/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_security.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:03:05,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:03:05,428 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:03:05,433 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:03:05,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:03:05,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:03:05,435 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:03:05,460 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:03:05,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:03:05,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:03:05,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:03:05,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:03:05,466 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:03:05,467 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:03:05,467 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:03:05,468 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:03:05,468 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:03:05,468 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:03:05,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:03:05,468 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:03:05,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:03:05,469 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:03:05,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:03:05,469 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:03:05,470 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:03:05,471 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:03:05,471 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:03:05,472 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:03:05,472 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:03:05,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:03:05,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:03:05,473 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:03:05,473 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:03:05,473 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:03:05,473 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:03:05,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:03:05,474 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:03:05,474 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:03:05,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:03:05,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:03:05,474 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:03:05,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 21:03:05,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:03:05,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:03:05,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:03:05,734 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:03:05,735 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:03:05,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_security.wvr_bound2.c [2023-08-03 21:03:06,883 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:03:07,064 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:03:07,064 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_security.wvr_bound2.c [2023-08-03 21:03:07,072 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fcf3dd7d/f5cce129bb53451e8253b1be2dce26b6/FLAGb6edc5cae [2023-08-03 21:03:07,084 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fcf3dd7d/f5cce129bb53451e8253b1be2dce26b6 [2023-08-03 21:03:07,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:03:07,089 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:03:07,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:03:07,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:03:07,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:03:07,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d8cf59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07, skipping insertion in model container [2023-08-03 21:03:07,096 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,117 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:03:07,284 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_security.wvr_bound2.c[2093,2106] [2023-08-03 21:03:07,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:03:07,295 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:03:07,330 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_security.wvr_bound2.c[2093,2106] [2023-08-03 21:03:07,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:03:07,342 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:03:07,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07 WrapperNode [2023-08-03 21:03:07,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:03:07,344 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:03:07,344 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:03:07,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:03:07,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,370 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-03 21:03:07,370 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:03:07,371 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:03:07,371 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:03:07,371 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:03:07,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,381 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,381 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,392 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:03:07,393 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:03:07,393 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:03:07,393 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:03:07,394 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (1/1) ... [2023-08-03 21:03:07,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:03:07,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:07,424 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 21:03:07,441 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 21:03:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:03:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 21:03:07,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 21:03:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 21:03:07,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 21:03:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:03:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:03:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:03:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:03:07,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:03:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:03:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:03:07,458 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 21:03:07,553 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:03:07,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:03:07,847 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:03:07,854 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:03:07,854 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 21:03:07,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:03:07 BoogieIcfgContainer [2023-08-03 21:03:07,856 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:03:07,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:03:07,858 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:03:07,860 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:03:07,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:03:07" (1/3) ... [2023-08-03 21:03:07,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322a30c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:03:07, skipping insertion in model container [2023-08-03 21:03:07,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:03:07" (2/3) ... [2023-08-03 21:03:07,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322a30c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:03:07, skipping insertion in model container [2023-08-03 21:03:07,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:03:07" (3/3) ... [2023-08-03 21:03:07,863 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_security.wvr_bound2.c [2023-08-03 21:03:07,871 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:03:07,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:03:07,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:03:07,879 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:03:07,936 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 21:03:07,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 109 transitions, 240 flow [2023-08-03 21:03:08,044 INFO L124 PetriNetUnfolderBase]: 29/250 cut-off events. [2023-08-03 21:03:08,044 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:03:08,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 250 events. 29/250 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-03 21:03:08,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 109 transitions, 240 flow [2023-08-03 21:03:08,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 109 transitions, 240 flow [2023-08-03 21:03:08,060 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:03:08,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 109 transitions, 240 flow [2023-08-03 21:03:08,071 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 109 transitions, 240 flow [2023-08-03 21:03:08,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 109 transitions, 240 flow [2023-08-03 21:03:08,143 INFO L124 PetriNetUnfolderBase]: 29/250 cut-off events. [2023-08-03 21:03:08,143 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 21:03:08,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 250 events. 29/250 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 932 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-08-03 21:03:08,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-03 21:03:10,346 INFO L134 LiptonReduction]: Checked pairs total: 2847 [2023-08-03 21:03:10,347 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-03 21:03:10,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:03:10,365 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;@ffe2204, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:03:10,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:03:10,369 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:03:10,369 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-03 21:03:10,369 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:03:10,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:10,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:03:10,370 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 21:03:10,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash 395484469, now seen corresponding path program 1 times [2023-08-03 21:03:10,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:10,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978955905] [2023-08-03 21:03:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:10,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:10,535 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 21:03:10,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978955905] [2023-08-03 21:03:10,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978955905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:03:10,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:03:10,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:03:10,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339906052] [2023-08-03 21:03:10,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:03:10,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:03:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:10,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:03:10,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:03:10,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 208 [2023-08-03 21:03:10,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:10,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:10,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 208 [2023-08-03 21:03:10,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:10,657 INFO L124 PetriNetUnfolderBase]: 57/150 cut-off events. [2023-08-03 21:03:10,657 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-03 21:03:10,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 150 events. 57/150 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 494 event pairs, 21 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 216. Up to 133 conditions per place. [2023-08-03 21:03:10,659 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 21 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-03 21:03:10,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 122 flow [2023-08-03 21:03:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:03:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:03:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-03 21:03:10,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-03 21:03:10,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-03 21:03:10,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-03 21:03:10,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:10,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-03 21:03:10,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 21:03:10,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 21:03:10,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states 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 21:03:10,701 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 74 flow. Second operand 3 states and 304 transitions. [2023-08-03 21:03:10,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 122 flow [2023-08-03 21:03:10,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:03:10,706 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 80 flow [2023-08-03 21:03:10,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-03 21:03:10,710 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-03 21:03:10,711 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 80 flow [2023-08-03 21:03:10,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:10,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:10,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:03:10,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:03:10,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:03:10,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash -605276652, now seen corresponding path program 1 times [2023-08-03 21:03:10,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:10,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790924288] [2023-08-03 21:03:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:10,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:03:10,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:03:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:03:10,758 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:03:10,759 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:03:10,760 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 21:03:10,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:03:10,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 21:03:10,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 21:03:10,763 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 21:03:10,765 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:03:10,765 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:03:10,782 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 21:03:10,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 137 transitions, 322 flow [2023-08-03 21:03:10,861 INFO L124 PetriNetUnfolderBase]: 125/830 cut-off events. [2023-08-03 21:03:10,861 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 21:03:10,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 830 events. 125/830 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4521 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-03 21:03:10,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 137 transitions, 322 flow [2023-08-03 21:03:10,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 137 transitions, 322 flow [2023-08-03 21:03:10,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:03:10,871 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 137 transitions, 322 flow [2023-08-03 21:03:10,872 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 137 transitions, 322 flow [2023-08-03 21:03:10,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 137 transitions, 322 flow [2023-08-03 21:03:10,939 INFO L124 PetriNetUnfolderBase]: 125/830 cut-off events. [2023-08-03 21:03:10,940 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 21:03:10,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 830 events. 125/830 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4521 event pairs, 1 based on Foata normal form. 0/702 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-03 21:03:10,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-03 21:03:12,756 INFO L134 LiptonReduction]: Checked pairs total: 17823 [2023-08-03 21:03:12,756 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-03 21:03:12,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:03:12,760 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;@ffe2204, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:03:12,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:03:12,762 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:03:12,762 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-03 21:03:12,762 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:03:12,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:12,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:03:12,762 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 21:03:12,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash 645696050, now seen corresponding path program 1 times [2023-08-03 21:03:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:12,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141823778] [2023-08-03 21:03:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:12,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:12,819 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 21:03:12,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141823778] [2023-08-03 21:03:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141823778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:03:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:03:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:03:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088534036] [2023-08-03 21:03:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:03:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:03:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:03:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:03:12,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-03 21:03:12,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 21:03:12,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:12,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-03 21:03:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:14,902 INFO L124 PetriNetUnfolderBase]: 17891/27130 cut-off events. [2023-08-03 21:03:14,903 INFO L125 PetriNetUnfolderBase]: For 2575/2575 co-relation queries the response was YES. [2023-08-03 21:03:14,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52001 conditions, 27130 events. 17891/27130 cut-off events. For 2575/2575 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 187091 event pairs, 10640 based on Foata normal form. 0/21326 useless extension candidates. Maximal degree in co-relation 10766. Up to 23131 conditions per place. [2023-08-03 21:03:15,163 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 44 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 21:03:15,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 258 flow [2023-08-03 21:03:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:03:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:03:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-08-03 21:03:15,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2023-08-03 21:03:15,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-08-03 21:03:15,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-08-03 21:03:15,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:15,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-08-03 21:03:15,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 21:03:15,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:03:15,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:03:15,175 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 154 flow. Second operand 3 states and 393 transitions. [2023-08-03 21:03:15,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 258 flow [2023-08-03 21:03:15,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:03:15,179 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 164 flow [2023-08-03 21:03:15,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-08-03 21:03:15,180 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-03 21:03:15,180 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 164 flow [2023-08-03 21:03:15,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 21:03:15,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:15,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:03:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:03:15,181 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 21:03:15,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:15,181 INFO L85 PathProgramCache]: Analyzing trace with hash -299248640, now seen corresponding path program 1 times [2023-08-03 21:03:15,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019795887] [2023-08-03 21:03:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:15,278 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 21:03:15,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:15,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019795887] [2023-08-03 21:03:15,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019795887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450963221] [2023-08-03 21:03:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:15,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:15,283 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 21:03:15,285 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 21:03:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:15,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:03:15,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:15,384 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 21:03:15,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:03:15,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450963221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:03:15,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:03:15,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 21:03:15,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651948198] [2023-08-03 21:03:15,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:03:15,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:03:15,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:03:15,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:03:15,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-03 21:03:15,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:15,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:15,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-03 21:03:15,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:17,121 INFO L124 PetriNetUnfolderBase]: 17711/26717 cut-off events. [2023-08-03 21:03:17,122 INFO L125 PetriNetUnfolderBase]: For 2192/2192 co-relation queries the response was YES. [2023-08-03 21:03:17,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51621 conditions, 26717 events. 17711/26717 cut-off events. For 2192/2192 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 183209 event pairs, 10999 based on Foata normal form. 0/21063 useless extension candidates. Maximal degree in co-relation 51572. Up to 22724 conditions per place. [2023-08-03 21:03:17,289 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-03 21:03:17,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 296 flow [2023-08-03 21:03:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:03:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:03:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-03 21:03:17,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669515669515669 [2023-08-03 21:03:17,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-03 21:03:17,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-03 21:03:17,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:17,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-03 21:03:17,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:17,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:03:17,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:03:17,295 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 164 flow. Second operand 3 states and 398 transitions. [2023-08-03 21:03:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 296 flow [2023-08-03 21:03:17,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:03:17,300 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 174 flow [2023-08-03 21:03:17,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-03 21:03:17,301 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-03 21:03:17,301 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 174 flow [2023-08-03 21:03:17,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:03:17,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:17,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:03:17,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 21:03:17,506 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 21:03:17,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:03:17,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash 806080073, now seen corresponding path program 1 times [2023-08-03 21:03:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269662592] [2023-08-03 21:03:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:17,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:17,600 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 21:03:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269662592] [2023-08-03 21:03:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269662592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256637569] [2023-08-03 21:03:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:17,603 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 21:03:17,605 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 21:03:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:17,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:03:17,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:17,706 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 21:03:17,706 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:03:17,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256637569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:03:17,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:03:17,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:03:17,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802433780] [2023-08-03 21:03:17,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:03:17,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:03:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:03:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:03:17,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-03 21:03:17,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 21:03:17,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:17,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-03 21:03:17,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:19,157 INFO L124 PetriNetUnfolderBase]: 17446/25965 cut-off events. [2023-08-03 21:03:19,158 INFO L125 PetriNetUnfolderBase]: For 2820/2820 co-relation queries the response was YES. [2023-08-03 21:03:19,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51925 conditions, 25965 events. 17446/25965 cut-off events. For 2820/2820 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 174039 event pairs, 7015 based on Foata normal form. 20/20685 useless extension candidates. Maximal degree in co-relation 10560. Up to 22990 conditions per place. [2023-08-03 21:03:19,412 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 52 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-08-03 21:03:19,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 315 flow [2023-08-03 21:03:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:03:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:03:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 626 transitions. [2023-08-03 21:03:19,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535042735042735 [2023-08-03 21:03:19,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 626 transitions. [2023-08-03 21:03:19,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 626 transitions. [2023-08-03 21:03:19,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:19,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 626 transitions. [2023-08-03 21:03:19,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states 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 21:03:19,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 21:03:19,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 21:03:19,419 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 174 flow. Second operand 5 states and 626 transitions. [2023-08-03 21:03:19,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 315 flow [2023-08-03 21:03:19,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 21:03:19,424 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 183 flow [2023-08-03 21:03:19,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2023-08-03 21:03:19,426 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-03 21:03:19,426 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 183 flow [2023-08-03 21:03:19,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 21:03:19,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:19,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:03:19,434 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 21:03:19,631 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 21:03:19,632 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 21:03:19,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash 145845329, now seen corresponding path program 1 times [2023-08-03 21:03:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:19,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884381986] [2023-08-03 21:03:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:19,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:19,693 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 21:03:19,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:19,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884381986] [2023-08-03 21:03:19,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884381986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:19,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541687742] [2023-08-03 21:03:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:19,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:19,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:19,695 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 21:03:19,701 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 21:03:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:19,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:03:19,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:19,767 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 21:03:19,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:03:19,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541687742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:03:19,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:03:19,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 21:03:19,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354810361] [2023-08-03 21:03:19,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:03:19,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:03:19,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:19,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:03:19,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:03:19,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-03 21:03:19,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 21:03:19,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:19,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-03 21:03:19,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:20,830 INFO L124 PetriNetUnfolderBase]: 14020/21075 cut-off events. [2023-08-03 21:03:20,830 INFO L125 PetriNetUnfolderBase]: For 2241/2241 co-relation queries the response was YES. [2023-08-03 21:03:20,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42591 conditions, 21075 events. 14020/21075 cut-off events. For 2241/2241 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 138075 event pairs, 8601 based on Foata normal form. 0/17154 useless extension candidates. Maximal degree in co-relation 9751. Up to 13780 conditions per place. [2023-08-03 21:03:20,936 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 60 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-03 21:03:20,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 357 flow [2023-08-03 21:03:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:03:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:03:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-03 21:03:20,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2023-08-03 21:03:20,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-03 21:03:20,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-03 21:03:20,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:20,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-03 21:03:20,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 21:03:20,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:03:20,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:03:20,945 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 183 flow. Second operand 3 states and 405 transitions. [2023-08-03 21:03:20,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 357 flow [2023-08-03 21:03:20,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 350 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:03:20,949 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 188 flow [2023-08-03 21:03:20,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2023-08-03 21:03:20,952 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-03 21:03:20,952 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 188 flow [2023-08-03 21:03:20,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 21:03:20,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:20,952 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:03:20,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:03:21,157 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 21:03:21,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:03:21,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1119288174, now seen corresponding path program 1 times [2023-08-03 21:03:21,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:21,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734944278] [2023-08-03 21:03:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:21,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:21,219 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 21:03:21,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:21,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734944278] [2023-08-03 21:03:21,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734944278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:21,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985953593] [2023-08-03 21:03:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:21,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:21,223 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 21:03:21,225 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 21:03:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:21,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:03:21,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:21,305 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 21:03:21,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:03:21,326 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 21:03:21,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985953593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:03:21,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:03:21,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:03:21,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362740748] [2023-08-03 21:03:21,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:03:21,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:03:21,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:03:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:03:21,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-03 21:03:21,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 21:03:21,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:21,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-03 21:03:21,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:22,534 INFO L124 PetriNetUnfolderBase]: 12808/19276 cut-off events. [2023-08-03 21:03:22,535 INFO L125 PetriNetUnfolderBase]: For 4104/4104 co-relation queries the response was YES. [2023-08-03 21:03:22,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40256 conditions, 19276 events. 12808/19276 cut-off events. For 4104/4104 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 123945 event pairs, 5162 based on Foata normal form. 5/16190 useless extension candidates. Maximal degree in co-relation 11597. Up to 17195 conditions per place. [2023-08-03 21:03:22,625 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 53 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-03 21:03:22,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 322 flow [2023-08-03 21:03:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:03:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:03:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 511 transitions. [2023-08-03 21:03:22,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459401709401709 [2023-08-03 21:03:22,627 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 511 transitions. [2023-08-03 21:03:22,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 511 transitions. [2023-08-03 21:03:22,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:22,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 511 transitions. [2023-08-03 21:03:22,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 21:03:22,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 21:03:22,631 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 21:03:22,631 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 188 flow. Second operand 4 states and 511 transitions. [2023-08-03 21:03:22,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 322 flow [2023-08-03 21:03:22,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:03:22,663 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 184 flow [2023-08-03 21:03:22,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-08-03 21:03:22,664 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-03 21:03:22,664 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 184 flow [2023-08-03 21:03:22,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 21:03:22,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:22,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:03:22,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 21:03:22,873 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 21:03:22,873 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:03:22,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:22,874 INFO L85 PathProgramCache]: Analyzing trace with hash 309655459, now seen corresponding path program 1 times [2023-08-03 21:03:22,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:22,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546885992] [2023-08-03 21:03:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:22,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:22,949 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 21:03:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546885992] [2023-08-03 21:03:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546885992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110141164] [2023-08-03 21:03:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:22,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:22,951 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 21:03:22,954 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 21:03:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:23,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:03:23,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:23,035 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 21:03:23,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:03:23,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110141164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:03:23,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:03:23,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 21:03:23,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712867215] [2023-08-03 21:03:23,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:03:23,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:03:23,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:03:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:03:23,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-03 21:03:23,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 21:03:23,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:23,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-03 21:03:23,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:24,044 INFO L124 PetriNetUnfolderBase]: 11453/16893 cut-off events. [2023-08-03 21:03:24,045 INFO L125 PetriNetUnfolderBase]: For 2121/2121 co-relation queries the response was YES. [2023-08-03 21:03:24,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36019 conditions, 16893 events. 11453/16893 cut-off events. For 2121/2121 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 103283 event pairs, 780 based on Foata normal form. 320/14402 useless extension candidates. Maximal degree in co-relation 10303. Up to 13769 conditions per place. [2023-08-03 21:03:24,277 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 73 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-08-03 21:03:24,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 406 flow [2023-08-03 21:03:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:03:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:03:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 646 transitions. [2023-08-03 21:03:24,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521367521367522 [2023-08-03 21:03:24,280 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 646 transitions. [2023-08-03 21:03:24,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 646 transitions. [2023-08-03 21:03:24,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:24,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 646 transitions. [2023-08-03 21:03:24,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.2) internal successors, (646), 5 states have internal predecessors, (646), 0 states have call successors, (0), 0 states 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 21:03:24,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 21:03:24,285 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 21:03:24,285 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 184 flow. Second operand 5 states and 646 transitions. [2023-08-03 21:03:24,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 406 flow [2023-08-03 21:03:24,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 394 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 21:03:24,323 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 189 flow [2023-08-03 21:03:24,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-08-03 21:03:24,325 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-03 21:03:24,325 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 189 flow [2023-08-03 21:03:24,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 21:03:24,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:24,326 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] [2023-08-03 21:03:24,333 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 21:03:24,530 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 21:03:24,530 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 21:03:24,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1717799297, now seen corresponding path program 1 times [2023-08-03 21:03:24,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504113595] [2023-08-03 21:03:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:24,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:24,592 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 21:03:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504113595] [2023-08-03 21:03:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504113595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:24,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623139480] [2023-08-03 21:03:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:24,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:24,594 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 21:03:24,596 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 21:03:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:24,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 21:03:24,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:24,678 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 21:03:24,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:03:24,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623139480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:03:24,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:03:24,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 21:03:24,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954364231] [2023-08-03 21:03:24,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:03:24,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:03:24,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:03:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:03:24,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 234 [2023-08-03 21:03:24,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 21:03:24,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:24,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 234 [2023-08-03 21:03:24,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:25,708 INFO L124 PetriNetUnfolderBase]: 11114/16698 cut-off events. [2023-08-03 21:03:25,708 INFO L125 PetriNetUnfolderBase]: For 5783/5783 co-relation queries the response was YES. [2023-08-03 21:03:25,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36393 conditions, 16698 events. 11114/16698 cut-off events. For 5783/5783 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 104559 event pairs, 8027 based on Foata normal form. 0/14101 useless extension candidates. Maximal degree in co-relation 10536. Up to 12258 conditions per place. [2023-08-03 21:03:25,800 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 61 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-03 21:03:25,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 363 flow [2023-08-03 21:03:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:03:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:03:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-03 21:03:25,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2023-08-03 21:03:25,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-03 21:03:25,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-03 21:03:25,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:25,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-03 21:03:25,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 21:03:25,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:03:25,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 21:03:25,805 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 189 flow. Second operand 3 states and 405 transitions. [2023-08-03 21:03:25,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 363 flow [2023-08-03 21:03:25,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 356 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:03:25,822 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 194 flow [2023-08-03 21:03:25,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-03 21:03:25,822 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-03 21:03:25,822 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 194 flow [2023-08-03 21:03:25,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 21:03:25,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:25,823 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, 1, 1, 1, 1, 1] [2023-08-03 21:03:25,831 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 21:03:26,028 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 21:03:26,028 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 21:03:26,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash -865225246, now seen corresponding path program 1 times [2023-08-03 21:03:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976200660] [2023-08-03 21:03:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:26,095 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 21:03:26,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:26,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976200660] [2023-08-03 21:03:26,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976200660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:26,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764206826] [2023-08-03 21:03:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:26,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:26,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:26,097 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 21:03:26,098 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 21:03:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:26,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:03:26,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:26,175 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 21:03:26,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:03:26,190 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 21:03:26,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764206826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:03:26,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:03:26,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:03:26,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553932954] [2023-08-03 21:03:26,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:03:26,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:03:26,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:26,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:03:26,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:03:26,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-03 21:03:26,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 21:03:26,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:26,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-03 21:03:26,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:26,989 INFO L124 PetriNetUnfolderBase]: 10484/15636 cut-off events. [2023-08-03 21:03:26,989 INFO L125 PetriNetUnfolderBase]: For 3615/3615 co-relation queries the response was YES. [2023-08-03 21:03:27,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34640 conditions, 15636 events. 10484/15636 cut-off events. For 3615/3615 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 93497 event pairs, 4926 based on Foata normal form. 80/13499 useless extension candidates. Maximal degree in co-relation 24609. Up to 12674 conditions per place. [2023-08-03 21:03:27,062 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 66 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-03 21:03:27,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 378 flow [2023-08-03 21:03:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:03:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:03:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2023-08-03 21:03:27,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587606837606838 [2023-08-03 21:03:27,064 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2023-08-03 21:03:27,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2023-08-03 21:03:27,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:27,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2023-08-03 21:03:27,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 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 21:03:27,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 21:03:27,067 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 21:03:27,068 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 194 flow. Second operand 4 states and 523 transitions. [2023-08-03 21:03:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 378 flow [2023-08-03 21:03:27,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:03:27,224 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 190 flow [2023-08-03 21:03:27,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2023-08-03 21:03:27,225 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2023-08-03 21:03:27,225 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 190 flow [2023-08-03 21:03:27,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 21:03:27,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:27,225 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, 1, 1, 1, 1, 1] [2023-08-03 21:03:27,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 21:03:27,430 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 21:03:27,430 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 21:03:27,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:27,431 INFO L85 PathProgramCache]: Analyzing trace with hash -134964842, now seen corresponding path program 1 times [2023-08-03 21:03:27,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:27,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441447463] [2023-08-03 21:03:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:27,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:27,483 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 21:03:27,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:27,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441447463] [2023-08-03 21:03:27,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441447463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:27,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953135145] [2023-08-03 21:03:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:27,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:27,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:27,486 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 21:03:27,510 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 21:03:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:27,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:03:27,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:27,581 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 21:03:27,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:03:27,599 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 21:03:27,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953135145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:03:27,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:03:27,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 21:03:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468360612] [2023-08-03 21:03:27,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:03:27,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:03:27,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:27,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:03:27,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:03:27,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-03 21:03:27,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 21:03:27,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:27,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-03 21:03:27,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:28,315 INFO L124 PetriNetUnfolderBase]: 8195/12325 cut-off events. [2023-08-03 21:03:28,315 INFO L125 PetriNetUnfolderBase]: For 5041/5041 co-relation queries the response was YES. [2023-08-03 21:03:28,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27227 conditions, 12325 events. 8195/12325 cut-off events. For 5041/5041 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 72519 event pairs, 2927 based on Foata normal form. 304/10882 useless extension candidates. Maximal degree in co-relation 25269. Up to 4615 conditions per place. [2023-08-03 21:03:28,379 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 73 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-08-03 21:03:28,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 420 flow [2023-08-03 21:03:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:03:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:03:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-03 21:03:28,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2023-08-03 21:03:28,381 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-03 21:03:28,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-03 21:03:28,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:28,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-03 21:03:28,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 21:03:28,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 21:03:28,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 21:03:28,385 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 190 flow. Second operand 4 states and 531 transitions. [2023-08-03 21:03:28,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 420 flow [2023-08-03 21:03:28,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 414 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 21:03:28,419 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 204 flow [2023-08-03 21:03:28,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-03 21:03:28,419 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-03 21:03:28,419 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 204 flow [2023-08-03 21:03:28,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 21:03:28,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:28,420 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:03:28,424 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 21:03:28,621 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 21:03:28,621 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 21:03:28,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1040041170, now seen corresponding path program 1 times [2023-08-03 21:03:28,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:28,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448502963] [2023-08-03 21:03:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:28,697 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 21:03:28,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:28,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448502963] [2023-08-03 21:03:28,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448502963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:28,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874608378] [2023-08-03 21:03:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:28,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:28,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:28,700 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 21:03:28,732 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 21:03:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:28,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:03:28,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:28,813 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 21:03:28,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:03:28,826 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 21:03:28,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874608378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:03:28,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:03:28,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:03:28,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907740933] [2023-08-03 21:03:28,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:03:28,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:03:28,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:03:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:03:28,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 234 [2023-08-03 21:03:28,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 21:03:28,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:28,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 234 [2023-08-03 21:03:28,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:29,752 INFO L124 PetriNetUnfolderBase]: 8181/12295 cut-off events. [2023-08-03 21:03:29,752 INFO L125 PetriNetUnfolderBase]: For 7041/7041 co-relation queries the response was YES. [2023-08-03 21:03:29,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28929 conditions, 12295 events. 8181/12295 cut-off events. For 7041/7041 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 72117 event pairs, 7040 based on Foata normal form. 18/10489 useless extension candidates. Maximal degree in co-relation 26921. Up to 10456 conditions per place. [2023-08-03 21:03:29,795 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 74 selfloop transitions, 3 changer transitions 1/89 dead transitions. [2023-08-03 21:03:29,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 436 flow [2023-08-03 21:03:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:03:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:03:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-03 21:03:29,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2023-08-03 21:03:29,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-03 21:03:29,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-03 21:03:29,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:29,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-03 21:03:29,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 21:03:29,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 21:03:29,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 21:03:29,801 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 204 flow. Second operand 4 states and 531 transitions. [2023-08-03 21:03:29,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 436 flow [2023-08-03 21:03:29,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 21:03:29,848 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 214 flow [2023-08-03 21:03:29,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-08-03 21:03:29,848 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-03 21:03:29,848 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 214 flow [2023-08-03 21:03:29,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 21:03:29,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:29,849 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, 1, 1, 1, 1, 1] [2023-08-03 21:03:29,853 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 21:03:30,053 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 21:03:30,053 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 21:03:30,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:30,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1261694289, now seen corresponding path program 1 times [2023-08-03 21:03:30,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:30,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306559720] [2023-08-03 21:03:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:30,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 21:03:30,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306559720] [2023-08-03 21:03:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306559720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:03:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965711991] [2023-08-03 21:03:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:30,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:03:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:03:30,871 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 21:03:30,895 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 21:03:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:30,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-03 21:03:30,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:03:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 21:03:31,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:03:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 21:03:31,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965711991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:03:31,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:03:31,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 20 [2023-08-03 21:03:31,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617451639] [2023-08-03 21:03:31,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:03:31,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-03 21:03:31,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-03 21:03:31,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-03 21:03:31,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 234 [2023-08-03 21:03:31,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 214 flow. Second operand has 20 states, 20 states have (on average 87.65) internal successors, (1753), 20 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states 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 21:03:31,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:31,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 234 [2023-08-03 21:03:31,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:03:40,354 INFO L124 PetriNetUnfolderBase]: 58756/81534 cut-off events. [2023-08-03 21:03:40,355 INFO L125 PetriNetUnfolderBase]: For 31420/31420 co-relation queries the response was YES. [2023-08-03 21:03:40,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191382 conditions, 81534 events. 58756/81534 cut-off events. For 31420/31420 co-relation queries the response was YES. Maximal size of possible extension queue 1506. Compared 489653 event pairs, 6674 based on Foata normal form. 54/75099 useless extension candidates. Maximal degree in co-relation 190521. Up to 22472 conditions per place. [2023-08-03 21:03:40,774 INFO L140 encePairwiseOnDemand]: 209/234 looper letters, 852 selfloop transitions, 349 changer transitions 39/1241 dead transitions. [2023-08-03 21:03:40,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1241 transitions, 5775 flow [2023-08-03 21:03:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-08-03 21:03:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-08-03 21:03:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 8117 transitions. [2023-08-03 21:03:40,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41295278795278795 [2023-08-03 21:03:40,796 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 8117 transitions. [2023-08-03 21:03:40,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 8117 transitions. [2023-08-03 21:03:40,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:03:40,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 8117 transitions. [2023-08-03 21:03:40,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 96.63095238095238) internal successors, (8117), 84 states have internal predecessors, (8117), 0 states have call successors, (0), 0 states 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 21:03:40,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 234.0) internal successors, (19890), 85 states have internal predecessors, (19890), 0 states have call successors, (0), 0 states 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 21:03:40,854 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 234.0) internal successors, (19890), 85 states have internal predecessors, (19890), 0 states have call successors, (0), 0 states 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 21:03:40,855 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 214 flow. Second operand 84 states and 8117 transitions. [2023-08-03 21:03:40,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1241 transitions, 5775 flow [2023-08-03 21:03:43,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 1241 transitions, 5738 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-03 21:03:43,020 INFO L231 Difference]: Finished difference. Result has 212 places, 486 transitions, 3076 flow [2023-08-03 21:03:43,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=3076, PETRI_PLACES=212, PETRI_TRANSITIONS=486} [2023-08-03 21:03:43,021 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 161 predicate places. [2023-08-03 21:03:43,021 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 486 transitions, 3076 flow [2023-08-03 21:03:43,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 87.65) internal successors, (1753), 20 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states 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 21:03:43,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:03:43,022 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, 1, 1, 1, 1, 1] [2023-08-03 21:03:43,026 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 21:03:43,225 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,SelfDestructingSolverStorable12 [2023-08-03 21:03:43,225 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 21:03:43,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:03:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1450906743, now seen corresponding path program 1 times [2023-08-03 21:03:43,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:03:43,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678000026] [2023-08-03 21:03:43,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:03:43,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:03:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:03:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 21:03:43,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:03:43,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678000026] [2023-08-03 21:03:43,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678000026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:03:43,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:03:43,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 21:03:43,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649625780] [2023-08-03 21:03:43,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:03:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 21:03:43,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:03:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 21:03:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-03 21:03:43,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-03 21:03:43,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 486 transitions, 3076 flow. Second operand has 7 states, 7 states have (on average 103.28571428571429) internal successors, (723), 7 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 21:03:43,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:03:43,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-03 21:03:43,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:04:00,327 INFO L124 PetriNetUnfolderBase]: 81223/113954 cut-off events. [2023-08-03 21:04:00,327 INFO L125 PetriNetUnfolderBase]: For 2706607/2708931 co-relation queries the response was YES. [2023-08-03 21:04:01,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642885 conditions, 113954 events. 81223/113954 cut-off events. For 2706607/2708931 co-relation queries the response was YES. Maximal size of possible extension queue 2881. Compared 768833 event pairs, 15046 based on Foata normal form. 199/105150 useless extension candidates. Maximal degree in co-relation 642100. Up to 26024 conditions per place. [2023-08-03 21:04:01,757 INFO L140 encePairwiseOnDemand]: 218/234 looper letters, 627 selfloop transitions, 417 changer transitions 109/1180 dead transitions. [2023-08-03 21:04:01,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1180 transitions, 10600 flow [2023-08-03 21:04:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-03 21:04:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-03 21:04:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2412 transitions. [2023-08-03 21:04:01,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425101214574899 [2023-08-03 21:04:01,761 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2412 transitions. [2023-08-03 21:04:01,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2412 transitions. [2023-08-03 21:04:01,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:04:01,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2412 transitions. [2023-08-03 21:04:01,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.94736842105263) internal successors, (2412), 19 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states 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 21:04:01,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 234.0) internal successors, (4680), 20 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 21:04:01,771 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 234.0) internal successors, (4680), 20 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states 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 21:04:01,771 INFO L175 Difference]: Start difference. First operand has 212 places, 486 transitions, 3076 flow. Second operand 19 states and 2412 transitions. [2023-08-03 21:04:01,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1180 transitions, 10600 flow [2023-08-03 21:04:37,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1180 transitions, 10244 flow, removed 95 selfloop flow, removed 8 redundant places. [2023-08-03 21:04:37,458 INFO L231 Difference]: Finished difference. Result has 235 places, 680 transitions, 5577 flow [2023-08-03 21:04:37,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5577, PETRI_PLACES=235, PETRI_TRANSITIONS=680} [2023-08-03 21:04:37,459 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 184 predicate places. [2023-08-03 21:04:37,459 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 680 transitions, 5577 flow [2023-08-03 21:04:37,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 103.28571428571429) internal successors, (723), 7 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 21:04:37,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:04:37,460 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, 1, 1, 1, 1, 1] [2023-08-03 21:04:37,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 21:04:37,460 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 21:04:37,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:04:37,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1328733245, now seen corresponding path program 2 times [2023-08-03 21:04:37,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:04:37,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79953845] [2023-08-03 21:04:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:04:37,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:04:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:04:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:04:37,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:04:37,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79953845] [2023-08-03 21:04:37,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79953845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:04:37,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222853282] [2023-08-03 21:04:37,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:04:37,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:04:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:04:37,753 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 21:04:37,775 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 21:04:37,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:04:37,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:04:37,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 21:04:37,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:04:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:04:37,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:04:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:04:38,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222853282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:04:38,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:04:38,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-03 21:04:38,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005211545] [2023-08-03 21:04:38,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:04:38,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 21:04:38,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:04:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 21:04:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-03 21:04:38,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-03 21:04:38,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 680 transitions, 5577 flow. Second operand has 13 states, 13 states have (on average 103.84615384615384) internal successors, (1350), 13 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states 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 21:04:38,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:04:38,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-03 21:04:38,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:05:17,408 INFO L124 PetriNetUnfolderBase]: 158681/224941 cut-off events. [2023-08-03 21:05:17,409 INFO L125 PetriNetUnfolderBase]: For 6910891/6915640 co-relation queries the response was YES. [2023-08-03 21:05:19,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1481532 conditions, 224941 events. 158681/224941 cut-off events. For 6910891/6915640 co-relation queries the response was YES. Maximal size of possible extension queue 5988. Compared 1699717 event pairs, 26384 based on Foata normal form. 150/209255 useless extension candidates. Maximal degree in co-relation 1480005. Up to 43196 conditions per place. [2023-08-03 21:05:20,874 INFO L140 encePairwiseOnDemand]: 218/234 looper letters, 917 selfloop transitions, 665 changer transitions 156/1765 dead transitions. [2023-08-03 21:05:20,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1765 transitions, 19024 flow [2023-08-03 21:05:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 21:05:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 21:05:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1798 transitions. [2023-08-03 21:05:20,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488400488400489 [2023-08-03 21:05:20,877 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1798 transitions. [2023-08-03 21:05:20,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1798 transitions. [2023-08-03 21:05:20,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:05:20,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1798 transitions. [2023-08-03 21:05:20,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 128.42857142857142) internal successors, (1798), 14 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states 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 21:05:20,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 234.0) internal successors, (3510), 15 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states 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 21:05:20,883 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 234.0) internal successors, (3510), 15 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states 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 21:05:20,884 INFO L175 Difference]: Start difference. First operand has 235 places, 680 transitions, 5577 flow. Second operand 14 states and 1798 transitions. [2023-08-03 21:05:20,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1765 transitions, 19024 flow [2023-08-03 21:15:33,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1765 transitions, 18100 flow, removed 178 selfloop flow, removed 4 redundant places. [2023-08-03 21:15:33,076 INFO L231 Difference]: Finished difference. Result has 254 places, 1128 transitions, 11827 flow [2023-08-03 21:15:33,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=5163, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11827, PETRI_PLACES=254, PETRI_TRANSITIONS=1128} [2023-08-03 21:15:33,077 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 203 predicate places. [2023-08-03 21:15:33,077 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 1128 transitions, 11827 flow [2023-08-03 21:15:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 103.84615384615384) internal successors, (1350), 13 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states 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 21:15:33,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:15:33,077 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, 1, 1, 1, 1, 1] [2023-08-03 21:15:33,082 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 21:15:33,278 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,SelfDestructingSolverStorable14 [2023-08-03 21:15:33,278 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 21:15:33,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:15:33,279 INFO L85 PathProgramCache]: Analyzing trace with hash -881453711, now seen corresponding path program 1 times [2023-08-03 21:15:33,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:15:33,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824227353] [2023-08-03 21:15:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:15:33,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:15:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:15:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:15:33,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:15:33,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824227353] [2023-08-03 21:15:33,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824227353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:15:33,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633418088] [2023-08-03 21:15:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:15:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:15:33,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:15:33,501 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 21:15:33,505 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 21:15:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:15:33,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-03 21:15:33,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:15:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:15:33,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:15:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 21:15:33,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633418088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:15:33,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:15:33,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-03 21:15:33,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542307597] [2023-08-03 21:15:33,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:15:33,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 21:15:33,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:15:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 21:15:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-03 21:15:34,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-03 21:15:34,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 1128 transitions, 11827 flow. Second operand has 13 states, 13 states have (on average 102.92307692307692) internal successors, (1338), 13 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states 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 21:15:34,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:15:34,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-03 21:15:34,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand