/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/35_double_lock_p3_vs-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:21:49,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:21:49,541 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 11:21:49,566 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:21:49,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:21:49,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:21:49,568 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:21:49,568 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:21:49,569 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:21:49,570 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:21:49,570 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:21:49,571 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:21:49,571 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:21:49,571 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:21:49,571 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:21:49,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:21:49,572 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:21:49,572 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:21:49,572 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:21:49,572 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:21:49,572 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:21:49,573 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:21:49,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:21:49,573 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:21:49,574 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:21:49,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:21:49,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:21:49,575 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:21:49,575 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:21:49,575 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:21:49,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:21:49,576 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:21:49,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:21:49,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:21:49,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:21:49,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:21:49,809 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:21:49,809 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:21:49,810 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i [2023-11-17 11:21:50,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:21:51,178 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:21:51,183 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i [2023-11-17 11:21:51,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7537aa1fa/2df0e2d679e54bfe82d889d14ea92302/FLAG9499d64ba [2023-11-17 11:21:51,212 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7537aa1fa/2df0e2d679e54bfe82d889d14ea92302 [2023-11-17 11:21:51,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:21:51,216 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:21:51,218 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:21:51,218 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:21:51,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:21:51,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,228 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a26fb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51, skipping insertion in model container [2023-11-17 11:21:51,228 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,269 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:21:51,527 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/35_double_lock_p3_vs-pthread.i[30711,30724] [2023-11-17 11:21:51,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:21:51,556 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:21:51,593 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/35_double_lock_p3_vs-pthread.i[30711,30724] [2023-11-17 11:21:51,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:21:51,636 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:21:51,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51 WrapperNode [2023-11-17 11:21:51,636 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:21:51,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:21:51,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:21:51,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:21:51,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,658 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,672 INFO L138 Inliner]: procedures = 165, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-17 11:21:51,673 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:21:51,673 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:21:51,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:21:51,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:21:51,679 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,683 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,686 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,688 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:21:51,691 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:21:51,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:21:51,692 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:21:51,692 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (1/1) ... [2023-11-17 11:21:51,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:21:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:21:51,715 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 11:21:51,736 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 11:21:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-17 11:21:51,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-17 11:21:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:21:51,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:21:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:21:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:21:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:21:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:21:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:21:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:21:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:21:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:21:51,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:21:51,743 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 11:21:51,864 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:21:51,865 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:21:52,020 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:21:52,130 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:21:52,130 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:21:52,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:21:52 BoogieIcfgContainer [2023-11-17 11:21:52,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:21:52,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:21:52,134 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:21:52,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:21:52,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:21:51" (1/3) ... [2023-11-17 11:21:52,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170d24e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:21:52, skipping insertion in model container [2023-11-17 11:21:52,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:51" (2/3) ... [2023-11-17 11:21:52,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170d24e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:21:52, skipping insertion in model container [2023-11-17 11:21:52,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:21:52" (3/3) ... [2023-11-17 11:21:52,139 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs-pthread.i [2023-11-17 11:21:52,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:21:52,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:21:52,162 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:21:52,230 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:52,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 32 transitions, 72 flow [2023-11-17 11:21:52,273 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-11-17 11:21:52,273 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:52,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 3/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 67 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-17 11:21:52,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 32 transitions, 72 flow [2023-11-17 11:21:52,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 69 flow [2023-11-17 11:21:52,281 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:52,289 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 31 transitions, 69 flow [2023-11-17 11:21:52,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 31 transitions, 69 flow [2023-11-17 11:21:52,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 69 flow [2023-11-17 11:21:52,298 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-11-17 11:21:52,299 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:52,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 3/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 67 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-17 11:21:52,300 INFO L119 LiptonReduction]: Number of co-enabled transitions 492 [2023-11-17 11:21:52,748 INFO L134 LiptonReduction]: Checked pairs total: 822 [2023-11-17 11:21:52,749 INFO L136 LiptonReduction]: Total number of compositions: 21 [2023-11-17 11:21:52,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:52,787 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;@4cdf594, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:52,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:21:52,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:52,790 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-11-17 11:21:52,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:52,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:52,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:21:52,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:21:52,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash 7602240, now seen corresponding path program 1 times [2023-11-17 11:21:52,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:52,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615861091] [2023-11-17 11:21:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:52,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:52,996 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 11:21:52,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:52,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615861091] [2023-11-17 11:21:52,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615861091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:52,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:52,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:21:52,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301433022] [2023-11-17 11:21:53,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:53,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:53,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 53 [2023-11-17 11:21:53,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 45 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 11:21:53,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:53,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 53 [2023-11-17 11:21:53,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:53,096 INFO L124 PetriNetUnfolderBase]: 84/142 cut-off events. [2023-11-17 11:21:53,096 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:21:53,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 142 events. 84/142 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 401 event pairs, 57 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 282. Up to 138 conditions per place. [2023-11-17 11:21:53,100 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-17 11:21:53,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 63 flow [2023-11-17 11:21:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2023-11-17 11:21:53,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2578616352201258 [2023-11-17 11:21:53,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 41 transitions. [2023-11-17 11:21:53,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 41 transitions. [2023-11-17 11:21:53,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:53,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 41 transitions. [2023-11-17 11:21:53,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 11:21:53,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 11:21:53,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 11:21:53,120 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 45 flow. Second operand 3 states and 41 transitions. [2023-11-17 11:21:53,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 63 flow [2023-11-17 11:21:53,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:21:53,124 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2023-11-17 11:21:53,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-11-17 11:21:53,129 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -2 predicate places. [2023-11-17 11:21:53,130 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2023-11-17 11:21:53,130 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 11:21:53,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:53,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:53,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:21:53,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:21:53,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1825786478, now seen corresponding path program 1 times [2023-11-17 11:21:53,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:53,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831326459] [2023-11-17 11:21:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:53,158 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:53,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:53,179 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:53,181 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:21:53,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:21:53,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 11:21:53,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:21:53,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:21:53,183 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:21:53,184 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:53,184 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:21:53,203 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:53,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 134 flow [2023-11-17 11:21:53,219 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-11-17 11:21:53,219 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:53,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 49 events. 4/49 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 107 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 56. Up to 3 conditions per place. [2023-11-17 11:21:53,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 134 flow [2023-11-17 11:21:53,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 44 transitions, 101 flow [2023-11-17 11:21:53,221 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:53,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 48 places, 44 transitions, 101 flow [2023-11-17 11:21:53,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 48 places, 44 transitions, 101 flow [2023-11-17 11:21:53,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 44 transitions, 101 flow [2023-11-17 11:21:53,228 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-11-17 11:21:53,228 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:53,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 49 events. 4/49 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 107 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 52. Up to 3 conditions per place. [2023-11-17 11:21:53,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 1186 [2023-11-17 11:21:53,806 INFO L134 LiptonReduction]: Checked pairs total: 2350 [2023-11-17 11:21:53,806 INFO L136 LiptonReduction]: Total number of compositions: 29 [2023-11-17 11:21:53,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:53,809 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;@4cdf594, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:53,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:21:53,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:53,811 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2023-11-17 11:21:53,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:53,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:53,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:21:53,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:21:53,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash 10026861, now seen corresponding path program 1 times [2023-11-17 11:21:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:53,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164463041] [2023-11-17 11:21:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:53,847 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 11:21:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164463041] [2023-11-17 11:21:53,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164463041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:53,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:53,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:21:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131664678] [2023-11-17 11:21:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:53,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:53,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 86 [2023-11-17 11:21:53,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 11:21:53,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:53,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 86 [2023-11-17 11:21:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:53,925 INFO L124 PetriNetUnfolderBase]: 699/991 cut-off events. [2023-11-17 11:21:53,925 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-17 11:21:53,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 991 events. 699/991 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3586 event pairs, 507 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 2016. Up to 978 conditions per place. [2023-11-17 11:21:53,931 INFO L140 encePairwiseOnDemand]: 81/86 looper letters, 18 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-17 11:21:53,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 21 transitions, 93 flow [2023-11-17 11:21:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-17 11:21:53,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25193798449612403 [2023-11-17 11:21:53,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-17 11:21:53,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-17 11:21:53,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:53,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-17 11:21:53,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 11:21:53,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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 11:21:53,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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 11:21:53,934 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 63 flow. Second operand 3 states and 65 transitions. [2023-11-17 11:21:53,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 21 transitions, 93 flow [2023-11-17 11:21:53,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:21:53,935 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 56 flow [2023-11-17 11:21:53,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-17 11:21:53,936 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-17 11:21:53,936 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 56 flow [2023-11-17 11:21:53,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 11:21:53,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:53,937 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:53,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:21:53,937 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:21:53,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash 251086334, now seen corresponding path program 1 times [2023-11-17 11:21:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:53,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157174263] [2023-11-17 11:21:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:53,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:53,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:53,963 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:53,964 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:53,964 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:21:53,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:21:53,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-17 11:21:53,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:21:53,964 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:21:53,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:21:53,965 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:21:53,965 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:53,965 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:21:53,991 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:53,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 82 transitions, 200 flow [2023-11-17 11:21:53,998 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2023-11-17 11:21:53,998 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:21:53,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 65 events. 5/65 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 173 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-11-17 11:21:53,999 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 82 transitions, 200 flow [2023-11-17 11:21:53,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 57 transitions, 135 flow [2023-11-17 11:21:53,999 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:53,999 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 57 transitions, 135 flow [2023-11-17 11:21:54,000 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 57 transitions, 135 flow [2023-11-17 11:21:54,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 57 transitions, 135 flow [2023-11-17 11:21:54,003 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2023-11-17 11:21:54,003 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:21:54,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 65 events. 5/65 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 173 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-11-17 11:21:54,005 INFO L119 LiptonReduction]: Number of co-enabled transitions 2192 [2023-11-17 11:21:54,754 INFO L134 LiptonReduction]: Checked pairs total: 3326 [2023-11-17 11:21:54,754 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-11-17 11:21:54,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:54,757 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;@4cdf594, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:54,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:21:54,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:54,758 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 11:21:54,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:54,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:54,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:21:54,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:21:54,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:54,759 INFO L85 PathProgramCache]: Analyzing trace with hash 13467696, now seen corresponding path program 1 times [2023-11-17 11:21:54,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:54,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854765621] [2023-11-17 11:21:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:54,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:54,780 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 11:21:54,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:54,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854765621] [2023-11-17 11:21:54,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854765621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:54,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:54,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:21:54,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251742949] [2023-11-17 11:21:54,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:54,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:54,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:54,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:54,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:54,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 119 [2023-11-17 11:21:54,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 11:21:54,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:54,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 119 [2023-11-17 11:21:54,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:55,207 INFO L124 PetriNetUnfolderBase]: 4899/6364 cut-off events. [2023-11-17 11:21:55,207 INFO L125 PetriNetUnfolderBase]: For 622/622 co-relation queries the response was YES. [2023-11-17 11:21:55,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13026 conditions, 6364 events. 4899/6364 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25751 event pairs, 3657 based on Foata normal form. 0/5589 useless extension candidates. Maximal degree in co-relation 13014. Up to 6303 conditions per place. [2023-11-17 11:21:55,239 INFO L140 encePairwiseOnDemand]: 115/119 looper letters, 24 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-17 11:21:55,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 27 transitions, 125 flow [2023-11-17 11:21:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-17 11:21:55,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24649859943977592 [2023-11-17 11:21:55,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-17 11:21:55,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-17 11:21:55,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:55,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-17 11:21:55,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 11:21:55,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 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 11:21:55,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 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 11:21:55,243 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 81 flow. Second operand 3 states and 88 transitions. [2023-11-17 11:21:55,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 27 transitions, 125 flow [2023-11-17 11:21:55,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 27 transitions, 122 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:21:55,246 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 74 flow [2023-11-17 11:21:55,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-17 11:21:55,247 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-17 11:21:55,247 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 74 flow [2023-11-17 11:21:55,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 11:21:55,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:55,247 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:55,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:21:55,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:21:55,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash -604344323, now seen corresponding path program 1 times [2023-11-17 11:21:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314402964] [2023-11-17 11:21:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:55,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:55,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:55,328 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:55,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:21:55,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:21:55,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-17 11:21:55,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:21:55,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:21:55,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:21:55,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:21:55,329 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:21:55,329 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:55,329 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:21:55,354 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 270 flow [2023-11-17 11:21:55,362 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2023-11-17 11:21:55,362 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:21:55,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 81 events. 6/81 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2023-11-17 11:21:55,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 107 transitions, 270 flow [2023-11-17 11:21:55,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 171 flow [2023-11-17 11:21:55,363 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:55,363 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 70 transitions, 171 flow [2023-11-17 11:21:55,363 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 70 transitions, 171 flow [2023-11-17 11:21:55,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 171 flow [2023-11-17 11:21:55,368 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2023-11-17 11:21:55,368 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:21:55,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 81 events. 6/81 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 93. Up to 5 conditions per place. [2023-11-17 11:21:55,370 INFO L119 LiptonReduction]: Number of co-enabled transitions 3510 [2023-11-17 11:21:56,310 INFO L134 LiptonReduction]: Checked pairs total: 5609 [2023-11-17 11:21:56,310 INFO L136 LiptonReduction]: Total number of compositions: 46 [2023-11-17 11:21:56,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:56,312 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;@4cdf594, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:56,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:21:56,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:56,318 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 11:21:56,318 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:56,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:56,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:21:56,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:21:56,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash 17924744, now seen corresponding path program 1 times [2023-11-17 11:21:56,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:56,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175736713] [2023-11-17 11:21:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:56,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:56,342 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 11:21:56,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175736713] [2023-11-17 11:21:56,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175736713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:56,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:56,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:21:56,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590262215] [2023-11-17 11:21:56,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:56,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:56,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 153 [2023-11-17 11:21:56,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 11:21:56,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:56,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 153 [2023-11-17 11:21:56,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:58,955 INFO L124 PetriNetUnfolderBase]: 31524/38854 cut-off events. [2023-11-17 11:21:58,956 INFO L125 PetriNetUnfolderBase]: For 5764/5764 co-relation queries the response was YES. [2023-11-17 11:21:59,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79642 conditions, 38854 events. 31524/38854 cut-off events. For 5764/5764 co-relation queries the response was YES. Maximal size of possible extension queue 1330. Compared 169173 event pairs, 23907 based on Foata normal form. 0/33580 useless extension candidates. Maximal degree in co-relation 79629. Up to 38553 conditions per place. [2023-11-17 11:21:59,272 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-17 11:21:59,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 159 flow [2023-11-17 11:21:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-17 11:21:59,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2440087145969499 [2023-11-17 11:21:59,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-17 11:21:59,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-17 11:21:59,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:59,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-17 11:21:59,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 11:21:59,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 11:21:59,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 11:21:59,276 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 103 flow. Second operand 3 states and 112 transitions. [2023-11-17 11:21:59,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 159 flow [2023-11-17 11:21:59,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 152 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 11:21:59,281 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 92 flow [2023-11-17 11:21:59,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-17 11:21:59,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-11-17 11:21:59,282 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 92 flow [2023-11-17 11:21:59,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 11:21:59,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:59,282 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:59,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:21:59,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:21:59,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:59,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2037047930, now seen corresponding path program 1 times [2023-11-17 11:21:59,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:59,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286943254] [2023-11-17 11:21:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:59,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:59,294 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:59,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:59,304 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:59,304 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:21:59,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:21:59,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-17 11:21:59,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:21:59,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:21:59,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:21:59,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:21:59,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:21:59,305 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:21:59,306 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:59,306 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:21:59,333 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:59,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 132 transitions, 344 flow [2023-11-17 11:21:59,342 INFO L124 PetriNetUnfolderBase]: 7/97 cut-off events. [2023-11-17 11:21:59,342 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:21:59,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 97 events. 7/97 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 295 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 119. Up to 6 conditions per place. [2023-11-17 11:21:59,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 132 transitions, 344 flow [2023-11-17 11:21:59,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 83 transitions, 209 flow [2023-11-17 11:21:59,344 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:59,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 83 transitions, 209 flow [2023-11-17 11:21:59,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 83 transitions, 209 flow [2023-11-17 11:21:59,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 83 transitions, 209 flow [2023-11-17 11:21:59,350 INFO L124 PetriNetUnfolderBase]: 7/97 cut-off events. [2023-11-17 11:21:59,350 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:21:59,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 97 events. 7/97 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 288 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2023-11-17 11:21:59,353 INFO L119 LiptonReduction]: Number of co-enabled transitions 5140 [2023-11-17 11:22:00,500 INFO L134 LiptonReduction]: Checked pairs total: 9948 [2023-11-17 11:22:00,500 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-11-17 11:22:00,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:00,502 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;@4cdf594, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:00,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 11:22:00,503 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:00,503 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-11-17 11:22:00,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:00,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:00,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:00,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-17 11:22:00,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash 23427426, now seen corresponding path program 1 times [2023-11-17 11:22:00,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:00,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962367476] [2023-11-17 11:22:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:00,526 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 11:22:00,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:00,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962367476] [2023-11-17 11:22:00,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962367476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:00,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:00,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:00,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470529842] [2023-11-17 11:22:00,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:00,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:00,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:00,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:00,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:00,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 189 [2023-11-17 11:22:00,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 11:22:00,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:00,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 189 [2023-11-17 11:22:00,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:15,368 INFO L124 PetriNetUnfolderBase]: 192774/229429 cut-off events. [2023-11-17 11:22:15,368 INFO L125 PetriNetUnfolderBase]: For 45577/45577 co-relation queries the response was YES. [2023-11-17 11:22:15,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470843 conditions, 229429 events. 192774/229429 cut-off events. For 45577/45577 co-relation queries the response was YES. Maximal size of possible extension queue 6215. Compared 1043159 event pairs, 147657 based on Foata normal form. 0/196029 useless extension candidates. Maximal degree in co-relation 470829. Up to 227928 conditions per place. [2023-11-17 11:22:16,602 INFO L140 encePairwiseOnDemand]: 184/189 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-17 11:22:16,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 195 flow [2023-11-17 11:22:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-17 11:22:16,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24162257495590828 [2023-11-17 11:22:16,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-17 11:22:16,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-17 11:22:16,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:16,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-17 11:22:16,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 11:22:16,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 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 11:22:16,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 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 11:22:16,607 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 129 flow. Second operand 3 states and 137 transitions. [2023-11-17 11:22:16,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 195 flow [2023-11-17 11:22:16,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 182 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:22:16,632 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 110 flow [2023-11-17 11:22:16,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-17 11:22:16,633 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-11-17 11:22:16,633 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 110 flow [2023-11-17 11:22:16,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 11:22:16,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:16,633 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:22:16,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-17 11:22:16,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1108086796, now seen corresponding path program 1 times [2023-11-17 11:22:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143518303] [2023-11-17 11:22:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:16,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:16,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:16,659 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:16,659 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-17 11:22:16,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-17 11:22:16,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-11-17 11:22:16,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-17 11:22:16,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-17 11:22:16,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-17 11:22:16,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-17 11:22:16,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-17 11:22:16,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:22:16,660 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:16,661 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:16,661 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 11:22:16,699 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:16,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 157 transitions, 422 flow [2023-11-17 11:22:16,714 INFO L124 PetriNetUnfolderBase]: 8/113 cut-off events. [2023-11-17 11:22:16,714 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:22:16,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 113 events. 8/113 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 339 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 142. Up to 7 conditions per place. [2023-11-17 11:22:16,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 157 transitions, 422 flow [2023-11-17 11:22:16,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 96 transitions, 249 flow [2023-11-17 11:22:16,716 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:16,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 96 transitions, 249 flow [2023-11-17 11:22:16,716 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 96 transitions, 249 flow [2023-11-17 11:22:16,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 96 transitions, 249 flow [2023-11-17 11:22:16,723 INFO L124 PetriNetUnfolderBase]: 8/113 cut-off events. [2023-11-17 11:22:16,723 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:22:16,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 113 events. 8/113 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 332 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 138. Up to 7 conditions per place. [2023-11-17 11:22:16,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 7082 [2023-11-17 11:22:18,129 INFO L134 LiptonReduction]: Checked pairs total: 13288 [2023-11-17 11:22:18,130 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-11-17 11:22:18,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:18,133 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;@4cdf594, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:18,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 11:22:18,134 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:18,134 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2023-11-17 11:22:18,134 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:18,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:18,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:18,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 11:22:18,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash 30037989, now seen corresponding path program 1 times [2023-11-17 11:22:18,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:18,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673386597] [2023-11-17 11:22:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:18,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:18,158 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 11:22:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673386597] [2023-11-17 11:22:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673386597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:18,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:18,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476850704] [2023-11-17 11:22:18,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:18,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:18,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 222 [2023-11-17 11:22:18,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 155 flow. Second operand 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 11:22:18,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:18,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 222 [2023-11-17 11:22:18,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand