/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_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:08:00,258 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:08:00,322 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 15:08:00,351 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:08:00,352 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:08:00,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:08:00,353 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:08:00,353 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:08:00,353 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:08:00,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:08:00,357 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:08:00,357 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:08:00,357 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:08:00,358 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:08:00,358 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:08:00,358 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:08:00,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:08:00,358 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:08:00,359 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:08:00,359 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:08:00,359 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:08:00,360 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:08:00,360 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:08:00,360 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:08:00,360 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:08:00,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:08:00,360 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:08:00,361 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:08:00,361 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:08:00,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:08:00,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:08:00,362 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:08:00,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:08:00,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:08:00,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:08:00,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:08:00,566 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:08:00,567 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:08:00,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-1.i [2023-11-17 15:08:01,538 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:08:01,710 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:08:01,711 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longer-1.i [2023-11-17 15:08:01,719 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2aacc627/a220a977b28540eea05a0a332db9a9f8/FLAG42f08a456 [2023-11-17 15:08:01,728 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2aacc627/a220a977b28540eea05a0a332db9a9f8 [2023-11-17 15:08:01,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:08:01,730 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:08:01,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:08:01,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:08:01,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:08:01,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:08:01" (1/1) ... [2023-11-17 15:08:01,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46db7e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:01, skipping insertion in model container [2023-11-17 15:08:01,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:08:01" (1/1) ... [2023-11-17 15:08:01,763 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:08:01,972 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_longer-1.i[31182,31195] [2023-11-17 15:08:01,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:08:01,991 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:08:02,029 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_longer-1.i[31182,31195] [2023-11-17 15:08:02,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:08:02,061 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:08:02,062 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:08:02,067 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:08:02,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02 WrapperNode [2023-11-17 15:08:02,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:08:02,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:08:02,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:08:02,068 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:08:02,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,101 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2023-11-17 15:08:02,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:08:02,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:08:02,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:08:02,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:08:02,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,118 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,119 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,120 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:08:02,123 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:08:02,123 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:08:02,123 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:08:02,124 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (1/1) ... [2023-11-17 15:08:02,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:08:02,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:08:02,155 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 15:08:02,168 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 15:08:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:08:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:08:02,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:08:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:08:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:08:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:08:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:08:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:08:02,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:08:02,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:08:02,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:08:02,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:08:02,184 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 15:08:02,273 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:08:02,275 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:08:02,497 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:08:02,651 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:08:02,651 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:08:02,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:08:02 BoogieIcfgContainer [2023-11-17 15:08:02,654 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:08:02,656 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:08:02,656 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:08:02,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:08:02,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:08:01" (1/3) ... [2023-11-17 15:08:02,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530e7601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:08:02, skipping insertion in model container [2023-11-17 15:08:02,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:02" (2/3) ... [2023-11-17 15:08:02,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530e7601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:08:02, skipping insertion in model container [2023-11-17 15:08:02,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:08:02" (3/3) ... [2023-11-17 15:08:02,661 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-1.i [2023-11-17 15:08:02,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:08:02,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:08:02,674 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:08:02,738 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:02,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 100 transitions, 204 flow [2023-11-17 15:08:02,799 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-17 15:08:02,800 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:02,804 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 15:08:02,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 100 transitions, 204 flow [2023-11-17 15:08:02,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 100 transitions, 204 flow [2023-11-17 15:08:02,809 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:02,817 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 100 transitions, 204 flow [2023-11-17 15:08:02,819 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 100 transitions, 204 flow [2023-11-17 15:08:02,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 100 transitions, 204 flow [2023-11-17 15:08:02,851 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-17 15:08:02,852 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:02,853 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 15:08:02,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 1848 [2023-11-17 15:08:05,602 INFO L134 LiptonReduction]: Checked pairs total: 1967 [2023-11-17 15:08:05,603 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-11-17 15:08:05,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:05,618 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;@736153c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:05,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:08:05,621 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:05,621 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 15:08:05,621 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:05,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:05,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:08:05,622 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 15:08:05,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:05,626 INFO L85 PathProgramCache]: Analyzing trace with hash 281733516, now seen corresponding path program 1 times [2023-11-17 15:08:05,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:05,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311200959] [2023-11-17 15:08:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:05,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:05,727 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:05,775 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:05,776 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:05,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:08:05,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:08:05,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:08:05,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:08:05,780 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:08:05,788 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:05,788 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:08:05,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:05,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 344 flow [2023-11-17 15:08:05,869 INFO L124 PetriNetUnfolderBase]: 17/191 cut-off events. [2023-11-17 15:08:05,869 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:05,873 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 15:08:05,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 167 transitions, 344 flow [2023-11-17 15:08:05,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 167 transitions, 344 flow [2023-11-17 15:08:05,875 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:05,875 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 167 transitions, 344 flow [2023-11-17 15:08:05,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 167 transitions, 344 flow [2023-11-17 15:08:05,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 344 flow [2023-11-17 15:08:05,900 INFO L124 PetriNetUnfolderBase]: 17/191 cut-off events. [2023-11-17 15:08:05,900 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:05,901 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 15:08:05,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 12540 [2023-11-17 15:08:09,572 INFO L134 LiptonReduction]: Checked pairs total: 25496 [2023-11-17 15:08:09,572 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-11-17 15:08:09,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:09,580 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;@736153c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:09,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:08:09,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:09,588 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-11-17 15:08:09,588 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:09,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:09,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:08:09,589 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 15:08:09,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1752292113, now seen corresponding path program 1 times [2023-11-17 15:08:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:09,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305831074] [2023-11-17 15:08:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:09,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:09,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:09,631 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:09,631 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:09,631 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:08:09,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:08:09,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:08:09,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:08:09,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:08:09,632 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:08:09,632 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:09,632 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:08:09,655 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:09,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 234 transitions, 486 flow [2023-11-17 15:08:09,683 INFO L124 PetriNetUnfolderBase]: 25/271 cut-off events. [2023-11-17 15:08:09,683 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:08:09,686 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 15:08:09,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 234 transitions, 486 flow [2023-11-17 15:08:09,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 234 transitions, 486 flow [2023-11-17 15:08:09,688 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:09,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 234 transitions, 486 flow [2023-11-17 15:08:09,688 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 234 transitions, 486 flow [2023-11-17 15:08:09,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 234 transitions, 486 flow [2023-11-17 15:08:09,710 INFO L124 PetriNetUnfolderBase]: 25/271 cut-off events. [2023-11-17 15:08:09,710 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:08:09,713 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 15:08:09,723 INFO L119 LiptonReduction]: Number of co-enabled transitions 32076 [2023-11-17 15:08:14,843 INFO L134 LiptonReduction]: Checked pairs total: 64508 [2023-11-17 15:08:14,843 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-11-17 15:08:14,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:14,853 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;@736153c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:14,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:08:14,860 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:14,860 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2023-11-17 15:08:14,861 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:08:14,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:14,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:14,862 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 15:08:14,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1791132552, now seen corresponding path program 1 times [2023-11-17 15:08:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853485220] [2023-11-17 15:08:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:15,017 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 15:08:15,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853485220] [2023-11-17 15:08:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853485220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:15,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:15,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:08:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744622954] [2023-11-17 15:08:15,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:08:15,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:08:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:08:15,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 434 [2023-11-17 15:08:15,042 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 15:08:15,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:15,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 434 [2023-11-17 15:08:15,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:17,842 INFO L124 PetriNetUnfolderBase]: 24686/37042 cut-off events. [2023-11-17 15:08:17,842 INFO L125 PetriNetUnfolderBase]: For 1486/1486 co-relation queries the response was YES. [2023-11-17 15:08:17,909 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 15:08:18,074 INFO L140 encePairwiseOnDemand]: 419/434 looper letters, 152 selfloop transitions, 13 changer transitions 0/184 dead transitions. [2023-11-17 15:08:18,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 184 transitions, 747 flow [2023-11-17 15:08:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:08:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:08:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1073 transitions. [2023-11-17 15:08:18,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944700460829493 [2023-11-17 15:08:18,092 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1073 transitions. [2023-11-17 15:08:18,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1073 transitions. [2023-11-17 15:08:18,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:18,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1073 transitions. [2023-11-17 15:08:18,102 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 15:08:18,109 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 15:08:18,110 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 15:08:18,111 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 180 flow. Second operand 5 states and 1073 transitions. [2023-11-17 15:08:18,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 184 transitions, 747 flow [2023-11-17 15:08:18,116 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 15:08:18,119 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 282 flow [2023-11-17 15:08:18,121 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 15:08:18,123 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2023-11-17 15:08:18,123 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 282 flow [2023-11-17 15:08:18,124 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 15:08:18,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:18,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:08:18,124 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 15:08:18,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1569507154, now seen corresponding path program 1 times [2023-11-17 15:08:18,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:18,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903473045] [2023-11-17 15:08:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:18,221 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 15:08:18,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:18,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903473045] [2023-11-17 15:08:18,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903473045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:18,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:18,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:18,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308587848] [2023-11-17 15:08:18,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:18,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:18,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:18,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 434 [2023-11-17 15:08:18,224 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 15:08:18,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:18,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 434 [2023-11-17 15:08:18,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:21,844 INFO L124 PetriNetUnfolderBase]: 34842/51346 cut-off events. [2023-11-17 15:08:21,844 INFO L125 PetriNetUnfolderBase]: For 21344/22145 co-relation queries the response was YES. [2023-11-17 15:08:21,979 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 15:08:22,313 INFO L140 encePairwiseOnDemand]: 427/434 looper letters, 94 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2023-11-17 15:08:22,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 608 flow [2023-11-17 15:08:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:08:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:08:22,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-11-17 15:08:22,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48310291858678955 [2023-11-17 15:08:22,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-11-17 15:08:22,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-11-17 15:08:22,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:22,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-11-17 15:08:22,318 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 15:08:22,320 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 15:08:22,321 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 15:08:22,321 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 282 flow. Second operand 3 states and 629 transitions. [2023-11-17 15:08:22,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 608 flow [2023-11-17 15:08:22,331 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 15:08:22,333 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 312 flow [2023-11-17 15:08:22,333 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 15:08:22,334 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 10 predicate places. [2023-11-17 15:08:22,334 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 312 flow [2023-11-17 15:08:22,334 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 15:08:22,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:22,335 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:08:22,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:08:22,335 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 15:08:22,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:22,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1434362378, now seen corresponding path program 1 times [2023-11-17 15:08:22,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:22,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358461718] [2023-11-17 15:08:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:22,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:22,369 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:22,371 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:22,371 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:08:22,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:08:22,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:08:22,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:08:22,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:08:22,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:08:22,372 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:08:22,372 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:22,372 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:08:22,407 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:22,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:22,451 INFO L124 PetriNetUnfolderBase]: 33/351 cut-off events. [2023-11-17 15:08:22,451 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:08:22,456 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 15:08:22,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:22,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:22,463 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:22,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:22,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:22,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 301 transitions, 630 flow [2023-11-17 15:08:22,502 INFO L124 PetriNetUnfolderBase]: 33/351 cut-off events. [2023-11-17 15:08:22,502 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:08:22,506 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 15:08:22,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 60456 [2023-11-17 15:08:28,805 INFO L134 LiptonReduction]: Checked pairs total: 116830 [2023-11-17 15:08:28,805 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-11-17 15:08:28,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:28,808 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;@736153c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:28,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:08:28,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:28,812 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2023-11-17 15:08:28,812 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:08:28,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:28,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:28,817 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 15:08:28,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1478547333, now seen corresponding path program 1 times [2023-11-17 15:08:28,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:28,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491736219] [2023-11-17 15:08:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:28,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:28,863 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 15:08:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491736219] [2023-11-17 15:08:28,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491736219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:28,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:28,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:08:28,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947751005] [2023-11-17 15:08:28,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:28,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:08:28,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:08:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:08:28,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 558 [2023-11-17 15:08:28,865 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 15:08:28,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:28,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 558 [2023-11-17 15:08:28,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand