/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/pthread-ext/09_fmaxsym.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:06:38,585 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:06:38,639 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 15:06:38,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:06:38,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:06:38,671 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:06:38,672 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:06:38,672 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:06:38,672 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:06:38,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:06:38,675 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:06:38,676 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:06:38,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:06:38,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:06:38,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:06:38,677 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:06:38,677 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:06:38,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:06:38,678 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:06:38,678 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:06:38,678 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:06:38,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:06:38,679 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:06:38,679 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:06:38,679 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:06:38,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:06:38,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:06:38,680 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:06:38,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:06:38,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:06:38,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:06:38,682 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:06:38,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:06:38,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:06:38,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:06:38,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:06:38,891 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:06:38,892 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:06:38,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-11-17 15:06:39,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:06:39,980 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:06:39,981 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-11-17 15:06:39,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77af51d3/d1f3516289a14452b60193bb204c7533/FLAG946f2de91 [2023-11-17 15:06:40,000 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77af51d3/d1f3516289a14452b60193bb204c7533 [2023-11-17 15:06:40,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:06:40,003 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:06:40,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:06:40,006 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:06:40,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:06:40,011 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,012 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3eae6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40, skipping insertion in model container [2023-11-17 15:06:40,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,042 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:06:40,241 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30453,30466] [2023-11-17 15:06:40,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:06:40,264 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:06:40,295 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30453,30466] [2023-11-17 15:06:40,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:06:40,322 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:06:40,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40 WrapperNode [2023-11-17 15:06:40,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:06:40,324 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:06:40,324 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:06:40,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:06:40,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,366 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 91 [2023-11-17 15:06:40,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:06:40,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:06:40,367 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:06:40,367 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:06:40,372 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,375 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,375 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:06:40,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:06:40,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:06:40,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:06:40,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (1/1) ... [2023-11-17 15:06:40,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:06:40,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:06:40,418 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 15:06:40,444 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 15:06:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:06:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:06:40,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:06:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:06:40,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:06:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:06:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:06:40,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:06:40,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:06:40,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:06:40,467 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 15:06:40,563 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:06:40,564 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:06:40,779 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:06:40,852 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:06:40,852 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:06:40,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:06:40 BoogieIcfgContainer [2023-11-17 15:06:40,853 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:06:40,855 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:06:40,855 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:06:40,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:06:40,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:06:40" (1/3) ... [2023-11-17 15:06:40,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430917ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:06:40, skipping insertion in model container [2023-11-17 15:06:40,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:40" (2/3) ... [2023-11-17 15:06:40,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430917ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:06:40, skipping insertion in model container [2023-11-17 15:06:40,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:06:40" (3/3) ... [2023-11-17 15:06:40,861 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2023-11-17 15:06:40,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:06:40,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:06:40,875 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:06:40,929 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:40,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 160 flow [2023-11-17 15:06:40,997 INFO L124 PetriNetUnfolderBase]: 7/89 cut-off events. [2023-11-17 15:06:40,997 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:41,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 89 events. 7/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-11-17 15:06:41,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 160 flow [2023-11-17 15:06:41,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 160 flow [2023-11-17 15:06:41,011 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:41,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 78 transitions, 160 flow [2023-11-17 15:06:41,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 78 transitions, 160 flow [2023-11-17 15:06:41,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 160 flow [2023-11-17 15:06:41,041 INFO L124 PetriNetUnfolderBase]: 7/89 cut-off events. [2023-11-17 15:06:41,042 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:41,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 89 events. 7/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2023-11-17 15:06:41,043 INFO L119 LiptonReduction]: Number of co-enabled transitions 1232 [2023-11-17 15:06:43,111 INFO L134 LiptonReduction]: Checked pairs total: 1218 [2023-11-17 15:06:43,111 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-11-17 15:06:43,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:43,127 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;@4e7e481d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:43,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:06:43,130 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:43,130 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-17 15:06:43,130 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:43,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:43,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:06:43,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:06:43,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 417398448, now seen corresponding path program 1 times [2023-11-17 15:06:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:43,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681565421] [2023-11-17 15:06:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:43,274 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 15:06:43,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:43,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681565421] [2023-11-17 15:06:43,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681565421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:43,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:43,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:06:43,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076397315] [2023-11-17 15:06:43,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:43,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:06:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:06:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:06:43,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 163 [2023-11-17 15:06:43,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 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 15:06:43,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:43,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 163 [2023-11-17 15:06:43,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:43,332 INFO L124 PetriNetUnfolderBase]: 7/20 cut-off events. [2023-11-17 15:06:43,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:43,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 4 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-11-17 15:06:43,334 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-17 15:06:43,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 15:06:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:06:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:06:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 143 transitions. [2023-11-17 15:06:43,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386503067484663 [2023-11-17 15:06:43,346 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 143 transitions. [2023-11-17 15:06:43,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 143 transitions. [2023-11-17 15:06:43,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:43,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 143 transitions. [2023-11-17 15:06:43,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 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 15:06:43,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 15:06:43,359 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 15:06:43,360 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 2 states and 143 transitions. [2023-11-17 15:06:43,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 15:06:43,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:43,364 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 20 flow [2023-11-17 15:06:43,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-11-17 15:06:43,369 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-11-17 15:06:43,369 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 20 flow [2023-11-17 15:06:43,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 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 15:06:43,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:43,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:06:43,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:06:43,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:06:43,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash 54397034, now seen corresponding path program 1 times [2023-11-17 15:06:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:43,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300805404] [2023-11-17 15:06:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:43,404 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:43,463 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:43,463 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:43,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:06:43,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:06:43,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:06:43,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:06:43,466 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:06:43,468 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:43,468 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:06:43,493 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:43,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 123 transitions, 256 flow [2023-11-17 15:06:43,512 INFO L124 PetriNetUnfolderBase]: 13/147 cut-off events. [2023-11-17 15:06:43,513 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:06:43,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 13/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 244 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2023-11-17 15:06:43,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 123 transitions, 256 flow [2023-11-17 15:06:43,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 123 transitions, 256 flow [2023-11-17 15:06:43,515 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:43,515 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 123 transitions, 256 flow [2023-11-17 15:06:43,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 123 transitions, 256 flow [2023-11-17 15:06:43,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 123 transitions, 256 flow [2023-11-17 15:06:43,531 INFO L124 PetriNetUnfolderBase]: 13/147 cut-off events. [2023-11-17 15:06:43,531 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:06:43,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 13/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 244 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2023-11-17 15:06:43,535 INFO L119 LiptonReduction]: Number of co-enabled transitions 6424 [2023-11-17 15:06:45,241 INFO L134 LiptonReduction]: Checked pairs total: 13108 [2023-11-17 15:06:45,241 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-11-17 15:06:45,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:45,243 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;@4e7e481d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:45,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:06:45,246 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:45,247 INFO L124 PetriNetUnfolderBase]: 3/29 cut-off events. [2023-11-17 15:06:45,247 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:06:45,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:45,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:45,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:06:45,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash 637798171, now seen corresponding path program 1 times [2023-11-17 15:06:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:45,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352936687] [2023-11-17 15:06:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:45,311 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 15:06:45,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352936687] [2023-11-17 15:06:45,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352936687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:45,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:45,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:45,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043587029] [2023-11-17 15:06:45,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:45,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:45,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:45,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:45,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:45,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 233 [2023-11-17 15:06:45,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 15:06:45,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:45,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 233 [2023-11-17 15:06:45,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:45,464 INFO L124 PetriNetUnfolderBase]: 653/1060 cut-off events. [2023-11-17 15:06:45,465 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-17 15:06:45,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 1060 events. 653/1060 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5195 event pairs, 243 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1522. Up to 646 conditions per place. [2023-11-17 15:06:45,470 INFO L140 encePairwiseOnDemand]: 223/233 looper letters, 43 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2023-11-17 15:06:45,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 52 transitions, 217 flow [2023-11-17 15:06:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:06:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:06:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-11-17 15:06:45,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45779685264663805 [2023-11-17 15:06:45,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-11-17 15:06:45,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-11-17 15:06:45,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:45,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-11-17 15:06:45,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 15:06:45,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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 15:06:45,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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 15:06:45,480 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 78 flow. Second operand 3 states and 320 transitions. [2023-11-17 15:06:45,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 52 transitions, 217 flow [2023-11-17 15:06:45,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 52 transitions, 217 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:45,483 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 114 flow [2023-11-17 15:06:45,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-17 15:06:45,483 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-11-17 15:06:45,484 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 114 flow [2023-11-17 15:06:45,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 15:06:45,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:45,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:06:45,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:06:45,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:06:45,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1868443233, now seen corresponding path program 1 times [2023-11-17 15:06:45,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:45,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326612858] [2023-11-17 15:06:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:45,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:45,513 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:45,523 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:45,524 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:45,524 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:06:45,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:06:45,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:06:45,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:06:45,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:06:45,524 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:06:45,525 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:45,525 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:06:45,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:45,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 168 transitions, 354 flow [2023-11-17 15:06:45,557 INFO L124 PetriNetUnfolderBase]: 19/205 cut-off events. [2023-11-17 15:06:45,557 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:06:45,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 205 events. 19/205 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 494 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 151. Up to 8 conditions per place. [2023-11-17 15:06:45,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 168 transitions, 354 flow [2023-11-17 15:06:45,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 168 transitions, 354 flow [2023-11-17 15:06:45,560 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:45,560 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 168 transitions, 354 flow [2023-11-17 15:06:45,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 168 transitions, 354 flow [2023-11-17 15:06:45,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 168 transitions, 354 flow [2023-11-17 15:06:45,574 INFO L124 PetriNetUnfolderBase]: 19/205 cut-off events. [2023-11-17 15:06:45,574 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:06:45,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 205 events. 19/205 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 494 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 151. Up to 8 conditions per place. [2023-11-17 15:06:45,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 15576 [2023-11-17 15:06:47,802 INFO L134 LiptonReduction]: Checked pairs total: 33391 [2023-11-17 15:06:47,802 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-11-17 15:06:47,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:47,805 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;@4e7e481d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:47,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:06:47,807 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:47,807 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2023-11-17 15:06:47,807 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:06:47,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:47,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:47,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:06:47,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1910855369, now seen corresponding path program 1 times [2023-11-17 15:06:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:47,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788319055] [2023-11-17 15:06:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:47,849 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 15:06:47,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788319055] [2023-11-17 15:06:47,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788319055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:47,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:47,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:47,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495393323] [2023-11-17 15:06:47,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:47,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:47,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:47,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 322 [2023-11-17 15:06:47,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 15:06:47,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:47,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 322 [2023-11-17 15:06:47,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:48,834 INFO L124 PetriNetUnfolderBase]: 11630/15960 cut-off events. [2023-11-17 15:06:48,834 INFO L125 PetriNetUnfolderBase]: For 1132/1132 co-relation queries the response was YES. [2023-11-17 15:06:48,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32542 conditions, 15960 events. 11630/15960 cut-off events. For 1132/1132 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 91305 event pairs, 5289 based on Foata normal form. 0/12645 useless extension candidates. Maximal degree in co-relation 14588. Up to 10748 conditions per place. [2023-11-17 15:06:48,940 INFO L140 encePairwiseOnDemand]: 311/322 looper letters, 67 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-11-17 15:06:48,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 77 transitions, 332 flow [2023-11-17 15:06:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:06:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:06:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-11-17 15:06:48,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453416149068323 [2023-11-17 15:06:48,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-11-17 15:06:48,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-11-17 15:06:48,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:48,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-11-17 15:06:48,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 15:06:48,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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 15:06:48,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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 15:06:48,946 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 112 flow. Second operand 3 states and 438 transitions. [2023-11-17 15:06:48,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 77 transitions, 332 flow [2023-11-17 15:06:48,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 77 transitions, 328 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:48,950 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 154 flow [2023-11-17 15:06:48,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-11-17 15:06:48,951 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-11-17 15:06:48,951 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 154 flow [2023-11-17 15:06:48,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 15:06:48,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:48,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:48,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:06:48,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:06:48,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 289368851, now seen corresponding path program 1 times [2023-11-17 15:06:48,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:48,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90419600] [2023-11-17 15:06:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:48,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:06:49,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90419600] [2023-11-17 15:06:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90419600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:49,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:49,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:49,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167463000] [2023-11-17 15:06:49,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:49,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:49,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:49,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 322 [2023-11-17 15:06:49,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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 15:06:49,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:49,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 322 [2023-11-17 15:06:49,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:50,400 INFO L124 PetriNetUnfolderBase]: 16734/22884 cut-off events. [2023-11-17 15:06:50,401 INFO L125 PetriNetUnfolderBase]: For 6920/6920 co-relation queries the response was YES. [2023-11-17 15:06:50,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52731 conditions, 22884 events. 16734/22884 cut-off events. For 6920/6920 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 132965 event pairs, 7218 based on Foata normal form. 0/19035 useless extension candidates. Maximal degree in co-relation 41017. Up to 15223 conditions per place. [2023-11-17 15:06:50,535 INFO L140 encePairwiseOnDemand]: 314/322 looper letters, 73 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2023-11-17 15:06:50,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 85 transitions, 429 flow [2023-11-17 15:06:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:06:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:06:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-17 15:06:50,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44616977225672877 [2023-11-17 15:06:50,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-17 15:06:50,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-17 15:06:50,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:50,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-17 15:06:50,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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 15:06:50,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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 15:06:50,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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 15:06:50,540 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 154 flow. Second operand 3 states and 431 transitions. [2023-11-17 15:06:50,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 85 transitions, 429 flow [2023-11-17 15:06:50,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 85 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:06:50,560 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 208 flow [2023-11-17 15:06:50,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2023-11-17 15:06:50,563 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2023-11-17 15:06:50,563 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 208 flow [2023-11-17 15:06:50,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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 15:06:50,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:50,564 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:06:50,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:06:50,564 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:06:50,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1422786838, now seen corresponding path program 1 times [2023-11-17 15:06:50,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:50,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610955203] [2023-11-17 15:06:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:50,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:50,590 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:50,608 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:50,608 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:50,608 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:06:50,608 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:06:50,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:06:50,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:06:50,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:06:50,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:06:50,610 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:06:50,610 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:50,611 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:06:50,632 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:50,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 213 transitions, 454 flow [2023-11-17 15:06:50,662 INFO L124 PetriNetUnfolderBase]: 25/263 cut-off events. [2023-11-17 15:06:50,663 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:06:50,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 263 events. 25/263 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 742 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 213. Up to 10 conditions per place. [2023-11-17 15:06:50,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 213 transitions, 454 flow [2023-11-17 15:06:50,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 213 transitions, 454 flow [2023-11-17 15:06:50,667 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:50,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 213 transitions, 454 flow [2023-11-17 15:06:50,668 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 213 transitions, 454 flow [2023-11-17 15:06:50,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 213 transitions, 454 flow [2023-11-17 15:06:50,688 INFO L124 PetriNetUnfolderBase]: 25/263 cut-off events. [2023-11-17 15:06:50,688 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:06:50,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 263 events. 25/263 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 742 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 213. Up to 10 conditions per place. [2023-11-17 15:06:50,702 INFO L119 LiptonReduction]: Number of co-enabled transitions 28688 [2023-11-17 15:06:53,456 INFO L134 LiptonReduction]: Checked pairs total: 61951 [2023-11-17 15:06:53,456 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-11-17 15:06:53,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:53,458 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;@4e7e481d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:53,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:06:53,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:53,460 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2023-11-17 15:06:53,460 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:06:53,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:53,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:53,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:06:53,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:53,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1617071366, now seen corresponding path program 1 times [2023-11-17 15:06:53,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:53,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126152043] [2023-11-17 15:06:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:53,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:53,498 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 15:06:53,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:53,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126152043] [2023-11-17 15:06:53,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126152043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:53,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:53,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:53,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160059938] [2023-11-17 15:06:53,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:53,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:53,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 412 [2023-11-17 15:06:53,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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 15:06:53,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:53,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 412 [2023-11-17 15:06:53,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:05,418 INFO L124 PetriNetUnfolderBase]: 179538/227710 cut-off events. [2023-11-17 15:07:05,418 INFO L125 PetriNetUnfolderBase]: For 22812/22812 co-relation queries the response was YES. [2023-11-17 15:07:06,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464438 conditions, 227710 events. 179538/227710 cut-off events. For 22812/22812 co-relation queries the response was YES. Maximal size of possible extension queue 7068. Compared 1395656 event pairs, 87363 based on Foata normal form. 0/178252 useless extension candidates. Maximal degree in co-relation 32507. Up to 155416 conditions per place. [2023-11-17 15:07:07,012 INFO L140 encePairwiseOnDemand]: 398/412 looper letters, 92 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2023-11-17 15:07:07,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 455 flow [2023-11-17 15:07:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-11-17 15:07:07,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4538834951456311 [2023-11-17 15:07:07,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-11-17 15:07:07,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-11-17 15:07:07,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:07,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-11-17 15:07:07,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 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 15:07:07,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 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 15:07:07,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 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 15:07:07,018 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 152 flow. Second operand 3 states and 561 transitions. [2023-11-17 15:07:07,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 455 flow [2023-11-17 15:07:07,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 103 transitions, 443 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:07,026 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 194 flow [2023-11-17 15:07:07,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-11-17 15:07:07,027 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-11-17 15:07:07,027 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 194 flow [2023-11-17 15:07:07,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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 15:07:07,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:07,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:07,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:07:07,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:07,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:07,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1563351343, now seen corresponding path program 1 times [2023-11-17 15:07:07,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:07,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241269339] [2023-11-17 15:07:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:07,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:07:07,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241269339] [2023-11-17 15:07:07,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241269339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:07,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:07,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:07,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804424983] [2023-11-17 15:07:07,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:07,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:07,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:07,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:07,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:07,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 412 [2023-11-17 15:07:07,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 15:07:07,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:07,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 412 [2023-11-17 15:07:07,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:26,611 INFO L124 PetriNetUnfolderBase]: 278609/352327 cut-off events. [2023-11-17 15:07:26,611 INFO L125 PetriNetUnfolderBase]: For 98171/98171 co-relation queries the response was YES. [2023-11-17 15:07:27,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797681 conditions, 352327 events. 278609/352327 cut-off events. For 98171/98171 co-relation queries the response was YES. Maximal size of possible extension queue 10975. Compared 2232852 event pairs, 123163 based on Foata normal form. 0/288003 useless extension candidates. Maximal degree in co-relation 617960. Up to 227052 conditions per place. [2023-11-17 15:07:29,175 INFO L140 encePairwiseOnDemand]: 403/412 looper letters, 100 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2023-11-17 15:07:29,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 114 transitions, 568 flow [2023-11-17 15:07:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2023-11-17 15:07:29,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4457928802588997 [2023-11-17 15:07:29,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2023-11-17 15:07:29,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2023-11-17 15:07:29,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:29,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2023-11-17 15:07:29,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 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 15:07:29,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 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 15:07:29,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 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 15:07:29,192 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 194 flow. Second operand 3 states and 551 transitions. [2023-11-17 15:07:29,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 114 transitions, 568 flow [2023-11-17 15:07:31,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 114 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:07:31,219 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 266 flow [2023-11-17 15:07:31,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2023-11-17 15:07:31,219 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2023-11-17 15:07:31,219 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 266 flow [2023-11-17 15:07:31,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 15:07:31,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:31,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:31,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:07:31,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:31,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1024528034, now seen corresponding path program 1 times [2023-11-17 15:07:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:31,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707656384] [2023-11-17 15:07:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:07:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707656384] [2023-11-17 15:07:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707656384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:31,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:31,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136484487] [2023-11-17 15:07:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:31,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:31,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:31,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 412 [2023-11-17 15:07:31,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 15:07:31,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:31,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 412 [2023-11-17 15:07:31,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:59,980 INFO L124 PetriNetUnfolderBase]: 403827/508985 cut-off events. [2023-11-17 15:07:59,980 INFO L125 PetriNetUnfolderBase]: For 238469/238469 co-relation queries the response was YES. [2023-11-17 15:08:01,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1223356 conditions, 508985 events. 403827/508985 cut-off events. For 238469/238469 co-relation queries the response was YES. Maximal size of possible extension queue 15861. Compared 3263144 event pairs, 181993 based on Foata normal form. 0/437105 useless extension candidates. Maximal degree in co-relation 951344. Up to 344912 conditions per place. [2023-11-17 15:08:03,685 INFO L140 encePairwiseOnDemand]: 403/412 looper letters, 107 selfloop transitions, 16 changer transitions 0/126 dead transitions. [2023-11-17 15:08:03,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 126 transitions, 709 flow [2023-11-17 15:08:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:08:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:08:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-17 15:08:03,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441747572815534 [2023-11-17 15:08:03,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-17 15:08:03,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-17 15:08:03,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:03,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-17 15:08:03,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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 15:08:03,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 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 15:08:03,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 412.0) internal successors, (1648), 4 states have internal predecessors, (1648), 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 15:08:03,692 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 266 flow. Second operand 3 states and 549 transitions. [2023-11-17 15:08:03,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 126 transitions, 709 flow [2023-11-17 15:08:10,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 126 transitions, 669 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:08:10,282 INFO L231 Difference]: Finished difference. Result has 66 places, 82 transitions, 386 flow [2023-11-17 15:08:10,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=386, PETRI_PLACES=66, PETRI_TRANSITIONS=82} [2023-11-17 15:08:10,282 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-11-17 15:08:10,282 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 82 transitions, 386 flow [2023-11-17 15:08:10,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 15:08:10,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:10,283 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:10,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:08:10,283 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:08:10,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1846333853, now seen corresponding path program 1 times [2023-11-17 15:08:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:10,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141688485] [2023-11-17 15:08:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:10,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:10,305 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:10,305 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:10,305 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:08:10,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:08:10,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:08:10,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:08:10,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:08:10,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:08:10,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:08:10,306 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:08:10,306 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:10,306 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:08:10,324 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:10,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 258 transitions, 556 flow [2023-11-17 15:08:10,380 INFO L124 PetriNetUnfolderBase]: 31/321 cut-off events. [2023-11-17 15:08:10,380 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:08:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 321 events. 31/321 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 993 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 276. Up to 12 conditions per place. [2023-11-17 15:08:10,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 258 transitions, 556 flow [2023-11-17 15:08:10,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 258 transitions, 556 flow [2023-11-17 15:08:10,384 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:10,384 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 258 transitions, 556 flow [2023-11-17 15:08:10,384 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 258 transitions, 556 flow [2023-11-17 15:08:10,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 258 transitions, 556 flow [2023-11-17 15:08:10,410 INFO L124 PetriNetUnfolderBase]: 31/321 cut-off events. [2023-11-17 15:08:10,410 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:08:10,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 321 events. 31/321 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 993 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 276. Up to 12 conditions per place. [2023-11-17 15:08:10,420 INFO L119 LiptonReduction]: Number of co-enabled transitions 45760 [2023-11-17 15:08:13,520 INFO L134 LiptonReduction]: Checked pairs total: 99099 [2023-11-17 15:08:13,521 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-11-17 15:08:13,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:13,522 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;@4e7e481d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:13,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:08:13,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:13,524 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2023-11-17 15:08:13,524 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:08:13,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:13,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:13,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:08:13,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1699934953, now seen corresponding path program 1 times [2023-11-17 15:08:13,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:13,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508799960] [2023-11-17 15:08:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:13,552 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 15:08:13,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:13,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508799960] [2023-11-17 15:08:13,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508799960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:13,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:13,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402425315] [2023-11-17 15:08:13,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:13,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:13,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:13,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:13,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:13,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 498 [2023-11-17 15:08:13,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 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 15:08:13,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:13,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 498 [2023-11-17 15:08:13,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand