/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:19:25,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:19:25,738 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:19:25,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:19:25,763 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:19:25,763 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:19:25,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:19:25,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:19:25,764 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:19:25,768 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:19:25,769 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:19:25,770 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:19:25,770 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:19:25,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:19:25,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:19:25,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:19:25,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:19:25,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:19:25,774 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:19:25,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:19:25,775 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:19:25,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:19:25,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:19:25,775 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:19:25,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:19:25,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:19:25,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:19:25,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:19:25,776 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:19:25,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:19:25,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:19:25,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:19:25,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:19:25,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:19:25,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:19:25,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:19:25,987 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:19:25,988 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:19:25,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-11-17 11:19:27,112 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:19:27,339 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:19:27,340 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-11-17 11:19:27,352 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b7641761/5b6c03a7f58d450faa9d5c4626a2738e/FLAG26dab8bb5 [2023-11-17 11:19:27,365 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b7641761/5b6c03a7f58d450faa9d5c4626a2738e [2023-11-17 11:19:27,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:19:27,369 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:19:27,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:19:27,372 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:19:27,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:19:27,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a98f490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27, skipping insertion in model container [2023-11-17 11:19:27,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,416 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:19:27,689 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/11_fmaxsymopt.i[30570,30583] [2023-11-17 11:19:27,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:19:27,703 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:19:27,736 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/11_fmaxsymopt.i[30570,30583] [2023-11-17 11:19:27,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:19:27,774 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:19:27,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27 WrapperNode [2023-11-17 11:19:27,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:19:27,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:19:27,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:19:27,776 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:19:27,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,822 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 96 [2023-11-17 11:19:27,822 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:19:27,823 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:19:27,823 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:19:27,823 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:19:27,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,831 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,832 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,835 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,839 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,841 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:19:27,842 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:19:27,842 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:19:27,842 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:19:27,842 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (1/1) ... [2023-11-17 11:19:27,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:19:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:19:27,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:19:27,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:19:27,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:19:27,905 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:19:27,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:19:27,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:19:27,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:19:27,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:19:27,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:19:27,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:19:27,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:19:27,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:19:27,907 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:19:28,042 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:19:28,044 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:19:28,184 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:19:28,323 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:19:28,323 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:19:28,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:19:28 BoogieIcfgContainer [2023-11-17 11:19:28,324 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:19:28,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:19:28,326 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:19:28,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:19:28,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:19:27" (1/3) ... [2023-11-17 11:19:28,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6896c749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:19:28, skipping insertion in model container [2023-11-17 11:19:28,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:27" (2/3) ... [2023-11-17 11:19:28,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6896c749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:19:28, skipping insertion in model container [2023-11-17 11:19:28,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:19:28" (3/3) ... [2023-11-17 11:19:28,330 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2023-11-17 11:19:28,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:19:28,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:19:28,343 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:19:28,378 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:28,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 21 transitions, 46 flow [2023-11-17 11:19:28,424 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-17 11:19:28,425 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:28,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 23 events. 3/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-11-17 11:19:28,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 21 transitions, 46 flow [2023-11-17 11:19:28,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 21 transitions, 46 flow [2023-11-17 11:19:28,432 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:28,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 21 transitions, 46 flow [2023-11-17 11:19:28,447 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 21 transitions, 46 flow [2023-11-17 11:19:28,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 21 transitions, 46 flow [2023-11-17 11:19:28,454 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-17 11:19:28,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:28,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 23 events. 3/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2023-11-17 11:19:28,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 120 [2023-11-17 11:19:29,340 INFO L134 LiptonReduction]: Checked pairs total: 210 [2023-11-17 11:19:29,341 INFO L136 LiptonReduction]: Total number of compositions: 18 [2023-11-17 11:19:29,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:29,358 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;@37ddf3de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:29,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:19:29,361 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:29,361 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 11:19:29,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:29,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:29,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:19:29,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:19:29,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:29,367 INFO L85 PathProgramCache]: Analyzing trace with hash 309006657, now seen corresponding path program 1 times [2023-11-17 11:19:29,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:29,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516351867] [2023-11-17 11:19:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:29,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:29,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:29,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516351867] [2023-11-17 11:19:29,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516351867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:29,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:29,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:29,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706912653] [2023-11-17 11:19:29,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:29,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:29,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:29,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2023-11-17 11:19:29,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:29,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:29,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2023-11-17 11:19:29,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:29,572 INFO L124 PetriNetUnfolderBase]: 7/19 cut-off events. [2023-11-17 11:19:29,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:29,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-11-17 11:19:29,574 INFO L140 encePairwiseOnDemand]: 37/39 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-17 11:19:29,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 11:19:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 19 transitions. [2023-11-17 11:19:29,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24358974358974358 [2023-11-17 11:19:29,584 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 19 transitions. [2023-11-17 11:19:29,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 19 transitions. [2023-11-17 11:19:29,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:29,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 19 transitions. [2023-11-17 11:19:29,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:29,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:29,591 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:29,592 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 2 states and 19 transitions. [2023-11-17 11:19:29,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 11:19:29,595 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 11:19:29,596 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 20 flow [2023-11-17 11:19:29,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, 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 11:19:29,601 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-11-17 11:19:29,601 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 20 flow [2023-11-17 11:19:29,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:29,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:29,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:19:29,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:19:29,603 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 11:19:29,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash 989252466, now seen corresponding path program 1 times [2023-11-17 11:19:29,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:29,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057889453] [2023-11-17 11:19:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:29,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:29,665 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:29,699 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:29,699 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:29,700 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:19:29,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:19:29,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:19:29,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:19:29,702 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:29,709 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:29,709 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:19:29,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:29,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 37 transitions, 84 flow [2023-11-17 11:19:29,730 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2023-11-17 11:19:29,730 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:19:29,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 42 events. 6/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 99 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-17 11:19:29,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 37 transitions, 84 flow [2023-11-17 11:19:29,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 37 transitions, 84 flow [2023-11-17 11:19:29,732 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:29,732 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 37 transitions, 84 flow [2023-11-17 11:19:29,732 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 37 transitions, 84 flow [2023-11-17 11:19:29,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 37 transitions, 84 flow [2023-11-17 11:19:29,737 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2023-11-17 11:19:29,738 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:19:29,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 42 events. 6/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 99 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-17 11:19:29,738 INFO L119 LiptonReduction]: Number of co-enabled transitions 720 [2023-11-17 11:19:30,249 INFO L134 LiptonReduction]: Checked pairs total: 1670 [2023-11-17 11:19:30,249 INFO L136 LiptonReduction]: Total number of compositions: 16 [2023-11-17 11:19:30,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:30,252 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;@37ddf3de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:30,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:19:30,254 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:30,254 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-11-17 11:19:30,254 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:30,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:30,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:19:30,255 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 11:19:30,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:30,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1678143499, now seen corresponding path program 1 times [2023-11-17 11:19:30,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:30,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513040964] [2023-11-17 11:19:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:30,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:30,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513040964] [2023-11-17 11:19:30,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513040964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:30,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:30,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:30,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583905627] [2023-11-17 11:19:30,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:30,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:30,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2023-11-17 11:19:30,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 68 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:30,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:30,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2023-11-17 11:19:30,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:30,364 INFO L124 PetriNetUnfolderBase]: 345/602 cut-off events. [2023-11-17 11:19:30,365 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-17 11:19:30,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 602 events. 345/602 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2305 event pairs, 294 based on Foata normal form. 51/551 useless extension candidates. Maximal degree in co-relation 747. Up to 564 conditions per place. [2023-11-17 11:19:30,369 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 21 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2023-11-17 11:19:30,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 100 flow [2023-11-17 11:19:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2023-11-17 11:19:30,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2023-11-17 11:19:30,370 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 44 transitions. [2023-11-17 11:19:30,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 44 transitions. [2023-11-17 11:19:30,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:30,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 44 transitions. [2023-11-17 11:19:30,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:30,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:30,371 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:30,371 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 68 flow. Second operand 2 states and 44 transitions. [2023-11-17 11:19:30,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 100 flow [2023-11-17 11:19:30,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:30,372 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 58 flow [2023-11-17 11:19:30,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-17 11:19:30,373 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-17 11:19:30,373 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 58 flow [2023-11-17 11:19:30,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:30,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:30,374 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:19:30,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:19:30,374 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 11:19:30,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:30,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1177207227, now seen corresponding path program 1 times [2023-11-17 11:19:30,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:30,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836601008] [2023-11-17 11:19:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:30,385 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:30,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:30,394 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:30,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:19:30,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:19:30,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:19:30,395 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:30,395 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:30,395 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:19:30,413 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:30,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 53 transitions, 124 flow [2023-11-17 11:19:30,418 INFO L124 PetriNetUnfolderBase]: 9/61 cut-off events. [2023-11-17 11:19:30,418 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:19:30,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 61 events. 9/61 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 165 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2023-11-17 11:19:30,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 53 transitions, 124 flow [2023-11-17 11:19:30,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 53 transitions, 124 flow [2023-11-17 11:19:30,420 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:30,420 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 53 transitions, 124 flow [2023-11-17 11:19:30,420 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 53 transitions, 124 flow [2023-11-17 11:19:30,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 53 transitions, 124 flow [2023-11-17 11:19:30,424 INFO L124 PetriNetUnfolderBase]: 9/61 cut-off events. [2023-11-17 11:19:30,424 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:19:30,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 61 events. 9/61 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 165 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2023-11-17 11:19:30,425 INFO L119 LiptonReduction]: Number of co-enabled transitions 1800 [2023-11-17 11:19:31,182 INFO L134 LiptonReduction]: Checked pairs total: 4242 [2023-11-17 11:19:31,182 INFO L136 LiptonReduction]: Total number of compositions: 24 [2023-11-17 11:19:31,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:31,184 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;@37ddf3de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:31,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:19:31,186 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:31,186 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 11:19:31,186 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:31,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:31,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:19:31,186 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 11:19:31,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash 363562078, now seen corresponding path program 1 times [2023-11-17 11:19:31,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:31,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648686569] [2023-11-17 11:19:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:31,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648686569] [2023-11-17 11:19:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648686569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:31,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:31,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:31,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936369286] [2023-11-17 11:19:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:31,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:31,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 77 [2023-11-17 11:19:31,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:31,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:31,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 77 [2023-11-17 11:19:31,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:31,629 INFO L124 PetriNetUnfolderBase]: 4505/6580 cut-off events. [2023-11-17 11:19:31,629 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2023-11-17 11:19:31,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13126 conditions, 6580 events. 4505/6580 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 31712 event pairs, 3878 based on Foata normal form. 627/5953 useless extension candidates. Maximal degree in co-relation 1782. Up to 6260 conditions per place. [2023-11-17 11:19:31,662 INFO L140 encePairwiseOnDemand]: 70/77 looper letters, 30 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2023-11-17 11:19:31,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 146 flow [2023-11-17 11:19:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 63 transitions. [2023-11-17 11:19:31,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2023-11-17 11:19:31,663 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 63 transitions. [2023-11-17 11:19:31,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 63 transitions. [2023-11-17 11:19:31,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:31,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 63 transitions. [2023-11-17 11:19:31,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:31,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:31,665 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:31,665 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 100 flow. Second operand 2 states and 63 transitions. [2023-11-17 11:19:31,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 146 flow [2023-11-17 11:19:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 144 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:31,667 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 84 flow [2023-11-17 11:19:31,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-17 11:19:31,667 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-11-17 11:19:31,667 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 84 flow [2023-11-17 11:19:31,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:31,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:31,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:31,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:19:31,668 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 11:19:31,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1030163172, now seen corresponding path program 1 times [2023-11-17 11:19:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:31,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467113247] [2023-11-17 11:19:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:31,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:31,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:31,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467113247] [2023-11-17 11:19:31,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467113247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:31,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:31,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859721942] [2023-11-17 11:19:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:31,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 77 [2023-11-17 11:19:31,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:31,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:31,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 77 [2023-11-17 11:19:31,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:32,275 INFO L124 PetriNetUnfolderBase]: 5068/7371 cut-off events. [2023-11-17 11:19:32,275 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2023-11-17 11:19:32,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14663 conditions, 7371 events. 5068/7371 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 36095 event pairs, 3878 based on Foata normal form. 0/6015 useless extension candidates. Maximal degree in co-relation 14657. Up to 6260 conditions per place. [2023-11-17 11:19:32,308 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 49 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-17 11:19:32,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 238 flow [2023-11-17 11:19:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-17 11:19:32,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2023-11-17 11:19:32,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-17 11:19:32,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-17 11:19:32,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:32,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-17 11:19:32,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,312 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 84 flow. Second operand 3 states and 91 transitions. [2023-11-17 11:19:32,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 238 flow [2023-11-17 11:19:32,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:32,314 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 96 flow [2023-11-17 11:19:32,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-17 11:19:32,314 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-11-17 11:19:32,314 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 96 flow [2023-11-17 11:19:32,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:32,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:32,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:19:32,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:32,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1786368265, now seen corresponding path program 1 times [2023-11-17 11:19:32,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:32,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042562765] [2023-11-17 11:19:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:32,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:19:32,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:32,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042562765] [2023-11-17 11:19:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042562765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:32,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:32,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113952638] [2023-11-17 11:19:32,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:32,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:32,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:32,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:32,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 77 [2023-11-17 11:19:32,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:32,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 77 [2023-11-17 11:19:32,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:32,804 INFO L124 PetriNetUnfolderBase]: 4505/6454 cut-off events. [2023-11-17 11:19:32,804 INFO L125 PetriNetUnfolderBase]: For 1340/1340 co-relation queries the response was YES. [2023-11-17 11:19:32,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14034 conditions, 6454 events. 4505/6454 cut-off events. For 1340/1340 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 30822 event pairs, 2342 based on Foata normal form. 0/5419 useless extension candidates. Maximal degree in co-relation 14026. Up to 3914 conditions per place. [2023-11-17 11:19:32,831 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 48 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-17 11:19:32,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 242 flow [2023-11-17 11:19:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-17 11:19:32,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2943722943722944 [2023-11-17 11:19:32,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-17 11:19:32,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-17 11:19:32,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:32,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-17 11:19:32,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,834 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 96 flow. Second operand 3 states and 68 transitions. [2023-11-17 11:19:32,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 242 flow [2023-11-17 11:19:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 238 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:19:32,836 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 92 flow [2023-11-17 11:19:32,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-17 11:19:32,836 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-11-17 11:19:32,837 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 92 flow [2023-11-17 11:19:32,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:32,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:32,837 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:19:32,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:19:32,837 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:32,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1101064143, now seen corresponding path program 1 times [2023-11-17 11:19:32,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:32,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888518467] [2023-11-17 11:19:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:32,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:32,846 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:32,854 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:32,854 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:32,855 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:19:32,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:19:32,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:19:32,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:19:32,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:19:32,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:19:32,855 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:19:32,856 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:32,856 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:19:32,877 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:32,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 69 transitions, 166 flow [2023-11-17 11:19:32,884 INFO L124 PetriNetUnfolderBase]: 12/80 cut-off events. [2023-11-17 11:19:32,884 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:32,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 80 events. 12/80 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 220 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 73. Up to 5 conditions per place. [2023-11-17 11:19:32,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 69 transitions, 166 flow [2023-11-17 11:19:32,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 69 transitions, 166 flow [2023-11-17 11:19:32,885 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:32,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 69 transitions, 166 flow [2023-11-17 11:19:32,885 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 69 transitions, 166 flow [2023-11-17 11:19:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 69 transitions, 166 flow [2023-11-17 11:19:32,890 INFO L124 PetriNetUnfolderBase]: 12/80 cut-off events. [2023-11-17 11:19:32,890 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:32,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 80 events. 12/80 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 220 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 73. Up to 5 conditions per place. [2023-11-17 11:19:32,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 3360 [2023-11-17 11:19:33,934 INFO L134 LiptonReduction]: Checked pairs total: 7912 [2023-11-17 11:19:33,935 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-11-17 11:19:33,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:33,936 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;@37ddf3de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:33,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:19:33,938 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:33,938 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-17 11:19:33,938 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:19:33,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:33,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:19:33,938 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 11:19:33,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1179682019, now seen corresponding path program 1 times [2023-11-17 11:19:33,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:33,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424971751] [2023-11-17 11:19:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:33,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:33,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424971751] [2023-11-17 11:19:33,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424971751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:33,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:33,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:19:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571760630] [2023-11-17 11:19:33,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:33,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 101 [2023-11-17 11:19:33,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 134 flow. Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:33,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:33,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 101 [2023-11-17 11:19:33,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:38,223 INFO L124 PetriNetUnfolderBase]: 50073/66695 cut-off events. [2023-11-17 11:19:38,223 INFO L125 PetriNetUnfolderBase]: For 6441/6441 co-relation queries the response was YES. [2023-11-17 11:19:38,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133658 conditions, 66695 events. 50073/66695 cut-off events. For 6441/6441 co-relation queries the response was YES. Maximal size of possible extension queue 1489. Compared 361647 event pairs, 43302 based on Foata normal form. 6771/59924 useless extension candidates. Maximal degree in co-relation 13194. Up to 64116 conditions per place. [2023-11-17 11:19:38,586 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 39 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-11-17 11:19:38,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 194 flow [2023-11-17 11:19:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 82 transitions. [2023-11-17 11:19:38,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40594059405940597 [2023-11-17 11:19:38,590 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 82 transitions. [2023-11-17 11:19:38,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 82 transitions. [2023-11-17 11:19:38,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:38,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 82 transitions. [2023-11-17 11:19:38,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:38,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:38,593 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:38,593 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 134 flow. Second operand 2 states and 82 transitions. [2023-11-17 11:19:38,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 194 flow [2023-11-17 11:19:38,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 188 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:38,602 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 110 flow [2023-11-17 11:19:38,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-17 11:19:38,603 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-17 11:19:38,604 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 110 flow [2023-11-17 11:19:38,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:38,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:38,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:38,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:19:38,604 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 11:19:38,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1809954459, now seen corresponding path program 1 times [2023-11-17 11:19:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:38,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570383628] [2023-11-17 11:19:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:38,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:38,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570383628] [2023-11-17 11:19:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570383628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:38,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:38,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614787328] [2023-11-17 11:19:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:38,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 101 [2023-11-17 11:19:38,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:38,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:38,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 101 [2023-11-17 11:19:38,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:42,970 INFO L124 PetriNetUnfolderBase]: 56332/74724 cut-off events. [2023-11-17 11:19:42,974 INFO L125 PetriNetUnfolderBase]: For 2943/2943 co-relation queries the response was YES. [2023-11-17 11:19:43,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148833 conditions, 74724 events. 56332/74724 cut-off events. For 2943/2943 co-relation queries the response was YES. Maximal size of possible extension queue 1587. Compared 408356 event pairs, 43302 based on Foata normal form. 0/59928 useless extension candidates. Maximal degree in co-relation 148826. Up to 64116 conditions per place. [2023-11-17 11:19:43,331 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 67 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-17 11:19:43,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 323 flow [2023-11-17 11:19:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2023-11-17 11:19:43,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39933993399339934 [2023-11-17 11:19:43,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2023-11-17 11:19:43,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2023-11-17 11:19:43,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:43,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2023-11-17 11:19:43,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:43,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:43,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:43,336 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 110 flow. Second operand 3 states and 121 transitions. [2023-11-17 11:19:43,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 323 flow [2023-11-17 11:19:43,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 323 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:43,346 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 122 flow [2023-11-17 11:19:43,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-11-17 11:19:43,347 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-17 11:19:43,347 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 122 flow [2023-11-17 11:19:43,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:43,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:43,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:43,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:19:43,352 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 11:19:43,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:43,352 INFO L85 PathProgramCache]: Analyzing trace with hash 358842985, now seen corresponding path program 1 times [2023-11-17 11:19:43,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:43,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817181687] [2023-11-17 11:19:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:43,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:43,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:43,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817181687] [2023-11-17 11:19:43,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817181687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:19:43,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544482390] [2023-11-17 11:19:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:43,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:19:43,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:19:43,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:19:43,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:19:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:43,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:19:43,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:19:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:43,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:19:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:19:43,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544482390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:19:43,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:19:43,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-17 11:19:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330135931] [2023-11-17 11:19:43,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:19:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:19:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:19:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:19:43,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 101 [2023-11-17 11:19:43,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:43,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:43,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 101 [2023-11-17 11:19:43,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:48,711 INFO L124 PetriNetUnfolderBase]: 62591/82747 cut-off events. [2023-11-17 11:19:48,712 INFO L125 PetriNetUnfolderBase]: For 10183/10183 co-relation queries the response was YES. [2023-11-17 11:19:48,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175621 conditions, 82747 events. 62591/82747 cut-off events. For 10183/10183 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 454908 event pairs, 43302 based on Foata normal form. 0/66697 useless extension candidates. Maximal degree in co-relation 175612. Up to 64116 conditions per place. [2023-11-17 11:19:49,185 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 96 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2023-11-17 11:19:49,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 104 transitions, 470 flow [2023-11-17 11:19:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:19:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:19:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2023-11-17 11:19:49,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158415841584158 [2023-11-17 11:19:49,188 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 168 transitions. [2023-11-17 11:19:49,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 168 transitions. [2023-11-17 11:19:49,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:49,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 168 transitions. [2023-11-17 11:19:49,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:49,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:49,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:49,190 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 122 flow. Second operand 4 states and 168 transitions. [2023-11-17 11:19:49,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 104 transitions, 470 flow [2023-11-17 11:19:49,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 104 transitions, 466 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:19:49,214 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 134 flow [2023-11-17 11:19:49,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-11-17 11:19:49,215 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2023-11-17 11:19:49,215 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 134 flow [2023-11-17 11:19:49,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:49,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:49,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:49,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:19:49,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 11:19:49,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:49,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1675939749, now seen corresponding path program 2 times [2023-11-17 11:19:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:49,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043924374] [2023-11-17 11:19:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:19:49,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:49,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043924374] [2023-11-17 11:19:49,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043924374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:49,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:49,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:49,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471430365] [2023-11-17 11:19:49,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:49,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:49,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:49,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 101 [2023-11-17 11:19:49,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:49,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:49,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 101 [2023-11-17 11:19:49,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:53,876 INFO L124 PetriNetUnfolderBase]: 56332/74055 cut-off events. [2023-11-17 11:19:53,876 INFO L125 PetriNetUnfolderBase]: For 23705/23705 co-relation queries the response was YES. [2023-11-17 11:19:54,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165717 conditions, 74055 events. 56332/74055 cut-off events. For 23705/23705 co-relation queries the response was YES. Maximal size of possible extension queue 1500. Compared 399514 event pairs, 32038 based on Foata normal form. 0/61014 useless extension candidates. Maximal degree in co-relation 165707. Up to 48088 conditions per place. [2023-11-17 11:19:54,237 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 67 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-11-17 11:19:54,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 341 flow [2023-11-17 11:19:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-17 11:19:54,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30363036303630364 [2023-11-17 11:19:54,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-17 11:19:54,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-17 11:19:54,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:54,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-17 11:19:54,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:54,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:54,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:54,239 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 134 flow. Second operand 3 states and 92 transitions. [2023-11-17 11:19:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 341 flow [2023-11-17 11:19:54,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 333 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 11:19:54,248 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 126 flow [2023-11-17 11:19:54,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-11-17 11:19:54,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-11-17 11:19:54,249 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 126 flow [2023-11-17 11:19:54,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:54,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:54,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:54,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:19:54,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:54,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1334939153, now seen corresponding path program 1 times [2023-11-17 11:19:54,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:54,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225705663] [2023-11-17 11:19:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:54,273 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 11:19:54,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:54,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225705663] [2023-11-17 11:19:54,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225705663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:54,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:54,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859468348] [2023-11-17 11:19:54,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:54,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:54,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:54,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:54,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 101 [2023-11-17 11:19:54,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:54,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:54,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 101 [2023-11-17 11:19:54,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:59,015 INFO L124 PetriNetUnfolderBase]: 63370/84108 cut-off events. [2023-11-17 11:19:59,016 INFO L125 PetriNetUnfolderBase]: For 16746/16746 co-relation queries the response was YES. [2023-11-17 11:19:59,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183264 conditions, 84108 events. 63370/84108 cut-off events. For 16746/16746 co-relation queries the response was YES. Maximal size of possible extension queue 1686. Compared 463825 event pairs, 48934 based on Foata normal form. 0/69930 useless extension candidates. Maximal degree in co-relation 183254. Up to 72130 conditions per place. [2023-11-17 11:19:59,446 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 68 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-17 11:19:59,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 352 flow [2023-11-17 11:19:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:19:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:19:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2023-11-17 11:19:59,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38943894389438943 [2023-11-17 11:19:59,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2023-11-17 11:19:59,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2023-11-17 11:19:59,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:59,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2023-11-17 11:19:59,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,448 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 126 flow. Second operand 3 states and 118 transitions. [2023-11-17 11:19:59,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 352 flow [2023-11-17 11:19:59,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:19:59,468 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 134 flow [2023-11-17 11:19:59,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-11-17 11:19:59,469 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-11-17 11:19:59,469 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 134 flow [2023-11-17 11:19:59,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:59,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:59,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:19:59,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:59,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1640324254, now seen corresponding path program 1 times [2023-11-17 11:19:59,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:59,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811951065] [2023-11-17 11:19:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:59,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:19:59,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:59,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811951065] [2023-11-17 11:19:59,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811951065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:59,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:59,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:19:59,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180727218] [2023-11-17 11:19:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:19:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:19:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:19:59,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 101 [2023-11-17 11:19:59,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:19:59,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:59,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 101 [2023-11-17 11:19:59,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:03,681 INFO L124 PetriNetUnfolderBase]: 56332/73884 cut-off events. [2023-11-17 11:20:03,682 INFO L125 PetriNetUnfolderBase]: For 21318/21318 co-relation queries the response was YES. [2023-11-17 11:20:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168382 conditions, 73884 events. 56332/73884 cut-off events. For 21318/21318 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 395168 event pairs, 29854 based on Foata normal form. 0/62814 useless extension candidates. Maximal degree in co-relation 168371. Up to 45103 conditions per place. [2023-11-17 11:20:04,061 INFO L140 encePairwiseOnDemand]: 98/101 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-17 11:20:04,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 348 flow [2023-11-17 11:20:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:20:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:20:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2023-11-17 11:20:04,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29372937293729373 [2023-11-17 11:20:04,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2023-11-17 11:20:04,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2023-11-17 11:20:04,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:04,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2023-11-17 11:20:04,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:04,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:04,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:04,063 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 134 flow. Second operand 3 states and 89 transitions. [2023-11-17 11:20:04,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 348 flow [2023-11-17 11:20:04,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 344 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:20:04,074 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 130 flow [2023-11-17 11:20:04,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-11-17 11:20:04,075 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-11-17 11:20:04,075 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 130 flow [2023-11-17 11:20:04,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:04,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:04,075 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:04,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 11:20:04,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:20:04,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1908486236, now seen corresponding path program 1 times [2023-11-17 11:20:04,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:04,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260969767] [2023-11-17 11:20:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:04,084 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:04,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:04,090 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:04,091 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:20:04,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:20:04,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:20:04,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:20:04,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:20:04,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:20:04,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 11:20:04,091 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-17 11:20:04,092 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:04,092 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:20:04,113 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:04,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 85 transitions, 210 flow [2023-11-17 11:20:04,119 INFO L124 PetriNetUnfolderBase]: 15/99 cut-off events. [2023-11-17 11:20:04,119 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:20:04,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 99 events. 15/99 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 294 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-11-17 11:20:04,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 85 transitions, 210 flow [2023-11-17 11:20:04,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 85 transitions, 210 flow [2023-11-17 11:20:04,120 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:04,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 85 transitions, 210 flow [2023-11-17 11:20:04,121 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 85 transitions, 210 flow [2023-11-17 11:20:04,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 85 transitions, 210 flow [2023-11-17 11:20:04,125 INFO L124 PetriNetUnfolderBase]: 15/99 cut-off events. [2023-11-17 11:20:04,126 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:20:04,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 99 events. 15/99 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 294 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-11-17 11:20:04,128 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2023-11-17 11:20:05,530 INFO L134 LiptonReduction]: Checked pairs total: 12182 [2023-11-17 11:20:05,530 INFO L136 LiptonReduction]: Total number of compositions: 40 [2023-11-17 11:20:05,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:05,532 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;@37ddf3de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:05,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:20:05,533 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:05,533 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-11-17 11:20:05,533 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:20:05,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:05,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:20:05,533 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 11:20:05,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2012951753, now seen corresponding path program 1 times [2023-11-17 11:20:05,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:05,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351561436] [2023-11-17 11:20:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:05,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:05,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351561436] [2023-11-17 11:20:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351561436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:05,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:05,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:20:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683710338] [2023-11-17 11:20:05,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:20:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:20:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:20:05,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 125 [2023-11-17 11:20:05,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 170 flow. Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:05,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:05,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 125 [2023-11-17 11:20:05,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand