java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/programs/recursive/regression/bpl/wrongBFS.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:07:50,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:07:50,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:07:50,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:07:50,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:07:50,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:07:50,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:07:50,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:07:50,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:07:50,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:07:50,398 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:07:50,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:07:50,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:07:50,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:07:50,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:07:50,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:07:50,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:07:50,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:07:50,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:07:50,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:07:50,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:07:50,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:07:50,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:07:50,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:07:50,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 11:07:50,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 11:07:50,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 11:07:50,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 11:07:50,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 11:07:50,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 11:07:50,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:07:50,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:07:50,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:07:50,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:07:50,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:07:50,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:07:50,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:07:50,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:07:50,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:07:50,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:07:50,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:07:50,455 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:07:50,467 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:07:50,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:07:50,472 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:07:50,472 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:07:50,473 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/recursive/regression/bpl/wrongBFS.bpl [2019-08-05 11:07:50,473 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/recursive/regression/bpl/wrongBFS.bpl' [2019-08-05 11:07:50,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:07:50,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:07:50,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:07:50,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:07:50,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:07:50,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,541 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 11:07:50,541 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 11:07:50,542 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 11:07:50,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:07:50,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:07:50,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:07:50,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:07:50,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/1) ... [2019-08-05 11:07:50,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:07:50,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:07:50,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:07:50,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:07:50,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (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:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-08-05 11:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure u [2019-08-05 11:07:50,640 INFO L138 BoogieDeclarations]: Found implementation of procedure u [2019-08-05 11:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 11:07:50,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 11:07:50,958 INFO L275 CfgBuilder]: Using library mode [2019-08-05 11:07:50,958 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:07:50,959 INFO L202 PluginConnector]: Adding new model wrongBFS.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:07:50 BoogieIcfgContainer [2019-08-05 11:07:50,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:07:50,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:07:50,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:07:50,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:07:50,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:50" (1/2) ... [2019-08-05 11:07:50,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6de7c3 and model type wrongBFS.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:07:50, skipping insertion in model container [2019-08-05 11:07:50,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "wrongBFS.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:07:50" (2/2) ... [2019-08-05 11:07:50,972 INFO L109 eAbstractionObserver]: Analyzing ICFG wrongBFS.bpl [2019-08-05 11:07:50,982 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:07:50,992 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:07:51,010 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:07:51,041 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:07:51,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:07:51,042 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:07:51,042 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:07:51,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:07:51,042 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:07:51,042 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:07:51,043 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:07:51,043 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:07:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-08-05 11:07:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-08-05 11:07:51,072 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:51,073 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-08-05 11:07:51,076 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:07:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1598662260, now seen corresponding path program 1 times [2019-08-05 11:07:51,136 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:51,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-05 11:07:51,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:07:51,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:07:51,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-08-05 11:07:51,496 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 11:07:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 11:07:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-05 11:07:51,511 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 6 states. [2019-08-05 11:07:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:51,725 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2019-08-05 11:07:51,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 11:07:51,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-08-05 11:07:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:51,736 INFO L225 Difference]: With dead ends: 16 [2019-08-05 11:07:51,737 INFO L226 Difference]: Without dead ends: 12 [2019-08-05 11:07:51,739 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-08-05 11:07:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-08-05 11:07:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-08-05 11:07:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-05 11:07:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-08-05 11:07:51,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2019-08-05 11:07:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:51,786 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-08-05 11:07:51,786 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 11:07:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-08-05 11:07:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-08-05 11:07:51,788 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:51,788 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-08-05 11:07:51,789 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:07:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:51,790 INFO L82 PathProgramCache]: Analyzing trace with hash -136346222, now seen corresponding path program 1 times [2019-08-05 11:07:51,791 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:51,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2019-08-05 11:07:51,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-08-05 11:07:51,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:07:51,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-05 11:07:51,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-05 11:07:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-05 11:07:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-08-05 11:07:51,982 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2019-08-05 11:07:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:52,337 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2019-08-05 11:07:52,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-08-05 11:07:52,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-08-05 11:07:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:52,339 INFO L225 Difference]: With dead ends: 14 [2019-08-05 11:07:52,339 INFO L226 Difference]: Without dead ends: 14 [2019-08-05 11:07:52,340 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-08-05 11:07:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-08-05 11:07:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-08-05 11:07:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-05 11:07:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-08-05 11:07:52,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2019-08-05 11:07:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:52,346 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-08-05 11:07:52,346 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-05 11:07:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-08-05 11:07:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-08-05 11:07:52,347 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:52,347 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2019-08-05 11:07:52,347 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:07:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1347955642, now seen corresponding path program 2 times [2019-08-05 11:07:52,349 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 11:07:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 11:07:52,403 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-08-05 11:07:52,430 INFO L202 PluginConnector]: Adding new model wrongBFS.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:07:52 BoogieIcfgContainer [2019-08-05 11:07:52,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:07:52,434 INFO L168 Benchmark]: Toolchain (without parser) took 1926.20 ms. Allocated memory was 134.7 MB in the beginning and 169.9 MB in the end (delta: 35.1 MB). Free memory was 111.0 MB in the beginning and 139.6 MB in the end (delta: -28.7 MB). Peak memory consumption was 6.5 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:52,435 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 134.7 MB. Free memory was 112.2 MB in the beginning and 112.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-08-05 11:07:52,436 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.63 ms. Allocated memory is still 134.7 MB. Free memory was 111.0 MB in the beginning and 109.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:52,437 INFO L168 Benchmark]: Boogie Preprocessor took 20.28 ms. Allocated memory is still 134.7 MB. Free memory was 109.0 MB in the beginning and 108.1 MB in the end (delta: 933.6 kB). Peak memory consumption was 933.6 kB. Max. memory is 7.1 GB. [2019-08-05 11:07:52,438 INFO L168 Benchmark]: RCFGBuilder took 394.40 ms. Allocated memory is still 134.7 MB. Free memory was 107.9 MB in the beginning and 98.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:52,439 INFO L168 Benchmark]: TraceAbstraction took 1468.95 ms. Allocated memory was 134.7 MB in the beginning and 169.9 MB in the end (delta: 35.1 MB). Free memory was 98.4 MB in the beginning and 139.6 MB in the end (delta: -41.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:07:52,444 INFO L335 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 0.21 ms. Allocated memory is still 134.7 MB. Free memory was 112.2 MB in the beginning and 112.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.63 ms. Allocated memory is still 134.7 MB. Free memory was 111.0 MB in the beginning and 109.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.28 ms. Allocated memory is still 134.7 MB. Free memory was 109.0 MB in the beginning and 108.1 MB in the end (delta: 933.6 kB). Peak memory consumption was 933.6 kB. Max. memory is 7.1 GB. * RCFGBuilder took 394.40 ms. Allocated memory is still 134.7 MB. Free memory was 107.9 MB in the beginning and 98.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1468.95 ms. Allocated memory was 134.7 MB in the beginning and 169.9 MB in the end (delta: 35.1 MB). Free memory was 98.4 MB in the beginning and 139.6 MB in the end (delta: -41.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: assertion can be violated assertion can be violated We found a FailurePath: [L17] g := 0; VAL [g=0] [L18] CALL call u(); VAL [g=0, old(g)=0] [L27] g := g + 1; VAL [g=1, old(g)=0] [L28] COND TRUE g <= 2 VAL [g=1, old(g)=0] [L29] CALL call u(); VAL [g=1, old(g)=1] [L27] g := g + 1; VAL [g=2, old(g)=1] [L28] COND TRUE g <= 2 VAL [g=2, old(g)=1] [L29] CALL call u(); VAL [g=2, old(g)=2] [L27] g := g + 1; VAL [g=3, old(g)=2] [L28] COND FALSE !(g <= 2) VAL [g=3, old(g)=2] [L29] RET call u(); VAL [g=3, old(g)=1] [L29] RET call u(); VAL [g=3, old(g)=0] [L18] RET call u(); VAL [g=3] [L19] assert g != 3; VAL [g=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. UNSAFE Result, 1.3s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 7 SDslu, 18 SDs, 0 SdLazy, 66 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 851 SizeOfPredicates, 2 NumberOfNonLiveVariables, 42 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...