/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_78-equ_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:39:40,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:39:40,859 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 15:39:40,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:39:40,894 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:39:40,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:39:40,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:39:40,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:39:40,896 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:39:40,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:39:40,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:39:40,898 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:39:40,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:39:40,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:39:40,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:39:40,899 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:39:40,899 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:39:40,899 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:39:40,900 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:39:40,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:39:40,900 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:39:40,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:39:40,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:39:40,901 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:39:40,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:39:40,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:39:40,902 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:39:40,902 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:39:40,902 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:39:40,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:39:40,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:39:40,903 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:39:40,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:39:41,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:39:41,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:39:41,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:39:41,183 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:39:41,184 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:39:41,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-11-17 15:39:42,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:39:42,676 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:39:42,682 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-11-17 15:39:42,711 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e84b80af9/8b749455a2304d23b843eb5f5115c477/FLAGe704c1b22 [2023-11-17 15:39:42,724 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e84b80af9/8b749455a2304d23b843eb5f5115c477 [2023-11-17 15:39:42,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:39:42,728 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:39:42,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:39:42,730 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:39:42,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:39:42,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:39:42" (1/1) ... [2023-11-17 15:39:42,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eeae921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:42, skipping insertion in model container [2023-11-17 15:39:42,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:39:42" (1/1) ... [2023-11-17 15:39:42,809 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:39:43,283 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_78-equ_racing.i[47038,47051] [2023-11-17 15:39:43,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:39:43,346 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:39:43,386 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_78-equ_racing.i[47038,47051] [2023-11-17 15:39:43,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:39:43,477 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:39:43,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43 WrapperNode [2023-11-17 15:39:43,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:39:43,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:39:43,480 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:39:43,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:39:43,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,562 INFO L138 Inliner]: procedures = 272, calls = 64, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 229 [2023-11-17 15:39:43,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:39:43,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:39:43,564 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:39:43,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:39:43,572 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,585 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,592 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,601 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,605 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:39:43,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:39:43,612 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:39:43,612 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:39:43,613 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (1/1) ... [2023-11-17 15:39:43,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:39:43,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:39:43,649 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 15:39:43,677 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 15:39:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:39:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:39:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:39:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:39:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:39:43,687 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:39:43,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:39:43,687 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:39:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:39:43,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:39:43,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:39:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:39:43,690 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 15:39:43,848 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:39:43,850 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:39:44,092 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:39:44,172 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:39:44,173 INFO L307 CfgBuilder]: Removed 22 assume(true) statements. [2023-11-17 15:39:44,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:39:44 BoogieIcfgContainer [2023-11-17 15:39:44,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:39:44,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:39:44,177 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:39:44,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:39:44,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:39:42" (1/3) ... [2023-11-17 15:39:44,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a22d4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:39:44, skipping insertion in model container [2023-11-17 15:39:44,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:39:43" (2/3) ... [2023-11-17 15:39:44,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a22d4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:39:44, skipping insertion in model container [2023-11-17 15:39:44,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:39:44" (3/3) ... [2023-11-17 15:39:44,185 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2023-11-17 15:39:44,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:39:44,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 15:39:44,202 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:39:44,292 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:39:44,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 215 transitions, 437 flow [2023-11-17 15:39:44,494 INFO L124 PetriNetUnfolderBase]: 43/294 cut-off events. [2023-11-17 15:39:44,494 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:39:44,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 294 events. 43/294 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 957 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-11-17 15:39:44,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 215 transitions, 437 flow [2023-11-17 15:39:44,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 208 transitions, 420 flow [2023-11-17 15:39:44,526 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:39:44,542 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 208 transitions, 420 flow [2023-11-17 15:39:44,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 208 transitions, 420 flow [2023-11-17 15:39:44,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 208 transitions, 420 flow [2023-11-17 15:39:44,624 INFO L124 PetriNetUnfolderBase]: 41/287 cut-off events. [2023-11-17 15:39:44,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:44,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 287 events. 41/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 948 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-11-17 15:39:44,637 INFO L119 LiptonReduction]: Number of co-enabled transitions 10710 [2023-11-17 15:39:50,776 INFO L134 LiptonReduction]: Checked pairs total: 17680 [2023-11-17 15:39:50,776 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-11-17 15:39:50,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:39:50,798 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;@4a342134, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:39:50,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:39:50,805 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:39:50,806 INFO L124 PetriNetUnfolderBase]: 10/32 cut-off events. [2023-11-17 15:39:50,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:50,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:50,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:39:50,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:39:50,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash 858085082, now seen corresponding path program 1 times [2023-11-17 15:39:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:50,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941373547] [2023-11-17 15:39:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:51,189 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 15:39:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941373547] [2023-11-17 15:39:51,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941373547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:51,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:51,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:39:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100700122] [2023-11-17 15:39:51,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:51,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:51,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 414 [2023-11-17 15:39:51,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 64 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:51,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:51,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 414 [2023-11-17 15:39:51,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:51,385 INFO L124 PetriNetUnfolderBase]: 306/683 cut-off events. [2023-11-17 15:39:51,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:51,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 683 events. 306/683 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3617 event pairs, 0 based on Foata normal form. 72/666 useless extension candidates. Maximal degree in co-relation 1273. Up to 595 conditions per place. [2023-11-17 15:39:51,390 INFO L140 encePairwiseOnDemand]: 389/414 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-17 15:39:51,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 228 flow [2023-11-17 15:39:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:39:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:39:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2023-11-17 15:39:51,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605475040257649 [2023-11-17 15:39:51,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2023-11-17 15:39:51,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2023-11-17 15:39:51,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:51,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2023-11-17 15:39:51,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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 15:39:51,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 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 15:39:51,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 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 15:39:51,421 INFO L175 Difference]: Start difference. First operand has 44 places, 64 transitions, 132 flow. Second operand 3 states and 572 transitions. [2023-11-17 15:39:51,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 228 flow [2023-11-17 15:39:51,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:39:51,426 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 96 flow [2023-11-17 15:39:51,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-11-17 15:39:51,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-11-17 15:39:51,432 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 96 flow [2023-11-17 15:39:51,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:51,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:51,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:39:51,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:39:51,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:39:51,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:51,434 INFO L85 PathProgramCache]: Analyzing trace with hash 804090333, now seen corresponding path program 1 times [2023-11-17 15:39:51,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:51,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883526212] [2023-11-17 15:39:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:51,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:51,460 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:39:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:39:51,516 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:39:51,516 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:39:51,518 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:39:51,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:39:51,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:39:51,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:39:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:39:51,523 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:39:51,526 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:39:51,526 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:39:51,561 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:39:51,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 280 transitions, 576 flow [2023-11-17 15:39:51,636 INFO L124 PetriNetUnfolderBase]: 72/464 cut-off events. [2023-11-17 15:39:51,636 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:39:51,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 464 events. 72/464 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1885 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 296. Up to 12 conditions per place. [2023-11-17 15:39:51,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 280 transitions, 576 flow [2023-11-17 15:39:51,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 278 transitions, 572 flow [2023-11-17 15:39:51,649 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:39:51,649 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 278 transitions, 572 flow [2023-11-17 15:39:51,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 278 transitions, 572 flow [2023-11-17 15:39:51,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 278 transitions, 572 flow [2023-11-17 15:39:51,712 INFO L124 PetriNetUnfolderBase]: 71/462 cut-off events. [2023-11-17 15:39:51,712 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:39:51,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 462 events. 71/462 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1892 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 294. Up to 12 conditions per place. [2023-11-17 15:39:51,736 INFO L119 LiptonReduction]: Number of co-enabled transitions 30744 [2023-11-17 15:39:58,503 INFO L134 LiptonReduction]: Checked pairs total: 55627 [2023-11-17 15:39:58,504 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-11-17 15:39:58,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:39:58,507 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;@4a342134, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:39:58,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:39:58,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:39:58,511 INFO L124 PetriNetUnfolderBase]: 10/31 cut-off events. [2023-11-17 15:39:58,512 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:58,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:58,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:39:58,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:39:58,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1430202088, now seen corresponding path program 1 times [2023-11-17 15:39:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:58,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693342656] [2023-11-17 15:39:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:58,574 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 15:39:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693342656] [2023-11-17 15:39:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693342656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:58,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:58,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:39:58,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472945170] [2023-11-17 15:39:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:58,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:58,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:58,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:58,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 535 [2023-11-17 15:39:58,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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 15:39:58,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:58,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 535 [2023-11-17 15:39:58,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:59,978 INFO L124 PetriNetUnfolderBase]: 11606/18143 cut-off events. [2023-11-17 15:39:59,979 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-17 15:40:00,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35457 conditions, 18143 events. 11606/18143 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 118741 event pairs, 5232 based on Foata normal form. 2022/17479 useless extension candidates. Maximal degree in co-relation 2704. Up to 17203 conditions per place. [2023-11-17 15:40:00,110 INFO L140 encePairwiseOnDemand]: 501/535 looper letters, 73 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-17 15:40:00,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 336 flow [2023-11-17 15:40:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:40:00,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:40:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2023-11-17 15:40:00,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45607476635514016 [2023-11-17 15:40:00,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2023-11-17 15:40:00,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2023-11-17 15:40:00,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:40:00,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2023-11-17 15:40:00,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 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 15:40:00,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 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 15:40:00,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 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 15:40:00,195 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 212 flow. Second operand 3 states and 732 transitions. [2023-11-17 15:40:00,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 336 flow [2023-11-17 15:40:00,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:40:00,202 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 162 flow [2023-11-17 15:40:00,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-11-17 15:40:00,203 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-11-17 15:40:00,204 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 162 flow [2023-11-17 15:40:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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 15:40:00,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:00,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:40:00,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:40:00,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:40:00,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash -516877822, now seen corresponding path program 1 times [2023-11-17 15:40:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:00,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553644274] [2023-11-17 15:40:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:00,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:00,476 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 15:40:00,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:40:00,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553644274] [2023-11-17 15:40:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553644274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:40:00,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:40:00,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:40:00,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986843981] [2023-11-17 15:40:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:40:00,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:40:00,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:40:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:40:00,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:40:00,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 535 [2023-11-17 15:40:00,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 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 15:40:00,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:40:00,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 535 [2023-11-17 15:40:00,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:40:02,279 INFO L124 PetriNetUnfolderBase]: 14945/23746 cut-off events. [2023-11-17 15:40:02,279 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2023-11-17 15:40:02,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47470 conditions, 23746 events. 14945/23746 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 166208 event pairs, 4653 based on Foata normal form. 0/21088 useless extension candidates. Maximal degree in co-relation 47352. Up to 14708 conditions per place. [2023-11-17 15:40:02,401 INFO L140 encePairwiseOnDemand]: 522/535 looper letters, 130 selfloop transitions, 13 changer transitions 9/161 dead transitions. [2023-11-17 15:40:02,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 161 transitions, 680 flow [2023-11-17 15:40:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:40:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:40:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 818 transitions. [2023-11-17 15:40:02,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3822429906542056 [2023-11-17 15:40:02,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 818 transitions. [2023-11-17 15:40:02,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 818 transitions. [2023-11-17 15:40:02,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:40:02,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 818 transitions. [2023-11-17 15:40:02,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.5) internal successors, (818), 4 states have internal predecessors, (818), 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 15:40:02,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 535.0) internal successors, (2675), 5 states have internal predecessors, (2675), 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 15:40:02,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 535.0) internal successors, (2675), 5 states have internal predecessors, (2675), 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 15:40:02,412 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 162 flow. Second operand 4 states and 818 transitions. [2023-11-17 15:40:02,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 161 transitions, 680 flow [2023-11-17 15:40:02,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 161 transitions, 677 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:40:02,421 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 266 flow [2023-11-17 15:40:02,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2023-11-17 15:40:02,424 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-11-17 15:40:02,424 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 266 flow [2023-11-17 15:40:02,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 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 15:40:02,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:02,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:40:02,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:40:02,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:40:02,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:02,425 INFO L85 PathProgramCache]: Analyzing trace with hash -20737002, now seen corresponding path program 1 times [2023-11-17 15:40:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:02,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326497012] [2023-11-17 15:40:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:02,582 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 15:40:02,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:40:02,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326497012] [2023-11-17 15:40:02,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326497012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:40:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986487271] [2023-11-17 15:40:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:02,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:40:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:40:02,599 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 15:40:02,624 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 15:40:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:02,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:40:02,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:40:02,844 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 15:40:02,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:40:02,864 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 15:40:02,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986487271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:40:02,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:40:02,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-17 15:40:02,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875698361] [2023-11-17 15:40:02,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:40:02,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:40:02,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:40:02,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:40:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-17 15:40:02,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 535 [2023-11-17 15:40:02,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 207.16666666666666) internal successors, (1243), 6 states have internal predecessors, (1243), 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 15:40:02,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:40:02,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 535 [2023-11-17 15:40:02,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:40:03,226 INFO L124 PetriNetUnfolderBase]: 1567/2949 cut-off events. [2023-11-17 15:40:03,231 INFO L125 PetriNetUnfolderBase]: For 1196/1196 co-relation queries the response was YES. [2023-11-17 15:40:03,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 2949 events. 1567/2949 cut-off events. For 1196/1196 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18722 event pairs, 34 based on Foata normal form. 347/3191 useless extension candidates. Maximal degree in co-relation 2351. Up to 1886 conditions per place. [2023-11-17 15:40:03,252 INFO L140 encePairwiseOnDemand]: 532/535 looper letters, 97 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2023-11-17 15:40:03,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 106 transitions, 538 flow [2023-11-17 15:40:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:40:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:40:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1114 transitions. [2023-11-17 15:40:03,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164485981308411 [2023-11-17 15:40:03,257 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1114 transitions. [2023-11-17 15:40:03,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1114 transitions. [2023-11-17 15:40:03,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:40:03,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1114 transitions. [2023-11-17 15:40:03,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.8) internal successors, (1114), 5 states have internal predecessors, (1114), 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 15:40:03,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 535.0) internal successors, (3210), 6 states have internal predecessors, (3210), 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 15:40:03,267 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 535.0) internal successors, (3210), 6 states have internal predecessors, (3210), 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 15:40:03,268 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 266 flow. Second operand 5 states and 1114 transitions. [2023-11-17 15:40:03,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 106 transitions, 538 flow [2023-11-17 15:40:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 106 transitions, 538 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:40:03,274 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 178 flow [2023-11-17 15:40:03,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-17 15:40:03,276 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-11-17 15:40:03,276 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 178 flow [2023-11-17 15:40:03,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 207.16666666666666) internal successors, (1243), 6 states have internal predecessors, (1243), 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 15:40:03,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:03,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:40:03,292 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 15:40:03,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:40:03,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:40:03,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash 985433293, now seen corresponding path program 1 times [2023-11-17 15:40:03,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:03,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576168225] [2023-11-17 15:40:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:40:03,518 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:40:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:40:03,542 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:40:03,542 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:40:03,542 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:40:03,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:40:03,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:40:03,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:40:03,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:40:03,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:40:03,548 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:40:03,549 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:40:03,549 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:40:03,593 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:40:03,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 345 transitions, 717 flow [2023-11-17 15:40:03,713 INFO L124 PetriNetUnfolderBase]: 106/669 cut-off events. [2023-11-17 15:40:03,714 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:40:03,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 669 events. 106/669 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2953 event pairs, 1 based on Foata normal form. 0/552 useless extension candidates. Maximal degree in co-relation 472. Up to 16 conditions per place. [2023-11-17 15:40:03,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 345 transitions, 717 flow [2023-11-17 15:40:03,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 296 places, 343 transitions, 713 flow [2023-11-17 15:40:03,733 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:40:03,733 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 296 places, 343 transitions, 713 flow [2023-11-17 15:40:03,734 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 296 places, 343 transitions, 713 flow [2023-11-17 15:40:03,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 343 transitions, 713 flow [2023-11-17 15:40:03,829 INFO L124 PetriNetUnfolderBase]: 105/667 cut-off events. [2023-11-17 15:40:03,829 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:40:03,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 667 events. 105/667 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2976 event pairs, 1 based on Foata normal form. 0/551 useless extension candidates. Maximal degree in co-relation 470. Up to 16 conditions per place. [2023-11-17 15:40:03,868 INFO L119 LiptonReduction]: Number of co-enabled transitions 58590 [2023-11-17 15:40:10,959 INFO L134 LiptonReduction]: Checked pairs total: 108536 [2023-11-17 15:40:10,959 INFO L136 LiptonReduction]: Total number of compositions: 309 [2023-11-17 15:40:10,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:40:10,962 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;@4a342134, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:40:10,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:40:10,965 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:40:10,965 INFO L124 PetriNetUnfolderBase]: 10/31 cut-off events. [2023-11-17 15:40:10,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:40:10,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:10,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:40:10,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:40:10,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:10,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2115621005, now seen corresponding path program 1 times [2023-11-17 15:40:10,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:10,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384323231] [2023-11-17 15:40:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:10,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:11,028 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 15:40:11,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:40:11,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384323231] [2023-11-17 15:40:11,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384323231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:40:11,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:40:11,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:40:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819251981] [2023-11-17 15:40:11,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:40:11,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:40:11,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:40:11,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:40:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:40:11,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 654 [2023-11-17 15:40:11,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 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 15:40:11,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:40:11,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 654 [2023-11-17 15:40:11,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:40:34,839 INFO L124 PetriNetUnfolderBase]: 284712/392381 cut-off events. [2023-11-17 15:40:34,840 INFO L125 PetriNetUnfolderBase]: For 3780/3780 co-relation queries the response was YES. [2023-11-17 15:40:35,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767265 conditions, 392381 events. 284712/392381 cut-off events. For 3780/3780 co-relation queries the response was YES. Maximal size of possible extension queue 8650. Compared 2928736 event pairs, 178193 based on Foata normal form. 45124/380487 useless extension candidates. Maximal degree in co-relation 35783. Up to 372788 conditions per place. [2023-11-17 15:40:37,002 INFO L140 encePairwiseOnDemand]: 608/654 looper letters, 89 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-11-17 15:40:37,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 105 transitions, 419 flow [2023-11-17 15:40:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:40:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:40:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2023-11-17 15:40:37,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45310907237512743 [2023-11-17 15:40:37,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2023-11-17 15:40:37,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2023-11-17 15:40:37,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:40:37,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2023-11-17 15:40:37,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 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 15:40:37,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 654.0) internal successors, (2616), 4 states have internal predecessors, (2616), 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 15:40:37,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 654.0) internal successors, (2616), 4 states have internal predecessors, (2616), 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 15:40:37,015 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 289 flow. Second operand 3 states and 889 transitions. [2023-11-17 15:40:37,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 105 transitions, 419 flow [2023-11-17 15:40:37,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 105 transitions, 419 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:40:37,022 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 215 flow [2023-11-17 15:40:37,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-11-17 15:40:37,024 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-11-17 15:40:37,025 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 215 flow [2023-11-17 15:40:37,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 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 15:40:37,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:37,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:40:37,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:40:37,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:40:37,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash 826668519, now seen corresponding path program 1 times [2023-11-17 15:40:37,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:37,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119309957] [2023-11-17 15:40:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:37,142 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 15:40:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:40:37,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119309957] [2023-11-17 15:40:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119309957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:40:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:40:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:40:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474225660] [2023-11-17 15:40:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:40:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:40:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:40:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:40:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:40:37,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 654 [2023-11-17 15:40:37,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 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 15:40:37,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:40:37,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 654 [2023-11-17 15:40:37,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:41:16,535 INFO L124 PetriNetUnfolderBase]: 460953/637858 cut-off events. [2023-11-17 15:41:16,535 INFO L125 PetriNetUnfolderBase]: For 21019/21019 co-relation queries the response was YES. [2023-11-17 15:41:17,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276551 conditions, 637858 events. 460953/637858 cut-off events. For 21019/21019 co-relation queries the response was YES. Maximal size of possible extension queue 14799. Compared 5057132 event pairs, 113264 based on Foata normal form. 0/571011 useless extension candidates. Maximal degree in co-relation 1276432. Up to 394907 conditions per place. [2023-11-17 15:41:19,757 INFO L140 encePairwiseOnDemand]: 637/654 looper letters, 184 selfloop transitions, 18 changer transitions 0/213 dead transitions. [2023-11-17 15:41:19,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 213 transitions, 915 flow [2023-11-17 15:41:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:41:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:41:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1022 transitions. [2023-11-17 15:41:19,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39067278287461776 [2023-11-17 15:41:19,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1022 transitions. [2023-11-17 15:41:19,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1022 transitions. [2023-11-17 15:41:19,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:41:19,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1022 transitions. [2023-11-17 15:41:19,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 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 15:41:19,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 654.0) internal successors, (3270), 5 states have internal predecessors, (3270), 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 15:41:19,776 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 654.0) internal successors, (3270), 5 states have internal predecessors, (3270), 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 15:41:19,776 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 215 flow. Second operand 4 states and 1022 transitions. [2023-11-17 15:41:19,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 213 transitions, 915 flow [2023-11-17 15:41:19,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 213 transitions, 912 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:41:19,796 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 357 flow [2023-11-17 15:41:19,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=357, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2023-11-17 15:41:19,798 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 8 predicate places. [2023-11-17 15:41:19,798 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 357 flow [2023-11-17 15:41:19,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 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 15:41:19,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:41:19,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:41:19,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:41:19,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:41:19,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:41:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash 672757672, now seen corresponding path program 1 times [2023-11-17 15:41:19,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:41:19,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235846797] [2023-11-17 15:41:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:41:19,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:41:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:41:19,847 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 15:41:19,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:41:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235846797] [2023-11-17 15:41:19,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235846797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:41:19,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058875515] [2023-11-17 15:41:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:41:19,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:41:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:41:19,851 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 15:41:19,876 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 15:41:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:41:19,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:41:19,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:41:20,007 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 15:41:20,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:41:20,022 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 15:41:20,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058875515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:41:20,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:41:20,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-17 15:41:20,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952178192] [2023-11-17 15:41:20,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:41:20,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:41:20,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:41:20,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:41:20,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-17 15:41:20,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 654 [2023-11-17 15:41:20,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 357 flow. Second operand has 6 states, 6 states have (on average 250.16666666666666) internal successors, (1501), 6 states have internal predecessors, (1501), 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 15:41:20,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:41:20,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 654 [2023-11-17 15:41:20,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:41:24,162 INFO L124 PetriNetUnfolderBase]: 46817/71563 cut-off events. [2023-11-17 15:41:24,163 INFO L125 PetriNetUnfolderBase]: For 38862/38862 co-relation queries the response was YES. [2023-11-17 15:41:24,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169556 conditions, 71563 events. 46817/71563 cut-off events. For 38862/38862 co-relation queries the response was YES. Maximal size of possible extension queue 2626. Compared 563447 event pairs, 1419 based on Foata normal form. 6431/75022 useless extension candidates. Maximal degree in co-relation 50544. Up to 46127 conditions per place. [2023-11-17 15:41:24,546 INFO L140 encePairwiseOnDemand]: 651/654 looper letters, 178 selfloop transitions, 4 changer transitions 0/192 dead transitions. [2023-11-17 15:41:24,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 192 transitions, 1002 flow [2023-11-17 15:41:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:41:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:41:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1641 transitions. [2023-11-17 15:41:24,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181957186544342 [2023-11-17 15:41:24,550 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1641 transitions. [2023-11-17 15:41:24,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1641 transitions. [2023-11-17 15:41:24,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:41:24,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1641 transitions. [2023-11-17 15:41:24,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 273.5) internal successors, (1641), 6 states have internal predecessors, (1641), 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 15:41:24,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 654.0) internal successors, (4578), 7 states have internal predecessors, (4578), 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 15:41:24,560 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 654.0) internal successors, (4578), 7 states have internal predecessors, (4578), 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 15:41:24,560 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 357 flow. Second operand 6 states and 1641 transitions. [2023-11-17 15:41:24,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 192 transitions, 1002 flow [2023-11-17 15:41:24,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 192 transitions, 1000 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 15:41:24,573 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 276 flow [2023-11-17 15:41:24,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=654, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=276, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-11-17 15:41:24,574 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -8 predicate places. [2023-11-17 15:41:24,574 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 276 flow [2023-11-17 15:41:24,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 250.16666666666666) internal successors, (1501), 6 states have internal predecessors, (1501), 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 15:41:24,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:41:24,575 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:41:24,581 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 15:41:24,780 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,SelfDestructingSolverStorable8 [2023-11-17 15:41:24,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:41:24,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:41:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1589127399, now seen corresponding path program 1 times [2023-11-17 15:41:24,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:41:24,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399325201] [2023-11-17 15:41:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:41:24,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:41:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:41:24,807 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:41:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:41:24,834 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:41:24,834 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:41:24,834 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:41:24,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:41:24,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:41:24,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:41:24,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:41:24,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:41:24,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:41:24,836 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:41:24,836 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:41:24,836 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:41:24,868 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:41:24,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 410 transitions, 860 flow [2023-11-17 15:41:25,013 INFO L124 PetriNetUnfolderBase]: 152/946 cut-off events. [2023-11-17 15:41:25,014 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:41:25,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 946 events. 152/946 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4493 event pairs, 6 based on Foata normal form. 0/785 useless extension candidates. Maximal degree in co-relation 689. Up to 32 conditions per place. [2023-11-17 15:41:25,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 410 transitions, 860 flow [2023-11-17 15:41:25,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 350 places, 408 transitions, 856 flow [2023-11-17 15:41:25,045 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:41:25,045 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 350 places, 408 transitions, 856 flow [2023-11-17 15:41:25,045 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 350 places, 408 transitions, 856 flow [2023-11-17 15:41:25,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 350 places, 408 transitions, 856 flow [2023-11-17 15:41:25,167 INFO L124 PetriNetUnfolderBase]: 151/944 cut-off events. [2023-11-17 15:41:25,167 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:41:25,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995 conditions, 944 events. 151/944 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4502 event pairs, 6 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 687. Up to 32 conditions per place. [2023-11-17 15:41:25,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 94752 [2023-11-17 15:41:33,415 INFO L134 LiptonReduction]: Checked pairs total: 189720 [2023-11-17 15:41:33,415 INFO L136 LiptonReduction]: Total number of compositions: 366 [2023-11-17 15:41:33,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:41:33,417 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;@4a342134, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:41:33,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:41:33,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:41:33,419 INFO L124 PetriNetUnfolderBase]: 9/30 cut-off events. [2023-11-17 15:41:33,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:41:33,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:41:33,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:41:33,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:41:33,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:41:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1377274510, now seen corresponding path program 1 times [2023-11-17 15:41:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:41:33,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462867586] [2023-11-17 15:41:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:41:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:41:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:41:33,461 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 15:41:33,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:41:33,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462867586] [2023-11-17 15:41:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462867586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:41:33,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:41:33,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:41:33,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917781319] [2023-11-17 15:41:33,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:41:33,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:41:33,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:41:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:41:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:41:33,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 776 [2023-11-17 15:41:33,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 159 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 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 15:41:33,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:41:33,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 776 [2023-11-17 15:41:33,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand