/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 22:34:23,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 22:34:23,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 22:34:23,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 22:34:23,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 22:34:23,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 22:34:23,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 22:34:23,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 22:34:23,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 22:34:23,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 22:34:23,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 22:34:23,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 22:34:23,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 22:34:23,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 22:34:23,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 22:34:23,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 22:34:23,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 22:34:23,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 22:34:23,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 22:34:23,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 22:34:23,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 22:34:23,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 22:34:23,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 22:34:23,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 22:34:23,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 22:34:23,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 22:34:23,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 22:34:23,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 22:34:23,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 22:34:23,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 22:34:23,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 22:34:23,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 22:34:23,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 22:34:23,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 22:34:23,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 22:34:23,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 22:34:23,738 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-PN-SemanticLbe.epf [2021-03-11 22:34:23,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 22:34:23,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 22:34:23,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 22:34:23,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 22:34:23,769 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 22:34:23,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 22:34:23,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 22:34:23,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 22:34:23,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 22:34:23,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 22:34:23,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 22:34:23,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 22:34:23,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 22:34:23,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 22:34:23,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 22:34:23,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 22:34:23,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 22:34:23,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 22:34:23,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 22:34:23,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 22:34:23,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 22:34:23,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:34:23,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 22:34:23,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 22:34:23,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 22:34:23,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 22:34:23,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 22:34:23,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 22:34:23,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 22:34:24,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 22:34:24,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 22:34:24,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 22:34:24,104 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 22:34:24,105 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 22:34:24,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl [2021-03-11 22:34:24,106 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl' [2021-03-11 22:34:24,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 22:34:24,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 22:34:24,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 22:34:24,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 22:34:24,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 22:34:24,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 22:34:24,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 22:34:24,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 22:34:24,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 22:34:24,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... [2021-03-11 22:34:24,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 22:34:24,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 22:34:24,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 22:34:24,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 22:34:24,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:34:24,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 22:34:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 22:34:24,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 22:34:24,234 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 22:34:24,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 22:34:24,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 22:34:24,234 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 22:34:24,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 22:34:24,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 22:34:24,235 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 22:34:24,326 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 22:34:24,326 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 22:34:24,329 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:34:24 BoogieIcfgContainer [2021-03-11 22:34:24,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 22:34:24,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 22:34:24,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 22:34:24,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 22:34:24,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:24" (1/2) ... [2021-03-11 22:34:24,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216117f and model type nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:34:24, skipping insertion in model container [2021-03-11 22:34:24,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:34:24" (2/2) ... [2021-03-11 22:34:24,336 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_fork.bpl [2021-03-11 22:34:24,343 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 22:34:24,346 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 22:34:24,347 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 22:34:24,410 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-03-11 22:34:24,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 22:34:24,459 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:34:24,459 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:34:24,460 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:34:24,460 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:34:24,460 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:34:24,460 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:34:24,460 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:34:24,460 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:34:24,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 13 transitions, 45 flow [2021-03-11 22:34:24,489 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-03-11 22:34:24,489 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 22:34:24,491 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. [2021-03-11 22:34:24,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 13 transitions, 45 flow [2021-03-11 22:34:24,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 8 transitions, 31 flow [2021-03-11 22:34:24,498 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:34:24,506 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 8 transitions, 31 flow [2021-03-11 22:34:24,515 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 8 transitions, 31 flow [2021-03-11 22:34:24,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 14 places, 8 transitions, 31 flow [2021-03-11 22:34:24,522 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-03-11 22:34:24,522 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 22:34:24,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 8 events. 1/8 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2021-03-11 22:34:24,524 INFO L116 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-11 22:34:24,527 INFO L131 LiptonReduction]: Checked pairs total: 0 [2021-03-11 22:34:24,527 INFO L133 LiptonReduction]: Total number of compositions: 0 [2021-03-11 22:34:24,528 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 34 [2021-03-11 22:34:24,542 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2021-03-11 22:34:24,542 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 22:34:24,542 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:24,543 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:24,543 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1046076716, now seen corresponding path program 1 times [2021-03-11 22:34:24,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:24,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557157483] [2021-03-11 22:34:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:34:24,620 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:34:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:34:24,627 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:34:24,640 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:34:24,641 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:34:24,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 22:34:24,649 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 10:34:24 BasicIcfg [2021-03-11 22:34:24,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 22:34:24,651 INFO L168 Benchmark]: Toolchain (without parser) took 513.09 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 223.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:24,652 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 157.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:34:24,653 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.80 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:24,654 INFO L168 Benchmark]: Boogie Preprocessor took 9.23 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.9 MB in the end (delta: 859.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:34:24,655 INFO L168 Benchmark]: RCFGBuilder took 150.48 ms. Allocated memory is still 255.9 MB. Free memory was 233.9 MB in the beginning and 240.4 MB in the end (delta: -6.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:24,656 INFO L168 Benchmark]: TraceAbstraction took 317.14 ms. Allocated memory is still 255.9 MB. Free memory was 240.4 MB in the beginning and 223.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:24,662 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 157.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.80 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.23 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.9 MB in the end (delta: 859.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 150.48 ms. Allocated memory is still 255.9 MB. Free memory was 233.9 MB in the beginning and 240.4 MB in the end (delta: -6.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 317.14 ms. Allocated memory is still 255.9 MB. Free memory was 240.4 MB in the beginning and 223.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12.4ms, 14 PlacesBefore, 14 PlacesAfterwards, 8 TransitionsBefore, 8 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 0 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 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: 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 - 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; - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 185.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 77.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.5ms SsaConstructionTime, 11.3ms SatisfiabilityAnalysisTime, 0.0ms 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! Received shutdown request...