/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/25_stack.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:07:39,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:07:39,187 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:07:39,220 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:07:39,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:07:39,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:07:39,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:07:39,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:07:39,223 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:07:39,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:07:39,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:07:39,228 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:07:39,228 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:07:39,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:07:39,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:07:39,230 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:07:39,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:07:39,230 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:07:39,230 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:07:39,231 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:07:39,231 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:07:39,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:07:39,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:07:39,232 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:07:39,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:07:39,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:07:39,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:07:39,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:07:39,233 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:07:39,233 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:07:39,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:07:39,235 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:07:39,235 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:07:39,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:07:39,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:07:39,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:07:39,458 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:07:39,458 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:07:39,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack.i [2023-11-17 15:07:40,670 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:07:40,899 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:07:40,901 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack.i [2023-11-17 15:07:40,915 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644251c95/eb8ab5beee9b408e897c6da0c78d0444/FLAG94e716b0e [2023-11-17 15:07:40,926 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644251c95/eb8ab5beee9b408e897c6da0c78d0444 [2023-11-17 15:07:40,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:07:40,929 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:07:40,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:07:40,930 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:07:40,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:07:40,936 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:07:40" (1/1) ... [2023-11-17 15:07:40,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e2a93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:40, skipping insertion in model container [2023-11-17 15:07:40,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:07:40" (1/1) ... [2023-11-17 15:07:40,972 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:07:41,258 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/25_stack.i[31168,31181] [2023-11-17 15:07:41,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:07:41,283 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:07:41,338 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/25_stack.i[31168,31181] [2023-11-17 15:07:41,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:07:41,378 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:07:41,378 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:07:41,385 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:07:41,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41 WrapperNode [2023-11-17 15:07:41,386 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:07:41,387 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:07:41,387 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:07:41,387 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:07:41,393 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,457 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2023-11-17 15:07:41,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:07:41,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:07:41,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:07:41,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:07:41,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,486 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:07:41,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:07:41,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:07:41,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:07:41,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (1/1) ... [2023-11-17 15:07:41,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:07:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:07:41,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:07:41,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:07:41,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:07:41,587 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:07:41,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:07:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:07:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:07:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:07:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:07:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:07:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:07:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:07:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:07:41,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:07:41,590 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:07:41,700 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:07:41,702 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:07:42,018 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:07:42,164 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:07:42,164 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:07:42,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:07:42 BoogieIcfgContainer [2023-11-17 15:07:42,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:07:42,168 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:07:42,168 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:07:42,171 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:07:42,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:07:40" (1/3) ... [2023-11-17 15:07:42,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22026ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:07:42, skipping insertion in model container [2023-11-17 15:07:42,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:41" (2/3) ... [2023-11-17 15:07:42,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22026ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:07:42, skipping insertion in model container [2023-11-17 15:07:42,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:07:42" (3/3) ... [2023-11-17 15:07:42,173 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack.i [2023-11-17 15:07:42,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:07:42,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:07:42,189 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:07:42,241 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:42,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 100 transitions, 204 flow [2023-11-17 15:07:42,331 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-17 15:07:42,331 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:07:42,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 111 events. 9/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-11-17 15:07:42,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 100 transitions, 204 flow [2023-11-17 15:07:42,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 100 transitions, 204 flow [2023-11-17 15:07:42,348 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:42,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 100 transitions, 204 flow [2023-11-17 15:07:42,363 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 100 transitions, 204 flow [2023-11-17 15:07:42,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 100 transitions, 204 flow [2023-11-17 15:07:42,386 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-17 15:07:42,386 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:07:42,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 111 events. 9/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-11-17 15:07:42,389 INFO L119 LiptonReduction]: Number of co-enabled transitions 1848 [2023-11-17 15:07:45,878 INFO L134 LiptonReduction]: Checked pairs total: 1967 [2023-11-17 15:07:45,878 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-11-17 15:07:45,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:45,908 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;@203be72c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:45,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:07:45,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:45,914 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 15:07:45,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:07:45,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:45,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:07:45,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:07:45,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash 281733516, now seen corresponding path program 1 times [2023-11-17 15:07:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:45,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127616360] [2023-11-17 15:07:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:46,044 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:46,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:46,079 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:46,080 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:07:46,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:07:46,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:07:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:07:46,083 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:07:46,086 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:46,087 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:07:46,125 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:46,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 344 flow [2023-11-17 15:07:46,209 INFO L124 PetriNetUnfolderBase]: 17/191 cut-off events. [2023-11-17 15:07:46,209 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:07:46,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 191 events. 17/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 355 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-11-17 15:07:46,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 167 transitions, 344 flow [2023-11-17 15:07:46,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 167 transitions, 344 flow [2023-11-17 15:07:46,218 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:46,218 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 167 transitions, 344 flow [2023-11-17 15:07:46,218 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 167 transitions, 344 flow [2023-11-17 15:07:46,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 344 flow [2023-11-17 15:07:46,267 INFO L124 PetriNetUnfolderBase]: 17/191 cut-off events. [2023-11-17 15:07:46,267 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:07:46,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 191 events. 17/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 355 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-11-17 15:07:46,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 12540 [2023-11-17 15:07:50,833 INFO L134 LiptonReduction]: Checked pairs total: 25496 [2023-11-17 15:07:50,834 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-11-17 15:07:50,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:50,837 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;@203be72c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:50,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:07:50,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:50,843 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-11-17 15:07:50,844 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:07:50,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:50,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:07:50,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:07:50,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:50,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1752292113, now seen corresponding path program 1 times [2023-11-17 15:07:50,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:50,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726356195] [2023-11-17 15:07:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:50,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:50,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:50,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:50,920 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:50,920 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:07:50,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:07:50,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:07:50,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:07:50,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:07:50,921 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:07:50,921 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:50,921 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:07:50,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:50,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 234 transitions, 486 flow [2023-11-17 15:07:51,027 INFO L124 PetriNetUnfolderBase]: 25/271 cut-off events. [2023-11-17 15:07:51,027 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:07:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 271 events. 25/271 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 707 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2023-11-17 15:07:51,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 234 transitions, 486 flow [2023-11-17 15:07:51,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 234 transitions, 486 flow [2023-11-17 15:07:51,036 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:51,036 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 234 transitions, 486 flow [2023-11-17 15:07:51,036 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 234 transitions, 486 flow [2023-11-17 15:07:51,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 234 transitions, 486 flow [2023-11-17 15:07:51,078 INFO L124 PetriNetUnfolderBase]: 25/271 cut-off events. [2023-11-17 15:07:51,078 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:07:51,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 271 events. 25/271 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 707 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2023-11-17 15:07:51,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 32076 [2023-11-17 15:07:56,820 INFO L134 LiptonReduction]: Checked pairs total: 64508 [2023-11-17 15:07:56,820 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-11-17 15:07:56,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:56,823 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;@203be72c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:56,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:07:56,828 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:56,828 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2023-11-17 15:07:56,828 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:07:56,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:56,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:56,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:56,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:56,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1791132552, now seen corresponding path program 1 times [2023-11-17 15:07:56,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:56,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969246609] [2023-11-17 15:07:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:56,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:56,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969246609] [2023-11-17 15:07:56,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969246609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:56,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:56,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:56,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478832995] [2023-11-17 15:07:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:56,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:07:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:07:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:07:57,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 434 [2023-11-17 15:07:57,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:57,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:57,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 434 [2023-11-17 15:07:57,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:00,645 INFO L124 PetriNetUnfolderBase]: 24686/37042 cut-off events. [2023-11-17 15:08:00,646 INFO L125 PetriNetUnfolderBase]: For 1486/1486 co-relation queries the response was YES. [2023-11-17 15:08:00,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70923 conditions, 37042 events. 24686/37042 cut-off events. For 1486/1486 co-relation queries the response was YES. Maximal size of possible extension queue 1688. Compared 274770 event pairs, 5686 based on Foata normal form. 120/29157 useless extension candidates. Maximal degree in co-relation 41614. Up to 22494 conditions per place. [2023-11-17 15:08:00,959 INFO L140 encePairwiseOnDemand]: 419/434 looper letters, 152 selfloop transitions, 13 changer transitions 0/184 dead transitions. [2023-11-17 15:08:00,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 184 transitions, 747 flow [2023-11-17 15:08:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:08:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:08:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1073 transitions. [2023-11-17 15:08:00,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944700460829493 [2023-11-17 15:08:00,979 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1073 transitions. [2023-11-17 15:08:00,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1073 transitions. [2023-11-17 15:08:00,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:00,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1073 transitions. [2023-11-17 15:08:00,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:01,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 434.0) internal successors, (2604), 6 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:01,001 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 434.0) internal successors, (2604), 6 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:01,003 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 180 flow. Second operand 5 states and 1073 transitions. [2023-11-17 15:08:01,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 184 transitions, 747 flow [2023-11-17 15:08:01,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 184 transitions, 739 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-17 15:08:01,015 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 282 flow [2023-11-17 15:08:01,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2023-11-17 15:08:01,020 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2023-11-17 15:08:01,021 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 282 flow [2023-11-17 15:08:01,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:01,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:01,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:01,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:08:01,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:01,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1569507154, now seen corresponding path program 1 times [2023-11-17 15:08:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:01,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728506699] [2023-11-17 15:08:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:01,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:01,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:01,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728506699] [2023-11-17 15:08:01,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728506699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:01,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:01,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:01,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30499877] [2023-11-17 15:08:01,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:01,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:01,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:01,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:01,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:01,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 434 [2023-11-17 15:08:01,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:01,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:01,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 434 [2023-11-17 15:08:01,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:05,193 INFO L124 PetriNetUnfolderBase]: 34842/51346 cut-off events. [2023-11-17 15:08:05,193 INFO L125 PetriNetUnfolderBase]: For 21344/22145 co-relation queries the response was YES. [2023-11-17 15:08:05,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112793 conditions, 51346 events. 34842/51346 cut-off events. For 21344/22145 co-relation queries the response was YES. Maximal size of possible extension queue 2696. Compared 393652 event pairs, 6822 based on Foata normal form. 1180/42358 useless extension candidates. Maximal degree in co-relation 49751. Up to 38389 conditions per place. [2023-11-17 15:08:05,581 INFO L140 encePairwiseOnDemand]: 427/434 looper letters, 94 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2023-11-17 15:08:05,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 608 flow [2023-11-17 15:08:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:08:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:08:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-11-17 15:08:05,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48310291858678955 [2023-11-17 15:08:05,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-11-17 15:08:05,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-11-17 15:08:05,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:05,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-11-17 15:08:05,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:05,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:05,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:05,592 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 282 flow. Second operand 3 states and 629 transitions. [2023-11-17 15:08:05,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 608 flow [2023-11-17 15:08:05,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 125 transitions, 608 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:08:05,608 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 312 flow [2023-11-17 15:08:05,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2023-11-17 15:08:05,610 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 10 predicate places. [2023-11-17 15:08:05,610 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 312 flow [2023-11-17 15:08:05,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:05,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:05,610 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:08:05,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:08:05,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:05,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1434362378, now seen corresponding path program 1 times [2023-11-17 15:08:05,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:05,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632584695] [2023-11-17 15:08:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:05,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:05,646 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:05,674 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:05,674 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:05,675 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:08:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:08:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:08:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:08:05,675 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:08:05,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:08:05,676 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:08:05,676 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:05,676 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:08:05,732 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:05,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:05,792 INFO L124 PetriNetUnfolderBase]: 33/351 cut-off events. [2023-11-17 15:08:05,793 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:08:05,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 351 events. 33/351 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1102 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 279. Up to 10 conditions per place. [2023-11-17 15:08:05,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:05,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:05,803 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:05,803 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:05,803 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:05,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:05,855 INFO L124 PetriNetUnfolderBase]: 33/351 cut-off events. [2023-11-17 15:08:05,856 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:08:05,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 351 events. 33/351 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1102 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 279. Up to 10 conditions per place. [2023-11-17 15:08:05,879 INFO L119 LiptonReduction]: Number of co-enabled transitions 60456 [2023-11-17 15:08:13,546 INFO L134 LiptonReduction]: Checked pairs total: 116830 [2023-11-17 15:08:13,546 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-11-17 15:08:13,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:13,555 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;@203be72c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:13,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:08:13,578 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:13,579 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2023-11-17 15:08:13,582 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:08:13,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:13,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:13,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:08:13,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1478547333, now seen corresponding path program 1 times [2023-11-17 15:08:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:13,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345479402] [2023-11-17 15:08:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:13,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:13,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345479402] [2023-11-17 15:08:13,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345479402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:13,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:13,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:08:13,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412409340] [2023-11-17 15:08:13,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:13,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:08:13,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:08:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:08:13,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 558 [2023-11-17 15:08:13,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 231.75) internal successors, (927), 4 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:13,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:13,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 558 [2023-11-17 15:08:13,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand