/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/stack-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:14:51,154 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:14:51,240 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 11:14:51,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:14:51,270 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:14:51,270 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:14:51,271 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:14:51,271 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:14:51,272 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:14:51,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:14:51,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:14:51,276 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:14:51,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:14:51,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:14:51,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:14:51,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:14:51,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:14:51,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:14:51,279 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:14:51,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:14:51,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:14:51,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:14:51,281 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:14:51,281 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:14:51,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:14:51,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:14:51,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:14:51,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:14:51,282 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:14:51,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:14:51,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:14:51,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:14:51,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:14:51,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:14:51,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:14:51,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:14:51,556 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:14:51,556 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:14:51,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-11-17 11:14:52,693 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:14:52,971 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:14:52,972 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-11-17 11:14:52,986 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0133ac37/23c2434a92b04ec98f4466022f09c805/FLAGf90576bc3 [2023-11-17 11:14:52,999 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0133ac37/23c2434a92b04ec98f4466022f09c805 [2023-11-17 11:14:53,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:14:53,002 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:14:53,003 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:14:53,003 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:14:53,008 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:14:53,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67c83615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53, skipping insertion in model container [2023-11-17 11:14:53,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,074 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:14:53,423 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/stack-2.i[41520,41533] [2023-11-17 11:14:53,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:14:53,470 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:14:53,503 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/stack-2.i[41520,41533] [2023-11-17 11:14:53,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:14:53,582 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:14:53,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53 WrapperNode [2023-11-17 11:14:53,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:14:53,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:14:53,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:14:53,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:14:53,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,642 INFO L138 Inliner]: procedures = 278, calls = 46, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 165 [2023-11-17 11:14:53,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:14:53,643 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:14:53,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:14:53,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:14:53,651 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,655 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,655 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,662 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,668 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:14:53,672 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:14:53,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:14:53,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:14:53,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (1/1) ... [2023-11-17 11:14:53,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:14:53,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:14:53,722 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 11:14:53,724 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 11:14:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-17 11:14:53,744 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-17 11:14:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-17 11:14:53,744 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-17 11:14:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:14:53,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:14:53,745 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:14:53,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:14:53,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:14:53,745 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:14:53,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:14:53,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:14:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:14:53,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:14:53,747 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 11:14:53,859 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:14:53,861 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:14:54,168 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:14:54,441 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:14:54,442 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:14:54,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:14:54 BoogieIcfgContainer [2023-11-17 11:14:54,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:14:54,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:14:54,447 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:14:54,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:14:54,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:14:53" (1/3) ... [2023-11-17 11:14:54,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b3c26d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:14:54, skipping insertion in model container [2023-11-17 11:14:54,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:14:53" (2/3) ... [2023-11-17 11:14:54,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b3c26d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:14:54, skipping insertion in model container [2023-11-17 11:14:54,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:14:54" (3/3) ... [2023-11-17 11:14:54,451 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-17 11:14:54,463 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:14:54,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 11:14:54,463 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:14:54,519 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:14:54,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2023-11-17 11:14:54,598 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-11-17 11:14:54,598 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:14:54,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 5/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2023-11-17 11:14:54,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2023-11-17 11:14:54,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 73 flow [2023-11-17 11:14:54,619 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:14:54,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 32 transitions, 73 flow [2023-11-17 11:14:54,632 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 32 transitions, 73 flow [2023-11-17 11:14:54,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 32 transitions, 73 flow [2023-11-17 11:14:54,641 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2023-11-17 11:14:54,641 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:14:54,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 32 events. 5/32 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2023-11-17 11:14:54,642 INFO L119 LiptonReduction]: Number of co-enabled transitions 462 [2023-11-17 11:14:55,800 INFO L134 LiptonReduction]: Checked pairs total: 1508 [2023-11-17 11:14:55,800 INFO L136 LiptonReduction]: Total number of compositions: 21 [2023-11-17 11:14:55,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:14:55,827 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;@da1c509, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:14:55,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:14:55,831 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:14:55,832 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:14:55,832 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:14:55,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:14:55,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:14:55,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:14:55,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:14:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash 411463576, now seen corresponding path program 1 times [2023-11-17 11:14:55,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:14:55,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592679401] [2023-11-17 11:14:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:14:55,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:14:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:14:56,117 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 11:14:56,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:14:56,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592679401] [2023-11-17 11:14:56,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592679401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:14:56,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:14:56,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:14:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191007362] [2023-11-17 11:14:56,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:14:56,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:14:56,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:14:56,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:14:56,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:14:56,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 57 [2023-11-17 11:14:56,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 11:14:56,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:14:56,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 57 [2023-11-17 11:14:56,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:14:56,318 INFO L124 PetriNetUnfolderBase]: 225/390 cut-off events. [2023-11-17 11:14:56,318 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:14:56,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 390 events. 225/390 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1410 event pairs, 69 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 700. Up to 243 conditions per place. [2023-11-17 11:14:56,323 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 32 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-11-17 11:14:56,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 151 flow [2023-11-17 11:14:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:14:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:14:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2023-11-17 11:14:56,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38596491228070173 [2023-11-17 11:14:56,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2023-11-17 11:14:56,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2023-11-17 11:14:56,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:14:56,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2023-11-17 11:14:56,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 11:14:56,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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 11:14:56,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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 11:14:56,347 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 53 flow. Second operand 3 states and 66 transitions. [2023-11-17 11:14:56,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 151 flow [2023-11-17 11:14:56,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 143 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 11:14:56,350 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 56 flow [2023-11-17 11:14:56,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-17 11:14:56,354 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2023-11-17 11:14:56,355 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 56 flow [2023-11-17 11:14:56,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 11:14:56,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:14:56,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:14:56,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:14:56,356 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:14:56,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:14:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash 267126777, now seen corresponding path program 1 times [2023-11-17 11:14:56,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:14:56,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574874018] [2023-11-17 11:14:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:14:56,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:14:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:14:56,476 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 11:14:56,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:14:56,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574874018] [2023-11-17 11:14:56,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574874018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:14:56,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:14:56,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:14:56,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590882509] [2023-11-17 11:14:56,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:14:56,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:14:56,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:14:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:14:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:14:56,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 57 [2023-11-17 11:14:56,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 56 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 11:14:56,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:14:56,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 57 [2023-11-17 11:14:56,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:14:56,590 INFO L124 PetriNetUnfolderBase]: 228/395 cut-off events. [2023-11-17 11:14:56,591 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 11:14:56,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 395 events. 228/395 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1373 event pairs, 84 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 552. Up to 241 conditions per place. [2023-11-17 11:14:56,597 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 29 selfloop transitions, 2 changer transitions 3/34 dead transitions. [2023-11-17 11:14:56,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 153 flow [2023-11-17 11:14:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:14:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:14:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-17 11:14:56,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32748538011695905 [2023-11-17 11:14:56,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-17 11:14:56,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-17 11:14:56,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:14:56,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-17 11:14:56,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 11:14:56,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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 11:14:56,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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 11:14:56,602 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 56 flow. Second operand 3 states and 56 transitions. [2023-11-17 11:14:56,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 153 flow [2023-11-17 11:14:56,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:14:56,603 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 66 flow [2023-11-17 11:14:56,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-17 11:14:56,604 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 11:14:56,604 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 66 flow [2023-11-17 11:14:56,605 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 11:14:56,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:14:56,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:14:56,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:14:56,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:14:56,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:14:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2000575345, now seen corresponding path program 1 times [2023-11-17 11:14:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:14:56,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047055580] [2023-11-17 11:14:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:14:56,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:14:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:14:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:14:56,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:14:56,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047055580] [2023-11-17 11:14:56,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047055580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:14:56,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652297556] [2023-11-17 11:14:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:14:56,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:14:56,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:14:56,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:14:56,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:14:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:14:56,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:14:56,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:14:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:14:57,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:14:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:14:57,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652297556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:14:57,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:14:57,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-17 11:14:57,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169301723] [2023-11-17 11:14:57,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:14:57,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:14:57,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:14:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:14:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:14:57,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 57 [2023-11-17 11:14:57,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:14:57,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:14:57,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 57 [2023-11-17 11:14:57,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:14:57,461 INFO L124 PetriNetUnfolderBase]: 627/1086 cut-off events. [2023-11-17 11:14:57,462 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-17 11:14:57,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 1086 events. 627/1086 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4250 event pairs, 67 based on Foata normal form. 0/922 useless extension candidates. Maximal degree in co-relation 1990. Up to 243 conditions per place. [2023-11-17 11:14:57,468 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 88 selfloop transitions, 11 changer transitions 3/102 dead transitions. [2023-11-17 11:14:57,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 102 transitions, 471 flow [2023-11-17 11:14:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 11:14:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 11:14:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2023-11-17 11:14:57,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39035087719298245 [2023-11-17 11:14:57,473 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 178 transitions. [2023-11-17 11:14:57,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 178 transitions. [2023-11-17 11:14:57,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:14:57,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 178 transitions. [2023-11-17 11:14:57,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.25) internal successors, (178), 8 states have internal predecessors, (178), 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 11:14:57,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 57.0) internal successors, (513), 9 states have internal predecessors, (513), 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 11:14:57,477 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 57.0) internal successors, (513), 9 states have internal predecessors, (513), 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 11:14:57,477 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 66 flow. Second operand 8 states and 178 transitions. [2023-11-17 11:14:57,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 102 transitions, 471 flow [2023-11-17 11:14:57,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 102 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:14:57,479 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 160 flow [2023-11-17 11:14:57,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=160, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-11-17 11:14:57,480 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2023-11-17 11:14:57,480 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 160 flow [2023-11-17 11:14:57,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:14:57,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:14:57,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:14:57,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:14:57,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:14:57,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:14:57,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:14:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1671649002, now seen corresponding path program 1 times [2023-11-17 11:14:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:14:57,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086655126] [2023-11-17 11:14:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:14:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:14:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:14:57,824 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 11:14:57,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:14:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086655126] [2023-11-17 11:14:57,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086655126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:14:57,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:14:57,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:14:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355836613] [2023-11-17 11:14:57,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:14:57,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:14:57,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:14:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:14:57,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:14:57,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 57 [2023-11-17 11:14:57,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 11:14:57,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:14:57,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 57 [2023-11-17 11:14:57,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:14:57,971 INFO L124 PetriNetUnfolderBase]: 400/735 cut-off events. [2023-11-17 11:14:57,971 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-11-17 11:14:57,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 735 events. 400/735 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2930 event pairs, 124 based on Foata normal form. 0/653 useless extension candidates. Maximal degree in co-relation 1686. Up to 454 conditions per place. [2023-11-17 11:14:57,975 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-11-17 11:14:57,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 253 flow [2023-11-17 11:14:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:14:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:14:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2023-11-17 11:14:57,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391812865497076 [2023-11-17 11:14:57,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 58 transitions. [2023-11-17 11:14:57,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 58 transitions. [2023-11-17 11:14:57,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:14:57,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 58 transitions. [2023-11-17 11:14:57,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 11:14:57,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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 11:14:57,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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 11:14:57,979 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 160 flow. Second operand 3 states and 58 transitions. [2023-11-17 11:14:57,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 253 flow [2023-11-17 11:14:57,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 237 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-17 11:14:57,984 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 144 flow [2023-11-17 11:14:57,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-17 11:14:57,985 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2023-11-17 11:14:57,985 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 144 flow [2023-11-17 11:14:57,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 11:14:57,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:14:57,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:14:57,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:14:57,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:14:57,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:14:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1865112125, now seen corresponding path program 1 times [2023-11-17 11:14:57,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:14:57,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538453344] [2023-11-17 11:14:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:14:57,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:14:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:14:58,489 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 11:14:58,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:14:58,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538453344] [2023-11-17 11:14:58,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538453344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:14:58,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:14:58,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:14:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229355557] [2023-11-17 11:14:58,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:14:58,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:14:58,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:14:58,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:14:58,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:14:58,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 57 [2023-11-17 11:14:58,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 11:14:58,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:14:58,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 57 [2023-11-17 11:14:58,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:14:58,666 INFO L124 PetriNetUnfolderBase]: 456/838 cut-off events. [2023-11-17 11:14:58,666 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-11-17 11:14:58,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 838 events. 456/838 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3293 event pairs, 111 based on Foata normal form. 6/844 useless extension candidates. Maximal degree in co-relation 1916. Up to 623 conditions per place. [2023-11-17 11:14:58,672 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 49 selfloop transitions, 5 changer transitions 3/57 dead transitions. [2023-11-17 11:14:58,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 340 flow [2023-11-17 11:14:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:14:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:14:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2023-11-17 11:14:58,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2023-11-17 11:14:58,675 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 84 transitions. [2023-11-17 11:14:58,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 84 transitions. [2023-11-17 11:14:58,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:14:58,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 84 transitions. [2023-11-17 11:14:58,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.0) internal successors, (84), 4 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 11:14:58,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 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 11:14:58,678 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 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 11:14:58,678 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 144 flow. Second operand 4 states and 84 transitions. [2023-11-17 11:14:58,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 340 flow [2023-11-17 11:14:58,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:14:58,681 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 176 flow [2023-11-17 11:14:58,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-11-17 11:14:58,683 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2023-11-17 11:14:58,684 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 176 flow [2023-11-17 11:14:58,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 11:14:58,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:14:58,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:14:58,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:14:58,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:14:58,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:14:58,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2073876789, now seen corresponding path program 2 times [2023-11-17 11:14:58,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:14:58,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243989788] [2023-11-17 11:14:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:14:58,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:14:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:14:59,111 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 11:14:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:14:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243989788] [2023-11-17 11:14:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243989788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:14:59,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:14:59,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:14:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220022173] [2023-11-17 11:14:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:14:59,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:14:59,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:14:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:14:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:14:59,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 57 [2023-11-17 11:14:59,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 11:14:59,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:14:59,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 57 [2023-11-17 11:14:59,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:14:59,296 INFO L124 PetriNetUnfolderBase]: 450/832 cut-off events. [2023-11-17 11:14:59,297 INFO L125 PetriNetUnfolderBase]: For 431/431 co-relation queries the response was YES. [2023-11-17 11:14:59,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2181 conditions, 832 events. 450/832 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3239 event pairs, 137 based on Foata normal form. 6/838 useless extension candidates. Maximal degree in co-relation 1850. Up to 522 conditions per place. [2023-11-17 11:14:59,302 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 46 selfloop transitions, 6 changer transitions 3/55 dead transitions. [2023-11-17 11:14:59,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 337 flow [2023-11-17 11:14:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:14:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:14:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2023-11-17 11:14:59,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2023-11-17 11:14:59,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 84 transitions. [2023-11-17 11:14:59,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 84 transitions. [2023-11-17 11:14:59,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:14:59,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 84 transitions. [2023-11-17 11:14:59,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.0) internal successors, (84), 4 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 11:14:59,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 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 11:14:59,306 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 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 11:14:59,306 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 176 flow. Second operand 4 states and 84 transitions. [2023-11-17 11:14:59,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 337 flow [2023-11-17 11:14:59,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:14:59,310 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 173 flow [2023-11-17 11:14:59,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-17 11:14:59,313 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2023-11-17 11:14:59,313 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 173 flow [2023-11-17 11:14:59,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 11:14:59,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:14:59,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:14:59,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:14:59,313 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:14:59,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:14:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1435894088, now seen corresponding path program 1 times [2023-11-17 11:14:59,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:14:59,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131301295] [2023-11-17 11:14:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:14:59,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:14:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:14:59,372 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:14:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:14:59,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:14:59,458 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:14:59,458 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-17 11:14:59,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-17 11:14:59,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-17 11:14:59,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:14:59,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:14:59,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:14:59,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:14:59,462 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-17 11:14:59,466 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 11:14:59,466 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 11:14:59,495 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-17 11:14:59,496 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated [2023-11-17 11:14:59,497 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret46 could not be translated [2023-11-17 11:14:59,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 11:14:59 BasicIcfg [2023-11-17 11:14:59,504 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 11:14:59,505 INFO L158 Benchmark]: Toolchain (without parser) took 6502.70ms. Allocated memory was 207.6MB in the beginning and 312.5MB in the end (delta: 104.9MB). Free memory was 145.3MB in the beginning and 229.7MB in the end (delta: -84.4MB). Peak memory consumption was 21.2MB. Max. memory is 8.0GB. [2023-11-17 11:14:59,505 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 207.6MB. Free memory is still 159.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 11:14:59,505 INFO L158 Benchmark]: CACSL2BoogieTranslator took 579.94ms. Allocated memory was 207.6MB in the beginning and 260.0MB in the end (delta: 52.4MB). Free memory was 145.0MB in the beginning and 215.9MB in the end (delta: -70.8MB). Peak memory consumption was 27.2MB. Max. memory is 8.0GB. [2023-11-17 11:14:59,506 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.74ms. Allocated memory is still 260.0MB. Free memory was 215.9MB in the beginning and 212.7MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 11:14:59,506 INFO L158 Benchmark]: Boogie Preprocessor took 28.12ms. Allocated memory is still 260.0MB. Free memory was 212.7MB in the beginning and 211.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 11:14:59,506 INFO L158 Benchmark]: RCFGBuilder took 772.95ms. Allocated memory is still 260.0MB. Free memory was 211.1MB in the beginning and 166.1MB in the end (delta: 45.1MB). Peak memory consumption was 45.1MB. Max. memory is 8.0GB. [2023-11-17 11:14:59,507 INFO L158 Benchmark]: TraceAbstraction took 5057.88ms. Allocated memory was 260.0MB in the beginning and 312.5MB in the end (delta: 52.4MB). Free memory was 165.5MB in the beginning and 229.7MB in the end (delta: -64.2MB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 11:14:59,508 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 207.6MB. Free memory is still 159.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 579.94ms. Allocated memory was 207.6MB in the beginning and 260.0MB in the end (delta: 52.4MB). Free memory was 145.0MB in the beginning and 215.9MB in the end (delta: -70.8MB). Peak memory consumption was 27.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 58.74ms. Allocated memory is still 260.0MB. Free memory was 215.9MB in the beginning and 212.7MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.12ms. Allocated memory is still 260.0MB. Free memory was 212.7MB in the beginning and 211.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 772.95ms. Allocated memory is still 260.0MB. Free memory was 211.1MB in the beginning and 166.1MB in the end (delta: 45.1MB). Peak memory consumption was 45.1MB. Max. memory is 8.0GB. * TraceAbstraction took 5057.88ms. Allocated memory was 260.0MB in the beginning and 312.5MB in the end (delta: 52.4MB). Free memory was 165.5MB in the beginning and 229.7MB in the end (delta: -64.2MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret46 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 34 PlacesBefore, 25 PlacesAfterwards, 32 TransitionsBefore, 22 TransitionsAfterwards, 462 CoEnabledTransitionPairs, 5 FixpointIterations, 0 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 1 ChoiceCompositions, 21 TotalNumberOfCompositions, 1508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 862, independent: 771, independent conditional: 0, independent unconditional: 771, dependent: 85, dependent conditional: 0, dependent unconditional: 85, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 365, independent: 345, independent conditional: 0, independent unconditional: 345, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 365, independent: 311, independent conditional: 0, independent unconditional: 311, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 54, independent: 34, independent conditional: 0, independent unconditional: 34, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , SemanticIndependenceRelation.Query Time [ms]: [ total: 178, independent: 52, independent conditional: 0, independent unconditional: 52, dependent: 116, dependent conditional: 0, dependent unconditional: 116, unknown: 11, unknown conditional: 0, unknown unconditional: 11] ], Cache Queries: [ total: 862, independent: 426, independent conditional: 0, independent unconditional: 426, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 370, unknown conditional: 0, unknown unconditional: 370] , Statistics on independence cache: Total cache size (in pairs): 73, Positive cache size: 64, Positive conditional cache size: 0, Positive unconditional cache size: 64, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 1, Unknown conditional cache size: 0, Unknown unconditional cache size: 1 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 56 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.9s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 167 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 167 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 395 IncrementalHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 0 mSDtfsCounter, 395 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=5, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 609 SizeOfPredicates, 8 NumberOfNonLiveVariables, 153 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-17 11:14:59,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...