/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:36:15,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:36:15,501 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 15:36:15,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:36:15,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:36:15,527 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:36:15,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:36:15,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:36:15,528 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:36:15,530 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:36:15,531 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:36:15,531 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:36:15,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:36:15,532 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:36:15,532 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:36:15,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:36:15,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:36:15,533 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:36:15,533 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:36:15,533 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:36:15,533 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:36:15,534 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:36:15,534 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:36:15,534 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:36:15,535 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:36:15,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:15,535 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:36:15,536 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:36:15,536 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:36:15,536 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:36:15,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:36:15,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:36:15,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:36:15,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:36:15,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:36:15,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:36:15,747 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:36:15,747 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:36:15,748 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-11-17 15:36:16,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:36:16,916 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:36:16,917 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-11-17 15:36:16,930 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c03896c/7e3344c370274eb68c4dd70254229483/FLAGc95628b65 [2023-11-17 15:36:16,943 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c03896c/7e3344c370274eb68c4dd70254229483 [2023-11-17 15:36:16,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:36:16,945 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:36:16,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:16,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:36:16,949 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:36:16,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:16" (1/1) ... [2023-11-17 15:36:16,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43582551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:16, skipping insertion in model container [2023-11-17 15:36:16,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:16" (1/1) ... [2023-11-17 15:36:16,988 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:36:17,189 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_12-ptr_racefree.i[30176,30189] [2023-11-17 15:36:17,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:17,223 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:36:17,253 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_12-ptr_racefree.i[30176,30189] [2023-11-17 15:36:17,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:17,297 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:36:17,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17 WrapperNode [2023-11-17 15:36:17,298 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:17,299 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:17,299 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:36:17,299 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:36:17,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,312 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,326 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2023-11-17 15:36:17,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:17,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:36:17,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:36:17,327 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:36:17,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,341 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,352 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:36:17,357 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:36:17,357 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:36:17,357 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:36:17,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (1/1) ... [2023-11-17 15:36:17,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:17,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:17,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:36:17,388 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 15:36:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:36:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:36:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:36:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:36:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:36:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:36:17,405 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:36:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:36:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:36:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:36:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:36:17,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:36:17,407 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 15:36:17,505 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:36:17,507 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:36:17,658 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:36:17,682 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:36:17,683 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:36:17,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:17 BoogieIcfgContainer [2023-11-17 15:36:17,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:36:17,686 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:36:17,686 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:36:17,688 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:36:17,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:16" (1/3) ... [2023-11-17 15:36:17,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501be75c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:17, skipping insertion in model container [2023-11-17 15:36:17,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:17" (2/3) ... [2023-11-17 15:36:17,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501be75c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:17, skipping insertion in model container [2023-11-17 15:36:17,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:17" (3/3) ... [2023-11-17 15:36:17,690 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-11-17 15:36:17,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:36:17,701 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:36:17,701 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:36:17,738 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:36:17,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 127 transitions, 261 flow [2023-11-17 15:36:17,809 INFO L124 PetriNetUnfolderBase]: 17/169 cut-off events. [2023-11-17 15:36:17,809 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:17,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 169 events. 17/169 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 424 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-11-17 15:36:17,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 127 transitions, 261 flow [2023-11-17 15:36:17,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 122 transitions, 248 flow [2023-11-17 15:36:17,820 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:17,828 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 122 transitions, 248 flow [2023-11-17 15:36:17,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 122 transitions, 248 flow [2023-11-17 15:36:17,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 122 transitions, 248 flow [2023-11-17 15:36:17,873 INFO L124 PetriNetUnfolderBase]: 16/164 cut-off events. [2023-11-17 15:36:17,874 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:17,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 164 events. 16/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 410 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-11-17 15:36:17,876 INFO L119 LiptonReduction]: Number of co-enabled transitions 3456 [2023-11-17 15:36:20,388 INFO L134 LiptonReduction]: Checked pairs total: 5070 [2023-11-17 15:36:20,388 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-11-17 15:36:20,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:20,403 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;@2251f835, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:20,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:20,405 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:20,406 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:36:20,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:20,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:20,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:20,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:20,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash 16253131, now seen corresponding path program 1 times [2023-11-17 15:36:20,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:20,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006765482] [2023-11-17 15:36:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:20,617 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 15:36:20,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:20,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006765482] [2023-11-17 15:36:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006765482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:20,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:20,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56707351] [2023-11-17 15:36:20,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:20,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:20,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 242 [2023-11-17 15:36:20,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 15:36:20,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:20,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 242 [2023-11-17 15:36:20,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:20,725 INFO L124 PetriNetUnfolderBase]: 90/214 cut-off events. [2023-11-17 15:36:20,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:20,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 214 events. 90/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 905 event pairs, 0 based on Foata normal form. 10/202 useless extension candidates. Maximal degree in co-relation 399. Up to 190 conditions per place. [2023-11-17 15:36:20,730 INFO L140 encePairwiseOnDemand]: 229/242 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-11-17 15:36:20,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 136 flow [2023-11-17 15:36:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-11-17 15:36:20,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559228650137741 [2023-11-17 15:36:20,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-11-17 15:36:20,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-11-17 15:36:20,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:20,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-11-17 15:36:20,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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 15:36:20,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 15:36:20,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 15:36:20,757 INFO L175 Difference]: Start difference. First operand has 27 places, 33 transitions, 70 flow. Second operand 3 states and 331 transitions. [2023-11-17 15:36:20,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 136 flow [2023-11-17 15:36:20,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:20,762 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 50 flow [2023-11-17 15:36:20,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-11-17 15:36:20,767 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-11-17 15:36:20,767 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 50 flow [2023-11-17 15:36:20,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 15:36:20,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:20,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:36:20,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:36:20,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:20,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1572480431, now seen corresponding path program 1 times [2023-11-17 15:36:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:20,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199400525] [2023-11-17 15:36:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:20,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:20,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:20,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:20,846 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:20,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:20,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:20,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:36:20,850 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:36:20,852 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:20,852 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:36:20,877 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:36:20,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 346 flow [2023-11-17 15:36:20,905 INFO L124 PetriNetUnfolderBase]: 31/275 cut-off events. [2023-11-17 15:36:20,906 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:36:20,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 275 events. 31/275 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 879 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-11-17 15:36:20,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 165 transitions, 346 flow [2023-11-17 15:36:20,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 165 transitions, 346 flow [2023-11-17 15:36:20,909 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:20,909 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 165 transitions, 346 flow [2023-11-17 15:36:20,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 165 transitions, 346 flow [2023-11-17 15:36:20,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 346 flow [2023-11-17 15:36:20,931 INFO L124 PetriNetUnfolderBase]: 31/275 cut-off events. [2023-11-17 15:36:20,931 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:36:20,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 275 events. 31/275 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 879 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-11-17 15:36:20,938 INFO L119 LiptonReduction]: Number of co-enabled transitions 10296 [2023-11-17 15:36:23,767 INFO L134 LiptonReduction]: Checked pairs total: 18608 [2023-11-17 15:36:23,768 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-17 15:36:23,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:23,770 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;@2251f835, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:23,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:23,772 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:23,772 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-11-17 15:36:23,772 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:23,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:23,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:23,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:23,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 26987321, now seen corresponding path program 1 times [2023-11-17 15:36:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:23,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624848257] [2023-11-17 15:36:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:23,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:23,813 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 15:36:23,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624848257] [2023-11-17 15:36:23,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624848257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:23,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:23,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789848858] [2023-11-17 15:36:23,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:23,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:23,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:23,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 311 [2023-11-17 15:36:23,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 15:36:23,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:23,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 311 [2023-11-17 15:36:23,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:24,116 INFO L124 PetriNetUnfolderBase]: 2248/3858 cut-off events. [2023-11-17 15:36:24,116 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-17 15:36:24,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7556 conditions, 3858 events. 2248/3858 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 21804 event pairs, 1026 based on Foata normal form. 247/3708 useless extension candidates. Maximal degree in co-relation 644. Up to 3624 conditions per place. [2023-11-17 15:36:24,127 INFO L140 encePairwiseOnDemand]: 293/311 looper letters, 37 selfloop transitions, 2 changer transitions 9/53 dead transitions. [2023-11-17 15:36:24,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 216 flow [2023-11-17 15:36:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-11-17 15:36:24,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533762057877814 [2023-11-17 15:36:24,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-11-17 15:36:24,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-11-17 15:36:24,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:24,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-11-17 15:36:24,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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 15:36:24,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 15:36:24,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 15:36:24,132 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 128 flow. Second operand 3 states and 423 transitions. [2023-11-17 15:36:24,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 216 flow [2023-11-17 15:36:24,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:24,134 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-17 15:36:24,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-11-17 15:36:24,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:36:24,134 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-17 15:36:24,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 15:36:24,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:24,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:24,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:36:24,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:24,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1716989195, now seen corresponding path program 1 times [2023-11-17 15:36:24,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:24,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724949128] [2023-11-17 15:36:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:24,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:24,168 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 15:36:24,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:24,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724949128] [2023-11-17 15:36:24,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724949128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:36:24,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562743790] [2023-11-17 15:36:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:24,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:24,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:24,171 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 15:36:24,196 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 15:36:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:24,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:36:24,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:36:24,292 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 15:36:24,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:36:24,311 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 15:36:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562743790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:36:24,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:36:24,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:36:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501475055] [2023-11-17 15:36:24,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:36:24,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:36:24,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:36:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:36:24,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 311 [2023-11-17 15:36:24,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 120.28571428571429) internal successors, (842), 7 states have internal predecessors, (842), 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 15:36:24,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:24,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 311 [2023-11-17 15:36:24,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:24,451 INFO L124 PetriNetUnfolderBase]: 518/1028 cut-off events. [2023-11-17 15:36:24,451 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-17 15:36:24,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2085 conditions, 1028 events. 518/1028 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5303 event pairs, 0 based on Foata normal form. 121/1148 useless extension candidates. Maximal degree in co-relation 189. Up to 618 conditions per place. [2023-11-17 15:36:24,456 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 53 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-17 15:36:24,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 252 flow [2023-11-17 15:36:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:36:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:36:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 648 transitions. [2023-11-17 15:36:24,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41672025723472667 [2023-11-17 15:36:24,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 648 transitions. [2023-11-17 15:36:24,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 648 transitions. [2023-11-17 15:36:24,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:24,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 648 transitions. [2023-11-17 15:36:24,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:24,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 15:36:24,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 15:36:24,463 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 648 transitions. [2023-11-17 15:36:24,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 252 flow [2023-11-17 15:36:24,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:36:24,465 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-17 15:36:24,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-17 15:36:24,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-17 15:36:24,467 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-17 15:36:24,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.28571428571429) internal successors, (842), 7 states have internal predecessors, (842), 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 15:36:24,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:24,468 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:36:24,475 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 15:36:24,672 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 15:36:24,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:24,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1849683971, now seen corresponding path program 1 times [2023-11-17 15:36:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:24,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285056981] [2023-11-17 15:36:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:24,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:24,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:24,708 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:24,709 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:24,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:24,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:36:24,709 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:36:24,710 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:24,710 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:36:24,742 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:36:24,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 203 transitions, 433 flow [2023-11-17 15:36:24,790 INFO L124 PetriNetUnfolderBase]: 50/416 cut-off events. [2023-11-17 15:36:24,790 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:36:24,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 416 events. 50/416 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1460 event pairs, 1 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 283. Up to 16 conditions per place. [2023-11-17 15:36:24,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 203 transitions, 433 flow [2023-11-17 15:36:24,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 203 transitions, 433 flow [2023-11-17 15:36:24,794 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:24,795 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 203 transitions, 433 flow [2023-11-17 15:36:24,795 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 203 transitions, 433 flow [2023-11-17 15:36:24,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 203 transitions, 433 flow [2023-11-17 15:36:24,819 INFO L124 PetriNetUnfolderBase]: 50/416 cut-off events. [2023-11-17 15:36:24,819 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:36:24,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 416 events. 50/416 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1460 event pairs, 1 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 283. Up to 16 conditions per place. [2023-11-17 15:36:24,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 19656 [2023-11-17 15:36:27,928 INFO L134 LiptonReduction]: Checked pairs total: 39157 [2023-11-17 15:36:27,928 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-11-17 15:36:27,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:27,940 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;@2251f835, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:27,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:27,942 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:27,942 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:36:27,942 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:27,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:27,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:27,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:27,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:27,942 INFO L85 PathProgramCache]: Analyzing trace with hash 39844693, now seen corresponding path program 1 times [2023-11-17 15:36:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:27,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238711704] [2023-11-17 15:36:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:27,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:27,977 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 15:36:27,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:27,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238711704] [2023-11-17 15:36:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238711704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:27,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870224055] [2023-11-17 15:36:27,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:27,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 382 [2023-11-17 15:36:27,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 15:36:27,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:27,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 382 [2023-11-17 15:36:27,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:30,943 INFO L124 PetriNetUnfolderBase]: 35761/52887 cut-off events. [2023-11-17 15:36:30,943 INFO L125 PetriNetUnfolderBase]: For 1439/1439 co-relation queries the response was YES. [2023-11-17 15:36:31,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103997 conditions, 52887 events. 35761/52887 cut-off events. For 1439/1439 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 356293 event pairs, 22925 based on Foata normal form. 3953/52583 useless extension candidates. Maximal degree in co-relation 8142. Up to 50190 conditions per place. [2023-11-17 15:36:31,130 INFO L140 encePairwiseOnDemand]: 359/382 looper letters, 47 selfloop transitions, 2 changer transitions 10/66 dead transitions. [2023-11-17 15:36:31,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 275 flow [2023-11-17 15:36:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-11-17 15:36:31,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44589877835951136 [2023-11-17 15:36:31,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-11-17 15:36:31,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-11-17 15:36:31,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:31,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-11-17 15:36:31,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:31,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 15:36:31,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 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 15:36:31,136 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 175 flow. Second operand 3 states and 511 transitions. [2023-11-17 15:36:31,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 275 flow [2023-11-17 15:36:31,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:31,139 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-17 15:36:31,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-17 15:36:31,140 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 15:36:31,140 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-17 15:36:31,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 15:36:31,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:31,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:31,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:36:31,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:31,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1211478536, now seen corresponding path program 1 times [2023-11-17 15:36:31,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:31,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141281386] [2023-11-17 15:36:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:31,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:31,181 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 15:36:31,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141281386] [2023-11-17 15:36:31,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141281386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:36:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862879062] [2023-11-17 15:36:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:31,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:31,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:31,186 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 15:36:31,212 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 15:36:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:31,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:36:31,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:36:31,267 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 15:36:31,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:36:31,280 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 15:36:31,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862879062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:36:31,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:36:31,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:36:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404842841] [2023-11-17 15:36:31,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:36:31,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:36:31,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:31,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:36:31,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:36:31,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 382 [2023-11-17 15:36:31,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 144.28571428571428) internal successors, (1010), 7 states have internal predecessors, (1010), 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 15:36:31,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:31,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 382 [2023-11-17 15:36:31,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:32,135 INFO L124 PetriNetUnfolderBase]: 8446/13708 cut-off events. [2023-11-17 15:36:32,135 INFO L125 PetriNetUnfolderBase]: For 4862/4862 co-relation queries the response was YES. [2023-11-17 15:36:32,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27578 conditions, 13708 events. 8446/13708 cut-off events. For 4862/4862 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 92377 event pairs, 0 based on Foata normal form. 1221/14928 useless extension candidates. Maximal degree in co-relation 2561. Up to 8074 conditions per place. [2023-11-17 15:36:32,181 INFO L140 encePairwiseOnDemand]: 379/382 looper letters, 93 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-11-17 15:36:32,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 104 transitions, 430 flow [2023-11-17 15:36:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:36:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:36:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 952 transitions. [2023-11-17 15:36:32,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41535776614310643 [2023-11-17 15:36:32,183 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 952 transitions. [2023-11-17 15:36:32,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 952 transitions. [2023-11-17 15:36:32,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:32,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 952 transitions. [2023-11-17 15:36:32,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 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 15:36:32,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 382.0) internal successors, (2674), 7 states have internal predecessors, (2674), 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 15:36:32,188 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 382.0) internal successors, (2674), 7 states have internal predecessors, (2674), 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 15:36:32,188 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 952 transitions. [2023-11-17 15:36:32,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 104 transitions, 430 flow [2023-11-17 15:36:32,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 104 transitions, 426 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:36:32,191 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-17 15:36:32,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-17 15:36:32,192 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-17 15:36:32,192 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-17 15:36:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.28571428571428) internal successors, (1010), 7 states have internal predecessors, (1010), 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 15:36:32,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:32,192 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:36:32,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 15:36:32,397 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 15:36:32,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:32,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1166069400, now seen corresponding path program 1 times [2023-11-17 15:36:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742090988] [2023-11-17 15:36:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:32,408 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:32,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:32,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:32,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:36:32,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:36:32,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:36:32,428 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:36:32,429 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:32,429 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:36:32,448 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:36:32,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 522 flow [2023-11-17 15:36:32,493 INFO L124 PetriNetUnfolderBase]: 81/629 cut-off events. [2023-11-17 15:36:32,493 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:36:32,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 629 events. 81/629 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2564 event pairs, 6 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 436. Up to 32 conditions per place. [2023-11-17 15:36:32,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 241 transitions, 522 flow [2023-11-17 15:36:32,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 241 transitions, 522 flow [2023-11-17 15:36:32,502 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:32,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 241 transitions, 522 flow [2023-11-17 15:36:32,502 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 241 transitions, 522 flow [2023-11-17 15:36:32,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 522 flow [2023-11-17 15:36:32,544 INFO L124 PetriNetUnfolderBase]: 81/629 cut-off events. [2023-11-17 15:36:32,544 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:36:32,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 629 events. 81/629 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2564 event pairs, 6 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 436. Up to 32 conditions per place. [2023-11-17 15:36:32,562 INFO L119 LiptonReduction]: Number of co-enabled transitions 31824 [2023-11-17 15:36:35,983 INFO L134 LiptonReduction]: Checked pairs total: 67042 [2023-11-17 15:36:35,984 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-11-17 15:36:35,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:35,985 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;@2251f835, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:35,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:36:35,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:35,986 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:36:35,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:35,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:35,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:36:35,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:35,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash 54880839, now seen corresponding path program 1 times [2023-11-17 15:36:35,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:35,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730560952] [2023-11-17 15:36:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:35,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:36,002 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 15:36:36,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:36,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730560952] [2023-11-17 15:36:36,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730560952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:36,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:36,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:36:36,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680897612] [2023-11-17 15:36:36,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:36,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:36,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:36,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 449 [2023-11-17 15:36:36,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 15:36:36,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:36,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 449 [2023-11-17 15:36:36,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand