/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/40_barrier_vf-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:22:35,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:22:35,584 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 11:22:35,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:22:35,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:22:35,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:22:35,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:22:35,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:22:35,615 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:22:35,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:22:35,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:22:35,616 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:22:35,620 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:22:35,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:22:35,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:22:35,623 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:22:35,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:22:35,624 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:22:35,625 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:22:35,625 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:22:35,625 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:22:35,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:22:35,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:22:35,626 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:22:35,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:22:35,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:35,626 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:22:35,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:22:35,627 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:22:35,627 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:22:35,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:22:35,628 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:22:35,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:22:35,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:22:35,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:22:35,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:22:35,838 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:22:35,838 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:22:35,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2023-11-17 11:22:37,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:22:37,194 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:22:37,205 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf-pthread.i [2023-11-17 11:22:37,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/568e127b5/bfc1aa439ee640a7a02b64b83d33ae47/FLAG9bfee7607 [2023-11-17 11:22:37,229 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/568e127b5/bfc1aa439ee640a7a02b64b83d33ae47 [2023-11-17 11:22:37,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:22:37,233 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:22:37,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:37,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:22:37,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:22:37,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633007d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37, skipping insertion in model container [2023-11-17 11:22:37,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,287 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:22:37,474 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/40_barrier_vf-pthread.i[30842,30855] [2023-11-17 11:22:37,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:37,502 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:22:37,556 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/40_barrier_vf-pthread.i[30842,30855] [2023-11-17 11:22:37,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:37,608 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:22:37,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37 WrapperNode [2023-11-17 11:22:37,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:37,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:37,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:22:37,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:22:37,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,643 INFO L138 Inliner]: procedures = 165, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-11-17 11:22:37,645 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:37,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:22:37,646 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:22:37,646 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:22:37,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,663 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,670 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,671 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:22:37,677 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:22:37,677 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:22:37,677 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:22:37,678 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (1/1) ... [2023-11-17 11:22:37,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:37,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:22:37,719 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 11:22:37,725 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 11:22:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:22:37,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:22:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:22:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:22:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:22:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:22:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:22:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:22:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:22:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:22:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:22:37,744 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 11:22:37,856 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:22:37,857 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:22:37,983 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:22:38,124 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:22:38,124 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 11:22:38,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:38 BoogieIcfgContainer [2023-11-17 11:22:38,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:22:38,127 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:22:38,127 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:22:38,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:22:38,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:22:37" (1/3) ... [2023-11-17 11:22:38,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c87beb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:38, skipping insertion in model container [2023-11-17 11:22:38,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:37" (2/3) ... [2023-11-17 11:22:38,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c87beb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:38, skipping insertion in model container [2023-11-17 11:22:38,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:38" (3/3) ... [2023-11-17 11:22:38,131 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf-pthread.i [2023-11-17 11:22:38,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:22:38,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:22:38,147 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:22:38,182 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:38,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 20 transitions, 44 flow [2023-11-17 11:22:38,236 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2023-11-17 11:22:38,236 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:38,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 2/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-17 11:22:38,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 20 transitions, 44 flow [2023-11-17 11:22:38,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 20 transitions, 44 flow [2023-11-17 11:22:38,251 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:38,263 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 20 transitions, 44 flow [2023-11-17 11:22:38,270 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 20 transitions, 44 flow [2023-11-17 11:22:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 20 transitions, 44 flow [2023-11-17 11:22:38,282 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2023-11-17 11:22:38,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:38,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 2/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-17 11:22:38,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 112 [2023-11-17 11:22:38,641 INFO L134 LiptonReduction]: Checked pairs total: 116 [2023-11-17 11:22:38,641 INFO L136 LiptonReduction]: Total number of compositions: 11 [2023-11-17 11:22:38,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:38,664 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;@303df949, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:38,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:22:38,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:38,668 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-17 11:22:38,668 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:38,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:38,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:22:38,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:22:38,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash 205133221, now seen corresponding path program 1 times [2023-11-17 11:22:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704309634] [2023-11-17 11:22:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:38,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:38,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704309634] [2023-11-17 11:22:38,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704309634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:38,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:38,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:38,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749542826] [2023-11-17 11:22:38,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:39,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2023-11-17 11:22:39,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 12 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:39,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2023-11-17 11:22:39,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:39,053 INFO L124 PetriNetUnfolderBase]: 9/24 cut-off events. [2023-11-17 11:22:39,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:39,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 24 events. 9/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 40. Up to 19 conditions per place. [2023-11-17 11:22:39,056 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 8 selfloop transitions, 2 changer transitions 0/11 dead transitions. [2023-11-17 11:22:39,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 11 transitions, 46 flow [2023-11-17 11:22:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2023-11-17 11:22:39,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24731182795698925 [2023-11-17 11:22:39,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 23 transitions. [2023-11-17 11:22:39,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 23 transitions. [2023-11-17 11:22:39,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:39,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 23 transitions. [2023-11-17 11:22:39,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,072 INFO L175 Difference]: Start difference. First operand has 13 places, 12 transitions, 28 flow. Second operand 3 states and 23 transitions. [2023-11-17 11:22:39,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 11 transitions, 46 flow [2023-11-17 11:22:39,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:39,075 INFO L231 Difference]: Finished difference. Result has 13 places, 9 transitions, 26 flow [2023-11-17 11:22:39,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=13, PETRI_TRANSITIONS=9} [2023-11-17 11:22:39,081 INFO L281 CegarLoopForPetriNet]: 13 programPoint places, 0 predicate places. [2023-11-17 11:22:39,081 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 9 transitions, 26 flow [2023-11-17 11:22:39,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:39,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:22:39,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:22:39,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:22:39,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:39,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2064132221, now seen corresponding path program 1 times [2023-11-17 11:22:39,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:39,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069474680] [2023-11-17 11:22:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:39,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:39,119 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:39,147 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:39,148 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:39,149 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:22:39,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:22:39,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:22:39,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:22:39,151 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:39,154 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:39,154 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:22:39,169 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:39,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions, 80 flow [2023-11-17 11:22:39,184 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2023-11-17 11:22:39,184 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:39,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:22:39,185 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 35 transitions, 80 flow [2023-11-17 11:22:39,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 35 transitions, 80 flow [2023-11-17 11:22:39,187 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:39,188 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 35 transitions, 80 flow [2023-11-17 11:22:39,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 35 transitions, 80 flow [2023-11-17 11:22:39,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions, 80 flow [2023-11-17 11:22:39,200 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2023-11-17 11:22:39,200 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:39,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:22:39,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 644 [2023-11-17 11:22:39,503 INFO L134 LiptonReduction]: Checked pairs total: 1175 [2023-11-17 11:22:39,504 INFO L136 LiptonReduction]: Total number of compositions: 10 [2023-11-17 11:22:39,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:39,510 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;@303df949, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:39,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:22:39,514 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:39,514 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 11:22:39,514 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:22:39,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:39,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:39,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:39,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:39,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1894422427, now seen corresponding path program 1 times [2023-11-17 11:22:39,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:39,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929557825] [2023-11-17 11:22:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:39,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:39,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:39,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929557825] [2023-11-17 11:22:39,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929557825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:39,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:39,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:22:39,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349342547] [2023-11-17 11:22:39,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:39,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:22:39,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:39,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:22:39,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:22:39,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 45 [2023-11-17 11:22:39,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:39,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 45 [2023-11-17 11:22:39,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:39,694 INFO L124 PetriNetUnfolderBase]: 409/689 cut-off events. [2023-11-17 11:22:39,695 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-17 11:22:39,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 689 events. 409/689 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2928 event pairs, 64 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 1136. Up to 252 conditions per place. [2023-11-17 11:22:39,700 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 45 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-11-17 11:22:39,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 55 transitions, 229 flow [2023-11-17 11:22:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:22:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:22:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2023-11-17 11:22:39,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2023-11-17 11:22:39,701 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 85 transitions. [2023-11-17 11:22:39,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 85 transitions. [2023-11-17 11:22:39,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:39,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 85 transitions. [2023-11-17 11:22:39,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 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 11:22:39,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,703 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,703 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 68 flow. Second operand 4 states and 85 transitions. [2023-11-17 11:22:39,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 55 transitions, 229 flow [2023-11-17 11:22:39,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 55 transitions, 229 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:39,704 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 80 flow [2023-11-17 11:22:39,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-11-17 11:22:39,705 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-11-17 11:22:39,705 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 80 flow [2023-11-17 11:22:39,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:39,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:39,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:22:39,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:39,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1894421900, now seen corresponding path program 1 times [2023-11-17 11:22:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:39,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141390107] [2023-11-17 11:22:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:39,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141390107] [2023-11-17 11:22:39,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141390107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:39,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:39,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:39,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481297713] [2023-11-17 11:22:39,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:39,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:39,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:39,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:39,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 45 [2023-11-17 11:22:39,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:39,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 45 [2023-11-17 11:22:39,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:39,816 INFO L124 PetriNetUnfolderBase]: 341/569 cut-off events. [2023-11-17 11:22:39,817 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-11-17 11:22:39,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 569 events. 341/569 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2246 event pairs, 139 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 479. Up to 273 conditions per place. [2023-11-17 11:22:39,820 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 30 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-11-17 11:22:39,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 162 flow [2023-11-17 11:22:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2023-11-17 11:22:39,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2023-11-17 11:22:39,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 48 transitions. [2023-11-17 11:22:39,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 48 transitions. [2023-11-17 11:22:39,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:39,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 48 transitions. [2023-11-17 11:22:39,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,823 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 80 flow. Second operand 3 states and 48 transitions. [2023-11-17 11:22:39,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 162 flow [2023-11-17 11:22:39,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 162 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:39,824 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 93 flow [2023-11-17 11:22:39,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-11-17 11:22:39,825 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-11-17 11:22:39,825 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 93 flow [2023-11-17 11:22:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:39,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:22:39,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:22:39,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:39,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:39,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1614698821, now seen corresponding path program 1 times [2023-11-17 11:22:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:39,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404100760] [2023-11-17 11:22:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:39,836 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:39,843 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:39,843 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:39,843 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:22:39,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:22:39,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:22:39,844 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:22:39,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:22:39,844 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:22:39,845 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:39,845 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:22:39,858 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:39,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 50 transitions, 118 flow [2023-11-17 11:22:39,865 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2023-11-17 11:22:39,865 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:39,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 6/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 151 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-11-17 11:22:39,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 50 transitions, 118 flow [2023-11-17 11:22:39,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 50 transitions, 118 flow [2023-11-17 11:22:39,867 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:39,867 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 51 places, 50 transitions, 118 flow [2023-11-17 11:22:39,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 51 places, 50 transitions, 118 flow [2023-11-17 11:22:39,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 50 transitions, 118 flow [2023-11-17 11:22:39,871 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2023-11-17 11:22:39,872 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:39,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 6/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 151 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-11-17 11:22:39,873 INFO L119 LiptonReduction]: Number of co-enabled transitions 1596 [2023-11-17 11:22:40,225 INFO L134 LiptonReduction]: Checked pairs total: 2801 [2023-11-17 11:22:40,225 INFO L136 LiptonReduction]: Total number of compositions: 15 [2023-11-17 11:22:40,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:40,227 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;@303df949, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:40,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:22:40,229 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:40,229 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2023-11-17 11:22:40,230 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:22:40,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:40,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:40,230 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 11:22:40,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1302131342, now seen corresponding path program 1 times [2023-11-17 11:22:40,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:40,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960914459] [2023-11-17 11:22:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:40,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:40,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:40,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960914459] [2023-11-17 11:22:40,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960914459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:40,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:40,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373776941] [2023-11-17 11:22:40,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:40,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:40,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:40,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 65 [2023-11-17 11:22:40,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:40,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 65 [2023-11-17 11:22:40,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:40,870 INFO L124 PetriNetUnfolderBase]: 6940/9419 cut-off events. [2023-11-17 11:22:40,870 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2023-11-17 11:22:40,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19070 conditions, 9419 events. 6940/9419 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 46052 event pairs, 1819 based on Foata normal form. 0/8544 useless extension candidates. Maximal degree in co-relation 3679. Up to 6880 conditions per place. [2023-11-17 11:22:40,937 INFO L140 encePairwiseOnDemand]: 54/65 looper letters, 51 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-11-17 11:22:40,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 59 transitions, 258 flow [2023-11-17 11:22:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-17 11:22:40,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-11-17 11:22:40,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-17 11:22:40,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-17 11:22:40,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:40,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-17 11:22:40,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,940 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 100 flow. Second operand 3 states and 84 transitions. [2023-11-17 11:22:40,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 59 transitions, 258 flow [2023-11-17 11:22:40,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 254 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:40,942 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 120 flow [2023-11-17 11:22:40,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-11-17 11:22:40,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-17 11:22:40,943 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 120 flow [2023-11-17 11:22:40,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:40,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:40,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:22:40,944 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 11:22:40,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1302131466, now seen corresponding path program 1 times [2023-11-17 11:22:40,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:40,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643886429] [2023-11-17 11:22:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:40,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:40,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:40,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643886429] [2023-11-17 11:22:40,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643886429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:40,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:40,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:22:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072839092] [2023-11-17 11:22:40,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:40,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:22:40,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:22:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:22:40,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 65 [2023-11-17 11:22:40,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:40,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:40,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 65 [2023-11-17 11:22:40,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:41,612 INFO L124 PetriNetUnfolderBase]: 5257/7594 cut-off events. [2023-11-17 11:22:41,612 INFO L125 PetriNetUnfolderBase]: For 1021/1021 co-relation queries the response was YES. [2023-11-17 11:22:41,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16088 conditions, 7594 events. 5257/7594 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 41373 event pairs, 1593 based on Foata normal form. 645/8236 useless extension candidates. Maximal degree in co-relation 14679. Up to 3707 conditions per place. [2023-11-17 11:22:41,655 INFO L140 encePairwiseOnDemand]: 58/65 looper letters, 69 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2023-11-17 11:22:41,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 83 transitions, 379 flow [2023-11-17 11:22:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:22:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:22:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2023-11-17 11:22:41,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2023-11-17 11:22:41,657 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 113 transitions. [2023-11-17 11:22:41,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 113 transitions. [2023-11-17 11:22:41,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:41,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 113 transitions. [2023-11-17 11:22:41,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,658 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,658 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 120 flow. Second operand 4 states and 113 transitions. [2023-11-17 11:22:41,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 83 transitions, 379 flow [2023-11-17 11:22:41,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 83 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:22:41,660 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 142 flow [2023-11-17 11:22:41,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-11-17 11:22:41,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-11-17 11:22:41,661 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 142 flow [2023-11-17 11:22:41,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:41,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:41,662 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:22:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:22:41,662 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 11:22:41,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash 356715996, now seen corresponding path program 1 times [2023-11-17 11:22:41,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:41,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172993893] [2023-11-17 11:22:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:41,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:41,680 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:41,681 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:41,681 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:22:41,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:22:41,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:22:41,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:22:41,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:22:41,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:22:41,681 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:22:41,682 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:41,682 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:22:41,696 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:41,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 65 transitions, 158 flow [2023-11-17 11:22:41,703 INFO L124 PetriNetUnfolderBase]: 8/76 cut-off events. [2023-11-17 11:22:41,703 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:41,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 8/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 204 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2023-11-17 11:22:41,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 65 transitions, 158 flow [2023-11-17 11:22:41,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 65 transitions, 158 flow [2023-11-17 11:22:41,705 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:41,705 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 65 transitions, 158 flow [2023-11-17 11:22:41,705 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 65 transitions, 158 flow [2023-11-17 11:22:41,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 65 transitions, 158 flow [2023-11-17 11:22:41,710 INFO L124 PetriNetUnfolderBase]: 8/76 cut-off events. [2023-11-17 11:22:41,710 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:41,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 8/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 204 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2023-11-17 11:22:41,712 INFO L119 LiptonReduction]: Number of co-enabled transitions 2968 [2023-11-17 11:22:42,139 INFO L134 LiptonReduction]: Checked pairs total: 5344 [2023-11-17 11:22:42,139 INFO L136 LiptonReduction]: Total number of compositions: 20 [2023-11-17 11:22:42,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:42,142 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;@303df949, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:42,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:22:42,145 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:42,145 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-17 11:22:42,145 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:22:42,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:42,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:42,145 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 11:22:42,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1453207741, now seen corresponding path program 1 times [2023-11-17 11:22:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981769542] [2023-11-17 11:22:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:42,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:42,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981769542] [2023-11-17 11:22:42,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981769542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:42,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:42,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:22:42,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102985518] [2023-11-17 11:22:42,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:42,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:22:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:22:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:22:42,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 85 [2023-11-17 11:22:42,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:42,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:42,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 85 [2023-11-17 11:22:42,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:49,583 INFO L124 PetriNetUnfolderBase]: 104609/137109 cut-off events. [2023-11-17 11:22:49,584 INFO L125 PetriNetUnfolderBase]: For 9715/9715 co-relation queries the response was YES. [2023-11-17 11:22:50,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274648 conditions, 137109 events. 104609/137109 cut-off events. For 9715/9715 co-relation queries the response was YES. Maximal size of possible extension queue 5158. Compared 857048 event pairs, 25622 based on Foata normal form. 0/131700 useless extension candidates. Maximal degree in co-relation 126680. Up to 48796 conditions per place. [2023-11-17 11:22:50,808 INFO L140 encePairwiseOnDemand]: 71/85 looper letters, 103 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2023-11-17 11:22:50,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 121 transitions, 539 flow [2023-11-17 11:22:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:22:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:22:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2023-11-17 11:22:50,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2023-11-17 11:22:50,826 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 175 transitions. [2023-11-17 11:22:50,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 175 transitions. [2023-11-17 11:22:50,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:50,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 175 transitions. [2023-11-17 11:22:50,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:50,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:50,828 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:50,828 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 134 flow. Second operand 4 states and 175 transitions. [2023-11-17 11:22:50,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 121 transitions, 539 flow [2023-11-17 11:22:50,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 121 transitions, 521 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:50,837 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 168 flow [2023-11-17 11:22:50,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2023-11-17 11:22:50,838 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-11-17 11:22:50,838 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 168 flow [2023-11-17 11:22:50,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:50,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:50,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:50,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:22:50,839 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 11:22:50,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:50,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1453207772, now seen corresponding path program 1 times [2023-11-17 11:22:50,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:50,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204968806] [2023-11-17 11:22:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:50,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204968806] [2023-11-17 11:22:50,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204968806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:50,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:50,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:50,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680567050] [2023-11-17 11:22:50,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:50,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:50,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:50,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:50,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:50,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 85 [2023-11-17 11:22:50,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:50,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:50,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 85 [2023-11-17 11:22:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:59,898 INFO L124 PetriNetUnfolderBase]: 140458/179990 cut-off events. [2023-11-17 11:22:59,899 INFO L125 PetriNetUnfolderBase]: For 14176/14176 co-relation queries the response was YES. [2023-11-17 11:23:00,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374823 conditions, 179990 events. 140458/179990 cut-off events. For 14176/14176 co-relation queries the response was YES. Maximal size of possible extension queue 6402. Compared 1095144 event pairs, 35432 based on Foata normal form. 0/153844 useless extension candidates. Maximal degree in co-relation 183596. Up to 159029 conditions per place. [2023-11-17 11:23:01,176 INFO L140 encePairwiseOnDemand]: 76/85 looper letters, 78 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2023-11-17 11:23:01,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 88 transitions, 432 flow [2023-11-17 11:23:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-11-17 11:23:01,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 11:23:01,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-11-17 11:23:01,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-11-17 11:23:01,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:01,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-11-17 11:23:01,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 11:23:01,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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 11:23:01,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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 11:23:01,205 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 168 flow. Second operand 3 states and 102 transitions. [2023-11-17 11:23:01,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 88 transitions, 432 flow [2023-11-17 11:23:01,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:01,213 INFO L231 Difference]: Finished difference. Result has 55 places, 60 transitions, 215 flow [2023-11-17 11:23:01,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=55, PETRI_TRANSITIONS=60} [2023-11-17 11:23:01,215 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-11-17 11:23:01,215 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 60 transitions, 215 flow [2023-11-17 11:23:01,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 11:23:01,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:01,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:01,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:23:01,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:23:01,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1580696092, now seen corresponding path program 1 times [2023-11-17 11:23:01,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:01,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997439100] [2023-11-17 11:23:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:01,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:23:01,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:01,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997439100] [2023-11-17 11:23:01,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997439100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:01,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:01,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:23:01,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573919612] [2023-11-17 11:23:01,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:01,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:01,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:01,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 85 [2023-11-17 11:23:01,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 11:23:01,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:01,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 85 [2023-11-17 11:23:01,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:02,292 INFO L124 PetriNetUnfolderBase]: 12391/20788 cut-off events. [2023-11-17 11:23:02,292 INFO L125 PetriNetUnfolderBase]: For 1623/1623 co-relation queries the response was YES. [2023-11-17 11:23:02,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43094 conditions, 20788 events. 12391/20788 cut-off events. For 1623/1623 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 158225 event pairs, 2879 based on Foata normal form. 4476/25264 useless extension candidates. Maximal degree in co-relation 23927. Up to 10295 conditions per place. [2023-11-17 11:23:02,377 INFO L140 encePairwiseOnDemand]: 65/85 looper letters, 40 selfloop transitions, 20 changer transitions 0/69 dead transitions. [2023-11-17 11:23:02,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 368 flow [2023-11-17 11:23:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2023-11-17 11:23:02,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2023-11-17 11:23:02,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2023-11-17 11:23:02,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2023-11-17 11:23:02,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:02,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2023-11-17 11:23:02,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 11:23:02,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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 11:23:02,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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 11:23:02,380 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 215 flow. Second operand 3 states and 95 transitions. [2023-11-17 11:23:02,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 368 flow [2023-11-17 11:23:02,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 69 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:23:02,382 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 250 flow [2023-11-17 11:23:02,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-11-17 11:23:02,383 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-11-17 11:23:02,383 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 250 flow [2023-11-17 11:23:02,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 11:23:02,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:02,383 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:02,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:23:02,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:23:02,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:02,383 INFO L85 PathProgramCache]: Analyzing trace with hash -343858324, now seen corresponding path program 1 times [2023-11-17 11:23:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:02,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156177725] [2023-11-17 11:23:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:02,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:02,393 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:02,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:02,400 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:02,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:23:02,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:23:02,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:23:02,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:23:02,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:23:02,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:23:02,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:23:02,401 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:23:02,401 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:02,401 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:23:02,416 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:02,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 200 flow [2023-11-17 11:23:02,422 INFO L124 PetriNetUnfolderBase]: 10/94 cut-off events. [2023-11-17 11:23:02,422 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:23:02,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 94 events. 10/94 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 262 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2023-11-17 11:23:02,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 200 flow [2023-11-17 11:23:02,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 80 transitions, 200 flow [2023-11-17 11:23:02,423 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:02,423 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 80 transitions, 200 flow [2023-11-17 11:23:02,423 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 80 transitions, 200 flow [2023-11-17 11:23:02,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 200 flow [2023-11-17 11:23:02,427 INFO L124 PetriNetUnfolderBase]: 10/94 cut-off events. [2023-11-17 11:23:02,428 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:23:02,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 94 events. 10/94 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 262 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2023-11-17 11:23:02,429 INFO L119 LiptonReduction]: Number of co-enabled transitions 4760 [2023-11-17 11:23:02,936 INFO L134 LiptonReduction]: Checked pairs total: 8834 [2023-11-17 11:23:02,937 INFO L136 LiptonReduction]: Total number of compositions: 25 [2023-11-17 11:23:02,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:02,938 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;@303df949, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:02,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:23:02,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:02,941 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-17 11:23:02,941 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:23:02,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:02,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:02,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:23:02,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:02,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1565518471, now seen corresponding path program 1 times [2023-11-17 11:23:02,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:02,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379394472] [2023-11-17 11:23:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:02,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:02,983 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 11:23:02,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:02,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379394472] [2023-11-17 11:23:02,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379394472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:02,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:23:02,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24755977] [2023-11-17 11:23:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:02,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:23:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:23:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:23:02,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 105 [2023-11-17 11:23:02,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 11:23:02,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:02,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 105 [2023-11-17 11:23:02,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand