/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-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 08:22:35,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 08:22:35,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 08:22:35,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-13 08:22:35,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-13 08:22:35,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-13 08:22:35,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-13 08:22:35,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-13 08:22:35,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-13 08:22:35,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-13 08:22:35,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-13 08:22:35,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-13 08:22:35,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-13 08:22:35,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-13 08:22:35,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-13 08:22:35,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-13 08:22:35,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-13 08:22:35,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-13 08:22:35,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-13 08:22:35,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-13 08:22:35,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-13 08:22:35,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-13 08:22:35,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-13 08:22:35,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-13 08:22:35,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-13 08:22:35,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-13 08:22:35,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-13 08:22:35,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-13 08:22:35,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-13 08:22:35,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-13 08:22:35,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-13 08:22:35,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-13 08:22:35,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-13 08:22:35,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-13 08:22:35,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-13 08:22:35,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-13 08:22:35,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-13 08:22:35,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-13 08:22:35,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 08:22:35,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 08:22:35,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 08:22:35,127 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-NoLbe.epf [2021-06-13 08:22:35,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 08:22:35,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 08:22:35,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 08:22:35,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 08:22:35,149 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 08:22:35,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 08:22:35,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 08:22:35,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 08:22:35,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 08:22:35,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 08:22:35,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 08:22:35,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 08:22:35,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 08:22:35,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 08:22:35,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 08:22:35,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 08:22:35,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 08:22:35,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 08:22:35,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 08:22:35,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 08:22:35,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 08:22:35,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:22:35,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 08:22:35,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 08:22:35,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 08:22:35,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 08:22:35,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 08:22:35,153 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 08:22:35,153 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 08:22:35,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 08:22:35,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 08:22:35,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 08:22:35,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 08:22:35,386 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 08:22:35,386 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 08:22:35,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl [2021-06-13 08:22:35,387 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/nested_fork.bpl' [2021-06-13 08:22:35,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 08:22:35,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 08:22:35,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 08:22:35,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 08:22:35,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 08:22:35,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 08:22:35,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 08:22:35,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 08:22:35,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 08:22:35,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/1) ... [2021-06-13 08:22:35,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 08:22:35,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 08:22:35,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 08:22:35,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 08:22:35,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (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 [2021-06-13 08:22:35,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-13 08:22:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-13 08:22:35,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-13 08:22:35,491 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-13 08:22:35,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-13 08:22:35,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-13 08:22:35,491 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 08:22:35,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 08:22:35,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 08:22:35,492 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 08:22:35,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 08:22:35,575 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 08:22:35,576 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:22:35 BoogieIcfgContainer [2021-06-13 08:22:35,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 08:22:35,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 08:22:35,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 08:22:35,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 08:22:35,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:22:35" (1/2) ... [2021-06-13 08:22:35,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ff12e0 and model type nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:22:35, skipping insertion in model container [2021-06-13 08:22:35,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:22:35" (2/2) ... [2021-06-13 08:22:35,582 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_fork.bpl [2021-06-13 08:22:35,588 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 08:22:35,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 08:22:35,589 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 08:22:35,639 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-13 08:22:35,656 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-13 08:22:35,676 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:22:35,676 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:22:35,676 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:22:35,677 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:22:35,677 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:22:35,677 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:22:35,677 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:22:35,677 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1======== [2021-06-13 08:22:35,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 13 transitions, 45 flow [2021-06-13 08:22:35,691 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-06-13 08:22:35,692 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 08:22:35,693 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. [2021-06-13 08:22:35,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 13 transitions, 45 flow [2021-06-13 08:22:35,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-13 08:22:35,695 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-13 08:22:35,695 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:22:35,696 INFO L301 ceAbstractionStarter]: Result for error location thread1 was SAFE (1/3) [2021-06-13 08:22:35,697 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-13 08:22:35,699 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:22:35,699 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:22:35,699 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:22:35,699 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:22:35,699 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:22:35,700 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:22:35,700 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:22:35,700 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork1======== [2021-06-13 08:22:35,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 13 transitions, 45 flow [2021-06-13 08:22:35,702 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-06-13 08:22:35,702 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 08:22:35,703 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. [2021-06-13 08:22:35,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 13 transitions, 45 flow [2021-06-13 08:22:35,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions, 0 flow [2021-06-13 08:22:35,703 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-06-13 08:22:35,703 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-13 08:22:35,703 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork1 was SAFE (2/3) [2021-06-13 08:22:35,703 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-13 08:22:35,705 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:22:35,706 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:22:35,706 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:22:35,706 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:22:35,706 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:22:35,706 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:22:35,706 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:22:35,706 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 08:22:35,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 13 transitions, 45 flow [2021-06-13 08:22:35,710 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-06-13 08:22:35,710 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 08:22:35,710 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. [2021-06-13 08:22:35,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 13 transitions, 45 flow [2021-06-13 08:22:35,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 8 transitions, 31 flow [2021-06-13 08:22:35,713 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2021-06-13 08:22:35,714 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 08:22:35,714 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:22:35,714 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:22:35,714 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:22:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:22:35,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1046076716, now seen corresponding path program 1 times [2021-06-13 08:22:35,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:22:35,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745913384] [2021-06-13 08:22:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:22:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-13 08:22:35,765 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-13 08:22:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-13 08:22:35,768 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-13 08:22:35,778 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-13 08:22:35,778 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-13 08:22:35,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 08:22:35,779 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (3/3) [2021-06-13 08:22:35,780 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 08:22:35,784 INFO L202 PluginConnector]: Adding new model nested_fork.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 08:22:35 BasicIcfg [2021-06-13 08:22:35,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 08:22:35,786 INFO L168 Benchmark]: Toolchain (without parser) took 376.95 ms. Allocated memory is still 185.6 MB. Free memory was 165.5 MB in the beginning and 137.8 MB in the end (delta: 27.7 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2021-06-13 08:22:35,786 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 185.6 MB. Free memory was 166.4 MB in the beginning and 166.3 MB in the end (delta: 75.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:22:35,786 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.23 ms. Allocated memory is still 185.6 MB. Free memory was 165.4 MB in the beginning and 163.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-13 08:22:35,787 INFO L168 Benchmark]: Boogie Preprocessor took 8.98 ms. Allocated memory is still 185.6 MB. Free memory was 163.9 MB in the beginning and 163.2 MB in the end (delta: 797.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:22:35,787 INFO L168 Benchmark]: RCFGBuilder took 140.15 ms. Allocated memory is still 185.6 MB. Free memory was 163.1 MB in the beginning and 155.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2021-06-13 08:22:35,788 INFO L168 Benchmark]: TraceAbstraction took 206.34 ms. Allocated memory is still 185.6 MB. Free memory was 154.9 MB in the beginning and 137.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-06-13 08:22:35,789 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 0.08 ms. Allocated memory is still 185.6 MB. Free memory was 166.4 MB in the beginning and 166.3 MB in the end (delta: 75.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.23 ms. Allocated memory is still 185.6 MB. Free memory was 165.4 MB in the beginning and 163.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 8.98 ms. Allocated memory is still 185.6 MB. Free memory was 163.9 MB in the beginning and 163.2 MB in the end (delta: 797.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 140.15 ms. Allocated memory is still 185.6 MB. Free memory was 163.1 MB in the beginning and 155.3 MB in the end (delta: 7.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 206.34 ms. Allocated memory is still 185.6 MB. Free memory was 154.9 MB in the beginning and 137.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 for errors in thread instance: thread1 with 1 thread instances CFG has 5 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 22.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 73.5ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, 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: 2.2ms SsaConstructionTime, 8.1ms 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...