/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_51-mutexptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:40:30,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:40:30,907 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 11:40:30,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:40:30,943 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:40:30,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:40:30,944 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:40:30,944 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:40:30,945 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:40:30,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:40:30,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:40:30,949 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:40:30,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:40:30,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:40:30,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:40:30,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:40:30,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:40:30,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:40:30,952 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:40:30,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:40:30,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:40:30,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:40:30,954 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:40:30,954 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:40:30,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:40:30,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:30,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:40:30,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:40:30,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:40:30,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:40:30,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:40:30,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:40:30,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:40:31,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:40:31,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:40:31,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:40:31,265 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:40:31,266 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:40:31,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-11-17 11:40:32,480 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:40:32,725 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:40:32,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-11-17 11:40:32,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/631503579/dac5777b1c574f66877ad3b72a4af31c/FLAGf415bff9d [2023-11-17 11:40:32,754 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/631503579/dac5777b1c574f66877ad3b72a4af31c [2023-11-17 11:40:32,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:40:32,758 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:40:32,759 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:32,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:40:32,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:40:32,765 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:32" (1/1) ... [2023-11-17 11:40:32,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a0abf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:32, skipping insertion in model container [2023-11-17 11:40:32,766 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:32" (1/1) ... [2023-11-17 11:40:32,814 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:40:33,110 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_51-mutexptr_racefree.i[30176,30189] [2023-11-17 11:40:33,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:33,154 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:40:33,192 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_51-mutexptr_racefree.i[30176,30189] [2023-11-17 11:40:33,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:33,246 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:40:33,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33 WrapperNode [2023-11-17 11:40:33,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:33,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:33,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:40:33,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:40:33,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,283 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,308 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2023-11-17 11:40:33,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:33,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:40:33,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:40:33,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:40:33,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,328 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:40:33,345 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:40:33,345 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:40:33,346 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:40:33,346 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (1/1) ... [2023-11-17 11:40:33,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:33,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:33,380 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 11:40:33,396 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 11:40:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:40:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:40:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:40:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:40:33,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:40:33,421 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:40:33,421 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:40:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:40:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:40:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:40:33,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:40:33,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:40:33,423 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 11:40:33,612 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:40:33,614 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:40:33,899 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:40:34,077 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:40:34,078 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 11:40:34,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:34 BoogieIcfgContainer [2023-11-17 11:40:34,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:40:34,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:40:34,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:40:34,085 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:40:34,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:40:32" (1/3) ... [2023-11-17 11:40:34,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359d15a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:34, skipping insertion in model container [2023-11-17 11:40:34,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:33" (2/3) ... [2023-11-17 11:40:34,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359d15a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:34, skipping insertion in model container [2023-11-17 11:40:34,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:34" (3/3) ... [2023-11-17 11:40:34,087 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-11-17 11:40:34,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:40:34,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:40:34,132 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:40:34,189 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:40:34,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 105 flow [2023-11-17 11:40:34,257 INFO L124 PetriNetUnfolderBase]: 13/69 cut-off events. [2023-11-17 11:40:34,257 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:34,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 69 events. 13/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 222 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2023-11-17 11:40:34,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 49 transitions, 105 flow [2023-11-17 11:40:34,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 47 transitions, 98 flow [2023-11-17 11:40:34,269 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:34,280 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 47 transitions, 98 flow [2023-11-17 11:40:34,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 47 transitions, 98 flow [2023-11-17 11:40:34,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 47 transitions, 98 flow [2023-11-17 11:40:34,296 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2023-11-17 11:40:34,297 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:34,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 67 events. 12/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 214 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2023-11-17 11:40:34,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 1012 [2023-11-17 11:40:34,923 INFO L134 LiptonReduction]: Checked pairs total: 2187 [2023-11-17 11:40:34,923 INFO L136 LiptonReduction]: Total number of compositions: 33 [2023-11-17 11:40:34,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:34,953 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;@81c688f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:34,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:40:34,961 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:34,962 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:40:34,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:34,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:34,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:40:34,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:34,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash 11626309, now seen corresponding path program 1 times [2023-11-17 11:40:34,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:34,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029979560] [2023-11-17 11:40:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:35,201 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 11:40:35,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:35,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029979560] [2023-11-17 11:40:35,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029979560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:35,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:35,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14274173] [2023-11-17 11:40:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:35,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:35,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:35,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 82 [2023-11-17 11:40:35,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 11:40:35,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:35,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 82 [2023-11-17 11:40:35,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:35,355 INFO L124 PetriNetUnfolderBase]: 72/174 cut-off events. [2023-11-17 11:40:35,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:35,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 707 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2023-11-17 11:40:35,360 INFO L140 encePairwiseOnDemand]: 69/82 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 11:40:35,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 120 flow [2023-11-17 11:40:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-17 11:40:35,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2023-11-17 11:40:35,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-17 11:40:35,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-17 11:40:35,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:35,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-17 11:40:35,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 11:40:35,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:35,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:35,391 INFO L175 Difference]: Start difference. First operand has 25 places, 31 transitions, 66 flow. Second operand 3 states and 87 transitions. [2023-11-17 11:40:35,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 120 flow [2023-11-17 11:40:35,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:35,397 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-17 11:40:35,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-17 11:40:35,403 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 11:40:35,404 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-17 11:40:35,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 11:40:35,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:35,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:40:35,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:40:35,405 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:35,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1779874303, now seen corresponding path program 1 times [2023-11-17 11:40:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:35,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409843089] [2023-11-17 11:40:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:35,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:35,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:35,522 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:35,523 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:35,525 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:40:35,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:40:35,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:40:35,527 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:40:35,531 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:35,531 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:40:35,555 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:40:35,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:40:35,580 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2023-11-17 11:40:35,581 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:40:35,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 489 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-17 11:40:35,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:40:35,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 74 transitions, 164 flow [2023-11-17 11:40:35,584 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:35,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 74 transitions, 164 flow [2023-11-17 11:40:35,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 74 transitions, 164 flow [2023-11-17 11:40:35,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:40:35,618 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2023-11-17 11:40:35,618 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:40:35,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 489 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-17 11:40:35,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-11-17 11:40:36,488 INFO L134 LiptonReduction]: Checked pairs total: 8195 [2023-11-17 11:40:36,489 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-11-17 11:40:36,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:36,492 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;@81c688f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:36,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:40:36,495 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:36,495 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:40:36,495 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:36,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:36,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:40:36,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:36,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash 14948104, now seen corresponding path program 1 times [2023-11-17 11:40:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705545679] [2023-11-17 11:40:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:36,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:36,551 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 11:40:36,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:36,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705545679] [2023-11-17 11:40:36,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705545679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:36,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:36,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:36,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168737809] [2023-11-17 11:40:36,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:36,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:36,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:36,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:36,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:36,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 124 [2023-11-17 11:40:36,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 50 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 11:40:36,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:36,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 124 [2023-11-17 11:40:36,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:36,907 INFO L124 PetriNetUnfolderBase]: 1642/2696 cut-off events. [2023-11-17 11:40:36,907 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-17 11:40:36,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 2696 events. 1642/2696 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 13425 event pairs, 1515 based on Foata normal form. 214/2626 useless extension candidates. Maximal degree in co-relation 4382. Up to 2673 conditions per place. [2023-11-17 11:40:36,920 INFO L140 encePairwiseOnDemand]: 106/124 looper letters, 32 selfloop transitions, 2 changer transitions 8/45 dead transitions. [2023-11-17 11:40:36,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 190 flow [2023-11-17 11:40:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-17 11:40:36,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2023-11-17 11:40:36,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-17 11:40:36,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-17 11:40:36,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:36,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-17 11:40:36,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 11:40:36,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 11:40:36,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 11:40:36,926 INFO L175 Difference]: Start difference. First operand has 38 places, 50 transitions, 116 flow. Second operand 3 states and 127 transitions. [2023-11-17 11:40:36,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 190 flow [2023-11-17 11:40:36,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:36,928 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 76 flow [2023-11-17 11:40:36,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-11-17 11:40:36,929 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-17 11:40:36,929 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 76 flow [2023-11-17 11:40:36,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 11:40:36,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:36,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:36,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:40:36,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:36,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash 23887162, now seen corresponding path program 1 times [2023-11-17 11:40:36,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:36,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419888491] [2023-11-17 11:40:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:36,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:37,004 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 11:40:37,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:37,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419888491] [2023-11-17 11:40:37,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419888491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:40:37,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020451400] [2023-11-17 11:40:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:37,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:37,009 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 11:40:37,033 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 11:40:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:37,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:40:37,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:40:37,188 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 11:40:37,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:40:37,206 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 11:40:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020451400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:40:37,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:40:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:40:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127055228] [2023-11-17 11:40:37,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:40:37,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:40:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:40:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:40:37,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 124 [2023-11-17 11:40:37,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 11:40:37,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:37,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 124 [2023-11-17 11:40:37,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:37,374 INFO L124 PetriNetUnfolderBase]: 376/676 cut-off events. [2023-11-17 11:40:37,374 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-17 11:40:37,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 676 events. 376/676 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2796 event pairs, 63 based on Foata normal form. 90/766 useless extension candidates. Maximal degree in co-relation 162. Up to 450 conditions per place. [2023-11-17 11:40:37,379 INFO L140 encePairwiseOnDemand]: 121/124 looper letters, 45 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-17 11:40:37,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 216 flow [2023-11-17 11:40:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:40:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:40:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2023-11-17 11:40:37,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25 [2023-11-17 11:40:37,384 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 155 transitions. [2023-11-17 11:40:37,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 155 transitions. [2023-11-17 11:40:37,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:37,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 155 transitions. [2023-11-17 11:40:37,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 11:40:37,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 11:40:37,389 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 11:40:37,389 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 76 flow. Second operand 5 states and 155 transitions. [2023-11-17 11:40:37,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 216 flow [2023-11-17 11:40:37,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:40:37,392 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2023-11-17 11:40:37,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-11-17 11:40:37,395 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-17 11:40:37,395 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2023-11-17 11:40:37,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 11:40:37,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:37,395 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:40:37,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:40:37,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:37,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:37,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1386770642, now seen corresponding path program 1 times [2023-11-17 11:40:37,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:37,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193823690] [2023-11-17 11:40:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:37,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:37,631 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:37,654 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:37,654 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:37,655 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:40:37,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:40:37,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:40:37,655 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:40:37,657 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:37,657 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:40:37,694 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:40:37,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:40:37,717 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2023-11-17 11:40:37,717 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:40:37,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 804 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2023-11-17 11:40:37,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:40:37,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 99 transitions, 225 flow [2023-11-17 11:40:37,725 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:37,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 99 transitions, 225 flow [2023-11-17 11:40:37,730 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 99 transitions, 225 flow [2023-11-17 11:40:37,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:40:37,746 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2023-11-17 11:40:37,746 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:40:37,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 804 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2023-11-17 11:40:37,753 INFO L119 LiptonReduction]: Number of co-enabled transitions 6762 [2023-11-17 11:40:38,809 INFO L134 LiptonReduction]: Checked pairs total: 17325 [2023-11-17 11:40:38,809 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-11-17 11:40:38,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:38,812 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;@81c688f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:38,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:40:38,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:38,814 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:40:38,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:38,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:38,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:40:38,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:38,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash 19562825, now seen corresponding path program 1 times [2023-11-17 11:40:38,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:38,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348480068] [2023-11-17 11:40:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:38,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:38,872 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 11:40:38,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348480068] [2023-11-17 11:40:38,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348480068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:38,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:38,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:38,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636034341] [2023-11-17 11:40:38,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:38,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:38,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:38,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:38,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 164 [2023-11-17 11:40:38,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 67 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 11:40:38,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:38,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 164 [2023-11-17 11:40:38,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:42,046 INFO L124 PetriNetUnfolderBase]: 23815/33821 cut-off events. [2023-11-17 11:40:42,046 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2023-11-17 11:40:42,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68119 conditions, 33821 events. 23815/33821 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 197936 event pairs, 22652 based on Foata normal form. 3053/34115 useless extension candidates. Maximal degree in co-relation 26594. Up to 33630 conditions per place. [2023-11-17 11:40:42,213 INFO L140 encePairwiseOnDemand]: 140/164 looper letters, 41 selfloop transitions, 2 changer transitions 9/56 dead transitions. [2023-11-17 11:40:42,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 243 flow [2023-11-17 11:40:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-17 11:40:42,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:40:42,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-17 11:40:42,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-17 11:40:42,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:42,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-17 11:40:42,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 11:40:42,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 11:40:42,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 11:40:42,219 INFO L175 Difference]: Start difference. First operand has 50 places, 67 transitions, 161 flow. Second operand 3 states and 164 transitions. [2023-11-17 11:40:42,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 243 flow [2023-11-17 11:40:42,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:42,223 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 104 flow [2023-11-17 11:40:42,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-11-17 11:40:42,226 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-17 11:40:42,226 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 104 flow [2023-11-17 11:40:42,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 11:40:42,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:42,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:42,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:40:42,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:42,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash -747814009, now seen corresponding path program 1 times [2023-11-17 11:40:42,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:42,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364886374] [2023-11-17 11:40:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:42,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:42,282 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 11:40:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:42,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364886374] [2023-11-17 11:40:42,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364886374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:40:42,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433060707] [2023-11-17 11:40:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:42,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:42,285 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 11:40:42,308 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 11:40:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:42,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:40:42,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:40:42,401 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 11:40:42,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:40:42,417 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 11:40:42,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433060707] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:40:42,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:40:42,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:40:42,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201254056] [2023-11-17 11:40:42,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:40:42,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:40:42,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:40:42,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:40:42,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 164 [2023-11-17 11:40:42,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 11:40:42,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:42,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 164 [2023-11-17 11:40:42,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:43,262 INFO L124 PetriNetUnfolderBase]: 5560/8266 cut-off events. [2023-11-17 11:40:43,262 INFO L125 PetriNetUnfolderBase]: For 2060/2060 co-relation queries the response was YES. [2023-11-17 11:40:43,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17474 conditions, 8266 events. 5560/8266 cut-off events. For 2060/2060 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 44395 event pairs, 637 based on Foata normal form. 819/9084 useless extension candidates. Maximal degree in co-relation 15411. Up to 5346 conditions per place. [2023-11-17 11:40:43,301 INFO L140 encePairwiseOnDemand]: 161/164 looper letters, 79 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-11-17 11:40:43,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 368 flow [2023-11-17 11:40:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:40:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:40:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 254 transitions. [2023-11-17 11:40:43,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.258130081300813 [2023-11-17 11:40:43,303 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 254 transitions. [2023-11-17 11:40:43,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 254 transitions. [2023-11-17 11:40:43,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:43,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 254 transitions. [2023-11-17 11:40:43,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 42.333333333333336) internal successors, (254), 6 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 11:40:43,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 11:40:43,306 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 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 11:40:43,306 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 104 flow. Second operand 6 states and 254 transitions. [2023-11-17 11:40:43,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 368 flow [2023-11-17 11:40:43,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 364 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:40:43,310 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 104 flow [2023-11-17 11:40:43,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-17 11:40:43,311 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-11-17 11:40:43,311 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 104 flow [2023-11-17 11:40:43,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 11:40:43,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:43,311 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:40:43,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 11:40:43,516 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,SelfDestructingSolverStorable6 [2023-11-17 11:40:43,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:43,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:43,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1747201408, now seen corresponding path program 1 times [2023-11-17 11:40:43,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:43,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348215443] [2023-11-17 11:40:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:43,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:43,536 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:43,550 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:43,550 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:43,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:40:43,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:40:43,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:40:43,551 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:40:43,551 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:43,551 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:40:43,581 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:40:43,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:40:43,612 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2023-11-17 11:40:43,612 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:40:43,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1242 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2023-11-17 11:40:43,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:40:43,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 124 transitions, 288 flow [2023-11-17 11:40:43,615 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:43,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 124 transitions, 288 flow [2023-11-17 11:40:43,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 124 transitions, 288 flow [2023-11-17 11:40:43,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:40:43,640 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2023-11-17 11:40:43,640 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:40:43,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1242 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2023-11-17 11:40:43,650 INFO L119 LiptonReduction]: Number of co-enabled transitions 11408 [2023-11-17 11:40:45,004 INFO L134 LiptonReduction]: Checked pairs total: 29996 [2023-11-17 11:40:45,004 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-11-17 11:40:45,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:45,008 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;@81c688f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:45,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:40:45,011 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:45,011 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:40:45,011 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:45,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:45,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:40:45,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:45,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash 25410823, now seen corresponding path program 1 times [2023-11-17 11:40:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480512681] [2023-11-17 11:40:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:45,042 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 11:40:45,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:45,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480512681] [2023-11-17 11:40:45,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480512681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:45,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:45,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:45,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447682541] [2023-11-17 11:40:45,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:45,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:45,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:45,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:45,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 206 [2023-11-17 11:40:45,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 84 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 11:40:45,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:45,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 206 [2023-11-17 11:40:45,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:13,323 INFO L124 PetriNetUnfolderBase]: 302884/397535 cut-off events. [2023-11-17 11:41:13,324 INFO L125 PetriNetUnfolderBase]: For 15692/15692 co-relation queries the response was YES. [2023-11-17 11:41:14,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800904 conditions, 397535 events. 302884/397535 cut-off events. For 15692/15692 co-relation queries the response was YES. Maximal size of possible extension queue 7029. Compared 2574155 event pairs, 223134 based on Foata normal form. 38508/410248 useless extension candidates. Maximal degree in co-relation 68277. Up to 395355 conditions per place. [2023-11-17 11:41:15,090 INFO L140 encePairwiseOnDemand]: 176/206 looper letters, 50 selfloop transitions, 2 changer transitions 10/67 dead transitions. [2023-11-17 11:41:15,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 298 flow [2023-11-17 11:41:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:41:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:41:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-11-17 11:41:15,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32524271844660196 [2023-11-17 11:41:15,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-11-17 11:41:15,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-11-17 11:41:15,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:15,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-11-17 11:41:15,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 11:41:15,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 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 11:41:15,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 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 11:41:15,095 INFO L175 Difference]: Start difference. First operand has 62 places, 84 transitions, 208 flow. Second operand 3 states and 201 transitions. [2023-11-17 11:41:15,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 298 flow [2023-11-17 11:41:15,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:15,103 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 134 flow [2023-11-17 11:41:15,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2023-11-17 11:41:15,105 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-11-17 11:41:15,105 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 134 flow [2023-11-17 11:41:15,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 11:41:15,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:15,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:15,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:41:15,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:41:15,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash 804233849, now seen corresponding path program 1 times [2023-11-17 11:41:15,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:15,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58524927] [2023-11-17 11:41:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:15,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:15,159 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 11:41:15,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58524927] [2023-11-17 11:41:15,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58524927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65368718] [2023-11-17 11:41:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:15,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:15,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:15,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:41:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:15,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:41:15,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:15,273 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 11:41:15,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:41:15,288 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 11:41:15,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65368718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:41:15,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:41:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:41:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123242657] [2023-11-17 11:41:15,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:41:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:41:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:15,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:41:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:41:15,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 206 [2023-11-17 11:41:15,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 11:41:15,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:15,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 206 [2023-11-17 11:41:15,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:26,757 INFO L124 PetriNetUnfolderBase]: 139696/184468 cut-off events. [2023-11-17 11:41:26,757 INFO L125 PetriNetUnfolderBase]: For 25371/25371 co-relation queries the response was YES. [2023-11-17 11:41:27,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383946 conditions, 184468 events. 139696/184468 cut-off events. For 25371/25371 co-relation queries the response was YES. Maximal size of possible extension queue 3890. Compared 1143970 event pairs, 16738 based on Foata normal form. 819/185277 useless extension candidates. Maximal degree in co-relation 340191. Up to 119557 conditions per place. [2023-11-17 11:41:27,888 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 123 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-11-17 11:41:27,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 134 transitions, 568 flow [2023-11-17 11:41:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:41:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:41:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 342 transitions. [2023-11-17 11:41:27,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766990291262136 [2023-11-17 11:41:27,890 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 342 transitions. [2023-11-17 11:41:27,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 342 transitions. [2023-11-17 11:41:27,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:27,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 342 transitions. [2023-11-17 11:41:27,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 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 11:41:27,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 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 11:41:27,894 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 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 11:41:27,894 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 134 flow. Second operand 6 states and 342 transitions. [2023-11-17 11:41:27,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 134 transitions, 568 flow [2023-11-17 11:41:27,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 134 transitions, 560 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:27,909 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 166 flow [2023-11-17 11:41:27,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-11-17 11:41:27,910 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2023-11-17 11:41:27,910 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 166 flow [2023-11-17 11:41:27,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 11:41:27,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:27,910 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:27,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 11:41:28,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:28,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:41:28,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:28,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1110921807, now seen corresponding path program 1 times [2023-11-17 11:41:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:28,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900892523] [2023-11-17 11:41:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:28,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:28,146 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:41:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:28,182 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:41:28,182 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:41:28,182 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:41:28,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:41:28,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:41:28,183 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:41:28,184 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:41:28,184 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:41:28,235 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 11:41:28,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:41:28,280 INFO L124 PetriNetUnfolderBase]: 102/410 cut-off events. [2023-11-17 11:41:28,281 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:41:28,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 410 events. 102/410 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2014 event pairs, 23 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 321. Up to 80 conditions per place. [2023-11-17 11:41:28,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:41:28,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 149 transitions, 353 flow [2023-11-17 11:41:28,290 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:28,290 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 149 transitions, 353 flow [2023-11-17 11:41:28,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 149 transitions, 353 flow [2023-11-17 11:41:28,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:41:28,329 INFO L124 PetriNetUnfolderBase]: 102/410 cut-off events. [2023-11-17 11:41:28,329 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:41:28,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 410 events. 102/410 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2014 event pairs, 23 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 321. Up to 80 conditions per place. [2023-11-17 11:41:28,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 17250 [2023-11-17 11:41:30,228 INFO L134 LiptonReduction]: Checked pairs total: 46070 [2023-11-17 11:41:30,229 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-11-17 11:41:30,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:30,231 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;@81c688f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:30,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:41:30,233 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:30,233 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:41:30,233 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:41:30,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:30,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:41:30,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:41:30,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash 32551753, now seen corresponding path program 1 times [2023-11-17 11:41:30,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:30,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26935180] [2023-11-17 11:41:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:30,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:30,271 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 11:41:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:30,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26935180] [2023-11-17 11:41:30,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26935180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:30,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:30,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:30,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906573562] [2023-11-17 11:41:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:30,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:30,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 248 [2023-11-17 11:41:30,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 101 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 11:41:30,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:30,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 248 [2023-11-17 11:41:30,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand