/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=16.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-08 16:34:40,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-08 16:34:40,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-08 16:34:40,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-08 16:34:40,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-08 16:34:40,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-08 16:34:40,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-08 16:34:40,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-08 16:34:40,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-08 16:34:40,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-08 16:34:40,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-08 16:34:40,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-08 16:34:40,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-08 16:34:40,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-08 16:34:40,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-08 16:34:40,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-08 16:34:40,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-08 16:34:40,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-08 16:34:40,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-08 16:34:40,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-08 16:34:40,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-08 16:34:40,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-08 16:34:40,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-08 16:34:40,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-08 16:34:40,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-08 16:34:40,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-08 16:34:40,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-08 16:34:40,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-08 16:34:40,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-08 16:34:40,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-08 16:34:40,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-08 16:34:40,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-08 16:34:40,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-08 16:34:40,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-08 16:34:40,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-08 16:34:40,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-08 16:34:40,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-08 16:34:40,413 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-08 16:34:40,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-08 16:34:40,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-08 16:34:40,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-08 16:34:40,415 INFO L138 SettingsManager]: * Use SBE=true [2020-10-08 16:34:40,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-08 16:34:40,416 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-08 16:34:40,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-08 16:34:40,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-08 16:34:40,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-08 16:34:40,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-08 16:34:40,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-08 16:34:40,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-08 16:34:40,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-08 16:34:40,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-08 16:34:40,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-08 16:34:40,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-08 16:34:40,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-08 16:34:40,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-08 16:34:40,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-08 16:34:40,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-08 16:34:40,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-08 16:34:40,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-08 16:34:40,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-08 16:34:40,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-08 16:34:40,419 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-08 16:34:40,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-08 16:34:40,420 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-08 16:34:40,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-08 16:34:40,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-08 16:34:40,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-08 16:34:40,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-08 16:34:40,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-08 16:34:40,731 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-10-08 16:34:40,731 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-10-08 16:34:40,732 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=16.bpl [2020-10-08 16:34:40,732 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=16.bpl' [2020-10-08 16:34:40,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-08 16:34:40,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-08 16:34:40,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-08 16:34:40,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-08 16:34:40,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-08 16:34:40,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-08 16:34:40,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-08 16:34:40,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-08 16:34:40,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-08 16:34:40,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/1) ... [2020-10-08 16:34:40,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-08 16:34:40,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-08 16:34:40,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-08 16:34:40,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-08 16:34:40,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (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 [2020-10-08 16:34:40,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2020-10-08 16:34:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-10-08 16:34:40,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-10-08 16:34:40,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2020-10-08 16:34:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2020-10-08 16:34:40,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2020-10-08 16:34:40,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2020-10-08 16:34:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2020-10-08 16:34:40,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2020-10-08 16:34:40,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2020-10-08 16:34:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2020-10-08 16:34:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2020-10-08 16:34:40,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2020-10-08 16:34:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2020-10-08 16:34:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2020-10-08 16:34:40,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2020-10-08 16:34:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2020-10-08 16:34:40,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2020-10-08 16:34:40,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread7 given in one single declaration [2020-10-08 16:34:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2020-10-08 16:34:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2020-10-08 16:34:40,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread8 given in one single declaration [2020-10-08 16:34:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread8 [2020-10-08 16:34:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread8 [2020-10-08 16:34:40,928 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread9 given in one single declaration [2020-10-08 16:34:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread9 [2020-10-08 16:34:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread9 [2020-10-08 16:34:40,928 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread14 given in one single declaration [2020-10-08 16:34:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread14 [2020-10-08 16:34:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread14 [2020-10-08 16:34:40,929 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread13 given in one single declaration [2020-10-08 16:34:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread13 [2020-10-08 16:34:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread13 [2020-10-08 16:34:40,929 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-10-08 16:34:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-08 16:34:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-08 16:34:40,930 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread16 given in one single declaration [2020-10-08 16:34:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread16 [2020-10-08 16:34:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread16 [2020-10-08 16:34:40,930 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread15 given in one single declaration [2020-10-08 16:34:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread15 [2020-10-08 16:34:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread15 [2020-10-08 16:34:40,931 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread10 given in one single declaration [2020-10-08 16:34:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread10 [2020-10-08 16:34:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread10 [2020-10-08 16:34:40,931 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread12 given in one single declaration [2020-10-08 16:34:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread12 [2020-10-08 16:34:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread12 [2020-10-08 16:34:40,932 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread11 given in one single declaration [2020-10-08 16:34:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread11 [2020-10-08 16:34:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread11 [2020-10-08 16:34:40,934 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-08 16:34:41,311 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-08 16:34:41,311 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-08 16:34:41,313 INFO L202 PluginConnector]: Adding new model example2_N=16.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 04:34:41 BoogieIcfgContainer [2020-10-08 16:34:41,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-08 16:34:41,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-08 16:34:41,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-08 16:34:41,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-08 16:34:41,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:40" (1/2) ... [2020-10-08 16:34:41,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b71e289 and model type example2_N=16.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 04:34:41, skipping insertion in model container [2020-10-08 16:34:41,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=16.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 04:34:41" (2/2) ... [2020-10-08 16:34:41,326 INFO L111 eAbstractionObserver]: Analyzing ICFG example2_N=16.bpl [2020-10-08 16:34:41,337 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-08 16:34:41,346 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-08 16:34:41,348 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-08 16:34:41,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-10-08 16:34:41,644 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-08 16:34:41,644 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-08 16:34:41,644 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-08 16:34:41,645 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-08 16:34:41,645 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-08 16:34:41,645 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-08 16:34:41,645 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-08 16:34:41,645 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-08 16:34:41,673 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 100 transitions, 328 flow [2020-10-08 16:34:41,814 INFO L129 PetriNetUnfolder]: 16/84 cut-off events. [2020-10-08 16:34:41,815 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-08 16:34:41,824 INFO L80 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 84 events. 16/84 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2020-10-08 16:34:41,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 100 transitions, 328 flow [2020-10-08 16:34:41,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 82 transitions, 260 flow [2020-10-08 16:34:41,888 INFO L129 PetriNetUnfolder]: 16/81 cut-off events. [2020-10-08 16:34:41,889 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-08 16:34:41,889 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-08 16:34:41,890 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-08 16:34:41,891 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14INUSE_VIOLATION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr13INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr12INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr15INUSE_VIOLATION, ULTIMATE.startErr4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr11INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr10INUSE_VIOLATION]=== [2020-10-08 16:34:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-08 16:34:41,899 INFO L82 PathProgramCache]: Analyzing trace with hash 184302947, now seen corresponding path program 1 times [2020-10-08 16:34:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-08 16:34:41,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933003374] [2020-10-08 16:34:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-08 16:34:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-08 16:34:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-08 16:34:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-08 16:34:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-08 16:34:42,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-08 16:34:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-08 16:34:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933003374] [2020-10-08 16:34:42,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-08 16:34:42,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2020-10-08 16:34:42,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91535340] [2020-10-08 16:34:42,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-08 16:34:42,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-08 16:34:42,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-08 16:34:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-08 16:34:42,576 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 100 [2020-10-08 16:34:42,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 82 transitions, 260 flow. Second operand 3 states. [2020-10-08 16:34:42,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-08 16:34:42,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 100 [2020-10-08 16:34:42,581 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-08 16:34:42,646 INFO L129 PetriNetUnfolder]: 16/81 cut-off events. [2020-10-08 16:34:42,646 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-08 16:34:42,652 INFO L80 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 81 events. 16/81 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 100 event pairs, 0 based on Foata normal form. 1/66 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2020-10-08 16:34:42,654 INFO L132 encePairwiseOnDemand]: 98/100 looper letters, 0 selfloop transitions, 0 changer transitions 81/81 dead transitions. [2020-10-08 16:34:42,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 81 transitions, 260 flow [2020-10-08 16:34:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-08 16:34:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-08 16:34:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2020-10-08 16:34:42,677 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9766666666666667 [2020-10-08 16:34:42,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2020-10-08 16:34:42,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2020-10-08 16:34:42,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-08 16:34:42,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2020-10-08 16:34:42,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-08 16:34:42,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-08 16:34:42,698 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-08 16:34:42,700 INFO L185 Difference]: Start difference. First operand has 115 places, 82 transitions, 260 flow. Second operand 3 states and 293 transitions. [2020-10-08 16:34:42,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 81 transitions, 260 flow [2020-10-08 16:34:42,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 196 flow, removed 0 selfloop flow, removed 32 redundant places. [2020-10-08 16:34:42,709 INFO L241 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2020-10-08 16:34:42,712 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2020-10-08 16:34:42,713 INFO L341 CegarLoopForPetriNet]: 115 programPoint places, -31 predicate places. [2020-10-08 16:34:42,714 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2020-10-08 16:34:42,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-08 16:34:42,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-08 16:34:42,930 INFO L202 PluginConnector]: Adding new model example2_N=16.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 04:34:42 BasicIcfg [2020-10-08 16:34:42,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-08 16:34:42,932 INFO L168 Benchmark]: Toolchain (without parser) took 2155.44 ms. Allocated memory is still 248.5 MB. Free memory was 224.9 MB in the beginning and 167.7 MB in the end (delta: 57.2 MB). Peak memory consumption was 57.2 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:42,933 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 248.5 MB. Free memory is still 224.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-08 16:34:42,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.92 ms. Allocated memory is still 248.5 MB. Free memory was 224.9 MB in the beginning and 222.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:42,938 INFO L168 Benchmark]: Boogie Preprocessor took 30.13 ms. Allocated memory is still 248.5 MB. Free memory was 222.4 MB in the beginning and 219.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:42,939 INFO L168 Benchmark]: RCFGBuilder took 466.98 ms. Allocated memory is still 248.5 MB. Free memory was 219.9 MB in the beginning and 199.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:42,940 INFO L168 Benchmark]: TraceAbstraction took 1613.88 ms. Allocated memory is still 248.5 MB. Free memory was 199.7 MB in the beginning and 167.7 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:42,951 INFO L336 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 0.23 ms. Allocated memory is still 248.5 MB. Free memory is still 224.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 37.92 ms. Allocated memory is still 248.5 MB. Free memory was 224.9 MB in the beginning and 222.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 30.13 ms. Allocated memory is still 248.5 MB. Free memory was 222.4 MB in the beginning and 219.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 466.98 ms. Allocated memory is still 248.5 MB. Free memory was 219.9 MB in the beginning and 199.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1613.88 ms. Allocated memory is still 248.5 MB. Free memory was 199.7 MB in the beginning and 167.7 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 17 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 35 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 65 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=260occurred in iteration=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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 14406 SizeOfPredicates, 0 NumberOfNonLiveVariables, 565 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...