/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-dist.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:21:49,542 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:21:49,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:21:49,623 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:21:49,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:21:49,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:21:49,625 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:21:49,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:21:49,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:21:49,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:21:49,662 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:21:49,662 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:21:49,663 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:21:49,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:21:49,665 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:21:49,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:21:49,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:21:49,665 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:21:49,666 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:21:49,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:21:49,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:21:49,666 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:21:49,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:21:49,667 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:21:49,667 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:21:49,668 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:21:49,668 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:21:49,669 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:21:49,669 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:21:49,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:21:49,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:21:49,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:21:49,671 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:21:49,671 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:21:49,671 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:21:49,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:21:49,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:21:49,671 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:21:49,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:21:49,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:21:49,672 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:21:49,672 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:21:49,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:21:49,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:21:49,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:21:49,960 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:21:49,960 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:21:49,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-dist.wvr_bound2.c [2023-08-04 02:21:51,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:21:51,356 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:21:51,357 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-dist.wvr_bound2.c [2023-08-04 02:21:51,365 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6e93c80/f13a20fcdabd441990c60727d3d5146b/FLAG82d9180c3 [2023-08-04 02:21:51,385 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6e93c80/f13a20fcdabd441990c60727d3d5146b [2023-08-04 02:21:51,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:21:51,393 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:21:51,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:21:51,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:21:51,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:21:51,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215db7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51, skipping insertion in model container [2023-08-04 02:21:51,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,429 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:21:51,617 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_mult-dist.wvr_bound2.c[2359,2372] [2023-08-04 02:21:51,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:21:51,634 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:21:51,675 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_mult-dist.wvr_bound2.c[2359,2372] [2023-08-04 02:21:51,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:21:51,689 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:21:51,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51 WrapperNode [2023-08-04 02:21:51,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:21:51,690 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:21:51,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:21:51,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:21:51,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,739 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 121 [2023-08-04 02:21:51,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:21:51,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:21:51,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:21:51,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:21:51,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,761 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,776 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:21:51,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:21:51,782 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:21:51,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:21:51,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (1/1) ... [2023-08-04 02:21:51,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:21:51,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:21:51,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:21:51,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:21:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:21:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:21:51,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:21:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:21:51,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:21:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:21:51,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:21:51,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:21:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:21:51,860 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:21:51,948 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:21:51,949 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:21:52,274 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:21:52,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:21:52,282 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 02:21:52,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:21:52 BoogieIcfgContainer [2023-08-04 02:21:52,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:21:52,286 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:21:52,286 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:21:52,290 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:21:52,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:21:51" (1/3) ... [2023-08-04 02:21:52,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c462afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:21:52, skipping insertion in model container [2023-08-04 02:21:52,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:21:51" (2/3) ... [2023-08-04 02:21:52,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c462afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:21:52, skipping insertion in model container [2023-08-04 02:21:52,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:21:52" (3/3) ... [2023-08-04 02:21:52,293 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_mult-dist.wvr_bound2.c [2023-08-04 02:21:52,299 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:21:52,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:21:52,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:21:52,306 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:21:52,375 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:21:52,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 02:21:52,613 INFO L124 PetriNetUnfolderBase]: 96/621 cut-off events. [2023-08-04 02:21:52,614 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:21:52,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 621 events. 96/621 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3239 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 346. Up to 16 conditions per place. [2023-08-04 02:21:52,628 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 02:21:52,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 153 transitions, 348 flow [2023-08-04 02:21:52,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:21:52,646 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 153 transitions, 348 flow [2023-08-04 02:21:52,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 153 transitions, 348 flow [2023-08-04 02:21:52,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 153 transitions, 348 flow [2023-08-04 02:21:52,716 INFO L124 PetriNetUnfolderBase]: 96/621 cut-off events. [2023-08-04 02:21:52,717 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:21:52,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 621 events. 96/621 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3239 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 346. Up to 16 conditions per place. [2023-08-04 02:21:52,729 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 02:21:55,524 INFO L134 LiptonReduction]: Checked pairs total: 7970 [2023-08-04 02:21:55,524 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-04 02:21:55,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:21:55,553 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;@7651124, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:21:55,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:21:55,562 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:21:55,562 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-08-04 02:21:55,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:21:55,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:21:55,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:21:55,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:21:55,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:21:55,569 INFO L85 PathProgramCache]: Analyzing trace with hash -366557933, now seen corresponding path program 1 times [2023-08-04 02:21:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:21:55,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598476377] [2023-08-04 02:21:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:21:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:21:55,671 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:21:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:21:55,703 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:21:55,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:21:55,706 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:21:55,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:21:55,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:21:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:21:55,708 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:21:55,710 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:21:55,711 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:21:55,711 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:21:55,736 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:21:55,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 02:21:56,221 INFO L124 PetriNetUnfolderBase]: 886/4110 cut-off events. [2023-08-04 02:21:56,221 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:21:56,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 4110 events. 886/4110 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33172 event pairs, 33 based on Foata normal form. 0/3468 useless extension candidates. Maximal degree in co-relation 2415. Up to 192 conditions per place. [2023-08-04 02:21:56,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 02:21:56,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 195 transitions, 480 flow [2023-08-04 02:21:56,288 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:21:56,288 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 195 transitions, 480 flow [2023-08-04 02:21:56,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 195 transitions, 480 flow [2023-08-04 02:21:56,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 02:21:56,711 INFO L124 PetriNetUnfolderBase]: 886/4110 cut-off events. [2023-08-04 02:21:56,711 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:21:56,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 4110 events. 886/4110 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33172 event pairs, 33 based on Foata normal form. 0/3468 useless extension candidates. Maximal degree in co-relation 2415. Up to 192 conditions per place. [2023-08-04 02:21:56,824 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 02:21:59,665 INFO L134 LiptonReduction]: Checked pairs total: 24306 [2023-08-04 02:21:59,665 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-04 02:21:59,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:21:59,668 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;@7651124, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:21:59,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:21:59,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:21:59,676 INFO L124 PetriNetUnfolderBase]: 15/115 cut-off events. [2023-08-04 02:21:59,676 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:21:59,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:21:59,676 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:21:59,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:21:59,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:21:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash 603800977, now seen corresponding path program 1 times [2023-08-04 02:21:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:21:59,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844849757] [2023-08-04 02:21:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:59,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:21:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:21:59,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:21:59,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844849757] [2023-08-04 02:21:59,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844849757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:21:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750052374] [2023-08-04 02:21:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:21:59,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:21:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:21:59,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:21:59,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:21:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:21:59,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:21:59,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:21:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:21:59,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:21:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750052374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:21:59,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:21:59,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:21:59,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766541655] [2023-08-04 02:21:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:21:59,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:21:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:21:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:21:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:21:59,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 02:22:00,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 71 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 153.6) internal successors, (768), 5 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:00,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:00,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 02:22:00,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:20,358 INFO L124 PetriNetUnfolderBase]: 284659/341184 cut-off events. [2023-08-04 02:22:20,358 INFO L125 PetriNetUnfolderBase]: For 33363/33363 co-relation queries the response was YES. [2023-08-04 02:22:21,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692244 conditions, 341184 events. 284659/341184 cut-off events. For 33363/33363 co-relation queries the response was YES. Maximal size of possible extension queue 6428. Compared 1653960 event pairs, 99499 based on Foata normal form. 0/191731 useless extension candidates. Maximal degree in co-relation 225735. Up to 329948 conditions per place. [2023-08-04 02:22:21,636 INFO L140 encePairwiseOnDemand]: 331/336 looper letters, 32 selfloop transitions, 5 changer transitions 31/79 dead transitions. [2023-08-04 02:22:21,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 374 flow [2023-08-04 02:22:21,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:22:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:22:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 827 transitions. [2023-08-04 02:22:21,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4922619047619048 [2023-08-04 02:22:21,656 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 827 transitions. [2023-08-04 02:22:21,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 827 transitions. [2023-08-04 02:22:21,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:21,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 827 transitions. [2023-08-04 02:22:21,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.4) internal successors, (827), 5 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:21,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:21,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:21,684 INFO L175 Difference]: Start difference. First operand has 60 places, 71 transitions, 232 flow. Second operand 5 states and 827 transitions. [2023-08-04 02:22:21,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 374 flow [2023-08-04 02:22:21,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:22:21,734 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 129 flow [2023-08-04 02:22:21,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2023-08-04 02:22:21,739 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2023-08-04 02:22:21,740 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 129 flow [2023-08-04 02:22:21,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.6) internal successors, (768), 5 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:21,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:21,741 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:22:21,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:22:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:22:21,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:22:21,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1947133628, now seen corresponding path program 1 times [2023-08-04 02:22:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766565690] [2023-08-04 02:22:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:21,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:22:22,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:22,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766565690] [2023-08-04 02:22:22,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766565690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:22:22,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:22:22,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:22:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249377613] [2023-08-04 02:22:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:22:22,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:22:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:22:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:22:22,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 02:22:22,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:22,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:22,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 02:22:22,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:24,275 INFO L124 PetriNetUnfolderBase]: 37880/44945 cut-off events. [2023-08-04 02:22:24,275 INFO L125 PetriNetUnfolderBase]: For 1783/1783 co-relation queries the response was YES. [2023-08-04 02:22:24,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91340 conditions, 44945 events. 37880/44945 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 164777 event pairs, 16093 based on Foata normal form. 1/25174 useless extension candidates. Maximal degree in co-relation 26219. Up to 43925 conditions per place. [2023-08-04 02:22:24,532 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 30 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-04 02:22:24,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 196 flow [2023-08-04 02:22:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:22:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:22:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-04 02:22:24,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4871031746031746 [2023-08-04 02:22:24,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-04 02:22:24,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-04 02:22:24,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:24,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-04 02:22:24,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:24,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:24,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:24,540 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 129 flow. Second operand 3 states and 491 transitions. [2023-08-04 02:22:24,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 196 flow [2023-08-04 02:22:24,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 191 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:22:24,545 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 123 flow [2023-08-04 02:22:24,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-04 02:22:24,547 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -11 predicate places. [2023-08-04 02:22:24,547 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 123 flow [2023-08-04 02:22:24,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:24,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:24,547 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:22:24,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:22:24,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:22:24,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash -718316835, now seen corresponding path program 1 times [2023-08-04 02:22:24,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:24,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234952835] [2023-08-04 02:22:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:22:24,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:24,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234952835] [2023-08-04 02:22:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234952835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:22:24,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6155253] [2023-08-04 02:22:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:24,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:22:24,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:22:24,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:22:24,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:22:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:24,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:22:24,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:22:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:22:24,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:22:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:22:24,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6155253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:22:24,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:22:24,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:22:24,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006773883] [2023-08-04 02:22:24,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:22:24,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:22:24,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:24,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:22:24,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:22:24,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 02:22:24,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:24,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:24,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 02:22:24,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:26,716 INFO L124 PetriNetUnfolderBase]: 29926/35233 cut-off events. [2023-08-04 02:22:26,716 INFO L125 PetriNetUnfolderBase]: For 1130/1130 co-relation queries the response was YES. [2023-08-04 02:22:26,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71346 conditions, 35233 events. 29926/35233 cut-off events. For 1130/1130 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 121672 event pairs, 9807 based on Foata normal form. 3/19648 useless extension candidates. Maximal degree in co-relation 51577. Up to 34435 conditions per place. [2023-08-04 02:22:26,870 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 32 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-04 02:22:26,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 204 flow [2023-08-04 02:22:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:22:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:22:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 644 transitions. [2023-08-04 02:22:26,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-08-04 02:22:26,873 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 644 transitions. [2023-08-04 02:22:26,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 644 transitions. [2023-08-04 02:22:26,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:26,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 644 transitions. [2023-08-04 02:22:26,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:26,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:26,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:26,878 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 123 flow. Second operand 4 states and 644 transitions. [2023-08-04 02:22:26,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 204 flow [2023-08-04 02:22:26,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:22:26,881 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 120 flow [2023-08-04 02:22:26,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-08-04 02:22:26,884 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -10 predicate places. [2023-08-04 02:22:26,884 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 120 flow [2023-08-04 02:22:26,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:26,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:26,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:22:26,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:22:27,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 02:22:27,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:22:27,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash -324755427, now seen corresponding path program 1 times [2023-08-04 02:22:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:27,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845789101] [2023-08-04 02:22:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:22:27,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845789101] [2023-08-04 02:22:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845789101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:22:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119081838] [2023-08-04 02:22:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:27,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:22:27,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:22:27,209 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) [2023-08-04 02:22:27,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:22:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:27,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:22:27,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:22:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:22:27,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:22:27,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119081838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:22:27,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:22:27,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:22:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744554500] [2023-08-04 02:22:27,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:22:27,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:22:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:22:27,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:22:27,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 02:22:27,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:27,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:27,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 02:22:27,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:29,113 INFO L124 PetriNetUnfolderBase]: 27664/33259 cut-off events. [2023-08-04 02:22:29,114 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2023-08-04 02:22:29,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66936 conditions, 33259 events. 27664/33259 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 128133 event pairs, 4237 based on Foata normal form. 0/18883 useless extension candidates. Maximal degree in co-relation 24164. Up to 31128 conditions per place. [2023-08-04 02:22:29,278 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 45 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-04 02:22:29,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 260 flow [2023-08-04 02:22:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:22:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:22:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 810 transitions. [2023-08-04 02:22:29,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2023-08-04 02:22:29,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 810 transitions. [2023-08-04 02:22:29,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 810 transitions. [2023-08-04 02:22:29,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:29,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 810 transitions. [2023-08-04 02:22:29,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:29,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:29,288 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:29,288 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 120 flow. Second operand 5 states and 810 transitions. [2023-08-04 02:22:29,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 260 flow [2023-08-04 02:22:29,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 253 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:22:29,290 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 132 flow [2023-08-04 02:22:29,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-04 02:22:29,291 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -10 predicate places. [2023-08-04 02:22:29,291 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 132 flow [2023-08-04 02:22:29,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:29,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:29,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:22:29,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:22:29,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:22:29,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:22:29,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:29,498 INFO L85 PathProgramCache]: Analyzing trace with hash -836622208, now seen corresponding path program 1 times [2023-08-04 02:22:29,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:29,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24045895] [2023-08-04 02:22:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:29,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:22:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24045895] [2023-08-04 02:22:29,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24045895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:22:29,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:22:29,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:22:29,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602041754] [2023-08-04 02:22:29,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:22:29,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:22:29,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:29,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:22:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:22:29,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 02:22:29,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:29,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:29,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 02:22:29,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:31,100 INFO L124 PetriNetUnfolderBase]: 26272/31462 cut-off events. [2023-08-04 02:22:31,100 INFO L125 PetriNetUnfolderBase]: For 1077/1077 co-relation queries the response was YES. [2023-08-04 02:22:31,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63531 conditions, 31462 events. 26272/31462 cut-off events. For 1077/1077 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 118377 event pairs, 11329 based on Foata normal form. 9/17863 useless extension candidates. Maximal degree in co-relation 22894. Up to 30054 conditions per place. [2023-08-04 02:22:31,470 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 02:22:31,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 217 flow [2023-08-04 02:22:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:22:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:22:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-04 02:22:31,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2023-08-04 02:22:31,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-04 02:22:31,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-04 02:22:31,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:31,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-04 02:22:31,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:31,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:31,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:31,476 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 132 flow. Second operand 3 states and 495 transitions. [2023-08-04 02:22:31,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 217 flow [2023-08-04 02:22:31,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:22:31,478 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 130 flow [2023-08-04 02:22:31,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-04 02:22:31,478 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-08-04 02:22:31,478 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 130 flow [2023-08-04 02:22:31,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:31,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:31,479 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:22:31,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:22:31,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:22:31,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash -396421159, now seen corresponding path program 1 times [2023-08-04 02:22:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967294795] [2023-08-04 02:22:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:31,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:22:31,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:31,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967294795] [2023-08-04 02:22:31,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967294795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:22:31,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462390025] [2023-08-04 02:22:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:31,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:22:31,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:22:31,540 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) [2023-08-04 02:22:31,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:22:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:31,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:22:31,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:22:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:22:31,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:22:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:22:31,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462390025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:22:31,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:22:31,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:22:31,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995167996] [2023-08-04 02:22:31,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:22:31,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:22:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:22:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:22:31,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 02:22:31,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:31,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:31,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 02:22:31,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:32,985 INFO L124 PetriNetUnfolderBase]: 20872/24847 cut-off events. [2023-08-04 02:22:32,985 INFO L125 PetriNetUnfolderBase]: For 897/897 co-relation queries the response was YES. [2023-08-04 02:22:33,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50220 conditions, 24847 events. 20872/24847 cut-off events. For 897/897 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 89578 event pairs, 7009 based on Foata normal form. 27/14074 useless extension candidates. Maximal degree in co-relation 18049. Up to 23178 conditions per place. [2023-08-04 02:22:33,125 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 41 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-04 02:22:33,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 245 flow [2023-08-04 02:22:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:22:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:22:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 652 transitions. [2023-08-04 02:22:33,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2023-08-04 02:22:33,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 652 transitions. [2023-08-04 02:22:33,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 652 transitions. [2023-08-04 02:22:33,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:33,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 652 transitions. [2023-08-04 02:22:33,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:33,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:33,173 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:33,174 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 130 flow. Second operand 4 states and 652 transitions. [2023-08-04 02:22:33,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 245 flow [2023-08-04 02:22:33,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 241 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:22:33,176 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 127 flow [2023-08-04 02:22:33,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-04 02:22:33,177 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2023-08-04 02:22:33,177 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 127 flow [2023-08-04 02:22:33,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:33,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:33,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:22:33,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 02:22:33,382 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 [2023-08-04 02:22:33,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:22:33,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:33,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1823441839, now seen corresponding path program 1 times [2023-08-04 02:22:33,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:33,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935599229] [2023-08-04 02:22:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:33,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:22:33,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:33,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935599229] [2023-08-04 02:22:33,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935599229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:22:33,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107262854] [2023-08-04 02:22:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:22:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:22:33,456 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) [2023-08-04 02:22:33,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:22:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:33,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:22:33,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:22:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:22:33,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:22:33,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107262854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:22:33,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:22:33,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:22:33,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200033080] [2023-08-04 02:22:33,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:22:33,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:22:33,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:22:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:22:33,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 336 [2023-08-04 02:22:33,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:33,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:33,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 336 [2023-08-04 02:22:33,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:34,452 INFO L124 PetriNetUnfolderBase]: 15040/18043 cut-off events. [2023-08-04 02:22:34,452 INFO L125 PetriNetUnfolderBase]: For 753/753 co-relation queries the response was YES. [2023-08-04 02:22:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36666 conditions, 18043 events. 15040/18043 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 65400 event pairs, 703 based on Foata normal form. 729/10888 useless extension candidates. Maximal degree in co-relation 14868. Up to 7614 conditions per place. [2023-08-04 02:22:34,493 INFO L140 encePairwiseOnDemand]: 333/336 looper letters, 0 selfloop transitions, 0 changer transitions 70/70 dead transitions. [2023-08-04 02:22:34,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 309 flow [2023-08-04 02:22:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:22:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:22:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 820 transitions. [2023-08-04 02:22:34,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2023-08-04 02:22:34,506 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 820 transitions. [2023-08-04 02:22:34,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 820 transitions. [2023-08-04 02:22:34,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:22:34,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 820 transitions. [2023-08-04 02:22:34,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:34,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:34,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 336.0) internal successors, (2016), 6 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:34,540 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 127 flow. Second operand 5 states and 820 transitions. [2023-08-04 02:22:34,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 309 flow [2023-08-04 02:22:34,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:22:34,568 INFO L231 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2023-08-04 02:22:34,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2023-08-04 02:22:34,575 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2023-08-04 02:22:34,575 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2023-08-04 02:22:34,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:34,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:22:34,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:22:34,597 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:22:34,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 02:22:34,802 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 [2023-08-04 02:22:34,802 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:22:34,803 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:22:34,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 02:22:35,079 INFO L124 PetriNetUnfolderBase]: 886/4110 cut-off events. [2023-08-04 02:22:35,079 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:22:35,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 4110 events. 886/4110 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33172 event pairs, 33 based on Foata normal form. 0/3468 useless extension candidates. Maximal degree in co-relation 2415. Up to 192 conditions per place. [2023-08-04 02:22:35,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 02:22:35,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 195 transitions, 480 flow [2023-08-04 02:22:35,117 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:22:35,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 195 transitions, 480 flow [2023-08-04 02:22:35,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 195 transitions, 480 flow [2023-08-04 02:22:35,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 195 transitions, 480 flow [2023-08-04 02:22:35,412 INFO L124 PetriNetUnfolderBase]: 886/4110 cut-off events. [2023-08-04 02:22:35,412 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:22:35,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 4110 events. 886/4110 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33172 event pairs, 33 based on Foata normal form. 0/3468 useless extension candidates. Maximal degree in co-relation 2415. Up to 192 conditions per place. [2023-08-04 02:22:35,491 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 02:22:38,392 INFO L134 LiptonReduction]: Checked pairs total: 24285 [2023-08-04 02:22:38,393 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-04 02:22:38,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:22:38,394 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;@7651124, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:22:38,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:22:38,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:22:38,397 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2023-08-04 02:22:38,397 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:22:38,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:22:38,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:22:38,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:22:38,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:22:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1804467527, now seen corresponding path program 1 times [2023-08-04 02:22:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:22:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120382323] [2023-08-04 02:22:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:22:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:22:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:22:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:22:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:22:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120382323] [2023-08-04 02:22:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120382323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:22:38,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:22:38,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:22:38,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543174251] [2023-08-04 02:22:38,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:22:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:22:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:22:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:22:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:22:38,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 02:22:38,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 71 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:22:38,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:22:38,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 02:22:38,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:22:58,212 INFO L124 PetriNetUnfolderBase]: 282558/337063 cut-off events. [2023-08-04 02:22:58,212 INFO L125 PetriNetUnfolderBase]: For 35938/35938 co-relation queries the response was YES. [2023-08-04 02:22:58,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685339 conditions, 337063 events. 282558/337063 cut-off events. For 35938/35938 co-relation queries the response was YES. Maximal size of possible extension queue 6319. Compared 1585002 event pairs, 121223 based on Foata normal form. 0/188806 useless extension candidates. Maximal degree in co-relation 224681. Up to 327391 conditions per place. [2023-08-04 02:23:00,068 INFO L140 encePairwiseOnDemand]: 332/336 looper letters, 57 selfloop transitions, 2 changer transitions 3/74 dead transitions. [2023-08-04 02:23:00,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 356 flow [2023-08-04 02:23:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:23:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:23:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-08-04 02:23:00,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2023-08-04 02:23:00,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-08-04 02:23:00,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-08-04 02:23:00,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:23:00,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-08-04 02:23:00,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:23:00,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:23:00,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 336.0) internal successors, (1344), 4 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:23:00,072 INFO L175 Difference]: Start difference. First operand has 60 places, 71 transitions, 232 flow. Second operand 3 states and 520 transitions. [2023-08-04 02:23:00,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 356 flow [2023-08-04 02:23:00,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:23:00,095 INFO L231 Difference]: Finished difference. Result has 62 places, 68 transitions, 224 flow [2023-08-04 02:23:00,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=336, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=62, PETRI_TRANSITIONS=68} [2023-08-04 02:23:00,096 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-08-04 02:23:00,096 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 68 transitions, 224 flow [2023-08-04 02:23:00,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:23:00,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:23:00,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:23:00,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:23:00,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:23:00,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:23:00,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2125459655, now seen corresponding path program 1 times [2023-08-04 02:23:00,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:23:00,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228884772] [2023-08-04 02:23:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:23:00,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:23:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:23:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:23:00,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:23:00,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228884772] [2023-08-04 02:23:00,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228884772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:23:00,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501311428] [2023-08-04 02:23:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:23:00,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:23:00,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:23:00,143 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) [2023-08-04 02:23:00,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:23:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:23:00,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:23:00,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:23:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:23:00,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:23:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501311428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:23:00,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:23:00,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:23:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932764458] [2023-08-04 02:23:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:23:00,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:23:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:23:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:23:00,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:23:00,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 336 [2023-08-04 02:23:00,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 68 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:23:00,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:23:00,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 336 [2023-08-04 02:23:00,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand