/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=12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-08 16:34:36,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-08 16:34:36,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-08 16:34:36,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-08 16:34:36,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-08 16:34:36,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-08 16:34:36,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-08 16:34:36,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-08 16:34:36,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-08 16:34:36,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-08 16:34:36,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-08 16:34:36,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-08 16:34:36,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-08 16:34:36,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-08 16:34:36,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-08 16:34:36,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-08 16:34:36,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-08 16:34:36,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-08 16:34:36,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-08 16:34:36,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-08 16:34:36,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-08 16:34:36,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-08 16:34:36,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-08 16:34:36,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-08 16:34:36,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-08 16:34:36,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-08 16:34:36,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-08 16:34:36,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-08 16:34:36,472 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 16:34:36,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-08 16:34:36,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-08 16:34:36,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-08 16:34:36,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-08 16:34:36,516 INFO L138 SettingsManager]: * Use SBE=true [2020-10-08 16:34:36,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-08 16:34:36,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-08 16:34:36,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-08 16:34:36,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-08 16:34:36,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-08 16:34:36,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-08 16:34:36,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-08 16:34:36,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-08 16:34:36,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-08 16:34:36,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-08 16:34:36,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-08 16:34:36,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-08 16:34:36,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-08 16:34:36,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-08 16:34:36,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-08 16:34:36,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-08 16:34:36,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-08 16:34:36,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-08 16:34:36,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-08 16:34:36,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-08 16:34:36,521 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-08 16:34:36,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-08 16:34:36,521 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-08 16:34:36,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-08 16:34:36,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-08 16:34:36,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-08 16:34:36,862 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-08 16:34:36,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-08 16:34:36,866 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-10-08 16:34:36,867 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-10-08 16:34:36,870 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=12.bpl [2020-10-08 16:34:36,871 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/VMCAI2021/generated/example2_N=12.bpl' [2020-10-08 16:34:36,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-08 16:34:36,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-08 16:34:36,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-08 16:34:36,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-08 16:34:36,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-08 16:34:36,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-08 16:34:36,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-08 16:34:36,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-08 16:34:36,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-08 16:34:36,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/1) ... [2020-10-08 16:34:36,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-08 16:34:36,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-08 16:34:36,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-08 16:34:36,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-08 16:34:36,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (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 16:34:37,067 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2020-10-08 16:34:37,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2020-10-08 16:34:37,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2020-10-08 16:34:37,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2020-10-08 16:34:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2020-10-08 16:34:37,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2020-10-08 16:34:37,069 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2020-10-08 16:34:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2020-10-08 16:34:37,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2020-10-08 16:34:37,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2020-10-08 16:34:37,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2020-10-08 16:34:37,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2020-10-08 16:34:37,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2020-10-08 16:34:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2020-10-08 16:34:37,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2020-10-08 16:34:37,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2020-10-08 16:34:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2020-10-08 16:34:37,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2020-10-08 16:34:37,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread7 given in one single declaration [2020-10-08 16:34:37,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2020-10-08 16:34:37,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2020-10-08 16:34:37,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread8 given in one single declaration [2020-10-08 16:34:37,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread8 [2020-10-08 16:34:37,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread8 [2020-10-08 16:34:37,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread9 given in one single declaration [2020-10-08 16:34:37,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread9 [2020-10-08 16:34:37,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread9 [2020-10-08 16:34:37,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-10-08 16:34:37,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-08 16:34:37,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-08 16:34:37,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread10 given in one single declaration [2020-10-08 16:34:37,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread10 [2020-10-08 16:34:37,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread10 [2020-10-08 16:34:37,075 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread12 given in one single declaration [2020-10-08 16:34:37,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread12 [2020-10-08 16:34:37,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread12 [2020-10-08 16:34:37,076 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread11 given in one single declaration [2020-10-08 16:34:37,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread11 [2020-10-08 16:34:37,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread11 [2020-10-08 16:34:37,077 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 16:34:37,513 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-08 16:34:37,514 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-08 16:34:37,516 INFO L202 PluginConnector]: Adding new model example2_N=12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 04:34:37 BoogieIcfgContainer [2020-10-08 16:34:37,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-08 16:34:37,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-08 16:34:37,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-08 16:34:37,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-08 16:34:37,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.10 04:34:36" (1/2) ... [2020-10-08 16:34:37,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13248037 and model type example2_N=12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 04:34:37, skipping insertion in model container [2020-10-08 16:34:37,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example2_N=12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 04:34:37" (2/2) ... [2020-10-08 16:34:37,532 INFO L111 eAbstractionObserver]: Analyzing ICFG example2_N=12.bpl [2020-10-08 16:34:37,544 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-08 16:34:37,554 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-08 16:34:37,555 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-08 16:34:37,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-10-08 16:34:37,802 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-08 16:34:37,802 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-08 16:34:37,802 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-08 16:34:37,802 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-08 16:34:37,802 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-08 16:34:37,802 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-08 16:34:37,803 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-08 16:34:37,803 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-08 16:34:37,824 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 76 transitions, 248 flow [2020-10-08 16:34:37,895 INFO L129 PetriNetUnfolder]: 12/64 cut-off events. [2020-10-08 16:34:37,896 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-10-08 16:34:37,905 INFO L80 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 64 events. 12/64 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2020-10-08 16:34:37,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 76 transitions, 248 flow [2020-10-08 16:34:37,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 62 transitions, 196 flow [2020-10-08 16:34:37,945 INFO L129 PetriNetUnfolder]: 12/61 cut-off events. [2020-10-08 16:34:37,945 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-10-08 16:34:37,946 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-08 16:34:37,947 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] [2020-10-08 16:34:37,947 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, 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 16:34:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-08 16:34:37,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1244660893, now seen corresponding path program 1 times [2020-10-08 16:34:37,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-08 16:34:37,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341014661] [2020-10-08 16:34:37,969 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 16:34:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-08 16:34:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-08 16:34:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-08 16:34:38,201 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 16:34:38,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-08 16:34:38,227 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 16:34:38,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341014661] [2020-10-08 16:34:38,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-08 16:34:38,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2020-10-08 16:34:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101986376] [2020-10-08 16:34:38,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-08 16:34:38,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-08 16:34:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-08 16:34:38,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-08 16:34:38,506 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 76 [2020-10-08 16:34:38,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 196 flow. Second operand 3 states. [2020-10-08 16:34:38,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-08 16:34:38,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 76 [2020-10-08 16:34:38,524 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-08 16:34:38,562 INFO L129 PetriNetUnfolder]: 12/61 cut-off events. [2020-10-08 16:34:38,562 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-10-08 16:34:38,564 INFO L80 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 61 events. 12/61 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 1/50 useless extension candidates. Maximal degree in co-relation 96. Up to 2 conditions per place. [2020-10-08 16:34:38,570 INFO L132 encePairwiseOnDemand]: 74/76 looper letters, 0 selfloop transitions, 0 changer transitions 61/61 dead transitions. [2020-10-08 16:34:38,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 61 transitions, 196 flow [2020-10-08 16:34:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-08 16:34:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-08 16:34:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2020-10-08 16:34:38,587 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9692982456140351 [2020-10-08 16:34:38,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2020-10-08 16:34:38,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2020-10-08 16:34:38,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-08 16:34:38,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2020-10-08 16:34:38,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-08 16:34:38,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-08 16:34:38,611 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-08 16:34:38,613 INFO L185 Difference]: Start difference. First operand has 87 places, 62 transitions, 196 flow. Second operand 3 states and 221 transitions. [2020-10-08 16:34:38,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 61 transitions, 196 flow [2020-10-08 16:34:38,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 148 flow, removed 0 selfloop flow, removed 24 redundant places. [2020-10-08 16:34:38,620 INFO L241 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2020-10-08 16:34:38,623 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2020-10-08 16:34:38,623 INFO L341 CegarLoopForPetriNet]: 87 programPoint places, -23 predicate places. [2020-10-08 16:34:38,623 INFO L481 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2020-10-08 16:34:38,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-08 16:34:38,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-08 16:34:38,832 INFO L202 PluginConnector]: Adding new model example2_N=12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 04:34:38 BasicIcfg [2020-10-08 16:34:38,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-08 16:34:38,835 INFO L168 Benchmark]: Toolchain (without parser) took 1921.65 ms. Allocated memory is still 252.7 MB. Free memory was 229.1 MB in the beginning and 216.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 124.9 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:38,836 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.52 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-08 16:34:38,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.83 ms. Allocated memory is still 252.7 MB. Free memory was 229.1 MB in the beginning and 226.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:38,838 INFO L168 Benchmark]: Boogie Preprocessor took 30.02 ms. Allocated memory is still 252.7 MB. Free memory was 226.5 MB in the beginning and 224.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:38,839 INFO L168 Benchmark]: RCFGBuilder took 532.84 ms. Allocated memory is still 252.7 MB. Free memory was 224.0 MB in the beginning and 206.3 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:38,840 INFO L168 Benchmark]: TraceAbstraction took 1311.81 ms. Allocated memory is still 252.7 MB. Free memory was 206.3 MB in the beginning and 216.8 MB in the end (delta: -10.4 MB). Peak memory consumption was 102.2 MB. Max. memory is 14.2 GB. [2020-10-08 16:34:38,844 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 0.52 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 36.83 ms. Allocated memory is still 252.7 MB. Free memory was 229.1 MB in the beginning and 226.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 30.02 ms. Allocated memory is still 252.7 MB. Free memory was 226.5 MB in the beginning and 224.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 532.84 ms. Allocated memory is still 252.7 MB. Free memory was 224.0 MB in the beginning and 206.3 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1311.81 ms. Allocated memory is still 252.7 MB. Free memory was 206.3 MB in the beginning and 216.8 MB in the end (delta: -10.4 MB). Peak memory consumption was 102.2 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 13 procedures, 65 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: 1.0s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 27 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 49 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 8214 SizeOfPredicates, 0 NumberOfNonLiveVariables, 329 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...