java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/real-life/ElevatorWithAssignments.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:14:52,603 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:14:52,606 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:14:52,625 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:14:52,626 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:14:52,627 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:14:52,628 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:14:52,631 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:14:52,639 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:14:52,640 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:14:52,641 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 15:14:52,641 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 15:14:52,642 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 15:14:52,643 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 15:14:52,644 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 15:14:52,645 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 15:14:52,646 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 15:14:52,648 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 15:14:52,650 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 15:14:52,652 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 15:14:52,653 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 15:14:52,655 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 15:14:52,657 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-23 15:14:52,666 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf [2018-07-23 15:14:52,691 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:14:52,691 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:14:52,693 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:14:52,693 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:14:52,694 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:14:52,694 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:14:52,694 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:14:52,694 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:14:52,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:14:52,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:14:52,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:14:52,801 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:14:52,802 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:14:52,803 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/ElevatorWithAssignments.bpl [2018-07-23 15:14:52,803 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/ElevatorWithAssignments.bpl' [2018-07-23 15:14:52,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:14:52,890 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:14:52,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:14:52,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:14:52,892 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:14:52,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/1) ... [2018-07-23 15:14:52,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/1) ... [2018-07-23 15:14:52,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/1) ... [2018-07-23 15:14:52,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/1) ... [2018-07-23 15:14:52,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/1) ... [2018-07-23 15:14:52,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/1) ... [2018-07-23 15:14:52,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/1) ... [2018-07-23 15:14:52,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:14:52,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:14:52,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:14:52,970 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:14:52,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/1) ... [2018-07-23 15:14:53,060 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Elevator given in one single declaration [2018-07-23 15:14:53,060 INFO L130 BoogieDeclarations]: Found specification of procedure Elevator [2018-07-23 15:14:53,061 INFO L138 BoogieDeclarations]: Found implementation of procedure Elevator [2018-07-23 15:14:53,887 INFO L258 CfgBuilder]: Using library mode [2018-07-23 15:14:53,888 INFO L202 PluginConnector]: Adding new model ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:14:53 BoogieIcfgContainer [2018-07-23 15:14:53,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:14:53,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:14:53,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:14:53,895 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:14:53,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:14:52" (1/2) ... [2018-07-23 15:14:53,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6770f92f and model type ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:14:53, skipping insertion in model container [2018-07-23 15:14:53,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:14:53" (2/2) ... [2018-07-23 15:14:53,900 INFO L112 eAbstractionObserver]: Analyzing ICFG ElevatorWithAssignments.bpl [2018-07-23 15:14:53,910 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:14:53,921 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:14:53,965 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:14:53,966 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:14:53,966 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:14:53,966 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:14:53,967 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:14:53,967 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:14:53,967 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:14:53,967 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:14:53,967 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:14:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-23 15:14:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-07-23 15:14:53,988 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:53,989 INFO L353 BasicCegarLoop]: trace histogram [1, 1] [2018-07-23 15:14:53,989 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:14:53,994 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2018-07-23 15:14:53,999 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:54,067 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:14:54,067 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-07-23 15:14:54,074 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:14:54,090 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:14:54,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:14:54,094 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-23 15:14:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:54,137 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:14:54,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:14:54,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-07-23 15:14:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:54,158 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:14:54,162 INFO L226 Difference]: Without dead ends: 6 [2018-07-23 15:14:54,168 INFO L573 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 [2018-07-23 15:14:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-23 15:14:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 5. [2018-07-23 15:14:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-23 15:14:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-23 15:14:54,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 2 [2018-07-23 15:14:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:54,216 INFO L471 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-23 15:14:54,216 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:14:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-23 15:14:54,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:14:54,217 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:54,217 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:14:54,217 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:14:54,218 INFO L82 PathProgramCache]: Analyzing trace with hash 932048, now seen corresponding path program 1 times [2018-07-23 15:14:54,218 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:54,301 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:54,301 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2018-07-23 15:14:54,303 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:14:54,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:14:54,304 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:14:54,305 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-07-23 15:14:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:54,355 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:14:54,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:14:54,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 15:14:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:54,357 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:14:54,357 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:14:54,359 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:14:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:14:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-07-23 15:14:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:14:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:14:54,364 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-23 15:14:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:54,365 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:14:54,365 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:14:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:14:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:14:54,366 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:54,366 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 1, 1] [2018-07-23 15:14:54,366 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:14:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash 895704733, now seen corresponding path program 2 times [2018-07-23 15:14:54,367 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:54,481 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:54,481 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:14:54,482 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:14:54,482 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:14:54,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:14:54,483 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-07-23 15:14:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:54,590 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-07-23 15:14:54,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:14:54,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-07-23 15:14:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:54,594 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:14:54,595 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:14:54,595 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:14:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:14:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:14:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:14:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:14:54,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 15:14:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:54,604 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:14:54,606 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:14:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:14:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:14:54,607 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:54,608 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 1, 1] [2018-07-23 15:14:54,610 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:14:54,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1778795818, now seen corresponding path program 3 times [2018-07-23 15:14:54,611 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:54,841 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:54,841 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:14:54,842 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:14:54,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:14:54,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:14:54,843 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-07-23 15:14:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:54,901 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:14:54,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:14:54,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-07-23 15:14:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:54,903 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:14:54,904 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 15:14:54,905 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:14:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 15:14:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-23 15:14:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:14:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:14:54,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-07-23 15:14:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:54,918 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:14:54,919 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:14:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:14:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:14:54,920 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:54,920 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 1, 1] [2018-07-23 15:14:54,921 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:14:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash 25803895, now seen corresponding path program 4 times [2018-07-23 15:14:54,921 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:55,294 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:55,295 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:14:55,295 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:14:55,296 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:14:55,296 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:14:55,296 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-07-23 15:14:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:55,451 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 15:14:55,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:14:55,453 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-07-23 15:14:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:55,454 INFO L225 Difference]: With dead ends: 14 [2018-07-23 15:14:55,454 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:14:55,455 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:14:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:14:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:14:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:14:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-23 15:14:55,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-07-23 15:14:55,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:55,469 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-23 15:14:55,469 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:14:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-23 15:14:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:14:55,470 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:55,470 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 1, 1] [2018-07-23 15:14:55,470 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:14:55,471 INFO L82 PathProgramCache]: Analyzing trace with hash -972254076, now seen corresponding path program 5 times [2018-07-23 15:14:55,471 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:55,887 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2018-07-23 15:14:56,163 WARN L169 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2018-07-23 15:14:56,374 WARN L169 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2018-07-23 15:14:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:56,484 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:56,484 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:14:56,485 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:14:56,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:14:56,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:14:56,486 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-07-23 15:14:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:14:56,751 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 15:14:56,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:14:56,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2018-07-23 15:14:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:14:56,752 INFO L225 Difference]: With dead ends: 16 [2018-07-23 15:14:56,753 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:14:56,753 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:14:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:14:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:14:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:14:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-23 15:14:56,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-07-23 15:14:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:14:56,765 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-23 15:14:56,765 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:14:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-23 15:14:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:14:56,766 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:14:56,766 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 1, 1] [2018-07-23 15:14:56,767 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:14:56,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1966710097, now seen corresponding path program 6 times [2018-07-23 15:14:56,767 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:14:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:14:57,492 WARN L169 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 41 [2018-07-23 15:14:58,120 WARN L169 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 60 [2018-07-23 15:14:58,764 WARN L169 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 79 [2018-07-23 15:14:59,373 WARN L169 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 77 [2018-07-23 15:14:59,654 WARN L169 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 55 [2018-07-23 15:14:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:14:59,754 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:14:59,754 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:14:59,755 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:14:59,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:14:59,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:14:59,756 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2018-07-23 15:14:59,962 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2018-07-23 15:15:00,132 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2018-07-23 15:15:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:00,257 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-23 15:15:00,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:15:00,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-07-23 15:15:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:00,258 INFO L225 Difference]: With dead ends: 18 [2018-07-23 15:15:00,258 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:15:00,259 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:15:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:15:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:15:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:15:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 15:15:00,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-07-23 15:15:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:00,274 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 15:15:00,274 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:15:00,274 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 15:15:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:15:00,275 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:00,275 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 1, 1] [2018-07-23 15:15:00,276 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:15:00,276 INFO L82 PathProgramCache]: Analyzing trace with hash 222799582, now seen corresponding path program 7 times [2018-07-23 15:15:00,276 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:02,059 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:02,059 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:02,189 WARN L169 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 39 [2018-07-23 15:15:03,587 WARN L169 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 296 DAG size of output: 68 [2018-07-23 15:15:04,990 WARN L169 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 290 DAG size of output: 89 [2018-07-23 15:15:06,158 WARN L169 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 272 DAG size of output: 86 [2018-07-23 15:15:06,751 WARN L169 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 76 [2018-07-23 15:15:07,503 WARN L169 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 80 [2018-07-23 15:15:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:07,706 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:07,706 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:15:07,707 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:15:07,707 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:15:07,707 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:15:07,707 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 12 states. [2018-07-23 15:15:07,981 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 73 [2018-07-23 15:15:08,131 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2018-07-23 15:15:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:08,281 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-23 15:15:08,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:15:08,281 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-07-23 15:15:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:08,282 INFO L225 Difference]: With dead ends: 20 [2018-07-23 15:15:08,282 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:15:08,283 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:15:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:15:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:15:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:15:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-23 15:15:08,299 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-07-23 15:15:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:08,299 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-23 15:15:08,299 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:15:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-23 15:15:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:15:08,300 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:08,300 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 1, 1] [2018-07-23 15:15:08,301 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:15:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash -637959893, now seen corresponding path program 8 times [2018-07-23 15:15:08,301 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:10,152 WARN L169 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 33 [2018-07-23 15:15:11,261 WARN L169 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 382 DAG size of output: 41 [2018-07-23 15:15:11,466 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:11,466 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:11,534 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:12,686 WARN L169 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 423 DAG size of output: 92 [2018-07-23 15:15:13,016 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:14,168 WARN L169 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 423 DAG size of output: 92 [2018-07-23 15:15:16,336 WARN L169 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 549 DAG size of output: 117 [2018-07-23 15:15:16,609 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:16,609 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:16,610 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:19,025 WARN L169 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 546 DAG size of output: 110 [2018-07-23 15:15:21,372 WARN L169 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 466 DAG size of output: 127 [2018-07-23 15:15:23,427 WARN L169 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 466 DAG size of output: 143 [2018-07-23 15:15:24,111 WARN L169 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 102 [2018-07-23 15:15:25,075 WARN L169 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 96 [2018-07-23 15:15:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:25,278 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:25,278 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:15:25,278 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:15:25,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:15:25,279 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:15:25,280 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2018-07-23 15:15:25,586 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 72 [2018-07-23 15:15:25,924 WARN L169 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 102 [2018-07-23 15:15:26,337 WARN L169 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 120 [2018-07-23 15:15:26,492 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2018-07-23 15:15:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:26,522 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 15:15:26,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:15:26,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-07-23 15:15:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:26,523 INFO L225 Difference]: With dead ends: 22 [2018-07-23 15:15:26,523 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:15:26,524 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:15:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:15:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:15:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:15:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-23 15:15:26,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-07-23 15:15:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:26,546 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-23 15:15:26,546 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:15:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-23 15:15:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:15:26,548 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:26,548 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 1, 1] [2018-07-23 15:15:26,549 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:15:26,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1100872760, now seen corresponding path program 9 times [2018-07-23 15:15:26,549 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:28,111 WARN L169 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 49 [2018-07-23 15:15:28,769 WARN L169 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 42 [2018-07-23 15:15:29,214 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:29,402 WARN L169 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 62 [2018-07-23 15:15:29,901 WARN L169 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 59 [2018-07-23 15:15:30,591 WARN L169 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 89 [2018-07-23 15:15:31,251 WARN L169 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 93 [2018-07-23 15:15:32,215 WARN L169 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 117 [2018-07-23 15:15:33,203 WARN L169 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 129 [2018-07-23 15:15:33,886 WARN L169 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 87 [2018-07-23 15:15:34,556 WARN L169 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 90 [2018-07-23 15:15:35,483 WARN L169 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 105 [2018-07-23 15:15:36,293 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:36,294 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:36,463 WARN L169 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 102 [2018-07-23 15:15:36,759 WARN L169 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 64 [2018-07-23 15:15:37,116 WARN L169 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 60 [2018-07-23 15:15:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:15:37,295 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:15:37,295 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:15:37,296 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:15:37,296 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:15:37,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:15:37,297 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-07-23 15:15:37,514 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 92 [2018-07-23 15:15:37,691 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 88 [2018-07-23 15:15:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:15:37,988 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-23 15:15:37,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:15:37,989 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-07-23 15:15:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:15:37,989 INFO L225 Difference]: With dead ends: 24 [2018-07-23 15:15:37,989 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:15:37,990 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:15:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:15:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:15:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:15:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 15:15:38,011 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-07-23 15:15:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:15:38,011 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 15:15:38,012 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:15:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 15:15:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:15:38,012 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:15:38,013 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 1, 1] [2018-07-23 15:15:38,013 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:15:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1376774149, now seen corresponding path program 10 times [2018-07-23 15:15:38,013 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:15:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:15:43,865 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:43,909 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:44,583 WARN L169 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 724 DAG size of output: 44 [2018-07-23 15:15:45,367 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:45,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:45,601 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:45,649 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:45,688 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:45,693 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:45,702 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:45,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:45,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:46,372 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:46,667 WARN L169 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 558 DAG size of output: 56 [2018-07-23 15:15:46,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:46,992 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:46,994 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:47,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:48,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:48,549 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:48,551 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:48,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:48,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:49,116 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:15:49,543 WARN L169 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 808 DAG size of output: 71 [2018-07-23 15:15:53,520 WARN L169 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 975 DAG size of output: 104 [2018-07-23 15:15:57,840 WARN L169 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 975 DAG size of output: 115 [2018-07-23 15:16:00,172 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:16:00,179 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:16:02,949 WARN L169 SmtUtils]: Spent 4.86 s on a formula simplification. DAG size of input: 1059 DAG size of output: 153 [2018-07-23 15:16:10,053 WARN L169 SmtUtils]: Spent 6.85 s on a formula simplification. DAG size of input: 1110 DAG size of output: 199 [2018-07-23 15:16:13,239 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:16:13,240 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:16:16,191 WARN L169 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 1114 DAG size of output: 163 [2018-07-23 15:16:20,902 WARN L169 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 871 DAG size of output: 151 [2018-07-23 15:16:22,609 WARN L169 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 517 DAG size of output: 62 [2018-07-23 15:16:23,979 WARN L169 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 516 DAG size of output: 63 [2018-07-23 15:16:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:16:24,175 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:16:24,175 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:16:24,175 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:16:24,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:16:24,176 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:16:24,176 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 17 states. [2018-07-23 15:16:24,372 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 71 [2018-07-23 15:16:24,684 WARN L169 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 97 [2018-07-23 15:16:24,952 WARN L169 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 116 [2018-07-23 15:16:25,132 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 121 [2018-07-23 15:16:25,397 WARN L169 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 120 [2018-07-23 15:16:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:16:25,471 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-07-23 15:16:25,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:16:25,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-07-23 15:16:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:16:25,472 INFO L225 Difference]: With dead ends: 26 [2018-07-23 15:16:25,472 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:16:25,473 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:16:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:16:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:16:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:16:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-23 15:16:25,496 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-07-23 15:16:25,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:16:25,497 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-23 15:16:25,497 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:16:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-23 15:16:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:16:25,498 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:16:25,498 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 1, 1] [2018-07-23 15:16:25,498 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ElevatorErr0AssertViolationINVARIANTandASSERT]=== [2018-07-23 15:16:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash 230036626, now seen corresponding path program 11 times [2018-07-23 15:16:25,498 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:16:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:16:43,911 WARN L169 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 396 DAG size of output: 43 [2018-07-23 15:16:47,733 WARN L169 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 668 DAG size of output: 55 [2018-07-23 15:16:49,148 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:16:49,181 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:16:49,182 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:16:54,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:16:57,641 WARN L169 SmtUtils]: Spent 9.44 s on a formula simplification. DAG size of input: 1153 DAG size of output: 130 [2018-07-23 15:17:00,666 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:04,148 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:04,149 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:05,177 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:12,359 WARN L169 SmtUtils]: Spent 14.09 s on a formula simplification. DAG size of input: 1477 DAG size of output: 141 [2018-07-23 15:17:15,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:19,047 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:19,049 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:20,116 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:29,136 WARN L169 SmtUtils]: Spent 16.06 s on a formula simplification. DAG size of input: 1476 DAG size of output: 148 [2018-07-23 15:17:33,498 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:33,503 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:34,061 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:34,061 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:34,068 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:34,068 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:42,189 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:48,148 WARN L169 SmtUtils]: Spent 18.25 s on a formula simplification. DAG size of input: 1819 DAG size of output: 196 [2018-07-23 15:17:52,816 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:52,820 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:53,374 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:53,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:53,383 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:17:53,384 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:18:02,230 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:18:09,897 WARN L169 SmtUtils]: Spent 20.93 s on a formula simplification. DAG size of input: 1818 DAG size of output: 222 [2018-07-23 15:18:12,861 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:18:12,863 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:18:14,900 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:18:35,029 WARN L169 SmtUtils]: Spent 24.30 s on a formula simplification. DAG size of input: 1808 DAG size of output: 288 [2018-07-23 15:18:37,995 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:18:38,449 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:18:39,868 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-23 15:18:44,959 WARN L250 erpolLogProxyWrapper]: Already inconsistent. Received shutdown request... [2018-07-23 15:18:57,452 WARN L177 SmtUtils]: Removed 13 from assertion stack [2018-07-23 15:18:57,452 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:18:57,457 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:18:57,458 INFO L202 PluginConnector]: Adding new model ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:18:57 BoogieIcfgContainer [2018-07-23 15:18:57,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:18:57,459 INFO L168 Benchmark]: Toolchain (without parser) took 244569.23 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 224.7 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-07-23 15:18:57,460 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:18:57,460 INFO L168 Benchmark]: Boogie Preprocessor took 73.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:18:57,461 INFO L168 Benchmark]: RCFGBuilder took 919.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. [2018-07-23 15:18:57,461 INFO L168 Benchmark]: TraceAbstraction took 243568.10 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 192.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-07-23 15:18:57,465 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 919.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243568.10 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 192.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that loop invariant is valid and assertion always holds (line 48). Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 11, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 1807. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. TIMEOUT Result, 243.5s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 5.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 23 SDtfs, 168 SDslu, 1 SDs, 0 SdLazy, 212 SolverSat, 130 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 0 SyntacticMatches, 10 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 79.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=11, 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: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 84.6s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 287821 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/385 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ElevatorWithAssignments.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-18-57-481.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ElevatorWithAssignments.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-18-57-481.csv Completed graceful shutdown