/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_24-sound_lock_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:39:05,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:39:05,169 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 11:39:05,198 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:39:05,199 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:39:05,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:39:05,200 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:39:05,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:39:05,200 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:39:05,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:39:05,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:39:05,201 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:39:05,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:39:05,202 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:39:05,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:39:05,202 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:39:05,206 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:39:05,206 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:39:05,207 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:39:05,207 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:39:05,207 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:39:05,208 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:39:05,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:39:05,208 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:39:05,208 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:39:05,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:39:05,209 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:39:05,209 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:39:05,209 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:39:05,209 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:39:05,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:39:05,211 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:39:05,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:39:05,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:39:05,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:39:05,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:39:05,494 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:39:05,495 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:39:05,496 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-17 11:39:06,641 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:39:06,931 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:39:06,932 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-17 11:39:06,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccb780aa/e75a4b29b8284b09b43e7bf593afc76b/FLAG2ca5fcb75 [2023-11-17 11:39:06,958 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccb780aa/e75a4b29b8284b09b43e7bf593afc76b [2023-11-17 11:39:06,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:39:06,961 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:39:06,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:39:06,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:39:06,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:39:06,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:39:06" (1/1) ... [2023-11-17 11:39:06,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d361ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:06, skipping insertion in model container [2023-11-17 11:39:06,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:39:06" (1/1) ... [2023-11-17 11:39:07,019 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:39:07,291 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_24-sound_lock_racing.i[30176,30189] [2023-11-17 11:39:07,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:39:07,332 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:39:07,378 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_24-sound_lock_racing.i[30176,30189] [2023-11-17 11:39:07,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:39:07,437 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:39:07,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07 WrapperNode [2023-11-17 11:39:07,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:39:07,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:39:07,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:39:07,440 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:39:07,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,504 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2023-11-17 11:39:07,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:39:07,506 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:39:07,506 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:39:07,506 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:39:07,513 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,538 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,541 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:39:07,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:39:07,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:39:07,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:39:07,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (1/1) ... [2023-11-17 11:39:07,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:39:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:07,596 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 11:39:07,613 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 11:39:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:39:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:39:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:39:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:39:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:39:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:39:07,633 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:39:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:39:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:39:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:39:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:39:07,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:39:07,635 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 11:39:07,760 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:39:07,763 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:39:07,973 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:39:08,145 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:39:08,145 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 11:39:08,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:39:08 BoogieIcfgContainer [2023-11-17 11:39:08,146 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:39:08,149 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:39:08,149 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:39:08,152 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:39:08,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:39:06" (1/3) ... [2023-11-17 11:39:08,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d557577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:39:08, skipping insertion in model container [2023-11-17 11:39:08,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:39:07" (2/3) ... [2023-11-17 11:39:08,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d557577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:39:08, skipping insertion in model container [2023-11-17 11:39:08,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:39:08" (3/3) ... [2023-11-17 11:39:08,154 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-11-17 11:39:08,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:39:08,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:39:08,167 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:39:08,201 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:39:08,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 105 flow [2023-11-17 11:39:08,286 INFO L124 PetriNetUnfolderBase]: 13/69 cut-off events. [2023-11-17 11:39:08,287 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:39:08,292 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 225 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 11:39:08,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 49 transitions, 105 flow [2023-11-17 11:39:08,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 47 transitions, 98 flow [2023-11-17 11:39:08,307 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:08,329 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 47 transitions, 98 flow [2023-11-17 11:39:08,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 47 transitions, 98 flow [2023-11-17 11:39:08,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 47 transitions, 98 flow [2023-11-17 11:39:08,356 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2023-11-17 11:39:08,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:08,358 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 216 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 11:39:08,359 INFO L119 LiptonReduction]: Number of co-enabled transitions 1012 [2023-11-17 11:39:08,988 INFO L134 LiptonReduction]: Checked pairs total: 2096 [2023-11-17 11:39:08,988 INFO L136 LiptonReduction]: Total number of compositions: 33 [2023-11-17 11:39:09,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:09,013 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;@23487bd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:09,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:09,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:09,016 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:39:09,017 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:09,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:09,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:39:09,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:09,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash 11252339, now seen corresponding path program 1 times [2023-11-17 11:39:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:09,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661345490] [2023-11-17 11:39:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:09,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:09,313 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 11:39:09,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:09,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661345490] [2023-11-17 11:39:09,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661345490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:09,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:09,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:09,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525441357] [2023-11-17 11:39:09,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:09,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:09,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:09,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 82 [2023-11-17 11:39:09,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:09,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:09,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 82 [2023-11-17 11:39:09,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:09,458 INFO L124 PetriNetUnfolderBase]: 72/174 cut-off events. [2023-11-17 11:39:09,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:09,460 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 701 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 11:39:09,462 INFO L140 encePairwiseOnDemand]: 69/82 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 11:39:09,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 120 flow [2023-11-17 11:39:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-17 11:39:09,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2023-11-17 11:39:09,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-17 11:39:09,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-17 11:39:09,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:09,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-17 11:39:09,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:09,487 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 11:39:09,487 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 11:39:09,489 INFO L175 Difference]: Start difference. First operand has 25 places, 31 transitions, 66 flow. Second operand 3 states and 90 transitions. [2023-11-17 11:39:09,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 120 flow [2023-11-17 11:39:09,492 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 11:39:09,493 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-17 11:39:09,495 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 11:39:09,498 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 11:39:09,499 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-17 11:39:09,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:09,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:09,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:39:09,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:39:09,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:09,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:09,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2136829554, now seen corresponding path program 1 times [2023-11-17 11:39:09,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:09,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654752680] [2023-11-17 11:39:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:09,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:09,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:09,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:09,596 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:09,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:09,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:09,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:39:09,604 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:39:09,607 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:09,607 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:39:09,630 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:39:09,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:39:09,650 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2023-11-17 11:39:09,650 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:39:09,652 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 470 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 11:39:09,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:39:09,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 74 transitions, 164 flow [2023-11-17 11:39:09,656 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:09,656 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 74 transitions, 164 flow [2023-11-17 11:39:09,656 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 74 transitions, 164 flow [2023-11-17 11:39:09,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:39:09,676 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2023-11-17 11:39:09,676 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:39:09,680 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 470 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 11:39:09,684 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-11-17 11:39:10,441 INFO L134 LiptonReduction]: Checked pairs total: 7789 [2023-11-17 11:39:10,442 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-11-17 11:39:10,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:10,449 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;@23487bd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:10,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:10,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:10,452 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-11-17 11:39:10,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:10,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:10,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:39:10,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:10,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash 14585664, now seen corresponding path program 1 times [2023-11-17 11:39:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:10,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115145810] [2023-11-17 11:39:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:10,523 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 11:39:10,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:10,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115145810] [2023-11-17 11:39:10,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115145810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:10,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:10,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:10,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501437145] [2023-11-17 11:39:10,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:10,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:10,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:10,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:10,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:10,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 125 [2023-11-17 11:39:10,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 50 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:10,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:10,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 125 [2023-11-17 11:39:10,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:10,813 INFO L124 PetriNetUnfolderBase]: 1642/2696 cut-off events. [2023-11-17 11:39:10,813 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-17 11:39:10,817 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 95. Compared 13355 event pairs, 1515 based on Foata normal form. 214/2626 useless extension candidates. Maximal degree in co-relation 3826. Up to 2673 conditions per place. [2023-11-17 11:39:10,826 INFO L140 encePairwiseOnDemand]: 107/125 looper letters, 32 selfloop transitions, 2 changer transitions 8/45 dead transitions. [2023-11-17 11:39:10,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 190 flow [2023-11-17 11:39:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-17 11:39:10,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546666666666667 [2023-11-17 11:39:10,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-17 11:39:10,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-17 11:39:10,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:10,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-17 11:39:10,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:10,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:10,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:10,835 INFO L175 Difference]: Start difference. First operand has 38 places, 50 transitions, 116 flow. Second operand 3 states and 133 transitions. [2023-11-17 11:39:10,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 190 flow [2023-11-17 11:39:10,838 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 11:39:10,839 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 76 flow [2023-11-17 11:39:10,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, 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 11:39:10,840 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-17 11:39:10,840 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 76 flow [2023-11-17 11:39:10,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:10,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:10,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:10,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:39:10,840 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:10,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1843185271, now seen corresponding path program 1 times [2023-11-17 11:39:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:10,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787113555] [2023-11-17 11:39:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:10,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787113555] [2023-11-17 11:39:10,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787113555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:39:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170084511] [2023-11-17 11:39:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:10,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:10,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:10,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:39:10,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:39:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:11,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:39:11,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:39:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:11,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:39:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:11,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170084511] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:39:11,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:39:11,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:39:11,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948888807] [2023-11-17 11:39:11,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:39:11,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:39:11,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:11,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:39:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:39:11,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 125 [2023-11-17 11:39:11,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:11,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:11,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 125 [2023-11-17 11:39:11,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:11,227 INFO L124 PetriNetUnfolderBase]: 376/676 cut-off events. [2023-11-17 11:39:11,227 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-17 11:39:11,228 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 2807 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 11:39:11,231 INFO L140 encePairwiseOnDemand]: 122/125 looper letters, 45 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-17 11:39:11,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 216 flow [2023-11-17 11:39:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:39:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:39:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2023-11-17 11:39:11,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.264 [2023-11-17 11:39:11,233 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 165 transitions. [2023-11-17 11:39:11,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 165 transitions. [2023-11-17 11:39:11,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:11,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 165 transitions. [2023-11-17 11:39:11,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:11,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:11,236 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:11,236 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 76 flow. Second operand 5 states and 165 transitions. [2023-11-17 11:39:11,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 216 flow [2023-11-17 11:39:11,238 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 11:39:11,238 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2023-11-17 11:39:11,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, 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 11:39:11,239 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-17 11:39:11,239 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2023-11-17 11:39:11,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:11,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:11,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:39:11,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:39:11,446 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 11:39:11,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:11,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:11,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1671913508, now seen corresponding path program 1 times [2023-11-17 11:39:11,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:11,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137036094] [2023-11-17 11:39:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:11,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:11,473 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:11,501 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:11,502 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:11,502 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:11,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:11,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:39:11,502 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:39:11,504 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:11,504 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:39:11,526 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:39:11,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:39:11,544 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2023-11-17 11:39:11,544 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:39:11,545 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 14. Compared 785 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 11:39:11,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:39:11,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 99 transitions, 225 flow [2023-11-17 11:39:11,547 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:11,547 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 99 transitions, 225 flow [2023-11-17 11:39:11,547 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 99 transitions, 225 flow [2023-11-17 11:39:11,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:39:11,562 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2023-11-17 11:39:11,562 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:39:11,563 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 14. Compared 785 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 11:39:11,567 INFO L119 LiptonReduction]: Number of co-enabled transitions 6762 [2023-11-17 11:39:12,582 INFO L134 LiptonReduction]: Checked pairs total: 16342 [2023-11-17 11:39:12,583 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-11-17 11:39:12,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:12,586 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;@23487bd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:12,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:12,589 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:12,589 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:39:12,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:12,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:12,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:39:12,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:12,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash 19233092, now seen corresponding path program 1 times [2023-11-17 11:39:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:12,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435576376] [2023-11-17 11:39:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:12,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:12,632 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 11:39:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435576376] [2023-11-17 11:39:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435576376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:12,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:12,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15697612] [2023-11-17 11:39:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:12,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:12,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 166 [2023-11-17 11:39:12,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 67 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:12,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:12,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 166 [2023-11-17 11:39:12,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:15,399 INFO L124 PetriNetUnfolderBase]: 23815/33857 cut-off events. [2023-11-17 11:39:15,400 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2023-11-17 11:39:15,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68155 conditions, 33857 events. 23815/33857 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 199035 event pairs, 22652 based on Foata normal form. 3053/34169 useless extension candidates. Maximal degree in co-relation 26598. Up to 33630 conditions per place. [2023-11-17 11:39:15,556 INFO L140 encePairwiseOnDemand]: 142/166 looper letters, 41 selfloop transitions, 2 changer transitions 9/56 dead transitions. [2023-11-17 11:39:15,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 243 flow [2023-11-17 11:39:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-11-17 11:39:15,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3473895582329317 [2023-11-17 11:39:15,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-11-17 11:39:15,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-11-17 11:39:15,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:15,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-11-17 11:39:15,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:15,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:15,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:15,561 INFO L175 Difference]: Start difference. First operand has 50 places, 67 transitions, 161 flow. Second operand 3 states and 173 transitions. [2023-11-17 11:39:15,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 243 flow [2023-11-17 11:39:15,563 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 11:39:15,564 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 104 flow [2023-11-17 11:39:15,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, 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 11:39:15,565 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-17 11:39:15,565 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 104 flow [2023-11-17 11:39:15,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:15,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:15,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:15,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:39:15,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:15,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1988573160, now seen corresponding path program 1 times [2023-11-17 11:39:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:15,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368472794] [2023-11-17 11:39:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:15,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:15,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:15,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368472794] [2023-11-17 11:39:15,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368472794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:39:15,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907310513] [2023-11-17 11:39:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:15,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:15,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:15,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:39:15,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:39:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:15,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:39:15,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:39:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:15,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:39:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:15,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907310513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:39:15,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:39:15,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:39:15,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616864084] [2023-11-17 11:39:15,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:39:15,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:39:15,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:15,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:39:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:39:15,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 166 [2023-11-17 11:39:15,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:15,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:15,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 166 [2023-11-17 11:39:15,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:16,438 INFO L124 PetriNetUnfolderBase]: 5560/8266 cut-off events. [2023-11-17 11:39:16,439 INFO L125 PetriNetUnfolderBase]: For 2060/2060 co-relation queries the response was YES. [2023-11-17 11:39:16,451 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 44537 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 11:39:16,487 INFO L140 encePairwiseOnDemand]: 163/166 looper letters, 79 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-11-17 11:39:16,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 368 flow [2023-11-17 11:39:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:39:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:39:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 272 transitions. [2023-11-17 11:39:16,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27309236947791166 [2023-11-17 11:39:16,489 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 272 transitions. [2023-11-17 11:39:16,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 272 transitions. [2023-11-17 11:39:16,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:16,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 272 transitions. [2023-11-17 11:39:16,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 45.333333333333336) internal successors, (272), 6 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:16,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:16,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:16,494 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 104 flow. Second operand 6 states and 272 transitions. [2023-11-17 11:39:16,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 368 flow [2023-11-17 11:39:16,498 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 11:39:16,499 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 104 flow [2023-11-17 11:39:16,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, 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 11:39:16,501 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-11-17 11:39:16,506 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 104 flow [2023-11-17 11:39:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:16,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:16,507 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:39:16,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:39:16,712 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 11:39:16,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:16,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 781636781, now seen corresponding path program 1 times [2023-11-17 11:39:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768685181] [2023-11-17 11:39:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:16,738 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:16,763 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:16,764 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:16,764 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:16,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:16,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:39:16,764 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:39:16,766 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:16,766 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:39:16,790 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:39:16,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:39:16,816 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2023-11-17 11:39:16,816 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:39:16,818 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 16. Compared 1221 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 11:39:16,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:39:16,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 124 transitions, 288 flow [2023-11-17 11:39:16,820 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:16,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 124 transitions, 288 flow [2023-11-17 11:39:16,821 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 124 transitions, 288 flow [2023-11-17 11:39:16,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:39:16,846 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2023-11-17 11:39:16,846 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:39:16,848 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 16. Compared 1221 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 11:39:16,857 INFO L119 LiptonReduction]: Number of co-enabled transitions 11408 [2023-11-17 11:39:18,059 INFO L134 LiptonReduction]: Checked pairs total: 28037 [2023-11-17 11:39:18,059 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-17 11:39:18,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:18,063 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;@23487bd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:18,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:18,065 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:18,066 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:39:18,066 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:18,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:18,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:39:18,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:18,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash 25150357, now seen corresponding path program 1 times [2023-11-17 11:39:18,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:18,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482732424] [2023-11-17 11:39:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:18,103 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 11:39:18,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:18,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482732424] [2023-11-17 11:39:18,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482732424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:18,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:18,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:18,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076275249] [2023-11-17 11:39:18,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:18,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:18,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:18,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 210 [2023-11-17 11:39:18,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 84 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:18,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:18,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 210 [2023-11-17 11:39:18,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:43,490 INFO L124 PetriNetUnfolderBase]: 302884/397589 cut-off events. [2023-11-17 11:39:43,490 INFO L125 PetriNetUnfolderBase]: For 15712/15712 co-relation queries the response was YES. [2023-11-17 11:39:44,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800958 conditions, 397589 events. 302884/397589 cut-off events. For 15712/15712 co-relation queries the response was YES. Maximal size of possible extension queue 7035. Compared 2577318 event pairs, 223134 based on Foata normal form. 38508/410338 useless extension candidates. Maximal degree in co-relation 68283. Up to 395355 conditions per place. [2023-11-17 11:39:45,157 INFO L140 encePairwiseOnDemand]: 180/210 looper letters, 50 selfloop transitions, 2 changer transitions 10/67 dead transitions. [2023-11-17 11:39:45,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 298 flow [2023-11-17 11:39:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-11-17 11:39:45,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380952380952381 [2023-11-17 11:39:45,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-11-17 11:39:45,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-11-17 11:39:45,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:45,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-11-17 11:39:45,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:45,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:45,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:45,161 INFO L175 Difference]: Start difference. First operand has 62 places, 84 transitions, 208 flow. Second operand 3 states and 213 transitions. [2023-11-17 11:39:45,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 298 flow [2023-11-17 11:39:45,167 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 11:39:45,168 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 134 flow [2023-11-17 11:39:45,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 11:39:45,169 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-11-17 11:39:45,169 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 134 flow [2023-11-17 11:39:45,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:45,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:45,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:45,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:39:45,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:45,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1079835695, now seen corresponding path program 1 times [2023-11-17 11:39:45,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:45,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419282034] [2023-11-17 11:39:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:45,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:45,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419282034] [2023-11-17 11:39:45,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419282034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:39:45,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709470271] [2023-11-17 11:39:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:45,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:45,216 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 11:39:45,219 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 11:39:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:45,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:39:45,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:39:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:45,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:39:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:39:45,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709470271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:39:45,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:39:45,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:39:45,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675557460] [2023-11-17 11:39:45,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:39:45,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:39:45,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:39:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:39:45,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 210 [2023-11-17 11:39:45,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:45,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:45,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 210 [2023-11-17 11:39:45,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:55,338 INFO L124 PetriNetUnfolderBase]: 139696/184468 cut-off events. [2023-11-17 11:39:55,339 INFO L125 PetriNetUnfolderBase]: For 29745/29745 co-relation queries the response was YES. [2023-11-17 11:39:55,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383946 conditions, 184468 events. 139696/184468 cut-off events. For 29745/29745 co-relation queries the response was YES. Maximal size of possible extension queue 3929. Compared 1144820 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 11:39:56,296 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 123 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-11-17 11:39:56,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 134 transitions, 568 flow [2023-11-17 11:39:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:39:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:39:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2023-11-17 11:39:56,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2904761904761905 [2023-11-17 11:39:56,299 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2023-11-17 11:39:56,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2023-11-17 11:39:56,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:56,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2023-11-17 11:39:56,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:56,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 210.0) internal successors, (1470), 7 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:56,302 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 210.0) internal successors, (1470), 7 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:56,302 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 134 flow. Second operand 6 states and 366 transitions. [2023-11-17 11:39:56,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 134 transitions, 568 flow [2023-11-17 11:39:56,313 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 11:39:56,314 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 166 flow [2023-11-17 11:39:56,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 11:39:56,315 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2023-11-17 11:39:56,315 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 166 flow [2023-11-17 11:39:56,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:56,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:56,316 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:56,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 11:39:56,521 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 11:39:56,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:56,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1174498438, now seen corresponding path program 1 times [2023-11-17 11:39:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:56,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222575327] [2023-11-17 11:39:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:56,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:56,565 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:56,565 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:56,565 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:56,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:39:56,566 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:39:56,567 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:56,567 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:39:56,598 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 11:39:56,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:39:56,641 INFO L124 PetriNetUnfolderBase]: 102/410 cut-off events. [2023-11-17 11:39:56,641 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:39:56,645 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 1959 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 11:39:56,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:39:56,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 149 transitions, 353 flow [2023-11-17 11:39:56,648 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:56,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 149 transitions, 353 flow [2023-11-17 11:39:56,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 149 transitions, 353 flow [2023-11-17 11:39:56,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:39:56,673 INFO L124 PetriNetUnfolderBase]: 102/410 cut-off events. [2023-11-17 11:39:56,673 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:39:56,675 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 1959 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 11:39:56,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 17250 [2023-11-17 11:39:58,278 INFO L134 LiptonReduction]: Checked pairs total: 43253 [2023-11-17 11:39:58,279 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-11-17 11:39:58,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:58,284 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;@23487bd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:58,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:58,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:58,286 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 11:39:58,286 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:58,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:58,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:39:58,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:58,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:58,287 INFO L85 PathProgramCache]: Analyzing trace with hash 32409604, now seen corresponding path program 1 times [2023-11-17 11:39:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324547532] [2023-11-17 11:39:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:58,314 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 11:39:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324547532] [2023-11-17 11:39:58,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324547532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:58,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:58,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:58,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240330311] [2023-11-17 11:39:58,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:58,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:58,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:58,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 248 [2023-11-17 11:39:58,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 101 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:58,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:58,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 248 [2023-11-17 11:39:58,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand