java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/real-life/Elevator.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-e6fd87c [2018-07-25 08:36:02,774 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-25 08:36:02,776 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-25 08:36:02,790 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-25 08:36:02,791 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-25 08:36:02,793 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-25 08:36:02,794 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-25 08:36:02,797 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-25 08:36:02,800 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-25 08:36:02,802 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-25 08:36:02,803 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-25 08:36:02,848 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-07-25 08:36:02,862 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-25 08:36:02,862 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-25 08:36:02,863 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-25 08:36:02,864 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-25 08:36:02,864 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-25 08:36:02,864 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-25 08:36:02,864 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-25 08:36:02,864 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-25 08:36:02,927 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-25 08:36:02,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-25 08:36:02,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-25 08:36:02,946 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-25 08:36:02,947 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-25 08:36:02,948 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/Elevator.bpl [2018-07-25 08:36:02,948 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/Elevator.bpl' [2018-07-25 08:36:03,011 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-25 08:36:03,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-07-25 08:36:03,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-25 08:36:03,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-25 08:36:03,014 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-25 08:36:03,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,057 WARN L165 Inliner]: Program contained no entry procedure! [2018-07-25 08:36:03,057 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-07-25 08:36:03,057 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-07-25 08:36:03,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-25 08:36:03,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-25 08:36:03,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-25 08:36:03,061 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-25 08:36:03,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-25 08:36:03,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-25 08:36:03,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-25 08:36:03,111 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-25 08:36:03,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/1) ... [2018-07-25 08:36:03,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Elevator given in one single declaration [2018-07-25 08:36:03,199 INFO L130 BoogieDeclarations]: Found specification of procedure Elevator [2018-07-25 08:36:03,199 INFO L138 BoogieDeclarations]: Found implementation of procedure Elevator [2018-07-25 08:36:03,972 INFO L270 CfgBuilder]: Using library mode [2018-07-25 08:36:03,973 INFO L202 PluginConnector]: Adding new model Elevator.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 08:36:03 BoogieIcfgContainer [2018-07-25 08:36:03,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-25 08:36:03,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-25 08:36:03,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-25 08:36:03,978 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-25 08:36:03,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Elevator.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:03" (1/2) ... [2018-07-25 08:36:03,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733092c3 and model type Elevator.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.07 08:36:03, skipping insertion in model container [2018-07-25 08:36:03,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Elevator.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 08:36:03" (2/2) ... [2018-07-25 08:36:03,983 INFO L112 eAbstractionObserver]: Analyzing ICFG Elevator.bpl [2018-07-25 08:36:03,993 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-25 08:36:04,004 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-25 08:36:04,056 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-25 08:36:04,057 INFO L374 AbstractCegarLoop]: Interprodecural is true [2018-07-25 08:36:04,057 INFO L375 AbstractCegarLoop]: Hoare is true [2018-07-25 08:36:04,057 INFO L376 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-25 08:36:04,058 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-25 08:36:04,058 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-25 08:36:04,058 INFO L379 AbstractCegarLoop]: Difference is false [2018-07-25 08:36:04,058 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-25 08:36:04,058 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-25 08:36:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-25 08:36:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-25 08:36:04,089 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,091 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-25 08:36:04,092 INFO L415 AbstractCegarLoop]: === Iteration 1 === [ElevatorErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:36:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash 35150, now seen corresponding path program 1 times [2018-07-25 08:36:04,105 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:04,231 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 08:36:04,231 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-07-25 08:36:04,236 INFO L451 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-25 08:36:04,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-25 08:36:04,255 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-25 08:36:04,260 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-25 08:36:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:04,327 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-25 08:36:04,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-25 08:36:04,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-25 08:36:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:04,349 INFO L225 Difference]: With dead ends: 9 [2018-07-25 08:36:04,349 INFO L226 Difference]: Without dead ends: 6 [2018-07-25 08:36:04,357 INFO L574 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 [2018-07-25 08:36:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-25 08:36:04,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-25 08:36:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-25 08:36:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-25 08:36:04,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-07-25 08:36:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:04,408 INFO L472 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-25 08:36:04,408 INFO L473 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-25 08:36:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-25 08:36:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-25 08:36:04,409 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,409 INFO L354 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-25 08:36:04,409 INFO L415 AbstractCegarLoop]: === Iteration 2 === [ElevatorErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:36:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash 33951723, now seen corresponding path program 1 times [2018-07-25 08:36:04,410 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:04,520 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:04,520 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2018-07-25 08:36:04,526 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 08:36:04,526 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 08:36:04,526 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-25 08:36:04,527 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2018-07-25 08:36:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:04,614 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-25 08:36:04,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 08:36:04,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-07-25 08:36:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:04,615 INFO L225 Difference]: With dead ends: 9 [2018-07-25 08:36:04,615 INFO L226 Difference]: Without dead ends: 8 [2018-07-25 08:36:04,618 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-25 08:36:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-25 08:36:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-25 08:36:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-25 08:36:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-25 08:36:04,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-07-25 08:36:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:04,623 INFO L472 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-25 08:36:04,623 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 08:36:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-25 08:36:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-25 08:36:04,624 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,624 INFO L354 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-07-25 08:36:04,626 INFO L415 AbstractCegarLoop]: === Iteration 3 === [ElevatorErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:36:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1731959992, now seen corresponding path program 2 times [2018-07-25 08:36:04,627 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:04,704 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:04,704 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-25 08:36:04,704 INFO L451 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-25 08:36:04,706 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-25 08:36:04,707 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-25 08:36:04,707 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2018-07-25 08:36:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:04,791 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-25 08:36:04,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-25 08:36:04,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-07-25 08:36:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:04,792 INFO L225 Difference]: With dead ends: 11 [2018-07-25 08:36:04,792 INFO L226 Difference]: Without dead ends: 10 [2018-07-25 08:36:04,793 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-07-25 08:36:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-25 08:36:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-25 08:36:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-25 08:36:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-25 08:36:04,799 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-07-25 08:36:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:04,800 INFO L472 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-25 08:36:04,800 INFO L473 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-25 08:36:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-25 08:36:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-25 08:36:04,801 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,802 INFO L354 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-07-25 08:36:04,803 INFO L415 AbstractCegarLoop]: === Iteration 4 === [ElevatorErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:36:04,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2033931109, now seen corresponding path program 3 times [2018-07-25 08:36:04,804 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:04,960 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:04,960 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-25 08:36:04,961 INFO L451 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-25 08:36:04,961 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-25 08:36:04,961 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-25 08:36:04,962 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-07-25 08:36:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:05,068 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-25 08:36:05,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-25 08:36:05,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-07-25 08:36:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:05,070 INFO L225 Difference]: With dead ends: 13 [2018-07-25 08:36:05,070 INFO L226 Difference]: Without dead ends: 12 [2018-07-25 08:36:05,072 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-07-25 08:36:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-25 08:36:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-25 08:36:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-25 08:36:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-25 08:36:05,081 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-07-25 08:36:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:05,081 INFO L472 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-25 08:36:05,081 INFO L473 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-25 08:36:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-25 08:36:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-25 08:36:05,082 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:05,082 INFO L354 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-07-25 08:36:05,083 INFO L415 AbstractCegarLoop]: === Iteration 5 === [ElevatorErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:36:05,083 INFO L82 PathProgramCache]: Analyzing trace with hash 397848642, now seen corresponding path program 4 times [2018-07-25 08:36:05,085 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:05,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:05,484 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-25 08:36:05,485 INFO L451 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-25 08:36:05,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-25 08:36:05,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-07-25 08:36:05,486 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-07-25 08:36:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:05,609 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-25 08:36:05,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-25 08:36:05,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-07-25 08:36:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:05,611 INFO L225 Difference]: With dead ends: 15 [2018-07-25 08:36:05,611 INFO L226 Difference]: Without dead ends: 14 [2018-07-25 08:36:05,612 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-07-25 08:36:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-25 08:36:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-25 08:36:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-25 08:36:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-25 08:36:05,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-07-25 08:36:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:05,619 INFO L472 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-25 08:36:05,620 INFO L473 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-25 08:36:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-25 08:36:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-25 08:36:05,621 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:05,622 INFO L354 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-07-25 08:36:05,622 INFO L415 AbstractCegarLoop]: === Iteration 6 === [ElevatorErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:36:05,622 INFO L82 PathProgramCache]: Analyzing trace with hash 80628191, now seen corresponding path program 5 times [2018-07-25 08:36:05,623 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:06,482 WARN L169 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 55 [2018-07-25 08:36:06,886 WARN L169 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 61 [2018-07-25 08:36:07,124 WARN L169 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2018-07-25 08:36:07,380 WARN L169 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2018-07-25 08:36:07,548 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:07,572 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 28 [2018-07-25 08:36:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:07,682 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:07,682 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-25 08:36:07,682 INFO L451 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-25 08:36:07,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-25 08:36:07,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-07-25 08:36:07,684 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2018-07-25 08:36:07,861 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 13 [2018-07-25 08:36:08,120 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2018-07-25 08:36:08,245 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 57 [2018-07-25 08:36:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:08,564 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-25 08:36:08,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-25 08:36:08,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2018-07-25 08:36:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:08,566 INFO L225 Difference]: With dead ends: 17 [2018-07-25 08:36:08,566 INFO L226 Difference]: Without dead ends: 16 [2018-07-25 08:36:08,567 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2018-07-25 08:36:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-25 08:36:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-25 08:36:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-25 08:36:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-25 08:36:08,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-07-25 08:36:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:08,580 INFO L472 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-25 08:36:08,581 INFO L473 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-25 08:36:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-25 08:36:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-25 08:36:08,583 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:08,583 INFO L354 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-07-25 08:36:08,583 INFO L415 AbstractCegarLoop]: === Iteration 7 === [ElevatorErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:36:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash 174452796, now seen corresponding path program 6 times [2018-07-25 08:36:08,586 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:09,503 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 40 [2018-07-25 08:36:09,657 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2018-07-25 08:36:10,018 WARN L169 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 65 [2018-07-25 08:36:10,395 WARN L169 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 65 [2018-07-25 08:36:10,657 WARN L169 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 42 [2018-07-25 08:36:10,975 WARN L169 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 45 [2018-07-25 08:36:11,319 WARN L169 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 28 [2018-07-25 08:36:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:11,481 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:11,482 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-25 08:36:11,482 INFO L451 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-25 08:36:11,482 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-25 08:36:11,483 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-25 08:36:11,483 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2018-07-25 08:36:11,904 WARN L169 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2018-07-25 08:36:12,052 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2018-07-25 08:36:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:12,245 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-25 08:36:12,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-25 08:36:12,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2018-07-25 08:36:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:12,246 INFO L225 Difference]: With dead ends: 19 [2018-07-25 08:36:12,246 INFO L226 Difference]: Without dead ends: 18 [2018-07-25 08:36:12,247 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2018-07-25 08:36:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-25 08:36:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-25 08:36:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-25 08:36:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-25 08:36:12,257 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-07-25 08:36:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:12,258 INFO L472 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-25 08:36:12,258 INFO L473 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-25 08:36:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-25 08:36:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-25 08:36:12,259 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:12,259 INFO L354 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-07-25 08:36:12,260 INFO L415 AbstractCegarLoop]: === Iteration 8 === [ElevatorErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 08:36:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 145584985, now seen corresponding path program 7 times [2018-07-25 08:36:12,260 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:13,437 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,440 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,440 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,548 WARN L169 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 52 [2018-07-25 08:36:13,742 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,744 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,745 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,745 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,749 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:13,868 WARN L169 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 57 [2018-07-25 08:36:14,205 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:14,536 WARN L169 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 70 [2018-07-25 08:36:15,011 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:15,193 WARN L169 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 75 [2018-07-25 08:36:16,189 WARN L169 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 92 [2018-07-25 08:36:17,062 WARN L169 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 102 [2018-07-25 08:36:18,208 WARN L169 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 364 DAG size of output: 78 [2018-07-25 08:36:18,830 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:19,474 WARN L169 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 389 DAG size of output: 76 [2018-07-25 08:36:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:19,656 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:19,656 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-25 08:36:19,657 INFO L451 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-25 08:36:19,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-25 08:36:19,657 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-07-25 08:36:19,658 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 16 states. [2018-07-25 08:36:20,211 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 81 [2018-07-25 08:36:20,363 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 68 [2018-07-25 08:36:20,523 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2018-07-25 08:36:20,699 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2018-07-25 08:36:20,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-25 08:36:20,999 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createLAEquality(EqualityProxy.java:91) at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createCCEquality(EqualityProxy.java:112) at de.uni_freiburg.informatik.ultimate.smtinterpol.theory.linar.LinArSolve.mbtc(LinArSolve.java:2063) at de.uni_freiburg.informatik.ultimate.smtinterpol.theory.linar.LinArSolve.computeConflictClause(LinArSolve.java:618) at de.uni_freiburg.informatik.ultimate.smtinterpol.dpll.DPLLEngine.checkConsistency(DPLLEngine.java:1027) at de.uni_freiburg.informatik.ultimate.smtinterpol.dpll.DPLLEngine.solve(DPLLEngine.java:1171) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol$CheckType$1.check(SMTInterpol.java:114) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.checkSatAssuming(SMTInterpol.java:502) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.checkSat(SMTInterpol.java:455) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkValidity(IncrementalHoareTripleChecker.java:664) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:65) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:642) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:571) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:464) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:309) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:151) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:120) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-07-25 08:36:21,004 INFO L168 Benchmark]: Toolchain (without parser) took 17991.94 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 440.9 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -141.0 MB). Peak memory consumption was 300.0 MB. Max. memory is 7.1 GB. [2018-07-25 08:36:21,005 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 08:36:21,006 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 08:36:21,007 INFO L168 Benchmark]: Boogie Preprocessor took 49.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-25 08:36:21,007 INFO L168 Benchmark]: RCFGBuilder took 862.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-07-25 08:36:21,008 INFO L168 Benchmark]: TraceAbstraction took 17028.91 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 440.9 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -172.7 MB). Peak memory consumption was 268.3 MB. Max. memory is 7.1 GB. [2018-07-25 08:36:21,013 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 862.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17028.91 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 440.9 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -172.7 MB). Peak memory consumption was 268.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createLAEquality(EqualityProxy.java:91) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Elevator.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-07-25_08-36-21-026.csv Received shutdown request...