java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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-ff8eab6 [2018-09-26 08:06:04,171 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 08:06:04,173 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 08:06:04,186 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 08:06:04,186 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 08:06:04,187 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 08:06:04,189 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 08:06:04,191 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 08:06:04,193 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 08:06:04,193 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 08:06:04,194 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 08:06:04,221 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-09-26 08:06:04,230 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 08:06:04,230 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 08:06:04,232 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 08:06:04,232 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-09-26 08:06:04,232 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 08:06:04,232 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-09-26 08:06:04,233 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-09-26 08:06:04,233 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 08:06:04,283 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 08:06:04,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 08:06:04,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 08:06:04,311 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 08:06:04,312 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 08:06:04,312 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/ElevatorWithAssignments.bpl [2018-09-26 08:06:04,313 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/ElevatorWithAssignments.bpl' [2018-09-26 08:06:04,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 08:06:04,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 08:06:04,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 08:06:04,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 08:06:04,404 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 08:06:04,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,456 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 08:06:04,456 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 08:06:04,457 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 08:06:04,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 08:06:04,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 08:06:04,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 08:06:04,461 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 08:06:04,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 08:06:04,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 08:06:04,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 08:06:04,509 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 08:06:04,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/1) ... [2018-09-26 08:06:04,614 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Elevator given in one single declaration [2018-09-26 08:06:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure Elevator [2018-09-26 08:06:04,615 INFO L138 BoogieDeclarations]: Found implementation of procedure Elevator [2018-09-26 08:06:05,538 INFO L343 CfgBuilder]: Using library mode [2018-09-26 08:06:05,538 INFO L202 PluginConnector]: Adding new model ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 08:06:05 BoogieIcfgContainer [2018-09-26 08:06:05,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 08:06:05,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 08:06:05,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 08:06:05,545 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 08:06:05,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:06:04" (1/2) ... [2018-09-26 08:06:05,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@266113af and model type ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 08:06:05, skipping insertion in model container [2018-09-26 08:06:05,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 08:06:05" (2/2) ... [2018-09-26 08:06:05,549 INFO L112 eAbstractionObserver]: Analyzing ICFG ElevatorWithAssignments.bpl [2018-09-26 08:06:05,559 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-09-26 08:06:05,571 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 08:06:05,617 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 08:06:05,618 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 08:06:05,618 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 08:06:05,618 INFO L383 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-09-26 08:06:05,618 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 08:06:05,618 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 08:06:05,619 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 08:06:05,619 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 08:06:05,619 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 08:06:05,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-26 08:06:05,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-26 08:06:05,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:05,643 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-26 08:06:05,645 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:05,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2018-09-26 08:06:05,658 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:05,744 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 08:06:05,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 08:06:05,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 08:06:05,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 08:06:05,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 08:06:05,773 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-26 08:06:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:05,831 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 08:06:05,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 08:06:05,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-26 08:06:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:05,858 INFO L225 Difference]: With dead ends: 9 [2018-09-26 08:06:05,858 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 08:06:05,863 INFO L605 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 [2018-09-26 08:06:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 08:06:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 5. [2018-09-26 08:06:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 08:06:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 08:06:05,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 2 [2018-09-26 08:06:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:05,921 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 08:06:05,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 08:06:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 08:06:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 08:06:05,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:05,922 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 08:06:05,922 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:05,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash 932048, now seen corresponding path program 1 times [2018-09-26 08:06:05,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:05,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:05,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-26 08:06:05,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 08:06:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 08:06:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 08:06:05,995 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-26 08:06:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:06,029 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 08:06:06,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 08:06:06,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-26 08:06:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:06,030 INFO L225 Difference]: With dead ends: 8 [2018-09-26 08:06:06,031 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 08:06:06,035 INFO L605 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 [2018-09-26 08:06:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 08:06:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 08:06:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 08:06:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 08:06:06,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 08:06:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:06,044 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 08:06:06,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 08:06:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 08:06:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 08:06:06,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:06,046 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1] [2018-09-26 08:06:06,046 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:06,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:06,047 INFO L82 PathProgramCache]: Analyzing trace with hash 895704733, now seen corresponding path program 2 times [2018-09-26 08:06:06,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:06,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:06,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-26 08:06:06,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 08:06:06,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 08:06:06,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 08:06:06,166 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-09-26 08:06:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:06,236 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 08:06:06,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 08:06:06,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-09-26 08:06:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:06,237 INFO L225 Difference]: With dead ends: 11 [2018-09-26 08:06:06,238 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 08:06:06,238 INFO L605 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 [2018-09-26 08:06:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 08:06:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-26 08:06:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 08:06:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 08:06:06,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 08:06:06,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:06,250 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 08:06:06,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 08:06:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 08:06:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 08:06:06,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:06,252 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1] [2018-09-26 08:06:06,252 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:06,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:06,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1778795818, now seen corresponding path program 3 times [2018-09-26 08:06:06,254 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:06,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:06,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-26 08:06:06,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 08:06:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 08:06:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 08:06:06,574 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2018-09-26 08:06:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:06,646 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 08:06:06,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 08:06:06,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-26 08:06:06,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:06,649 INFO L225 Difference]: With dead ends: 13 [2018-09-26 08:06:06,649 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 08:06:06,652 INFO L605 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 [2018-09-26 08:06:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 08:06:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-09-26 08:06:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 08:06:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 08:06:06,659 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 08:06:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:06,660 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 08:06:06,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 08:06:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 08:06:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 08:06:06,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:06,661 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1] [2018-09-26 08:06:06,661 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:06,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash 25803895, now seen corresponding path program 4 times [2018-09-26 08:06:06,662 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:07,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:07,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-26 08:06:07,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 08:06:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 08:06:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-26 08:06:07,094 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2018-09-26 08:06:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:07,266 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 08:06:07,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 08:06:07,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-26 08:06:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:07,268 INFO L225 Difference]: With dead ends: 14 [2018-09-26 08:06:07,268 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 08:06:07,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-09-26 08:06:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 08:06:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 08:06:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 08:06:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 08:06:07,280 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 08:06:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:07,280 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 08:06:07,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 08:06:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 08:06:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 08:06:07,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:07,282 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1] [2018-09-26 08:06:07,282 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:07,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:07,283 INFO L82 PathProgramCache]: Analyzing trace with hash -972254076, now seen corresponding path program 5 times [2018-09-26 08:06:07,283 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:07,866 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2018-09-26 08:06:08,220 WARN L178 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 55 [2018-09-26 08:06:08,518 WARN L178 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 56 [2018-09-26 08:06:08,686 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2018-09-26 08:06:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:08,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:08,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-26 08:06:08,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 08:06:08,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 08:06:08,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-09-26 08:06:08,812 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-09-26 08:06:09,122 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2018-09-26 08:06:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:09,219 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 08:06:09,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 08:06:09,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2018-09-26 08:06:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:09,222 INFO L225 Difference]: With dead ends: 16 [2018-09-26 08:06:09,222 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 08:06:09,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-09-26 08:06:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 08:06:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 08:06:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 08:06:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 08:06:09,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-26 08:06:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:09,235 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 08:06:09,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 08:06:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 08:06:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 08:06:09,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:09,238 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1] [2018-09-26 08:06:09,238 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:09,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:09,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1966710097, now seen corresponding path program 6 times [2018-09-26 08:06:09,239 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:09,882 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 39 [2018-09-26 08:06:10,086 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2018-09-26 08:06:10,471 WARN L178 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 72 [2018-09-26 08:06:10,733 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 59 [2018-09-26 08:06:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:10,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:10,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-26 08:06:10,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 08:06:10,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 08:06:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2018-09-26 08:06:10,852 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2018-09-26 08:06:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:11,158 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 08:06:11,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 08:06:11,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2018-09-26 08:06:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:11,160 INFO L225 Difference]: With dead ends: 18 [2018-09-26 08:06:11,160 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 08:06:11,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2018-09-26 08:06:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 08:06:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 08:06:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 08:06:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 08:06:11,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-26 08:06:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:11,181 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 08:06:11,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 08:06:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 08:06:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 08:06:11,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:11,184 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1] [2018-09-26 08:06:11,185 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:11,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:11,185 INFO L82 PathProgramCache]: Analyzing trace with hash 222799582, now seen corresponding path program 7 times [2018-09-26 08:06:11,185 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:14,186 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:14,434 WARN L178 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 334 DAG size of output: 43 [2018-09-26 08:06:16,285 WARN L178 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 486 DAG size of output: 65 [2018-09-26 08:06:17,687 WARN L178 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 372 DAG size of output: 95 [2018-09-26 08:06:18,409 WARN L178 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 82 [2018-09-26 08:06:19,138 WARN L178 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 88 [2018-09-26 08:06:19,432 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 69 [2018-09-26 08:06:19,828 WARN L178 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 81 [2018-09-26 08:06:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:19,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:19,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-26 08:06:19,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 08:06:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 08:06:19,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-09-26 08:06:19,985 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2018-09-26 08:06:20,154 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 44 [2018-09-26 08:06:20,329 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2018-09-26 08:06:20,566 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2018-09-26 08:06:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:20,739 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 08:06:20,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 08:06:20,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-09-26 08:06:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:20,740 INFO L225 Difference]: With dead ends: 20 [2018-09-26 08:06:20,740 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 08:06:20,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2018-09-26 08:06:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 08:06:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 08:06:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 08:06:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 08:06:20,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-26 08:06:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:20,758 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 08:06:20,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 08:06:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 08:06:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 08:06:20,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:20,759 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1] [2018-09-26 08:06:20,760 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:20,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash -637959893, now seen corresponding path program 8 times [2018-09-26 08:06:20,761 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:23,989 WARN L178 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 469 DAG size of output: 46 [2018-09-26 08:06:25,281 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:26,410 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:26,441 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:26,576 WARN L178 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 666 DAG size of output: 64 [2018-09-26 08:06:28,659 WARN L178 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 523 DAG size of output: 136 [2018-09-26 08:06:30,560 WARN L178 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 522 DAG size of output: 136 [2018-09-26 08:06:32,653 WARN L178 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 522 DAG size of output: 146 [2018-09-26 08:06:33,285 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:33,735 WARN L178 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 97 [2018-09-26 08:06:34,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:34,317 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:34,741 WARN L178 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 107 [2018-09-26 08:06:35,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:35,346 WARN L178 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 78 [2018-09-26 08:06:36,200 WARN L178 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 91 [2018-09-26 08:06:36,447 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:36,509 WARN L178 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 41 [2018-09-26 08:06:36,812 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 20 [2018-09-26 08:06:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:36,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:36,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-26 08:06:36,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 08:06:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 08:06:36,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2018-09-26 08:06:36,882 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2018-09-26 08:06:37,110 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 109 [2018-09-26 08:06:37,584 WARN L178 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 119 [2018-09-26 08:06:37,739 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 74 [2018-09-26 08:06:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:37,858 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 08:06:37,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 08:06:37,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-26 08:06:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:37,859 INFO L225 Difference]: With dead ends: 22 [2018-09-26 08:06:37,859 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 08:06:37,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2018-09-26 08:06:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 08:06:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 08:06:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 08:06:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 08:06:37,880 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-26 08:06:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:37,880 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 08:06:37,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 08:06:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 08:06:37,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 08:06:37,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:37,881 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1] [2018-09-26 08:06:37,882 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:37,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1100872760, now seen corresponding path program 9 times [2018-09-26 08:06:37,882 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:38,982 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 36 [2018-09-26 08:06:39,269 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 40 [2018-09-26 08:06:39,567 WARN L178 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 40 [2018-09-26 08:06:39,725 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:40,299 WARN L178 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 87 [2018-09-26 08:06:41,309 WARN L178 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 75 [2018-09-26 08:06:42,089 WARN L178 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 71 [2018-09-26 08:06:42,808 WARN L178 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 75 [2018-09-26 08:06:43,461 WARN L178 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 87 [2018-09-26 08:06:43,703 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:43,704 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:43,875 WARN L178 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 77 [2018-09-26 08:06:44,175 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:44,176 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:44,289 WARN L178 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 72 [2018-09-26 08:06:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:06:44,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:06:44,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-26 08:06:44,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 08:06:44,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 08:06:44,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-09-26 08:06:44,430 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 16 states. [2018-09-26 08:06:44,760 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2018-09-26 08:06:45,057 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 82 [2018-09-26 08:06:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:06:45,228 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 08:06:45,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 08:06:45,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2018-09-26 08:06:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:06:45,229 INFO L225 Difference]: With dead ends: 24 [2018-09-26 08:06:45,229 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 08:06:45,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2018-09-26 08:06:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 08:06:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 08:06:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 08:06:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 08:06:45,261 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-26 08:06:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:06:45,262 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 08:06:45,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 08:06:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 08:06:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 08:06:45,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:06:45,263 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1] [2018-09-26 08:06:45,263 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:06:45,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:06:45,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1376774149, now seen corresponding path program 10 times [2018-09-26 08:06:45,264 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:06:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:06:48,660 WARN L178 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 41 [2018-09-26 08:06:50,086 WARN L178 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 506 DAG size of output: 49 [2018-09-26 08:06:50,446 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:53,216 WARN L178 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 740 DAG size of output: 87 [2018-09-26 08:06:53,413 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:55,756 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,051 WARN L178 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 739 DAG size of output: 94 [2018-09-26 08:06:56,372 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,372 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,372 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:56,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,485 WARN L178 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 868 DAG size of output: 115 [2018-09-26 08:06:59,761 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,761 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,761 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,762 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,762 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,763 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,763 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,899 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,900 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:06:59,900 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:02,904 WARN L178 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 866 DAG size of output: 152 [2018-09-26 08:07:05,895 WARN L178 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 878 DAG size of output: 101 [2018-09-26 08:07:06,254 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:06,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:06,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:06,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:09,357 WARN L178 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 872 DAG size of output: 176 [2018-09-26 08:07:12,881 WARN L178 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 733 DAG size of output: 219 [2018-09-26 08:07:16,268 WARN L178 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 733 DAG size of output: 248 [2018-09-26 08:07:20,018 WARN L178 SmtUtils]: Spent 3.58 s on a formula simplification. DAG size of input: 793 DAG size of output: 220 [2018-09-26 08:07:24,450 WARN L178 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 797 DAG size of output: 234 [2018-09-26 08:07:25,558 WARN L178 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 73 [2018-09-26 08:07:26,584 WARN L178 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 65 [2018-09-26 08:07:26,867 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 30 [2018-09-26 08:07:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:07:26,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:07:26,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-26 08:07:26,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 08:07:26,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 08:07:26,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2018-09-26 08:07:26,941 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2018-09-26 08:07:27,202 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 42 [2018-09-26 08:07:27,420 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 50 [2018-09-26 08:07:28,264 WARN L178 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 77 [2018-09-26 08:07:29,376 WARN L178 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 455 DAG size of output: 127 [2018-09-26 08:07:30,279 WARN L178 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 111 [2018-09-26 08:07:31,976 WARN L178 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 331 DAG size of output: 251 [2018-09-26 08:07:32,884 WARN L178 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 186 [2018-09-26 08:07:32,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:07:32,976 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 08:07:32,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 08:07:32,977 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2018-09-26 08:07:32,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:07:32,977 INFO L225 Difference]: With dead ends: 26 [2018-09-26 08:07:32,978 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 08:07:32,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2018-09-26 08:07:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 08:07:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 08:07:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 08:07:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 08:07:33,021 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-26 08:07:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:07:33,021 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 08:07:33,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 08:07:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 08:07:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 08:07:33,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:07:33,023 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1] [2018-09-26 08:07:33,023 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ElevatorErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2018-09-26 08:07:33,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:07:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash 230036626, now seen corresponding path program 11 times [2018-09-26 08:07:33,026 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:07:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:07:39,261 WARN L178 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 43 [2018-09-26 08:07:40,337 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:40,346 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:40,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:40,939 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:42,549 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:42,670 WARN L178 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 765 DAG size of output: 61 [2018-09-26 08:07:44,672 WARN L178 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 767 DAG size of output: 60 [2018-09-26 08:07:49,130 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:49,143 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:49,403 WARN L178 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 1359 DAG size of output: 92 [2018-09-26 08:07:50,753 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:51,484 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:51,484 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:52,644 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:53,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:54,605 WARN L178 SmtUtils]: Spent 4.88 s on a formula simplification. DAG size of input: 1359 DAG size of output: 91 [2018-09-26 08:07:56,182 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:07:58,897 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:02,130 WARN L178 SmtUtils]: Spent 7.16 s on a formula simplification. DAG size of input: 1534 DAG size of output: 108 [2018-09-26 08:08:03,651 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:10,915 WARN L178 SmtUtils]: Spent 8.38 s on a formula simplification. DAG size of input: 1533 DAG size of output: 147 [2018-09-26 08:08:11,897 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:13,438 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:14,635 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:14,636 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:14,636 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:18,150 WARN L178 SmtUtils]: Spent 6.83 s on a formula simplification. DAG size of input: 1594 DAG size of output: 148 [2018-09-26 08:08:21,388 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:22,758 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:22,759 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:22,759 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:27,438 WARN L178 SmtUtils]: Spent 8.85 s on a formula simplification. DAG size of input: 1595 DAG size of output: 155 [2018-09-26 08:08:32,231 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:51,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:51,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:08:53,057 WARN L178 SmtUtils]: Spent 24.24 s on a formula simplification. DAG size of input: 3071 DAG size of output: 203 [2018-09-26 08:09:11,292 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:11,295 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:11,295 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:19,906 WARN L178 SmtUtils]: Spent 25.30 s on a formula simplification. DAG size of input: 3226 DAG size of output: 238 [2018-09-26 08:09:24,742 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:24,743 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:24,743 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:26,387 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:28,235 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:28,246 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:42,451 WARN L178 SmtUtils]: Spent 21.25 s on a formula simplification. DAG size of input: 2518 DAG size of output: 173 [2018-09-26 08:09:46,025 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:46,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:46,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:46,398 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:46,406 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:46,407 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:46,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:46,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:48,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:50,830 WARN L178 SmtUtils]: Spent 7.94 s on a formula simplification. DAG size of input: 1429 DAG size of output: 196 [2018-09-26 08:09:52,829 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:53,878 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:59,047 WARN L178 SmtUtils]: Spent 7.80 s on a formula simplification. DAG size of input: 1422 DAG size of output: 197 [2018-09-26 08:09:59,393 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:09:59,626 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:00,187 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:01,815 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:01,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:01,907 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:01,914 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:01,924 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:01,988 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:01,989 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:01,989 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:02,524 WARN L178 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 722 DAG size of output: 79 [2018-09-26 08:10:02,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:03,619 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:04,777 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:05,112 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:05,113 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 08:10:05,174 WARN L178 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 725 DAG size of output: 55 [2018-09-26 08:10:05,456 WARN L178 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 23 [2018-09-26 08:10:05,750 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 29 [2018-09-26 08:10:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:10:05,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:10:05,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-26 08:10:05,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 08:10:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 08:10:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2018-09-26 08:10:05,842 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2018-09-26 08:10:06,250 WARN L178 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 80 [2018-09-26 08:10:06,889 WARN L178 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 102 [2018-09-26 08:10:07,534 WARN L178 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 130 Received shutdown request... [2018-09-26 08:10:08,273 WARN L186 SmtUtils]: Removed 2 from assertion stack [2018-09-26 08:10:08,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 08:10:08,273 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 08:10:08,278 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 08:10:08,279 INFO L202 PluginConnector]: Adding new model ElevatorWithAssignments.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 08:10:08 BoogieIcfgContainer [2018-09-26 08:10:08,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 08:10:08,280 INFO L168 Benchmark]: Toolchain (without parser) took 243880.16 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 2.1 GB in the end (delta: -631.5 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-09-26 08:10:08,281 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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. [2018-09-26 08:10:08,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.25 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. [2018-09-26 08:10:08,282 INFO L168 Benchmark]: Boogie Preprocessor took 47.51 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. [2018-09-26 08:10:08,283 INFO L168 Benchmark]: RCFGBuilder took 1030.57 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-26 08:10:08,283 INFO L168 Benchmark]: TraceAbstraction took 242739.19 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 2.1 GB in the end (delta: -673.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-26 08:10:08,287 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 0.19 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 Procedure Inliner took 56.25 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 47.51 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 1030.57 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242739.19 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 2.1 GB in the end (delta: -673.8 MB). Peak memory consumption was 1.3 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 constructing difference of abstraction (25states) and FLOYD_HOARE automaton (currently 8 states, 22 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 391. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. TIMEOUT Result, 242.6s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 12.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 199 SDslu, 2 SDs, 0 SdLazy, 240 SolverSat, 153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 12 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 220.0s 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: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 227.6s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 844121 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 0/506 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_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_08-10-08-299.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ElevatorWithAssignments.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_08-10-08-299.csv Completed graceful shutdown