/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-MCRwithDepranks-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-820ea7a [2022-02-20 03:07:45,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 03:07:45,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 03:07:45,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 03:07:45,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 03:07:45,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 03:07:45,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 03:07:45,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 03:07:45,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 03:07:45,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 03:07:45,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 03:07:45,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 03:07:45,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 03:07:45,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 03:07:45,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 03:07:45,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 03:07:45,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 03:07:45,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 03:07:45,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 03:07:45,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 03:07:45,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 03:07:45,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 03:07:45,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 03:07:45,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 03:07:45,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 03:07:45,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 03:07:45,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 03:07:45,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 03:07:45,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 03:07:45,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 03:07:45,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 03:07:45,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 03:07:45,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 03:07:45,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 03:07:45,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 03:07:45,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 03:07:45,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 03:07:45,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 03:07:45,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 03:07:45,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 03:07:45,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 03:07:45,664 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-MCRwithDepranks-Lazy.epf [2022-02-20 03:07:45,689 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 03:07:45,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 03:07:45,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 03:07:45,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 03:07:45,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 03:07:45,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 03:07:45,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 03:07:45,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 03:07:45,691 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 03:07:45,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 03:07:45,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 03:07:45,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 03:07:45,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 03:07:45,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 03:07:45,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 03:07:45,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 03:07:45,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 03:07:45,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 03:07:45,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 03:07:45,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 03:07:45,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 03:07:45,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 03:07:45,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 03:07:45,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-20 03:07:45,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 03:07:45,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 03:07:45,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 03:07:45,694 INFO L138 SettingsManager]: * Construct finite automaton lazily=true [2022-02-20 03:07:45,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 03:07:45,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 03:07:45,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 03:07:45,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 03:07:45,695 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 03:07:45,695 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-02-20 03:07:45,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 03:07:45,696 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-20 03:07:45,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-20 03:07:45,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 03:07:45,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 03:07:45,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 03:07:45,941 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-20 03:07:45,942 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-20 03:07:45,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl [2022-02-20 03:07:45,943 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl' [2022-02-20 03:07:45,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 03:07:45,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-20 03:07:45,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 03:07:45,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 03:07:45,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 03:07:45,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,983 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-20 03:07:45,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 03:07:45,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 03:07:45,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 03:07:45,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 03:07:45,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:45,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 03:07:45,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 03:07:45,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 03:07:45,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 03:07:45,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/1) ... [2022-02-20 03:07:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 03:07:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 03:07:46,023 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) [2022-02-20 03:07:46,024 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 [2022-02-20 03:07:46,054 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-20 03:07:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-20 03:07:46,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-20 03:07:46,054 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-20 03:07:46,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-20 03:07:46,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-20 03:07:46,055 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-20 03:07:46,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 03:07:46,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 03:07:46,055 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-20 03:07:46,075 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 03:07:46,077 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 03:07:46,129 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 03:07:46,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 03:07:46,134 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-20 03:07:46,136 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 03:07:46 BoogieIcfgContainer [2022-02-20 03:07:46,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 03:07:46,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 03:07:46,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 03:07:46,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 03:07:46,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.02 03:07:45" (1/2) ... [2022-02-20 03:07:46,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69dc7af6 and model type nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 03:07:46, skipping insertion in model container [2022-02-20 03:07:46,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 03:07:46" (2/2) ... [2022-02-20 03:07:46,142 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_fork.bpl [2022-02-20 03:07:46,146 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-20 03:07:46,147 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 03:07:46,147 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-20 03:07:46,147 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-20 03:07:46,175 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-02-20 03:07:46,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-02-20 03:07:46,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 03:07:46,219 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) [2022-02-20 03:07:46,253 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 [2022-02-20 03:07:46,283 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 03:07:46,295 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-02-20 03:07:46,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-20 03:07:46,347 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 8 transitions and produced 9 states. [2022-02-20 03:07:46,355 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, thread1Thread1of1ForFork1Err0INUSE_VIOLATION] === [2022-02-20 03:07:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 03:07:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1046076718, now seen corresponding path program 1 times [2022-02-20 03:07:46,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 03:07:46,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949663758] [2022-02-20 03:07:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 03:07:46,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 03:07:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 03:07:46,465 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-20 03:07:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 03:07:46,493 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-20 03:07:46,494 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-20 03:07:46,496 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-20 03:07:46,498 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2INUSE_VIOLATION (2 of 4 remaining) [2022-02-20 03:07:46,498 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-20 03:07:46,499 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Thread1of1ForFork1Err0INUSE_VIOLATION (0 of 4 remaining) [2022-02-20 03:07:46,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-20 03:07:46,507 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-02-20 03:07:46,512 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-20 03:07:46,512 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-20 03:07:46,519 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.02 03:07:46 BasicIcfg [2022-02-20 03:07:46,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-20 03:07:46,522 INFO L158 Benchmark]: Toolchain (without parser) took 554.84ms. Allocated memory is still 178.3MB. Free memory was 136.6MB in the beginning and 143.7MB in the end (delta: -7.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-20 03:07:46,522 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 178.3MB. Free memory is still 137.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-20 03:07:46,526 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.86ms. Allocated memory is still 178.3MB. Free memory was 136.6MB in the beginning and 135.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-20 03:07:46,527 INFO L158 Benchmark]: Boogie Preprocessor took 9.34ms. Allocated memory is still 178.3MB. Free memory was 135.1MB in the beginning and 134.3MB in the end (delta: 779.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-20 03:07:46,527 INFO L158 Benchmark]: RCFGBuilder took 141.44ms. Allocated memory is still 178.3MB. Free memory was 134.2MB in the beginning and 126.4MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-20 03:07:46,528 INFO L158 Benchmark]: TraceAbstraction took 382.37ms. Allocated memory is still 178.3MB. Free memory was 125.9MB in the beginning and 143.7MB in the end (delta: -17.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-20 03:07:46,532 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 0.13ms. Allocated memory is still 178.3MB. Free memory is still 137.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.86ms. Allocated memory is still 178.3MB. Free memory was 136.6MB in the beginning and 135.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.34ms. Allocated memory is still 178.3MB. Free memory was 135.1MB in the beginning and 134.3MB in the end (delta: 779.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 141.44ms. Allocated memory is still 178.3MB. Free memory was 134.2MB in the beginning and 126.4MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 382.37ms. Allocated memory is still 178.3MB. Free memory was 125.9MB in the beginning and 143.7MB in the end (delta: -17.8MB). There was no memory consumed. 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: 0.3s, 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! [2022-02-20 03:07:46,579 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 [2022-02-20 03:07:46,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...