/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.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-c7b2d19 [2022-03-15 20:35:05,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:35:05,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:35:05,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 20:35:05,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 20:35:05,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 20:35:05,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 20:35:05,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 20:35:05,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 20:35:05,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 20:35:05,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 20:35:05,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 20:35:05,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 20:35:05,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 20:35:05,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 20:35:05,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 20:35:05,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 20:35:05,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 20:35:05,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 20:35:05,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 20:35:05,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 20:35:05,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 20:35:05,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 20:35:05,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 20:35:05,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-15 20:35:05,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-15 20:35:05,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-15 20:35:05,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-15 20:35:05,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-15 20:35:05,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-15 20:35:05,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-15 20:35:05,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-15 20:35:05,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-15 20:35:05,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-15 20:35:05,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-15 20:35:05,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-15 20:35:05,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-15 20:35:05,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-15 20:35:05,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:35:05,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:35:05,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:35:05,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 20:35:05,970 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:35:05,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:35:05,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:35:05,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:35:05,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:35:05,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:35:05,973 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:35:05,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:35:05,973 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:35:05,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:35:05,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:35:05,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:35:05,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:35:05,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:35:05,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:35:05,974 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:35:05,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:35:05,975 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:35:05,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:35:05,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:35:05,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:35:05,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:35:05,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:35:05,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:35:05,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:35:05,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:35:05,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:35:05,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:35:05,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:35:05,976 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:35:05,977 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:35:05,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:35:05,977 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:35:06,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:35:06,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:35:06,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:35:06,204 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 20:35:06,207 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 20:35:06,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl [2022-03-15 20:35:06,208 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl' [2022-03-15 20:35:06,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:35:06,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 20:35:06,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:35:06,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:35:06,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:35:06,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,253 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 20:35:06,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:35:06,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:35:06,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:35:06,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:35:06,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:35:06,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:35:06,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:35:06,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:35:06,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/1) ... [2022-03-15 20:35:06,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:35:06,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:35:06,313 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) [2022-03-15 20:35:06,335 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 [2022-03-15 20:35:06,351 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 20:35:06,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 20:35:06,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 20:35:06,352 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 20:35:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 20:35:06,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 20:35:06,352 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 20:35:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:35:06,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:35:06,353 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 20:35:06,378 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:35:06,380 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:35:06,438 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:35:06,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:35:06,445 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 20:35:06,446 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:35:06 BoogieIcfgContainer [2022-03-15 20:35:06,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:35:06,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:35:06,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:35:06,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:35:06,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:35:06" (1/2) ... [2022-03-15 20:35:06,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d0a25c and model type nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:35:06, skipping insertion in model container [2022-03-15 20:35:06,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:35:06" (2/2) ... [2022-03-15 20:35:06,456 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_fork.bpl [2022-03-15 20:35:06,463 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:35:06,463 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:35:06,464 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:35:06,464 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:35:06,509 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-03-15 20:35:06,562 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:35:06,572 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 20:35:06,572 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 20:35:06,581 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:35:06,590 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 13 transitions, 45 flow [2022-03-15 20:35:06,593 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 13 transitions, 45 flow [2022-03-15 20:35:06,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 13 transitions, 45 flow [2022-03-15 20:35:06,612 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2022-03-15 20:35:06,612 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 20:35:06,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 10 events. 1/10 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2022-03-15 20:35:06,615 INFO L116 LiptonReduction]: Number of co-enabled transitions 0 [2022-03-15 20:35:06,644 INFO L131 LiptonReduction]: Checked pairs total: 0 [2022-03-15 20:35:06,645 INFO L133 LiptonReduction]: Total number of compositions: 1 [2022-03-15 20:35:06,654 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 12 transitions, 43 flow [2022-03-15 20:35:06,661 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2022-03-15 20:35:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2022-03-15 20:35:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-03-15 20:35:06,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:35:06,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:35:06,676 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, thread1Thread1of1ForFork1Err0INUSE_VIOLATION] === [2022-03-15 20:35:06,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:35:06,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1046046927, now seen corresponding path program 1 times [2022-03-15 20:35:06,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:35:06,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972650405] [2022-03-15 20:35:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:35:06,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:35:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:35:06,760 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-15 20:35:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:35:06,775 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-15 20:35:06,776 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-15 20:35:06,777 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 20:35:06,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err2INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 20:35:06,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 20:35:06,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Thread1of1ForFork1Err0INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 20:35:06,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:35:06,781 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-03-15 20:35:06,785 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 20:35:06,785 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 20:35:06,790 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 08:35:06 BasicIcfg [2022-03-15 20:35:06,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 20:35:06,791 INFO L158 Benchmark]: Toolchain (without parser) took 559.60ms. Allocated memory was 180.4MB in the beginning and 269.5MB in the end (delta: 89.1MB). Free memory was 139.9MB in the beginning and 240.5MB in the end (delta: -100.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:35:06,792 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 180.4MB. Free memory is still 140.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:35:06,792 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.31ms. Allocated memory is still 180.4MB. Free memory was 139.8MB in the beginning and 138.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:35:06,793 INFO L158 Benchmark]: Boogie Preprocessor took 13.16ms. Allocated memory is still 180.4MB. Free memory was 138.3MB in the beginning and 137.5MB in the end (delta: 868.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:35:06,793 INFO L158 Benchmark]: RCFGBuilder took 176.56ms. Allocated memory is still 180.4MB. Free memory was 137.5MB in the beginning and 130.2MB in the end (delta: 7.2MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-15 20:35:06,794 INFO L158 Benchmark]: TraceAbstraction took 341.25ms. Allocated memory was 180.4MB in the beginning and 269.5MB in the end (delta: 89.1MB). Free memory was 129.7MB in the beginning and 240.5MB in the end (delta: -110.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:35:06,796 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 180.4MB. Free memory is still 140.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.31ms. Allocated memory is still 180.4MB. Free memory was 139.8MB in the beginning and 138.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.16ms. Allocated memory is still 180.4MB. Free memory was 138.3MB in the beginning and 137.5MB in the end (delta: 868.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 176.56ms. Allocated memory is still 180.4MB. Free memory was 137.5MB in the beginning and 130.2MB in the end (delta: 7.2MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 341.25ms. Allocated memory was 180.4MB in the beginning and 269.5MB in the end (delta: 89.1MB). Free memory was 129.7MB in the beginning and 240.5MB in the end (delta: -110.7MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 20 PlacesBefore, 19 PlacesAfterwards, 13 TransitionsBefore, 12 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: 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: 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] , 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 - 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: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred 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! [2022-03-15 20:35:06,823 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...