/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:20:05,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:20:05,801 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:20:05,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:20:05,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:20:05,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:20:05,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:20:05,831 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:20:05,832 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:20:05,835 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:20:05,835 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:20:05,835 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:20:05,836 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:20:05,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:20:05,837 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:20:05,837 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:20:05,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:20:05,837 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:20:05,837 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:20:05,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:20:05,838 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:20:05,838 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:20:05,839 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:20:05,839 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:20:05,839 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:20:05,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:20:05,839 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:20:05,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:20:05,840 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:20:05,840 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:20:05,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:20:05,841 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:20:05,841 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:20:06,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:20:06,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:20:06,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:20:06,059 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:20:06,059 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:20:06,060 INFO L431 ainManager$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 11:20:07,006 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:20:07,219 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:20:07,224 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longer-1.i [2023-11-17 11:20:07,240 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa4735d2/98714b90faa84887b660cc7e75c19234/FLAGcf889da64 [2023-11-17 11:20:07,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa4735d2/98714b90faa84887b660cc7e75c19234 [2023-11-17 11:20:07,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:20:07,259 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:20:07,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:20:07,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:20:07,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:20:07,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d86eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07, skipping insertion in model container [2023-11-17 11:20:07,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,307 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:20:07,580 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 11:20:07,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:20:07,601 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:20:07,637 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 11:20:07,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:20:07,664 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:20:07,664 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:20:07,669 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:20:07,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07 WrapperNode [2023-11-17 11:20:07,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:20:07,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:20:07,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:20:07,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:20:07,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,722 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2023-11-17 11:20:07,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:20:07,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:20:07,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:20:07,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:20:07,728 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,735 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:20:07,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:20:07,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:20:07,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:20:07,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (1/1) ... [2023-11-17 11:20:07,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:20:07,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:20:07,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:20:07,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:20:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:20:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:20:07,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:20:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:20:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:20:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:20:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:20:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:20:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:20:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:20:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:20:07,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:20:07,807 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:20:07,902 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:20:07,903 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:20:08,097 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:20:08,317 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:20:08,317 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:20:08,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:20:08 BoogieIcfgContainer [2023-11-17 11:20:08,319 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:20:08,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:20:08,321 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:20:08,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:20:08,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:20:07" (1/3) ... [2023-11-17 11:20:08,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c237d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:20:08, skipping insertion in model container [2023-11-17 11:20:08,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:07" (2/3) ... [2023-11-17 11:20:08,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c237d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:20:08, skipping insertion in model container [2023-11-17 11:20:08,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:20:08" (3/3) ... [2023-11-17 11:20:08,325 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-1.i [2023-11-17 11:20:08,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:20:08,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:20:08,337 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:20:08,381 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:08,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:08,435 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-11-17 11:20:08,435 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:08,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 5/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:20:08,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:08,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:08,445 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:08,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:08,458 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:08,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:08,470 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-11-17 11:20:08,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:08,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 5/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:20:08,472 INFO L119 LiptonReduction]: Number of co-enabled transitions 224 [2023-11-17 11:20:09,732 INFO L134 LiptonReduction]: Checked pairs total: 395 [2023-11-17 11:20:09,732 INFO L136 LiptonReduction]: Total number of compositions: 23 [2023-11-17 11:20:09,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:09,746 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;@363aa504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:09,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:20:09,749 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:09,749 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 11:20:09,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:09,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:09,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:20:09,750 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 11:20:09,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:09,754 INFO L85 PathProgramCache]: Analyzing trace with hash -534379152, now seen corresponding path program 1 times [2023-11-17 11:20:09,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:09,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185465833] [2023-11-17 11:20:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:09,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:09,828 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:09,860 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:09,861 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:09,862 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:20:09,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:20:09,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:20:09,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:20:09,864 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:20:09,870 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:09,870 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:20:09,917 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:09,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:09,936 INFO L124 PetriNetUnfolderBase]: 10/68 cut-off events. [2023-11-17 11:20:09,936 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:09,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 10/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2023-11-17 11:20:09,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:09,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:09,939 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:09,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:09,939 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:09,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:09,946 INFO L124 PetriNetUnfolderBase]: 10/68 cut-off events. [2023-11-17 11:20:09,947 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:09,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 10/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2023-11-17 11:20:09,948 INFO L119 LiptonReduction]: Number of co-enabled transitions 2072 [2023-11-17 11:20:11,426 INFO L134 LiptonReduction]: Checked pairs total: 5014 [2023-11-17 11:20:11,426 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-11-17 11:20:11,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:11,433 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;@363aa504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:11,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:20:11,440 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:11,440 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-17 11:20:11,440 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:11,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:11,441 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:20:11,441 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 11:20:11,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1131810389, now seen corresponding path program 1 times [2023-11-17 11:20:11,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:11,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281090100] [2023-11-17 11:20:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:11,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:11,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:11,504 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:11,504 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:11,504 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:20:11,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:20:11,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:20:11,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:20:11,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:20:11,505 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:20:11,505 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:11,505 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:20:11,546 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:11,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:11,569 INFO L124 PetriNetUnfolderBase]: 15/100 cut-off events. [2023-11-17 11:20:11,569 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:20:11,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 15/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-17 11:20:11,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:11,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:11,573 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:11,574 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:11,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:11,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:11,591 INFO L124 PetriNetUnfolderBase]: 15/100 cut-off events. [2023-11-17 11:20:11,591 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:20:11,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 15/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-17 11:20:11,593 INFO L119 LiptonReduction]: Number of co-enabled transitions 5544 [2023-11-17 11:20:14,041 INFO L134 LiptonReduction]: Checked pairs total: 13994 [2023-11-17 11:20:14,042 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-17 11:20:14,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:14,044 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;@363aa504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:14,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:20:14,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:14,047 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-11-17 11:20:14,048 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:20:14,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:14,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:14,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:20:14,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:14,050 INFO L85 PathProgramCache]: Analyzing trace with hash -727752334, now seen corresponding path program 1 times [2023-11-17 11:20:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:14,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851885407] [2023-11-17 11:20:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:14,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:14,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851885407] [2023-11-17 11:20:14,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851885407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:14,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:14,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:20:14,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679046282] [2023-11-17 11:20:14,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:14,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:20:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:20:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:20:14,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 140 [2023-11-17 11:20:14,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:14,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:14,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 140 [2023-11-17 11:20:14,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:16,599 INFO L124 PetriNetUnfolderBase]: 23176/31845 cut-off events. [2023-11-17 11:20:16,599 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-11-17 11:20:16,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63490 conditions, 31845 events. 23176/31845 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 168482 event pairs, 5329 based on Foata normal form. 0/25245 useless extension candidates. Maximal degree in co-relation 27980. Up to 28462 conditions per place. [2023-11-17 11:20:16,769 INFO L140 encePairwiseOnDemand]: 129/140 looper letters, 69 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-17 11:20:16,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 330 flow [2023-11-17 11:20:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:20:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:20:16,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-17 11:20:16,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2023-11-17 11:20:16,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-17 11:20:16,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-17 11:20:16,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:16,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-17 11:20:16,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:16,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:16,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:16,785 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 136 flow. Second operand 3 states and 141 transitions. [2023-11-17 11:20:16,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 330 flow [2023-11-17 11:20:16,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 326 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:20:16,791 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 156 flow [2023-11-17 11:20:16,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-11-17 11:20:16,794 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-11-17 11:20:16,794 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 156 flow [2023-11-17 11:20:16,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:16,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:16,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:16,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:20:16,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:20:16,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1088314381, now seen corresponding path program 1 times [2023-11-17 11:20:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:16,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756991544] [2023-11-17 11:20:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:16,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:16,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:16,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756991544] [2023-11-17 11:20:16,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756991544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:16,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:16,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:20:16,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151317953] [2023-11-17 11:20:16,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:16,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:20:16,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:16,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:20:16,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:20:16,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 140 [2023-11-17 11:20:16,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:16,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:16,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 140 [2023-11-17 11:20:16,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:20,178 INFO L124 PetriNetUnfolderBase]: 34341/46535 cut-off events. [2023-11-17 11:20:20,178 INFO L125 PetriNetUnfolderBase]: For 2734/2734 co-relation queries the response was YES. [2023-11-17 11:20:20,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98360 conditions, 46535 events. 34341/46535 cut-off events. For 2734/2734 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 255643 event pairs, 6703 based on Foata normal form. 0/37607 useless extension candidates. Maximal degree in co-relation 82666. Up to 31026 conditions per place. [2023-11-17 11:20:20,360 INFO L140 encePairwiseOnDemand]: 133/140 looper letters, 142 selfloop transitions, 6 changer transitions 0/151 dead transitions. [2023-11-17 11:20:20,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 151 transitions, 684 flow [2023-11-17 11:20:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:20:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:20:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2023-11-17 11:20:20,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342857142857143 [2023-11-17 11:20:20,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 234 transitions. [2023-11-17 11:20:20,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 234 transitions. [2023-11-17 11:20:20,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:20,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 234 transitions. [2023-11-17 11:20:20,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,371 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 156 flow. Second operand 5 states and 234 transitions. [2023-11-17 11:20:20,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 151 transitions, 684 flow [2023-11-17 11:20:20,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 151 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:20:20,378 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 178 flow [2023-11-17 11:20:20,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-11-17 11:20:20,379 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2023-11-17 11:20:20,379 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 178 flow [2023-11-17 11:20:20,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:20,379 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:20:20,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:20:20,382 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 11:20:20,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash -781965201, now seen corresponding path program 1 times [2023-11-17 11:20:20,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:20,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543726421] [2023-11-17 11:20:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:20,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:20,397 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:20,414 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:20,414 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:20,414 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:20:20,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:20:20,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:20:20,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:20:20,414 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:20:20,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:20:20,415 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:20:20,415 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:20,415 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:20:20,450 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:20,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:20,471 INFO L124 PetriNetUnfolderBase]: 20/132 cut-off events. [2023-11-17 11:20:20,471 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:20:20,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 132 events. 20/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 406 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 115. Up to 5 conditions per place. [2023-11-17 11:20:20,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:20,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:20,473 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:20,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:20,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:20,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:20,482 INFO L124 PetriNetUnfolderBase]: 20/132 cut-off events. [2023-11-17 11:20:20,482 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:20:20,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 132 events. 20/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 406 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 115. Up to 5 conditions per place. [2023-11-17 11:20:20,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 10640 [2023-11-17 11:20:23,525 INFO L134 LiptonReduction]: Checked pairs total: 27086 [2023-11-17 11:20:23,525 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-17 11:20:23,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:23,526 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;@363aa504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:23,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:20:23,529 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:23,529 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-11-17 11:20:23,529 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:20:23,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:23,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:23,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:20:23,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:23,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1771119736, now seen corresponding path program 1 times [2023-11-17 11:20:23,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:23,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915128411] [2023-11-17 11:20:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:23,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:23,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:23,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915128411] [2023-11-17 11:20:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915128411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:23,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:23,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:20:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743825081] [2023-11-17 11:20:23,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:20:23,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:20:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:20:23,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 185 [2023-11-17 11:20:23,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:23,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:23,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 185 [2023-11-17 11:20:23,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:57,093 INFO L124 PetriNetUnfolderBase]: 403864/514329 cut-off events. [2023-11-17 11:20:57,094 INFO L125 PetriNetUnfolderBase]: For 25423/25423 co-relation queries the response was YES. [2023-11-17 11:20:57,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027211 conditions, 514329 events. 403864/514329 cut-off events. For 25423/25423 co-relation queries the response was YES. Maximal size of possible extension queue 7975. Compared 3033635 event pairs, 99079 based on Foata normal form. 0/400449 useless extension candidates. Maximal degree in co-relation 280729. Up to 482185 conditions per place. [2023-11-17 11:20:59,647 INFO L140 encePairwiseOnDemand]: 171/185 looper letters, 91 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2023-11-17 11:20:59,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 443 flow [2023-11-17 11:20:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:20:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:20:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-17 11:20:59,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:20:59,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-17 11:20:59,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-17 11:20:59,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:59,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-17 11:20:59,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:59,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:59,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:59,652 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 182 flow. Second operand 3 states and 185 transitions. [2023-11-17 11:20:59,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 443 flow [2023-11-17 11:20:59,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 431 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:20:59,669 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 205 flow [2023-11-17 11:20:59,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-11-17 11:20:59,672 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-11-17 11:20:59,672 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 205 flow [2023-11-17 11:20:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:59,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:59,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:20:59,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:20:59,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash 926734611, now seen corresponding path program 1 times [2023-11-17 11:20:59,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:59,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325307216] [2023-11-17 11:20:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:59,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:59,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:59,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325307216] [2023-11-17 11:20:59,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325307216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:59,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:59,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:20:59,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315789484] [2023-11-17 11:20:59,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:59,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:20:59,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:20:59,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:20:59,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 185 [2023-11-17 11:20:59,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:59,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:59,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 185 [2023-11-17 11:20:59,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand