/usr/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-MCRwithoutDepranks-Lazy.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 16:07:27,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 16:07:27,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 16:07:27,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-10 16:07:27,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-10 16:07:27,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-10 16:07:27,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-10 16:07:27,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-10 16:07:27,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-10 16:07:27,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-10 16:07:27,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-10 16:07:27,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-10 16:07:27,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-10 16:07:27,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-10 16:07:27,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-10 16:07:27,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-10 16:07:27,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-10 16:07:27,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-10 16:07:27,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-10 16:07:27,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-10 16:07:27,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-10 16:07:27,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-10 16:07:27,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-10 16:07:27,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-10 16:07:27,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-10 16:07:27,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-10 16:07:27,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-10 16:07:27,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-10 16:07:27,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithoutDepranks-Lazy.epf [2022-02-10 16:07:27,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 16:07:27,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 16:07:27,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 16:07:27,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 16:07:27,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 16:07:27,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 16:07:27,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 16:07:27,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 16:07:27,303 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 16:07:27,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 16:07:27,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 16:07:27,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 16:07:27,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * Construct finite automaton lazily=true [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 16:07:27,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 16:07:27,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 16:07:27,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 16:07:27,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-02-10 16:07:27,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 16:07:27,306 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITHOUT_DEPRANKS [2022-02-10 16:07:27,306 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 16:07:27,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 16:07:27,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 16:07:27,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 16:07:27,508 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 16:07:27,509 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 16:07:27,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl [2022-02-10 16:07:27,510 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl' [2022-02-10 16:07:27,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 16:07:27,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 16:07:27,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 16:07:27,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 16:07:27,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 16:07:27,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,543 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 16:07:27,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 16:07:27,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 16:07:27,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 16:07:27,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 16:07:27,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 16:07:27,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 16:07:27,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 16:07:27,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 16:07:27,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/1) ... [2022-02-10 16:07:27,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 16:07:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 16:07:27,580 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) [2022-02-10 16:07:27,595 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 [2022-02-10 16:07:27,609 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 16:07:27,609 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 16:07:27,609 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 16:07:27,610 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 16:07:27,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 16:07:27,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 16:07:27,610 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 16:07:27,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 16:07:27,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 16:07:27,610 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 16:07:27,627 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 16:07:27,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 16:07:27,674 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 16:07:27,679 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 16:07:27,680 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 16:07:27,683 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 04:07:27 BoogieIcfgContainer [2022-02-10 16:07:27,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 16:07:27,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 16:07:27,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 16:07:27,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 16:07:27,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 04:07:27" (1/2) ... [2022-02-10 16:07:27,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e76942d and model type nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 04:07:27, skipping insertion in model container [2022-02-10 16:07:27,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 04:07:27" (2/2) ... [2022-02-10 16:07:27,691 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_fork.bpl [2022-02-10 16:07:27,703 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 16:07:27,703 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 16:07:27,703 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 16:07:27,703 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 16:07:27,745 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-02-10 16:07:27,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-02-10 16:07:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 16:07:27,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-02-10 16:07:27,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-02-10 16:07:27,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 16:07:27,831 INFO L339 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=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mLazyFiniteAutomaton=true, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-10 16:07:27,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-10 16:07:27,855 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 8 transitions and produced 9 states. [2022-02-10 16:07:27,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, thread1Thread1of1ForFork1Err0INUSE_VIOLATION] === [2022-02-10 16:07:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 16:07:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1046076718, now seen corresponding path program 1 times [2022-02-10 16:07:27,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 16:07:27,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517266624] [2022-02-10 16:07:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 16:07:27,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 16:07:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 16:07:27,913 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-10 16:07:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 16:07:27,927 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-10 16:07:27,928 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-10 16:07:27,929 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-10 16:07:27,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2INUSE_VIOLATION (2 of 4 remaining) [2022-02-10 16:07:27,930 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-10 16:07:27,931 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Thread1of1ForFork1Err0INUSE_VIOLATION (0 of 4 remaining) [2022-02-10 16:07:27,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 16:07:27,937 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-02-10 16:07:27,941 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 16:07:27,941 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 16:07:27,947 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 04:07:27 BasicIcfg [2022-02-10 16:07:27,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 16:07:27,949 INFO L158 Benchmark]: Toolchain (without parser) took 422.29ms. Allocated memory is still 194.0MB. Free memory was 159.7MB in the beginning and 132.7MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-02-10 16:07:27,949 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 160.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 16:07:27,953 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.35ms. Allocated memory is still 194.0MB. Free memory was 159.5MB in the beginning and 158.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-10 16:07:27,953 INFO L158 Benchmark]: Boogie Preprocessor took 8.90ms. Allocated memory is still 194.0MB. Free memory was 158.0MB in the beginning and 157.2MB in the end (delta: 757.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 16:07:27,953 INFO L158 Benchmark]: RCFGBuilder took 127.64ms. Allocated memory is still 194.0MB. Free memory was 157.2MB in the beginning and 149.9MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-02-10 16:07:27,954 INFO L158 Benchmark]: TraceAbstraction took 262.00ms. Allocated memory is still 194.0MB. Free memory was 149.3MB in the beginning and 132.7MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-02-10 16:07:27,959 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 160.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.35ms. Allocated memory is still 194.0MB. Free memory was 159.5MB in the beginning and 158.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 8.90ms. Allocated memory is still 194.0MB. Free memory was 158.0MB in the beginning and 157.2MB in the end (delta: 757.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 127.64ms. Allocated memory is still 194.0MB. Free memory was 157.2MB in the beginning and 149.9MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 262.00ms. Allocated memory is still 194.0MB. Free memory was 149.3MB in the beginning and 132.7MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: assertion can be violated assertion can be violated We found a FailurePath: [L14] FORK 0 fork 1 thread1(); [L21] FORK 1 fork 2, 2 thread2(); [L22] JOIN 2 join 2, 2; [L16] JOIN 1 join 1; [L17] 0 assert false; - UnprovableResult [Line: 20]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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! [2022-02-10 16:07:27,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2022-02-10 16:07:28,213 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...