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/openBugs/BugSequentialCompositionOfCall.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:16:34,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:16:34,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:16:34,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:16:34,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:16:34,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:16:34,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:16:34,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:16:34,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:16:34,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:16:34,344 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:16:34,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:16:34,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:16:34,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:16:34,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:16:34,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:16:34,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:16:34,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:16:34,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:16:34,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:16:34,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:16:34,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:16:34,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:16:34,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:16:34,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 11:16:34,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:16:34,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:16:34,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:16:34,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:16:34,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:16:34,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:16:34,426 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:16:34,426 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:16:34,427 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/openBugs/BugSequentialCompositionOfCall.bpl [2019-08-05 11:16:34,428 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/openBugs/BugSequentialCompositionOfCall.bpl' [2019-08-05 11:16:34,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:16:34,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:16:34,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:16:34,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:16:34,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:16:34,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:16:34,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:16:34,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:16:34,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:16:34,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/1) ... [2019-08-05 11:16:34,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:16:34,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:16:34,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:16:34,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:16:34,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (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 11:16:34,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 11:16:34,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 11:16:34,874 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 11:16:34,875 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-08-05 11:16:34,877 INFO L202 PluginConnector]: Adding new model BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:16:34 BoogieIcfgContainer [2019-08-05 11:16:34,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:16:34,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:16:34,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:16:34,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:16:34,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:34" (1/2) ... [2019-08-05 11:16:34,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dd6744 and model type BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:16:34, skipping insertion in model container [2019-08-05 11:16:34,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:16:34" (2/2) ... [2019-08-05 11:16:34,885 INFO L109 eAbstractionObserver]: Analyzing ICFG BugSequentialCompositionOfCall.bpl [2019-08-05 11:16:34,895 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:16:34,902 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-08-05 11:16:34,919 INFO L252 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-08-05 11:16:34,948 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:16:34,949 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:16:34,949 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:16:34,950 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:16:34,950 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:16:34,951 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:16:34,951 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:16:34,951 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:16:34,951 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:16:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-08-05 11:16:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-08-05 11:16:34,983 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:34,984 INFO L399 BasicCegarLoop]: trace histogram [1, 1] [2019-08-05 11:16:34,987 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONPRE_CONDITIONandASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONPOST_CONDITIONandASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONPOST_CONDITIONandASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONPRE_CONDITIONandASSERT]=== [2019-08-05 11:16:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 962, now seen corresponding path program 1 times [2019-08-05 11:16:35,048 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:35,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:16:35,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:35,165 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 11:16:35,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:16:35,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-08-05 11:16:35,173 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:16:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:16:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:16:35,188 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-08-05 11:16:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:35,270 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-08-05 11:16:35,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:16:35,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-08-05 11:16:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:35,287 INFO L225 Difference]: With dead ends: 10 [2019-08-05 11:16:35,287 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 11:16:35,289 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:16:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 11:16:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 11:16:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 11:16:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-08-05 11:16:35,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 2 [2019-08-05 11:16:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:35,329 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-08-05 11:16:35,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:16:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-08-05 11:16:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:16:35,330 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:35,330 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:16:35,330 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONPRE_CONDITIONandASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONPOST_CONDITIONandASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONPOST_CONDITIONandASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONPRE_CONDITIONandASSERT]=== [2019-08-05 11:16:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash 925700, now seen corresponding path program 1 times [2019-08-05 11:16:35,332 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:35,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:16:35,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:35,394 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 11:16:35,394 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:16:35,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:16:35,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:16:35,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:16:35,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:16:35,397 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2019-08-05 11:16:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:35,423 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 11:16:35,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:16:35,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-08-05 11:16:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:35,425 INFO L225 Difference]: With dead ends: 8 [2019-08-05 11:16:35,425 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 11:16:35,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:16:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 11:16:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-05 11:16:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-05 11:16:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-08-05 11:16:35,429 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2019-08-05 11:16:35,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:35,430 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-08-05 11:16:35,430 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:16:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-08-05 11:16:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 11:16:35,431 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:35,431 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-08-05 11:16:35,431 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONPRE_CONDITIONandASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONPOST_CONDITIONandASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONPOST_CONDITIONandASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONPRE_CONDITIONandASSERT]=== [2019-08-05 11:16:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:35,432 INFO L82 PathProgramCache]: Analyzing trace with hash 28696743, now seen corresponding path program 1 times [2019-08-05 11:16:35,433 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:35,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-05 11:16:35,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:35,493 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 11:16:35,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:16:35,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:16:35,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:16:35,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:16:35,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:16:35,496 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 4 states. [2019-08-05 11:16:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:35,564 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 11:16:35,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:16:35,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-08-05 11:16:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:35,566 INFO L225 Difference]: With dead ends: 7 [2019-08-05 11:16:35,566 INFO L226 Difference]: Without dead ends: 7 [2019-08-05 11:16:35,566 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:16:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-05 11:16:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-05 11:16:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 11:16:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 11:16:35,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-08-05 11:16:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:35,570 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 11:16:35,570 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:16:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 11:16:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 11:16:35,570 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:35,571 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-08-05 11:16:35,571 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONPRE_CONDITIONandASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONPOST_CONDITIONandASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONPOST_CONDITIONandASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONPRE_CONDITIONandASSERT]=== [2019-08-05 11:16:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:35,572 INFO L82 PathProgramCache]: Analyzing trace with hash 889599079, now seen corresponding path program 1 times [2019-08-05 11:16:35,573 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:35,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-05 11:16:35,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:35,611 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 11:16:35,611 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:16:35,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-08-05 11:16:35,612 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:16:35,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:16:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:16:35,613 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 3 states. [2019-08-05 11:16:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:35,614 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 11:16:35,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:16:35,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-08-05 11:16:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:35,615 INFO L225 Difference]: With dead ends: 6 [2019-08-05 11:16:35,615 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:16:35,616 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:16:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:16:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:16:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:16:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:16:35,617 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2019-08-05 11:16:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:35,618 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:16:35,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:16:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:16:35,618 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:16:35,624 INFO L202 PluginConnector]: Adding new model BugSequentialCompositionOfCall.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:16:35 BoogieIcfgContainer [2019-08-05 11:16:35,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:16:35,626 INFO L168 Benchmark]: Toolchain (without parser) took 1161.04 ms. Allocated memory is still 135.3 MB. Free memory was 112.8 MB in the beginning and 69.0 MB in the end (delta: 43.8 MB). Peak memory consumption was 43.8 MB. Max. memory is 7.1 GB. [2019-08-05 11:16:35,628 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 135.3 MB. Free memory was 114.0 MB in the beginning and 113.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 11:16:35,629 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.89 ms. Allocated memory is still 135.3 MB. Free memory was 112.8 MB in the beginning and 110.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-08-05 11:16:35,630 INFO L168 Benchmark]: Boogie Preprocessor took 18.97 ms. Allocated memory is still 135.3 MB. Free memory was 110.6 MB in the beginning and 109.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:16:35,631 INFO L168 Benchmark]: RCFGBuilder took 339.22 ms. Allocated memory is still 135.3 MB. Free memory was 109.5 MB in the beginning and 100.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-08-05 11:16:35,632 INFO L168 Benchmark]: TraceAbstraction took 745.32 ms. Allocated memory is still 135.3 MB. Free memory was 99.9 MB in the beginning and 69.0 MB in the end (delta: 30.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 7.1 GB. [2019-08-05 11:16:35,636 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 0.25 ms. Allocated memory is still 135.3 MB. Free memory was 114.0 MB in the beginning and 113.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.89 ms. Allocated memory is still 135.3 MB. Free memory was 112.8 MB in the beginning and 110.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.97 ms. Allocated memory is still 135.3 MB. Free memory was 110.6 MB in the beginning and 109.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 339.22 ms. Allocated memory is still 135.3 MB. Free memory was 109.5 MB in the beginning and 100.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 745.32 ms. Allocated memory is still 135.3 MB. Free memory was 99.9 MB in the beginning and 69.0 MB in the end (delta: 30.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: procedure precondition always holds and assertion always holds For all program executions holds that procedure precondition always holds and assertion always holds at this location - PositiveResult [Line: 52]: procedure postcondition always holds and assertion always holds For all program executions holds that procedure postcondition always holds and assertion always holds at this location - PositiveResult [Line: 35]: procedure postcondition always holds and assertion always holds For all program executions holds that procedure postcondition always holds and assertion always holds at this location - PositiveResult [Line: 52]: procedure precondition always holds and assertion always holds For all program executions holds that procedure precondition always holds and assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. SAFE Result, 0.6s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 25 SDtfs, 13 SDslu, 8 SDs, 0 SdLazy, 12 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 139 SizeOfPredicates, 2 NumberOfNonLiveVariables, 52 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...