/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/fork_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-04 10:32:06,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-04 10:32:06,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-04 10:32:06,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-04 10:32:06,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-04 10:32:06,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-04 10:32:06,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-04 10:32:06,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-04 10:32:06,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-04 10:32:06,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-04 10:32:06,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-04 10:32:06,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-04 10:32:06,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-04 10:32:06,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-04 10:32:06,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-04 10:32:06,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-04 10:32:06,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-04 10:32:06,537 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 [2022-03-04 10:32:06,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-04 10:32:06,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-04 10:32:06,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-04 10:32:06,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-04 10:32:06,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-04 10:32:06,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-04 10:32:06,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-04 10:32:06,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-04 10:32:06,564 INFO L138 SettingsManager]: * Use SBE=true [2022-03-04 10:32:06,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-04 10:32:06,565 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-04 10:32:06,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-04 10:32:06,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-04 10:32:06,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-04 10:32:06,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-04 10:32:06,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-04 10:32:06,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-04 10:32:06,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-04 10:32:06,566 INFO L138 SettingsManager]: * Construct finite automaton lazily=true [2022-03-04 10:32:06,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-04 10:32:06,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-04 10:32:06,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-04 10:32:06,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-04 10:32:06,567 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-04 10:32:06,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-03-04 10:32:06,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-04 10:32:06,567 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITHOUT_DEPRANKS [2022-03-04 10:32:06,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-04 10:32:06,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-04 10:32:06,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-04 10:32:06,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-04 10:32:06,866 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-04 10:32:06,867 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-04 10:32:06,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2022-03-04 10:32:06,868 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2022-03-04 10:32:06,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-04 10:32:06,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-04 10:32:06,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-04 10:32:06,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-04 10:32:06,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-04 10:32:06,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,905 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-04 10:32:06,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-04 10:32:06,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-04 10:32:06,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-04 10:32:06,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-04 10:32:06,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-04 10:32:06,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-04 10:32:06,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-04 10:32:06,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-04 10:32:06,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/1) ... [2022-03-04 10:32:06,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-04 10:32:06,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-04 10:32:06,961 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) [2022-03-04 10:32:07,012 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 [2022-03-04 10:32:07,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2022-03-04 10:32:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-04 10:32:07,026 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-04 10:32:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-04 10:32:07,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-04 10:32:07,027 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-04 10:32:07,062 INFO L234 CfgBuilder]: Building ICFG [2022-03-04 10:32:07,063 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-04 10:32:07,143 INFO L275 CfgBuilder]: Performing block encoding [2022-03-04 10:32:07,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-04 10:32:07,150 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-04 10:32:07,152 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.03 10:32:07 BoogieIcfgContainer [2022-03-04 10:32:07,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-04 10:32:07,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-04 10:32:07,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-04 10:32:07,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-04 10:32:07,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 10:32:06" (1/2) ... [2022-03-04 10:32:07,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182a774a and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:32:07, skipping insertion in model container [2022-03-04 10:32:07,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.03 10:32:07" (2/2) ... [2022-03-04 10:32:07,161 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2022-03-04 10:32:07,170 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-04 10:32:07,170 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-04 10:32:07,170 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-04 10:32:07,170 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-04 10:32:07,191 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-04 10:32:07,191 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-04 10:32:07,192 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-04 10:32:07,192 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-04 10:32:07,202 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-04 10:32:07,202 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-04 10:32:07,204 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-03-04 10:32:07,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-03-04 10:32:07,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-04 10:32:07,232 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) [2022-03-04 10:32:07,234 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 [2022-03-04 10:32:07,253 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-04 10:32:07,258 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 [2022-03-04 10:32:07,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-03-04 10:32:07,284 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 13 transitions and produced 14 states. [2022-03-04 10:32:07,286 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-03-04 10:32:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-04 10:32:07,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1810014354, now seen corresponding path program 1 times [2022-03-04 10:32:07,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-04 10:32:07,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182238808] [2022-03-04 10:32:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-04 10:32:07,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-04 10:32:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-04 10:32:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-04 10:32:07,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-04 10:32:07,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182238808] [2022-03-04 10:32:07,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182238808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-04 10:32:07,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-04 10:32:07,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-04 10:32:07,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095756752] [2022-03-04 10:32:07,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-04 10:32:07,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-04 10:32:07,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-04 10:32:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-04 10:32:07,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-04 10:32:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-04 10:32:07,429 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-03-04 10:32:07,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-04 10:32:07,430 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-03-04 10:32:07,510 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 23 transitions and produced 24 states. [2022-03-04 10:32:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-04 10:32:07,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-04 10:32:07,511 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-03-04 10:32:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-04 10:32:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2012947041, now seen corresponding path program 1 times [2022-03-04 10:32:07,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-04 10:32:07,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93918128] [2022-03-04 10:32:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-04 10:32:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-04 10:32:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-04 10:32:07,521 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-04 10:32:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-04 10:32:07,539 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-04 10:32:07,539 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-04 10:32:07,541 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (1 of 2 remaining) [2022-03-04 10:32:07,542 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2022-03-04 10:32:07,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-04 10:32:07,550 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-03-04 10:32:07,563 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-04 10:32:07,563 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-04 10:32:07,589 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.03 10:32:07 BasicIcfg [2022-03-04 10:32:07,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-04 10:32:07,592 INFO L158 Benchmark]: Toolchain (without parser) took 702.47ms. Allocated memory was 199.2MB in the beginning and 269.5MB in the end (delta: 70.3MB). Free memory was 165.1MB in the beginning and 249.0MB in the end (delta: -83.9MB). Peak memory consumption was 170.8kB. Max. memory is 8.0GB. [2022-03-04 10:32:07,592 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 199.2MB. Free memory is still 166.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-04 10:32:07,593 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.96ms. Allocated memory is still 199.2MB. Free memory was 165.1MB in the beginning and 163.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-04 10:32:07,594 INFO L158 Benchmark]: Boogie Preprocessor took 11.57ms. Allocated memory is still 199.2MB. Free memory was 163.6MB in the beginning and 162.7MB in the end (delta: 899.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-04 10:32:07,595 INFO L158 Benchmark]: RCFGBuilder took 233.23ms. Allocated memory is still 199.2MB. Free memory was 162.6MB in the beginning and 154.6MB in the end (delta: 7.9MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-04 10:32:07,597 INFO L158 Benchmark]: TraceAbstraction took 433.63ms. Allocated memory was 199.2MB in the beginning and 269.5MB in the end (delta: 70.3MB). Free memory was 154.0MB in the beginning and 249.0MB in the end (delta: -95.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-04 10:32:07,599 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 0.12ms. Allocated memory is still 199.2MB. Free memory is still 166.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.96ms. Allocated memory is still 199.2MB. Free memory was 165.1MB in the beginning and 163.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.57ms. Allocated memory is still 199.2MB. Free memory was 163.6MB in the beginning and 162.7MB in the end (delta: 899.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 233.23ms. Allocated memory is still 199.2MB. Free memory was 162.6MB in the beginning and 154.6MB in the end (delta: 7.9MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 433.63ms. Allocated memory was 199.2MB in the beginning and 269.5MB in the end (delta: 70.3MB). Free memory was 154.0MB in the beginning and 249.0MB in the end (delta: -95.0MB). 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: 25]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 res := 0; VAL [res=0] [L18] 0 x := 0; VAL [res=0, x=0] [L20] COND TRUE 0 x < 3 VAL [res=0, x=0] [L21] FORK 0 fork x foo(); VAL [res=0, x=0] [L22] 0 resOld := res; VAL [res=0, resOld=0, x=0] [L35] 1 res := y; VAL [res=2, res=0, resOld=0, x=0, y=2] [L23] JOIN 1 join x assign res; VAL [res=2, res=2, resOld=0, x=0, y=2] [L24] COND FALSE 0 !(x > 0) VAL [res=2, res=2, resOld=0, x=0, y=2] [L27] 0 x := x + 1; VAL [res=2, res=2, resOld=0, x=1, y=2] [L20] COND TRUE 0 x < 3 VAL [res=2, res=2, resOld=0, x=1, y=2] [L21] FORK 0 fork x foo(); VAL [res=2, resOld=0, x=1] [L22] 0 resOld := res; VAL [res=2, resOld=2, x=1] [L35] 1 res := y; VAL [res=2, res=3, resOld=2, x=1, y=3] [L23] JOIN 1 join x assign res; VAL [res=3, res=3, resOld=2, x=1, y=3] [L24] COND TRUE 0 x > 0 VAL [res=3, res=3, resOld=2, x=1, y=3] [L25] 0 assert resOld == res; VAL [res=3, res=3, resOld=2, x=1, y=3] - UnprovableResult [Line: 21]: 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 3 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 23 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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! [2022-03-04 10:32:07,638 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 [2022-03-04 10:32:07,850 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...