/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:38:29,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:38:29,374 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:38:29,411 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:38:29,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:38:29,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:38:29,414 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:38:29,414 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:38:29,414 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:38:29,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:38:29,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:38:29,419 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:38:29,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:38:29,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:38:29,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:38:29,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:38:29,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:38:29,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:38:29,421 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:38:29,421 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:38:29,422 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:38:29,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:38:29,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:38:29,423 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:38:29,423 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:38:29,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:38:29,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:38:29,424 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:38:29,424 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:38:29,425 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:38:29,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:38:29,426 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:38:29,426 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:38:29,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:38:29,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:38:29,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:38:29,689 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:38:29,689 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:38:29,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-11-17 11:38:30,892 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:38:31,151 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:38:31,152 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-11-17 11:38:31,170 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fb15bc5d/595540e09c2e464a81d4b28c8881a679/FLAG871ad0231 [2023-11-17 11:38:31,181 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fb15bc5d/595540e09c2e464a81d4b28c8881a679 [2023-11-17 11:38:31,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:38:31,184 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:38:31,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:38:31,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:38:31,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:38:31,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c79687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31, skipping insertion in model container [2023-11-17 11:38:31,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:38:31,556 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2023-11-17 11:38:31,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:38:31,598 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:38:31,644 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2023-11-17 11:38:31,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:38:31,702 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:38:31,708 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:38:31,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31 WrapperNode [2023-11-17 11:38:31,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:38:31,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:38:31,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:38:31,712 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:38:31,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,744 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,777 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2023-11-17 11:38:31,777 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:38:31,778 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:38:31,778 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:38:31,778 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:38:31,786 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,789 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,809 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:38:31,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:38:31,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:38:31,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:38:31,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (1/1) ... [2023-11-17 11:38:31,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:38:31,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:38:31,858 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) [2023-11-17 11:38:31,871 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 [2023-11-17 11:38:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:38:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:38:31,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:38:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:38:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:38:31,892 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:38:31,893 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:38:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:38:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:38:31,894 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:38:31,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:38:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:38:31,896 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:38:32,069 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:38:32,071 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:38:32,366 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:38:32,514 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:38:32,514 INFO L307 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-17 11:38:32,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:38:32 BoogieIcfgContainer [2023-11-17 11:38:32,516 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:38:32,518 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:38:32,518 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:38:32,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:38:32,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:38:31" (1/3) ... [2023-11-17 11:38:32,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb2ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:38:32, skipping insertion in model container [2023-11-17 11:38:32,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:31" (2/3) ... [2023-11-17 11:38:32,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb2ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:38:32, skipping insertion in model container [2023-11-17 11:38:32,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:38:32" (3/3) ... [2023-11-17 11:38:32,524 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-11-17 11:38:32,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:38:32,541 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:38:32,541 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:38:32,573 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:38:32,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 54 transitions, 115 flow [2023-11-17 11:38:32,633 INFO L124 PetriNetUnfolderBase]: 20/85 cut-off events. [2023-11-17 11:38:32,634 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:38:32,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 20/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 269 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-11-17 11:38:32,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 54 transitions, 115 flow [2023-11-17 11:38:32,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 52 transitions, 108 flow [2023-11-17 11:38:32,646 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:32,657 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 52 transitions, 108 flow [2023-11-17 11:38:32,660 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 52 transitions, 108 flow [2023-11-17 11:38:32,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 52 transitions, 108 flow [2023-11-17 11:38:32,694 INFO L124 PetriNetUnfolderBase]: 19/83 cut-off events. [2023-11-17 11:38:32,694 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:32,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 19/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 253 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-11-17 11:38:32,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 1122 [2023-11-17 11:38:33,583 INFO L134 LiptonReduction]: Checked pairs total: 2676 [2023-11-17 11:38:33,583 INFO L136 LiptonReduction]: Total number of compositions: 41 [2023-11-17 11:38:33,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:33,603 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@77eaad97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:33,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:38:33,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:33,609 INFO L124 PetriNetUnfolderBase]: 9/28 cut-off events. [2023-11-17 11:38:33,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:33,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:33,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:38:33,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:38:33,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:33,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2391325, now seen corresponding path program 1 times [2023-11-17 11:38:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:33,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846157045] [2023-11-17 11:38:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:33,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:33,771 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:33,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:33,832 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:33,833 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:38:33,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:38:33,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:38:33,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:38:33,835 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:38:33,843 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:33,843 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:38:33,866 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:38:33,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:33,942 INFO L124 PetriNetUnfolderBase]: 33/142 cut-off events. [2023-11-17 11:38:33,942 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-17 11:38:33,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 142 events. 33/142 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 577 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 89. Up to 9 conditions per place. [2023-11-17 11:38:33,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:33,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:33,945 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:33,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:33,945 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:33,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 73 transitions, 162 flow [2023-11-17 11:38:33,960 INFO L124 PetriNetUnfolderBase]: 33/142 cut-off events. [2023-11-17 11:38:33,961 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-17 11:38:33,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 142 events. 33/142 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 577 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 89. Up to 9 conditions per place. [2023-11-17 11:38:33,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 2992 [2023-11-17 11:38:34,825 INFO L134 LiptonReduction]: Checked pairs total: 7614 [2023-11-17 11:38:34,825 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-11-17 11:38:34,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:34,834 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@77eaad97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:34,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:38:34,845 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:34,845 INFO L124 PetriNetUnfolderBase]: 11/35 cut-off events. [2023-11-17 11:38:34,846 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:38:34,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:34,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:38:34,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:38:34,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash -924274781, now seen corresponding path program 1 times [2023-11-17 11:38:34,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:34,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399276832] [2023-11-17 11:38:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:34,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:38:35,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:35,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399276832] [2023-11-17 11:38:35,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399276832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:35,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:35,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:38:35,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449803841] [2023-11-17 11:38:35,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:35,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:35,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:35,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 127 [2023-11-17 11:38:35,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 46 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:35,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:35,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 127 [2023-11-17 11:38:35,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:35,541 INFO L124 PetriNetUnfolderBase]: 2025/3390 cut-off events. [2023-11-17 11:38:35,541 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-17 11:38:35,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6775 conditions, 3390 events. 2025/3390 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 17608 event pairs, 856 based on Foata normal form. 106/2950 useless extension candidates. Maximal degree in co-relation 4289. Up to 1665 conditions per place. [2023-11-17 11:38:35,561 INFO L140 encePairwiseOnDemand]: 109/127 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-17 11:38:35,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 60 transitions, 258 flow [2023-11-17 11:38:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-17 11:38:35,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884514435695538 [2023-11-17 11:38:35,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-17 11:38:35,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-17 11:38:35,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:35,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-17 11:38:35,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:35,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:35,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:35,583 INFO L175 Difference]: Start difference. First operand has 36 places, 46 transitions, 108 flow. Second operand 3 states and 148 transitions. [2023-11-17 11:38:35,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 60 transitions, 258 flow [2023-11-17 11:38:35,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 60 transitions, 258 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:35,590 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 126 flow [2023-11-17 11:38:35,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-11-17 11:38:35,595 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-17 11:38:35,595 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 126 flow [2023-11-17 11:38:35,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:35,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:35,595 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:38:35,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:38:35,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:38:35,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1922598879, now seen corresponding path program 1 times [2023-11-17 11:38:35,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:35,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444637158] [2023-11-17 11:38:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:35,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:35,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:35,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:35,639 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:35,640 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:38:35,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:38:35,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:38:35,640 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:38:35,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:38:35,641 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:38:35,641 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:35,641 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:38:35,662 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:38:35,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:35,689 INFO L124 PetriNetUnfolderBase]: 49/210 cut-off events. [2023-11-17 11:38:35,689 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-17 11:38:35,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 210 events. 49/210 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 928 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 153. Up to 12 conditions per place. [2023-11-17 11:38:35,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:35,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:35,694 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:35,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:35,694 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:35,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 92 transitions, 211 flow [2023-11-17 11:38:35,714 INFO L124 PetriNetUnfolderBase]: 49/210 cut-off events. [2023-11-17 11:38:35,714 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-17 11:38:35,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 210 events. 49/210 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 928 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 153. Up to 12 conditions per place. [2023-11-17 11:38:35,720 INFO L119 LiptonReduction]: Number of co-enabled transitions 5508 [2023-11-17 11:38:36,807 INFO L134 LiptonReduction]: Checked pairs total: 13869 [2023-11-17 11:38:36,807 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-11-17 11:38:36,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:36,811 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@77eaad97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:36,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:38:36,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:36,815 INFO L124 PetriNetUnfolderBase]: 9/30 cut-off events. [2023-11-17 11:38:36,815 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:38:36,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:36,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:38:36,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:38:36,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:36,816 INFO L85 PathProgramCache]: Analyzing trace with hash -899508634, now seen corresponding path program 1 times [2023-11-17 11:38:36,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:36,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621490444] [2023-11-17 11:38:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:36,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:38:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621490444] [2023-11-17 11:38:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621490444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:36,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:36,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:38:36,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862592561] [2023-11-17 11:38:36,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:36,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:36,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:36,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 162 [2023-11-17 11:38:36,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:36,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:36,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 162 [2023-11-17 11:38:36,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:39,534 INFO L124 PetriNetUnfolderBase]: 21845/31724 cut-off events. [2023-11-17 11:38:39,534 INFO L125 PetriNetUnfolderBase]: For 838/838 co-relation queries the response was YES. [2023-11-17 11:38:39,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63636 conditions, 31724 events. 21845/31724 cut-off events. For 838/838 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 191094 event pairs, 9906 based on Foata normal form. 734/27854 useless extension candidates. Maximal degree in co-relation 12097. Up to 16171 conditions per place. [2023-11-17 11:38:39,710 INFO L140 encePairwiseOnDemand]: 140/162 looper letters, 67 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-17 11:38:39,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 328 flow [2023-11-17 11:38:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2023-11-17 11:38:39,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39094650205761317 [2023-11-17 11:38:39,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2023-11-17 11:38:39,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2023-11-17 11:38:39,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:39,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2023-11-17 11:38:39,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:39,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:39,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:39,723 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 141 flow. Second operand 3 states and 190 transitions. [2023-11-17 11:38:39,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 328 flow [2023-11-17 11:38:39,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:39,731 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 155 flow [2023-11-17 11:38:39,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-11-17 11:38:39,732 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-11-17 11:38:39,732 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 155 flow [2023-11-17 11:38:39,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:39,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:39,733 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:38:39,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:38:39,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:38:39,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1310524958, now seen corresponding path program 1 times [2023-11-17 11:38:39,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:39,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494345308] [2023-11-17 11:38:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:39,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:39,757 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:39,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:39,786 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:39,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:38:39,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:38:39,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:38:39,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:38:39,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:38:39,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:38:39,790 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:38:39,790 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:39,790 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:38:39,820 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:38:39,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:39,846 INFO L124 PetriNetUnfolderBase]: 73/302 cut-off events. [2023-11-17 11:38:39,847 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2023-11-17 11:38:39,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 302 events. 73/302 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1418 event pairs, 6 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 234. Up to 32 conditions per place. [2023-11-17 11:38:39,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:39,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:39,851 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:39,852 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:39,852 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:39,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 111 transitions, 262 flow [2023-11-17 11:38:39,873 INFO L124 PetriNetUnfolderBase]: 73/302 cut-off events. [2023-11-17 11:38:39,873 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2023-11-17 11:38:39,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 302 events. 73/302 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1418 event pairs, 6 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 234. Up to 32 conditions per place. [2023-11-17 11:38:39,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 8704 [2023-11-17 11:38:41,154 INFO L134 LiptonReduction]: Checked pairs total: 19846 [2023-11-17 11:38:41,154 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-11-17 11:38:41,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:41,157 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@77eaad97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:41,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:38:41,160 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:41,160 INFO L124 PetriNetUnfolderBase]: 8/27 cut-off events. [2023-11-17 11:38:41,160 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:38:41,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:41,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:38:41,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:38:41,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:41,167 INFO L85 PathProgramCache]: Analyzing trace with hash 160651023, now seen corresponding path program 1 times [2023-11-17 11:38:41,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:41,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166539972] [2023-11-17 11:38:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:41,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:38:41,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:41,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166539972] [2023-11-17 11:38:41,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166539972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:41,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:41,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:38:41,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197498383] [2023-11-17 11:38:41,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:41,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:41,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:41,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 195 [2023-11-17 11:38:41,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 69 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:41,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:41,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 195 [2023-11-17 11:38:41,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:58,998 INFO L124 PetriNetUnfolderBase]: 210859/282361 cut-off events. [2023-11-17 11:38:58,998 INFO L125 PetriNetUnfolderBase]: For 9373/9373 co-relation queries the response was YES. [2023-11-17 11:38:59,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567763 conditions, 282361 events. 210859/282361 cut-off events. For 9373/9373 co-relation queries the response was YES. Maximal size of possible extension queue 4941. Compared 1843799 event pairs, 98554 based on Foata normal form. 5073/249032 useless extension candidates. Maximal degree in co-relation 63631. Up to 148901 conditions per place. [2023-11-17 11:39:00,548 INFO L140 encePairwiseOnDemand]: 168/195 looper letters, 81 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2023-11-17 11:39:00,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 400 flow [2023-11-17 11:39:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-11-17 11:39:00,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 11:39:00,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-11-17 11:39:00,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-11-17 11:39:00,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:00,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-11-17 11:39:00,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:00,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:00,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:00,553 INFO L175 Difference]: Start difference. First operand has 54 places, 69 transitions, 178 flow. Second operand 3 states and 234 transitions. [2023-11-17 11:39:00,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 400 flow [2023-11-17 11:39:00,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:39:00,563 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 186 flow [2023-11-17 11:39:00,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2023-11-17 11:39:00,564 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-11-17 11:39:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 186 flow [2023-11-17 11:39:00,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:00,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:00,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:00,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:39:00,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:39:00,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash 331315283, now seen corresponding path program 1 times [2023-11-17 11:39:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739223822] [2023-11-17 11:39:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:00,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:00,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:00,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739223822] [2023-11-17 11:39:00,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739223822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:39:00,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633952078] [2023-11-17 11:39:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:00,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:00,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:00,617 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) [2023-11-17 11:39:00,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:39:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:00,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:39:00,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:39:00,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-17 11:39:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:00,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:39:00,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633952078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:00,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:39:00,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-17 11:39:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015509486] [2023-11-17 11:39:00,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:00,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:39:00,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 195 [2023-11-17 11:39:00,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:00,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:00,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 195 [2023-11-17 11:39:00,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:32,926 INFO L124 PetriNetUnfolderBase]: 330195/452540 cut-off events. [2023-11-17 11:39:32,926 INFO L125 PetriNetUnfolderBase]: For 108846/108846 co-relation queries the response was YES. [2023-11-17 11:39:34,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1018552 conditions, 452540 events. 330195/452540 cut-off events. For 108846/108846 co-relation queries the response was YES. Maximal size of possible extension queue 8788. Compared 3345005 event pairs, 116049 based on Foata normal form. 27949/451832 useless extension candidates. Maximal degree in co-relation 437282. Up to 285868 conditions per place. [2023-11-17 11:39:36,535 INFO L140 encePairwiseOnDemand]: 179/195 looper letters, 83 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2023-11-17 11:39:36,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 101 transitions, 541 flow [2023-11-17 11:39:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-11-17 11:39:36,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487179487179487 [2023-11-17 11:39:36,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-11-17 11:39:36,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-11-17 11:39:36,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:36,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-11-17 11:39:36,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:36,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:36,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:36,571 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 186 flow. Second operand 3 states and 204 transitions. [2023-11-17 11:39:36,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 101 transitions, 541 flow [2023-11-17 11:39:44,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 101 transitions, 523 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:39:44,236 INFO L231 Difference]: Finished difference. Result has 59 places, 66 transitions, 268 flow [2023-11-17 11:39:44,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=59, PETRI_TRANSITIONS=66} [2023-11-17 11:39:44,237 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2023-11-17 11:39:44,237 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 66 transitions, 268 flow [2023-11-17 11:39:44,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:44,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:44,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:44,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:39:44,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:44,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:39:44,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:44,440 INFO L85 PathProgramCache]: Analyzing trace with hash 886490199, now seen corresponding path program 1 times [2023-11-17 11:39:44,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:44,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082473772] [2023-11-17 11:39:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:44,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:44,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:44,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082473772] [2023-11-17 11:39:44,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082473772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:39:44,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949391783] [2023-11-17 11:39:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:44,514 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) [2023-11-17 11:39:44,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:39:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:44,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:39:44,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:39:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:44,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:39:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:44,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949391783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:39:44,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:39:44,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:39:44,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308947625] [2023-11-17 11:39:44,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:39:44,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:39:44,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:39:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:39:44,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 195 [2023-11-17 11:39:44,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:44,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:44,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 195 [2023-11-17 11:39:44,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:15,560 INFO L124 PetriNetUnfolderBase]: 308397/423237 cut-off events. [2023-11-17 11:40:15,561 INFO L125 PetriNetUnfolderBase]: For 190670/190670 co-relation queries the response was YES. [2023-11-17 11:40:16,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182355 conditions, 423237 events. 308397/423237 cut-off events. For 190670/190670 co-relation queries the response was YES. Maximal size of possible extension queue 8023. Compared 3079792 event pairs, 134087 based on Foata normal form. 0/383710 useless extension candidates. Maximal degree in co-relation 446648. Up to 411855 conditions per place. [2023-11-17 11:40:18,212 INFO L140 encePairwiseOnDemand]: 191/195 looper letters, 133 selfloop transitions, 6 changer transitions 0/141 dead transitions. [2023-11-17 11:40:18,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 141 transitions, 831 flow [2023-11-17 11:40:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:40:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:40:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 326 transitions. [2023-11-17 11:40:18,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27863247863247864 [2023-11-17 11:40:18,214 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 326 transitions. [2023-11-17 11:40:18,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 326 transitions. [2023-11-17 11:40:18,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:18,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 326 transitions. [2023-11-17 11:40:18,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:18,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:18,219 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:18,219 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 268 flow. Second operand 6 states and 326 transitions. [2023-11-17 11:40:18,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 141 transitions, 831 flow [2023-11-17 11:40:18,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 141 transitions, 786 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:40:18,333 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 294 flow [2023-11-17 11:40:18,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-11-17 11:40:18,333 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-11-17 11:40:18,333 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 294 flow [2023-11-17 11:40:18,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:18,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:18,334 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:18,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:40:18,534 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,SelfDestructingSolverStorable7 [2023-11-17 11:40:18,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:40:18,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1497553239, now seen corresponding path program 1 times [2023-11-17 11:40:18,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:18,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916685438] [2023-11-17 11:40:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:18,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:18,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:18,577 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:18,577 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:40:18,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:40:18,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:40:18,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:40:18,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:40:18,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:40:18,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:40:18,579 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:40:18,580 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:18,580 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:40:18,607 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 11:40:18,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 130 transitions, 315 flow [2023-11-17 11:40:18,642 INFO L124 PetriNetUnfolderBase]: 117/446 cut-off events. [2023-11-17 11:40:18,642 INFO L125 PetriNetUnfolderBase]: For 110/115 co-relation queries the response was YES. [2023-11-17 11:40:18,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 446 events. 117/446 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2258 event pairs, 23 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 352. Up to 80 conditions per place. [2023-11-17 11:40:18,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 130 transitions, 315 flow [2023-11-17 11:40:18,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 130 transitions, 315 flow [2023-11-17 11:40:18,648 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:18,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 130 transitions, 315 flow [2023-11-17 11:40:18,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 130 transitions, 315 flow [2023-11-17 11:40:18,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 130 transitions, 315 flow [2023-11-17 11:40:18,681 INFO L124 PetriNetUnfolderBase]: 117/446 cut-off events. [2023-11-17 11:40:18,681 INFO L125 PetriNetUnfolderBase]: For 110/115 co-relation queries the response was YES. [2023-11-17 11:40:18,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 446 events. 117/446 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2258 event pairs, 23 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 352. Up to 80 conditions per place. [2023-11-17 11:40:18,701 INFO L119 LiptonReduction]: Number of co-enabled transitions 12580 [2023-11-17 11:40:20,168 INFO L134 LiptonReduction]: Checked pairs total: 29241 [2023-11-17 11:40:20,168 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-11-17 11:40:20,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:20,172 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@77eaad97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:20,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:40:20,174 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:20,175 INFO L124 PetriNetUnfolderBase]: 12/37 cut-off events. [2023-11-17 11:40:20,175 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:20,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:20,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:40:20,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:40:20,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:20,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2097874788, now seen corresponding path program 1 times [2023-11-17 11:40:20,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:20,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333444954] [2023-11-17 11:40:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:40:20,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333444954] [2023-11-17 11:40:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333444954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:20,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:20,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:40:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802796383] [2023-11-17 11:40:20,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:20,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 231 [2023-11-17 11:40:20,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 80 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:20,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:20,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 231 [2023-11-17 11:40:20,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand