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/McCarthy91_RecursiveAndImperative.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:07:48,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:07:48,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:07:48,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:07:48,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:07:48,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:07:48,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:07:48,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:07:48,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:07:48,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:07:48,206 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:07:48,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:07:48,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:07:48,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:07:48,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:07:48,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:07:48,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:07:48,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:07:48,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:07:48,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:07:48,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:07:48,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:07:48,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:07:48,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:07:48,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 11:07:48,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:07:48,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:07:48,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:07:48,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:07:48,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:07:48,297 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:07:48,299 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:07:48,299 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:07:48,300 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/recursive/regression/bpl/McCarthy91_RecursiveAndImperative.bpl [2019-08-05 11:07:48,300 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/recursive/regression/bpl/McCarthy91_RecursiveAndImperative.bpl' [2019-08-05 11:07:48,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:07:48,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:07:48,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:07:48,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:07:48,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:07:48,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,373 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 11:07:48,374 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 11:07:48,374 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 11:07:48,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:07:48,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:07:48,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:07:48,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:07:48,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/1) ... [2019-08-05 11:07:48,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:07:48,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:07:48,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:07:48,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:07:48,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (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 11:07:48,479 INFO L130 BoogieDeclarations]: Found specification of procedure McCarthyImp [2019-08-05 11:07:48,479 INFO L138 BoogieDeclarations]: Found implementation of procedure McCarthyImp [2019-08-05 11:07:48,479 INFO L130 BoogieDeclarations]: Found specification of procedure McCarthyRec [2019-08-05 11:07:48,479 INFO L138 BoogieDeclarations]: Found implementation of procedure McCarthyRec [2019-08-05 11:07:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2019-08-05 11:07:48,480 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2019-08-05 11:07:48,818 INFO L275 CfgBuilder]: Using library mode [2019-08-05 11:07:48,818 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-08-05 11:07:48,819 INFO L202 PluginConnector]: Adding new model McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:07:48 BoogieIcfgContainer [2019-08-05 11:07:48,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:07:48,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:07:48,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:07:48,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:07:48,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:48" (1/2) ... [2019-08-05 11:07:48,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cb81b and model type McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:07:48, skipping insertion in model container [2019-08-05 11:07:48,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:07:48" (2/2) ... [2019-08-05 11:07:48,827 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91_RecursiveAndImperative.bpl [2019-08-05 11:07:48,836 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:07:48,844 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:07:48,859 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:07:48,888 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:07:48,888 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:07:48,889 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:07:48,889 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:07:48,889 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:07:48,890 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:07:48,890 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:07:48,890 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:07:48,890 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:07:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-08-05 11:07:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 11:07:48,911 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:48,912 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-08-05 11:07:48,914 INFO L418 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:07:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:48,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1812427952, now seen corresponding path program 1 times [2019-08-05 11:07:48,966 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:49,019 WARN L254 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 13 conjunts are in the unsatisfiable core [2019-08-05 11:07:49,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:49,242 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 11:07:49,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:07:49,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-08-05 11:07:49,249 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 11:07:49,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 11:07:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:07:49,264 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 5 states. [2019-08-05 11:07:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:49,557 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-08-05 11:07:49,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:07:49,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-08-05 11:07:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:49,572 INFO L225 Difference]: With dead ends: 17 [2019-08-05 11:07:49,572 INFO L226 Difference]: Without dead ends: 11 [2019-08-05 11:07:49,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-05 11:07:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-08-05 11:07:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-08-05 11:07:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-05 11:07:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2019-08-05 11:07:49,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2019-08-05 11:07:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:49,617 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2019-08-05 11:07:49,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 11:07:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2019-08-05 11:07:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-08-05 11:07:49,620 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:49,620 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-08-05 11:07:49,621 INFO L418 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:07:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash 680307752, now seen corresponding path program 1 times [2019-08-05 11:07:49,622 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:49,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 18 conjunts are in the unsatisfiable core [2019-08-05 11:07:49,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:50,080 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:07:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-08-05 11:07:50,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:07:50,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-08-05 11:07:50,164 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-08-05 11:07:50,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-08-05 11:07:50,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-08-05 11:07:50,166 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 9 states. [2019-08-05 11:07:50,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:50,648 INFO L93 Difference]: Finished difference Result 18 states and 28 transitions. [2019-08-05 11:07:50,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-08-05 11:07:50,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-08-05 11:07:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:50,650 INFO L225 Difference]: With dead ends: 18 [2019-08-05 11:07:50,650 INFO L226 Difference]: Without dead ends: 16 [2019-08-05 11:07:50,651 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-08-05 11:07:50,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-08-05 11:07:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-08-05 11:07:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-08-05 11:07:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2019-08-05 11:07:50,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 14 [2019-08-05 11:07:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:50,661 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2019-08-05 11:07:50,661 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-08-05 11:07:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2019-08-05 11:07:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-08-05 11:07:50,663 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:50,663 INFO L399 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2019-08-05 11:07:50,665 INFO L418 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:07:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash 34954656, now seen corresponding path program 2 times [2019-08-05 11:07:50,666 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:50,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2019-08-05 11:07:50,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:51,279 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2019-08-05 11:07:51,291 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:07:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-08-05 11:07:51,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:07:51,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-08-05 11:07:51,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-08-05 11:07:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-08-05 11:07:51,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-08-05 11:07:51,479 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand 12 states. [2019-08-05 11:07:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:51,839 INFO L93 Difference]: Finished difference Result 18 states and 28 transitions. [2019-08-05 11:07:51,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-08-05 11:07:51,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-08-05 11:07:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:51,841 INFO L225 Difference]: With dead ends: 18 [2019-08-05 11:07:51,841 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:07:51,842 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-08-05 11:07:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:07:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:07:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:07:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:07:51,843 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2019-08-05 11:07:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:51,844 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:07:51,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-08-05 11:07:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:07:51,844 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:07:51,849 INFO L202 PluginConnector]: Adding new model McCarthy91_RecursiveAndImperative.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:07:51 BoogieIcfgContainer [2019-08-05 11:07:51,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:07:51,852 INFO L168 Benchmark]: Toolchain (without parser) took 3513.03 ms. Allocated memory was 133.7 MB in the beginning and 170.9 MB in the end (delta: 37.2 MB). Free memory was 109.9 MB in the beginning and 73.1 MB in the end (delta: 36.7 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:51,853 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 133.7 MB. Free memory was 111.1 MB in the beginning and 110.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-08-05 11:07:51,854 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.14 ms. Allocated memory is still 133.7 MB. Free memory was 109.9 MB in the beginning and 107.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:51,855 INFO L168 Benchmark]: Boogie Preprocessor took 22.47 ms. Allocated memory is still 133.7 MB. Free memory was 107.7 MB in the beginning and 106.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:51,856 INFO L168 Benchmark]: RCFGBuilder took 406.39 ms. Allocated memory is still 133.7 MB. Free memory was 106.4 MB in the beginning and 93.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:51,857 INFO L168 Benchmark]: TraceAbstraction took 3028.73 ms. Allocated memory was 133.7 MB in the beginning and 170.9 MB in the end (delta: 37.2 MB). Free memory was 93.7 MB in the beginning and 73.1 MB in the end (delta: 20.6 MB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:51,861 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 0.23 ms. Allocated memory is still 133.7 MB. Free memory was 111.1 MB in the beginning and 110.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 51.14 ms. Allocated memory is still 133.7 MB. Free memory was 109.9 MB in the beginning and 107.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.47 ms. Allocated memory is still 133.7 MB. Free memory was 107.7 MB in the beginning and 106.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.39 ms. Allocated memory is still 133.7 MB. Free memory was 106.4 MB in the beginning and 93.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3028.73 ms. Allocated memory was 133.7 MB in the beginning and 170.9 MB in the end (delta: 37.2 MB). Free memory was 93.7 MB in the beginning and 73.1 MB in the end (delta: 20.6 MB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 49]: 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 3 procedures, 12 locations, 1 error locations. SAFE Result, 2.9s OverallTime, 3 OverallIterations, 5 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 26 SDtfs, 12 SDslu, 70 SDs, 0 SdLazy, 231 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 3931 SizeOfPredicates, 9 NumberOfNonLiveVariables, 144 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 24/41 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...