flow. Second operand 61 states and 6728 transitions. [2023-08-03 21:09:31,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 2055 transitions, 21893 flow [2023-08-03 21:09:33,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 2055 transitions, 21693 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-03 21:09:33,984 INFO L231 Difference]: Finished difference. Result has 189 places, 846 transitions, 13652 flow [2023-08-03 21:09:33,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=13652, PETRI_PLACES=189, PETRI_TRANSITIONS=846} [2023-08-03 21:09:33,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2023-08-03 21:09:33,984 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 846 transitions, 13652 flow [2023-08-03 21:09:33,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 91.81818181818181) internal successors, (2020), 22 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:33,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:09:33,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:09:33,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-03 21:09:34,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:34,189 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:09:34,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:09:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1180285560, now seen corresponding path program 2 times [2023-08-03 21:09:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:09:34,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230162424] [2023-08-03 21:09:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:09:34,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:09:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:09:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:09:34,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:09:34,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230162424] [2023-08-03 21:09:34,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230162424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:09:34,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786834856] [2023-08-03 21:09:34,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:09:34,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:09:34,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:09:34,347 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:09:34,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-03 21:09:34,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:09:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:09:34,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-03 21:09:34,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:09:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 21:09:34,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:09:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 21:09:34,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786834856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:09:34,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:09:34,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 15 [2023-08-03 21:09:34,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093136616] [2023-08-03 21:09:34,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:09:34,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 21:09:34,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:09:34,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 21:09:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-08-03 21:09:34,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-03 21:09:34,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 846 transitions, 13652 flow. Second operand has 17 states, 17 states have (on average 93.47058823529412) internal successors, (1589), 17 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:09:34,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:09:34,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-03 21:09:34,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:10:06,272 INFO L124 PetriNetUnfolderBase]: 116399/167696 cut-off events. [2023-08-03 21:10:06,273 INFO L125 PetriNetUnfolderBase]: For 3135839/3136713 co-relation queries the response was YES. [2023-08-03 21:10:07,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1279187 conditions, 167696 events. 116399/167696 cut-off events. For 3135839/3136713 co-relation queries the response was YES. Maximal size of possible extension queue 4060. Compared 1258344 event pairs, 17865 based on Foata normal form. 1882/169361 useless extension candidates. Maximal degree in co-relation 1277463. Up to 123778 conditions per place. [2023-08-03 21:10:09,014 INFO L140 encePairwiseOnDemand]: 212/228 looper letters, 1585 selfloop transitions, 592 changer transitions 1/2184 dead transitions. [2023-08-03 21:10:09,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 2184 transitions, 36059 flow [2023-08-03 21:10:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-03 21:10:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-03 21:10:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3431 transitions. [2023-08-03 21:10:09,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702576754385965 [2023-08-03 21:10:09,019 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3431 transitions. [2023-08-03 21:10:09,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3431 transitions. [2023-08-03 21:10:09,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:10:09,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3431 transitions. [2023-08-03 21:10:09,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 107.21875) internal successors, (3431), 32 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:09,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 228.0) internal successors, (7524), 33 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:09,029 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 228.0) internal successors, (7524), 33 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:10:09,029 INFO L175 Difference]: Start difference. First operand has 189 places, 846 transitions, 13652 flow. Second operand 32 states and 3431 transitions. [2023-08-03 21:10:09,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 2184 transitions, 36059 flow [2023-08-03 21:11:41,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 2184 transitions, 33117 flow, removed 1471 selfloop flow, removed 0 redundant places. [2023-08-03 21:11:41,247 INFO L231 Difference]: Finished difference. Result has 240 places, 1447 transitions, 23928 flow [2023-08-03 21:11:41,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=11932, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=23928, PETRI_PLACES=240, PETRI_TRANSITIONS=1447} [2023-08-03 21:11:41,249 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2023-08-03 21:11:41,249 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 1447 transitions, 23928 flow [2023-08-03 21:11:41,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 93.47058823529412) internal successors, (1589), 17 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:11:41,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:11:41,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:11:41,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-03 21:11:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:11:41,454 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:11:41,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:11:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash 376597932, now seen corresponding path program 1 times [2023-08-03 21:11:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:11:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427755518] [2023-08-03 21:11:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:11:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:11:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:11:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 21:11:41,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:11:41,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427755518] [2023-08-03 21:11:41,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427755518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:11:41,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235539952] [2023-08-03 21:11:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:11:41,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:11:41,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:11:41,572 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:11:41,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-03 21:11:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:11:41,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-03 21:11:41,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:11:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 21:11:41,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:11:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 21:11:41,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235539952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:11:41,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:11:41,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-03 21:11:41,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44912310] [2023-08-03 21:11:41,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:11:41,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-03 21:11:41,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:11:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-03 21:11:41,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-08-03 21:11:42,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-03 21:11:42,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 1447 transitions, 23928 flow. Second operand has 19 states, 19 states have (on average 90.89473684210526) internal successors, (1727), 19 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:11:42,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:11:42,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-03 21:11:42,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand