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/ElevatorWithAssignments.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-e6fd87c [2018-07-25 08:36:02,771 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-25 08:36:02,773 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-25 08:36:02,785 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-25 08:36:02,785 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-25 08:36:02,786 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-25 08:36:02,787 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-25 08:36:02,789 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-25 08:36:02,791 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-25 08:36:02,792 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-25 08:36:02,793 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-25 08:36:02,793 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-25 08:36:02,794 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-25 08:36:02,795 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-25 08:36:02,796 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-25 08:36:02,797 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-25 08:36:02,798 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-25 08:36:02,802 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-25 08:36:02,804 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-25 08:36:02,808 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-25 08:36:02,811 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-25 08:36:02,816 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-25 08:36:02,820 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-25 08:36:02,835 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-07-25 08:36:02,864 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-25 08:36:02,865 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-25 08:36:02,866 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-25 08:36:02,866 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-25 08:36:02,867 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-25 08:36:02,867 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-25 08:36:02,867 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-25 08:36:02,867 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-25 08:36:02,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-25 08:36:02,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-25 08:36:02,944 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-25 08:36:02,945 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-25 08:36:02,946 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-25 08:36:02,947 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/ElevatorWithAssignments.bpl [2018-07-25 08:36:02,947 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/ElevatorWithAssignments.bpl' [2018-07-25 08:36:03,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-25 08:36:03,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-07-25 08:36:03,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-25 08:36:03,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-25 08:36:03,009 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-25 08:36:03,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,049 WARN L165 Inliner]: Program contained no entry procedure! [2018-07-25 08:36:03,049 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-07-25 08:36:03,049 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-07-25 08:36:03,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-25 08:36:03,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-25 08:36:03,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-25 08:36:03,053 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-25 08:36:03,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-25 08:36:03,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-25 08:36:03,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-25 08:36:03,084 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-25 08:36:03,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/1) ... [2018-07-25 08:36:03,180 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Elevator given in one single declaration [2018-07-25 08:36:03,181 INFO L130 BoogieDeclarations]: Found specification of procedure Elevator [2018-07-25 08:36:03,181 INFO L138 BoogieDeclarations]: Found implementation of procedure Elevator [2018-07-25 08:36:04,003 INFO L270 CfgBuilder]: Using library mode [2018-07-25 08:36:04,004 INFO L202 PluginConnector]: Adding new model ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 08:36:04 BoogieIcfgContainer [2018-07-25 08:36:04,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-25 08:36:04,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-25 08:36:04,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-25 08:36:04,009 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-25 08:36:04,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 08:36:02" (1/2) ... [2018-07-25 08:36:04,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e1e72f and model type ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.07 08:36:04, skipping insertion in model container [2018-07-25 08:36:04,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 08:36:04" (2/2) ... [2018-07-25 08:36:04,013 INFO L112 eAbstractionObserver]: Analyzing ICFG ElevatorWithAssignments.bpl [2018-07-25 08:36:04,023 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-25 08:36:04,032 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-25 08:36:04,068 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-25 08:36:04,069 INFO L374 AbstractCegarLoop]: Interprodecural is true [2018-07-25 08:36:04,069 INFO L375 AbstractCegarLoop]: Hoare is true [2018-07-25 08:36:04,069 INFO L376 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-25 08:36:04,070 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-25 08:36:04,070 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-25 08:36:04,070 INFO L379 AbstractCegarLoop]: Difference is false [2018-07-25 08:36:04,070 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-25 08:36:04,070 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-25 08:36:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-25 08:36:04,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-07-25 08:36:04,094 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,095 INFO L354 BasicCegarLoop]: trace histogram [1, 1] [2018-07-25 08:36:04,097 INFO L415 AbstractCegarLoop]: === Iteration 1 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2018-07-25 08:36:04,107 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:04,173 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 08:36:04,176 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 08:36:04,176 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-07-25 08:36:04,181 INFO L451 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-25 08:36:04,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-25 08:36:04,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-25 08:36:04,200 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-25 08:36:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:04,237 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-25 08:36:04,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-25 08:36:04,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-07-25 08:36:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:04,250 INFO L225 Difference]: With dead ends: 9 [2018-07-25 08:36:04,251 INFO L226 Difference]: Without dead ends: 6 [2018-07-25 08:36:04,254 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 08:36:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-25 08:36:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 5. [2018-07-25 08:36:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-25 08:36:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-25 08:36:04,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 2 [2018-07-25 08:36:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:04,298 INFO L472 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-25 08:36:04,298 INFO L473 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-25 08:36:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-25 08:36:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-25 08:36:04,299 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,299 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-25 08:36:04,300 INFO L415 AbstractCegarLoop]: === Iteration 2 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:04,300 INFO L82 PathProgramCache]: Analyzing trace with hash 932048, now seen corresponding path program 1 times [2018-07-25 08:36:04,300 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:04,349 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:04,349 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-25 08:36:04,353 INFO L451 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-25 08:36:04,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-25 08:36:04,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-07-25 08:36:04,354 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-07-25 08:36:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:04,426 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-07-25 08:36:04,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 08:36:04,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-07-25 08:36:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:04,429 INFO L225 Difference]: With dead ends: 8 [2018-07-25 08:36:04,429 INFO L226 Difference]: Without dead ends: 7 [2018-07-25 08:36:04,430 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-07-25 08:36:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-25 08:36:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-25 08:36:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-25 08:36:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-25 08:36:04,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-25 08:36:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:04,434 INFO L472 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-25 08:36:04,434 INFO L473 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-25 08:36:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-25 08:36:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-25 08:36:04,435 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,435 INFO L354 BasicCegarLoop]: trace histogram [2, 2, 1, 1] [2018-07-25 08:36:04,436 INFO L415 AbstractCegarLoop]: === Iteration 3 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:04,436 INFO L82 PathProgramCache]: Analyzing trace with hash 895704733, now seen corresponding path program 2 times [2018-07-25 08:36:04,436 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:04,517 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:04,517 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-25 08:36:04,518 INFO L451 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-25 08:36:04,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-25 08:36:04,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-25 08:36:04,519 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-07-25 08:36:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:04,567 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-25 08:36:04,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-25 08:36:04,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-07-25 08:36:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:04,568 INFO L225 Difference]: With dead ends: 11 [2018-07-25 08:36:04,568 INFO L226 Difference]: Without dead ends: 10 [2018-07-25 08:36:04,569 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-25 08:36:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-25 08:36:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-07-25 08:36:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-25 08:36:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-25 08:36:04,574 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-25 08:36:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:04,574 INFO L472 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-25 08:36:04,574 INFO L473 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-25 08:36:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-25 08:36:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-25 08:36:04,575 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,577 INFO L354 BasicCegarLoop]: trace histogram [3, 3, 1, 1] [2018-07-25 08:36:04,577 INFO L415 AbstractCegarLoop]: === Iteration 4 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1778795818, now seen corresponding path program 3 times [2018-07-25 08:36:04,578 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:04,881 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:04,882 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-25 08:36:04,882 INFO L451 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-25 08:36:04,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-25 08:36:04,883 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-25 08:36:04,883 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2018-07-25 08:36:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:04,952 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-25 08:36:04,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-25 08:36:04,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-07-25 08:36:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:04,953 INFO L225 Difference]: With dead ends: 13 [2018-07-25 08:36:04,954 INFO L226 Difference]: Without dead ends: 12 [2018-07-25 08:36:04,955 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-25 08:36:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-25 08:36:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-25 08:36:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-25 08:36:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-25 08:36:04,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-07-25 08:36:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:04,966 INFO L472 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-25 08:36:04,967 INFO L473 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-25 08:36:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-25 08:36:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-25 08:36:04,968 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:04,968 INFO L354 BasicCegarLoop]: trace histogram [4, 4, 1, 1] [2018-07-25 08:36:04,968 INFO L415 AbstractCegarLoop]: === Iteration 5 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash 25803895, now seen corresponding path program 4 times [2018-07-25 08:36:04,969 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:05,251 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:05,251 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-25 08:36:05,252 INFO L451 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-25 08:36:05,252 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-25 08:36:05,253 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-25 08:36:05,253 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2018-07-25 08:36:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:05,418 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-25 08:36:05,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-25 08:36:05,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-07-25 08:36:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:05,420 INFO L225 Difference]: With dead ends: 14 [2018-07-25 08:36:05,420 INFO L226 Difference]: Without dead ends: 13 [2018-07-25 08:36:05,421 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-07-25 08:36:05,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-25 08:36:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-25 08:36:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-25 08:36:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-25 08:36:05,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-07-25 08:36:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:05,437 INFO L472 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-25 08:36:05,437 INFO L473 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-25 08:36:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-25 08:36:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-25 08:36:05,438 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:05,442 INFO L354 BasicCegarLoop]: trace histogram [5, 5, 1, 1] [2018-07-25 08:36:05,443 INFO L415 AbstractCegarLoop]: === Iteration 6 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:05,443 INFO L82 PathProgramCache]: Analyzing trace with hash -972254076, now seen corresponding path program 5 times [2018-07-25 08:36:05,444 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:05,951 WARN L169 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2018-07-25 08:36:06,232 WARN L169 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 55 [2018-07-25 08:36:06,525 WARN L169 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 56 [2018-07-25 08:36:06,714 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2018-07-25 08:36:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:06,840 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:06,840 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-25 08:36:06,841 INFO L451 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-25 08:36:06,841 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-25 08:36:06,842 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-07-25 08:36:06,843 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-07-25 08:36:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:07,197 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-25 08:36:07,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-25 08:36:07,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2018-07-25 08:36:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:07,198 INFO L225 Difference]: With dead ends: 16 [2018-07-25 08:36:07,198 INFO L226 Difference]: Without dead ends: 15 [2018-07-25 08:36:07,199 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-07-25 08:36:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-25 08:36:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-25 08:36:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-25 08:36:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-25 08:36:07,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-07-25 08:36:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:07,209 INFO L472 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-25 08:36:07,209 INFO L473 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-25 08:36:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-25 08:36:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-25 08:36:07,210 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:07,210 INFO L354 BasicCegarLoop]: trace histogram [6, 6, 1, 1] [2018-07-25 08:36:07,211 INFO L415 AbstractCegarLoop]: === Iteration 7 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:07,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1966710097, now seen corresponding path program 6 times [2018-07-25 08:36:07,211 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:07,857 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 39 [2018-07-25 08:36:08,042 WARN L169 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2018-07-25 08:36:08,379 WARN L169 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 72 [2018-07-25 08:36:08,607 WARN L169 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 59 [2018-07-25 08:36:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:08,699 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:08,699 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-25 08:36:08,699 INFO L451 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-25 08:36:08,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-25 08:36:08,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2018-07-25 08:36:08,701 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2018-07-25 08:36:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:08,969 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-25 08:36:08,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-25 08:36:08,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2018-07-25 08:36:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:08,971 INFO L225 Difference]: With dead ends: 18 [2018-07-25 08:36:08,971 INFO L226 Difference]: Without dead ends: 17 [2018-07-25 08:36:08,971 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2018-07-25 08:36:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-25 08:36:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-25 08:36:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-25 08:36:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-25 08:36:08,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-07-25 08:36:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:08,986 INFO L472 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-25 08:36:08,986 INFO L473 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-25 08:36:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-25 08:36:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-25 08:36:08,987 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:08,987 INFO L354 BasicCegarLoop]: trace histogram [7, 7, 1, 1] [2018-07-25 08:36:08,987 INFO L415 AbstractCegarLoop]: === Iteration 8 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:08,989 INFO L82 PathProgramCache]: Analyzing trace with hash 222799582, now seen corresponding path program 7 times [2018-07-25 08:36:08,990 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:11,852 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:12,076 WARN L169 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 334 DAG size of output: 43 [2018-07-25 08:36:13,913 WARN L169 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 486 DAG size of output: 65 [2018-07-25 08:36:15,411 WARN L169 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 372 DAG size of output: 95 [2018-07-25 08:36:16,154 WARN L169 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 82 [2018-07-25 08:36:16,960 WARN L169 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 88 [2018-07-25 08:36:17,269 WARN L169 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 69 [2018-07-25 08:36:17,682 WARN L169 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 81 [2018-07-25 08:36:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:17,834 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:17,834 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-25 08:36:17,836 INFO L451 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-25 08:36:17,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-25 08:36:17,836 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-07-25 08:36:17,837 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2018-07-25 08:36:18,020 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 44 [2018-07-25 08:36:18,190 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2018-07-25 08:36:18,424 WARN L169 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2018-07-25 08:36:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:18,581 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-25 08:36:18,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-25 08:36:18,582 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-07-25 08:36:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:18,584 INFO L225 Difference]: With dead ends: 20 [2018-07-25 08:36:18,584 INFO L226 Difference]: Without dead ends: 19 [2018-07-25 08:36:18,587 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2018-07-25 08:36:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-25 08:36:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-25 08:36:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-25 08:36:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-25 08:36:18,604 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-07-25 08:36:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:18,604 INFO L472 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-25 08:36:18,604 INFO L473 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-25 08:36:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-25 08:36:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-25 08:36:18,605 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:18,605 INFO L354 BasicCegarLoop]: trace histogram [8, 8, 1, 1] [2018-07-25 08:36:18,606 INFO L415 AbstractCegarLoop]: === Iteration 9 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash -637959893, now seen corresponding path program 8 times [2018-07-25 08:36:18,608 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-25 08:36:21,871 WARN L169 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 469 DAG size of output: 46 [2018-07-25 08:36:23,194 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:24,208 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:24,234 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:24,355 WARN L169 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 666 DAG size of output: 64 [2018-07-25 08:36:26,302 WARN L169 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 523 DAG size of output: 136 [2018-07-25 08:36:28,054 WARN L169 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 522 DAG size of output: 136 [2018-07-25 08:36:30,146 WARN L169 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 522 DAG size of output: 146 [2018-07-25 08:36:30,761 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:31,221 WARN L169 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 97 [2018-07-25 08:36:31,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:31,787 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:32,095 WARN L169 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 107 [2018-07-25 08:36:32,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:32,526 WARN L169 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 78 [2018-07-25 08:36:33,214 WARN L169 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 91 [2018-07-25 08:36:33,397 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-25 08:36:33,461 WARN L169 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 41 [2018-07-25 08:36:33,765 WARN L169 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 20 [2018-07-25 08:36:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-25 08:36:33,824 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-25 08:36:33,825 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-25 08:36:33,825 INFO L451 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-25 08:36:33,825 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-25 08:36:33,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2018-07-25 08:36:33,826 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2018-07-25 08:36:34,135 WARN L169 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 109 [2018-07-25 08:36:34,665 WARN L169 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 119 [2018-07-25 08:36:34,849 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 74 [2018-07-25 08:36:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 08:36:34,971 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-25 08:36:34,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-25 08:36:34,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-07-25 08:36:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 08:36:34,972 INFO L225 Difference]: With dead ends: 22 [2018-07-25 08:36:34,972 INFO L226 Difference]: Without dead ends: 21 [2018-07-25 08:36:34,974 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2018-07-25 08:36:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-25 08:36:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-25 08:36:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-25 08:36:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-25 08:36:34,995 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-07-25 08:36:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 08:36:34,995 INFO L472 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-25 08:36:34,996 INFO L473 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-25 08:36:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-25 08:36:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-25 08:36:34,999 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 08:36:34,999 INFO L354 BasicCegarLoop]: trace histogram [9, 9, 1, 1] [2018-07-25 08:36:34,999 INFO L415 AbstractCegarLoop]: === Iteration 10 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-07-25 08:36:34,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1100872760, now seen corresponding path program 9 times [2018-07-25 08:36:35,000 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 08:36:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown