java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:30:09,151 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:30:09,153 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:30:09,165 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-07-23 15:30:09,198 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf [2018-07-23 15:30:09,213 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:30:09,213 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:30:09,215 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:30:09,215 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:30:09,215 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:30:09,215 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:30:09,216 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:30:09,216 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:30:09,260 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:30:09,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:30:09,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:30:09,279 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:30:09,280 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:30:09,281 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl [2018-07-23 15:30:09,281 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl' [2018-07-23 15:30:09,332 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:30:09,334 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:30:09,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:30:09,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:30:09,335 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:30:09,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/1) ... [2018-07-23 15:30:09,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/1) ... [2018-07-23 15:30:09,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/1) ... [2018-07-23 15:30:09,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/1) ... [2018-07-23 15:30:09,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/1) ... [2018-07-23 15:30:09,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/1) ... [2018-07-23 15:30:09,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/1) ... [2018-07-23 15:30:09,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:30:09,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:30:09,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:30:09,398 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:30:09,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/1) ... [2018-07-23 15:30:09,496 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-07-23 15:30:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-23 15:30:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-23 15:30:09,748 INFO L258 CfgBuilder]: Using library mode [2018-07-23 15:30:09,749 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:30:09 BoogieIcfgContainer [2018-07-23 15:30:09,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:30:09,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:30:09,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:30:09,759 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:30:09,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:30:09" (1/2) ... [2018-07-23 15:30:09,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3095c9 and model type Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:30:09, skipping insertion in model container [2018-07-23 15:30:09,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:30:09" (2/2) ... [2018-07-23 15:30:09,764 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-ArraysIntegefied.bpl [2018-07-23 15:30:09,773 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:30:09,782 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:30:09,827 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:30:09,828 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:30:09,828 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:30:09,828 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:30:09,829 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:30:09,829 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:30:09,829 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:30:09,829 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:30:09,829 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:30:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-23 15:30:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 15:30:09,852 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:09,853 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 15:30:09,853 INFO L414 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash 73132, now seen corresponding path program 1 times [2018-07-23 15:30:09,865 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:09,937 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:30:09,937 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:30:09,942 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:30:09,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:30:09,958 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:30:09,961 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-07-23 15:30:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:09,987 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-07-23 15:30:09,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:30:09,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-23 15:30:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:09,999 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:30:10,000 INFO L226 Difference]: Without dead ends: 5 [2018-07-23 15:30:10,003 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:30:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-07-23 15:30:10,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-07-23 15:30:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-23 15:30:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-23 15:30:10,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-07-23 15:30:10,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,039 INFO L471 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-23 15:30:10,040 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:30:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-23 15:30:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:30:10,041 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,041 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:30:10,041 INFO L414 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2282471, now seen corresponding path program 1 times [2018-07-23 15:30:10,042 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,085 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,086 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:30:10,088 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:30:10,088 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:30:10,088 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:30:10,089 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-07-23 15:30:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,108 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-07-23 15:30:10,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:30:10,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 15:30:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,109 INFO L225 Difference]: With dead ends: 8 [2018-07-23 15:30:10,109 INFO L226 Difference]: Without dead ends: 6 [2018-07-23 15:30:10,110 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:30:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-23 15:30:10,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-23 15:30:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 15:30:10,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-23 15:30:10,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-07-23 15:30:10,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,113 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-23 15:30:10,114 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:30:10,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-23 15:30:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:30:10,114 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,114 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-23 15:30:10,115 INFO L414 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash 70771980, now seen corresponding path program 2 times [2018-07-23 15:30:10,115 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,188 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,188 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:30:10,189 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:30:10,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:30:10,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:30:10,190 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-07-23 15:30:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,212 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:30:10,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:30:10,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-07-23 15:30:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,213 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:30:10,213 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:30:10,214 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:30:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:30:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:30:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:30:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:30:10,218 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-07-23 15:30:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,219 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:30:10,219 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:30:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:30:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:30:10,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,220 INFO L353 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-07-23 15:30:10,220 INFO L414 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2101020537, now seen corresponding path program 3 times [2018-07-23 15:30:10,221 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,349 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,349 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:30:10,350 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:30:10,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:30:10,350 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:30:10,351 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-07-23 15:30:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,368 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-07-23 15:30:10,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:30:10,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-07-23 15:30:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,370 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:30:10,370 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:30:10,371 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:30:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:30:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-23 15:30:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 15:30:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-23 15:30:10,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-07-23 15:30:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,374 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-23 15:30:10,375 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:30:10,375 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-23 15:30:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 15:30:10,375 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,375 INFO L353 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-07-23 15:30:10,376 INFO L414 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,376 INFO L82 PathProgramCache]: Analyzing trace with hash -707111828, now seen corresponding path program 4 times [2018-07-23 15:30:10,376 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,527 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,527 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:30:10,527 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:30:10,527 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:30:10,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:30:10,528 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-07-23 15:30:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,541 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:30:10,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:30:10,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-07-23 15:30:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,542 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:30:10,542 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:30:10,543 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:30:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:30:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:30:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:30:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:30:10,546 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-07-23 15:30:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,547 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:30:10,547 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:30:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:30:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:30:10,547 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,548 INFO L353 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-07-23 15:30:10,548 INFO L414 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,548 INFO L82 PathProgramCache]: Analyzing trace with hash -445614809, now seen corresponding path program 5 times [2018-07-23 15:30:10,549 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,649 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,649 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:30:10,649 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:30:10,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:30:10,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:30:10,652 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-07-23 15:30:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,680 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-23 15:30:10,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:30:10,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-07-23 15:30:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,682 INFO L225 Difference]: With dead ends: 12 [2018-07-23 15:30:10,682 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 15:30:10,685 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:30:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 15:30:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-23 15:30:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 15:30:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-23 15:30:10,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-07-23 15:30:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,694 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-23 15:30:10,694 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:30:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-23 15:30:10,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 15:30:10,695 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,695 INFO L353 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-07-23 15:30:10,695 INFO L414 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,696 INFO L82 PathProgramCache]: Analyzing trace with hash -929141812, now seen corresponding path program 6 times [2018-07-23 15:30:10,696 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,817 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,817 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:30:10,818 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:30:10,818 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:30:10,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:30:10,819 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-07-23 15:30:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,834 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:30:10,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:30:10,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-07-23 15:30:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,835 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:30:10,837 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:30:10,838 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:30:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:30:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:30:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:30:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:30:10,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-07-23 15:30:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,843 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:30:10,843 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:30:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:30:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:30:10,844 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,844 INFO L353 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-07-23 15:30:10,844 INFO L414 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1261390279, now seen corresponding path program 7 times [2018-07-23 15:30:10,844 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:10,940 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:10,940 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:30:10,940 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:30:10,941 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:30:10,941 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:30:10,941 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-07-23 15:30:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:10,955 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 15:30:10,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:30:10,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-07-23 15:30:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:10,956 INFO L225 Difference]: With dead ends: 14 [2018-07-23 15:30:10,956 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 15:30:10,957 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:30:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 15:30:10,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-23 15:30:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 15:30:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-23 15:30:10,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-07-23 15:30:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:10,961 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-23 15:30:10,962 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:30:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-23 15:30:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 15:30:10,962 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:10,963 INFO L353 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-07-23 15:30:10,963 INFO L414 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:10,963 INFO L82 PathProgramCache]: Analyzing trace with hash 448408364, now seen corresponding path program 8 times [2018-07-23 15:30:10,963 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,061 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,061 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:30:11,062 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:30:11,062 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:30:11,062 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:30:11,066 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-07-23 15:30:11,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,090 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-23 15:30:11,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:30:11,093 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-07-23 15:30:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,094 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:30:11,094 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:30:11,095 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:30:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:30:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:30:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:30:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-23 15:30:11,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-07-23 15:30:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,108 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-23 15:30:11,108 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:30:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-23 15:30:11,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:30:11,109 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,109 INFO L353 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-07-23 15:30:11,110 INFO L414 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1015772775, now seen corresponding path program 9 times [2018-07-23 15:30:11,114 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,253 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,253 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:30:11,254 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:30:11,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:30:11,259 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:30:11,260 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-07-23 15:30:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,287 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-07-23 15:30:11,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:30:11,287 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-07-23 15:30:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,292 INFO L225 Difference]: With dead ends: 16 [2018-07-23 15:30:11,293 INFO L226 Difference]: Without dead ends: 14 [2018-07-23 15:30:11,293 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:30:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-23 15:30:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-23 15:30:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-23 15:30:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-23 15:30:11,300 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-07-23 15:30:11,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,301 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-23 15:30:11,301 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:30:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-23 15:30:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-23 15:30:11,303 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,304 INFO L353 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-07-23 15:30:11,304 INFO L414 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1424200332, now seen corresponding path program 10 times [2018-07-23 15:30:11,304 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,410 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,411 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:30:11,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:30:11,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:30:11,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:30:11,412 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-07-23 15:30:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,424 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-23 15:30:11,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:30:11,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-07-23 15:30:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,425 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:30:11,426 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:30:11,426 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:30:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:30:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:30:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:30:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-23 15:30:11,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-07-23 15:30:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,431 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-23 15:30:11,431 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:30:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-23 15:30:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:30:11,432 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,432 INFO L353 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-07-23 15:30:11,432 INFO L414 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1200552711, now seen corresponding path program 11 times [2018-07-23 15:30:11,433 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,572 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,572 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:30:11,572 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:30:11,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:30:11,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:30:11,573 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-07-23 15:30:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,590 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-07-23 15:30:11,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:30:11,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-07-23 15:30:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,591 INFO L225 Difference]: With dead ends: 18 [2018-07-23 15:30:11,591 INFO L226 Difference]: Without dead ends: 16 [2018-07-23 15:30:11,592 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:30:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-23 15:30:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-23 15:30:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-23 15:30:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-23 15:30:11,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-07-23 15:30:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,598 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-23 15:30:11,599 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:30:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-23 15:30:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-23 15:30:11,599 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,600 INFO L353 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-07-23 15:30:11,600 INFO L414 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1437556244, now seen corresponding path program 12 times [2018-07-23 15:30:11,602 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,751 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,752 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:30:11,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:30:11,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:30:11,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:30:11,753 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-07-23 15:30:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,775 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 15:30:11,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:30:11,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-07-23 15:30:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,781 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:30:11,782 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:30:11,783 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:30:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:30:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:30:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:30:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 15:30:11,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-07-23 15:30:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,790 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 15:30:11,790 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:30:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 15:30:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:30:11,791 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,791 INFO L353 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-07-23 15:30:11,791 INFO L414 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1614555225, now seen corresponding path program 13 times [2018-07-23 15:30:11,792 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:11,953 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:11,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:30:11,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:30:11,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:30:11,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:30:11,954 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-07-23 15:30:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:11,968 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-07-23 15:30:11,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:30:11,968 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-07-23 15:30:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:11,969 INFO L225 Difference]: With dead ends: 20 [2018-07-23 15:30:11,969 INFO L226 Difference]: Without dead ends: 18 [2018-07-23 15:30:11,970 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:30:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-23 15:30:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-23 15:30:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-23 15:30:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-23 15:30:11,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-07-23 15:30:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:11,975 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-23 15:30:11,975 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:30:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-23 15:30:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-23 15:30:11,976 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:11,976 INFO L353 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-07-23 15:30:11,976 INFO L414 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1488410956, now seen corresponding path program 14 times [2018-07-23 15:30:11,977 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:12,129 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,129 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:30:12,129 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:30:12,130 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:30:12,130 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:30:12,130 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-07-23 15:30:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,144 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-23 15:30:12,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:30:12,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-07-23 15:30:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,145 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:30:12,145 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:30:12,146 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:30:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:30:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:30:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:30:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-23 15:30:12,150 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-07-23 15:30:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,151 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-23 15:30:12,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:30:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-23 15:30:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:30:12,151 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,152 INFO L353 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-07-23 15:30:12,152 INFO L414 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1103885241, now seen corresponding path program 15 times [2018-07-23 15:30:12,152 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:12,330 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,331 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:30:12,331 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:30:12,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:30:12,335 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:30:12,335 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-07-23 15:30:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,355 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-07-23 15:30:12,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:30:12,356 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-07-23 15:30:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,356 INFO L225 Difference]: With dead ends: 22 [2018-07-23 15:30:12,357 INFO L226 Difference]: Without dead ends: 20 [2018-07-23 15:30:12,359 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:30:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-23 15:30:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-23 15:30:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-23 15:30:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-23 15:30:12,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-07-23 15:30:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,364 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-23 15:30:12,364 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:30:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-23 15:30:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-23 15:30:12,365 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,365 INFO L353 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-07-23 15:30:12,365 INFO L414 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash 139311276, now seen corresponding path program 16 times [2018-07-23 15:30:12,366 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:12,549 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,549 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:30:12,550 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:30:12,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:30:12,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:30:12,551 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-07-23 15:30:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,569 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-23 15:30:12,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:30:12,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-07-23 15:30:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,570 INFO L225 Difference]: With dead ends: 23 [2018-07-23 15:30:12,570 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:30:12,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:30:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:30:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:30:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:30:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-23 15:30:12,576 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-07-23 15:30:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,577 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-23 15:30:12,577 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:30:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-23 15:30:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:30:12,578 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,578 INFO L353 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-07-23 15:30:12,578 INFO L414 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,578 INFO L82 PathProgramCache]: Analyzing trace with hash 23697639, now seen corresponding path program 17 times [2018-07-23 15:30:12,579 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:12,782 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:12,782 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:30:12,782 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:30:12,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:30:12,783 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:30:12,784 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-07-23 15:30:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:12,805 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-07-23 15:30:12,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:30:12,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-07-23 15:30:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:12,808 INFO L225 Difference]: With dead ends: 24 [2018-07-23 15:30:12,808 INFO L226 Difference]: Without dead ends: 22 [2018-07-23 15:30:12,808 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:30:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-23 15:30:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-23 15:30:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-23 15:30:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-23 15:30:12,813 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-07-23 15:30:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:12,813 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-23 15:30:12,814 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:30:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-23 15:30:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-23 15:30:12,814 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:12,815 INFO L353 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-07-23 15:30:12,815 INFO L414 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:12,815 INFO L82 PathProgramCache]: Analyzing trace with hash 734642188, now seen corresponding path program 18 times [2018-07-23 15:30:12,815 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,025 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,025 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:30:13,026 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:30:13,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:30:13,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:30:13,027 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-07-23 15:30:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,044 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 15:30:13,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:30:13,044 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-07-23 15:30:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,045 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:30:13,045 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:30:13,046 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:30:13,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:30:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:30:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:30:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 15:30:13,050 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-07-23 15:30:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,051 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 15:30:13,051 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:30:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 15:30:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:30:13,052 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,052 INFO L353 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-07-23 15:30:13,052 INFO L414 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1299086727, now seen corresponding path program 19 times [2018-07-23 15:30:13,053 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,284 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,284 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:30:13,285 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:30:13,285 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:30:13,285 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:30:13,286 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-07-23 15:30:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,302 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-07-23 15:30:13,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:30:13,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-07-23 15:30:13,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,303 INFO L225 Difference]: With dead ends: 26 [2018-07-23 15:30:13,303 INFO L226 Difference]: Without dead ends: 24 [2018-07-23 15:30:13,304 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:30:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-23 15:30:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-23 15:30:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-23 15:30:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-23 15:30:13,308 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-07-23 15:30:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,309 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-23 15:30:13,309 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:30:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-23 15:30:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-23 15:30:13,310 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,310 INFO L353 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-07-23 15:30:13,310 INFO L414 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1616998252, now seen corresponding path program 20 times [2018-07-23 15:30:13,311 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,559 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,559 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:30:13,559 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:30:13,559 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:30:13,560 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:30:13,560 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-07-23 15:30:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,581 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-23 15:30:13,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:30:13,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-07-23 15:30:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,582 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:30:13,582 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:30:13,583 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:30:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:30:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:30:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:30:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-23 15:30:13,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-07-23 15:30:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,588 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-23 15:30:13,589 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:30:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-23 15:30:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:30:13,590 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,590 INFO L353 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-07-23 15:30:13,590 INFO L414 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1412646361, now seen corresponding path program 21 times [2018-07-23 15:30:13,590 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:13,936 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:13,936 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:30:13,937 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:30:13,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:30:13,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:30:13,938 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-07-23 15:30:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:13,964 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-07-23 15:30:13,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:30:13,965 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-07-23 15:30:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:13,965 INFO L225 Difference]: With dead ends: 28 [2018-07-23 15:30:13,966 INFO L226 Difference]: Without dead ends: 26 [2018-07-23 15:30:13,966 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:30:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-07-23 15:30:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-07-23 15:30:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-07-23 15:30:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-07-23 15:30:13,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-07-23 15:30:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:13,975 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-07-23 15:30:13,977 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:30:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-07-23 15:30:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-23 15:30:13,978 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:13,978 INFO L353 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-07-23 15:30:13,978 INFO L414 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:13,978 INFO L82 PathProgramCache]: Analyzing trace with hash -842348852, now seen corresponding path program 22 times [2018-07-23 15:30:13,978 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:14,240 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:14,240 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:30:14,240 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:30:14,241 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:30:14,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:30:14,242 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-07-23 15:30:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,265 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-23 15:30:14,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:30:14,265 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-07-23 15:30:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,265 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:30:14,265 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:30:14,266 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:30:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:30:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-23 15:30:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:30:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-23 15:30:14,272 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-07-23 15:30:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,272 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-23 15:30:14,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:30:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-23 15:30:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:30:14,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,273 INFO L353 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-07-23 15:30:14,274 INFO L414 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash -342995257, now seen corresponding path program 23 times [2018-07-23 15:30:14,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:14,514 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:14,515 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:30:14,515 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:30:14,515 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:30:14,516 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:30:14,516 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-07-23 15:30:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,537 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-07-23 15:30:14,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:30:14,537 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-07-23 15:30:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,538 INFO L225 Difference]: With dead ends: 30 [2018-07-23 15:30:14,538 INFO L226 Difference]: Without dead ends: 28 [2018-07-23 15:30:14,538 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:30:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-07-23 15:30:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-07-23 15:30:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-07-23 15:30:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-07-23 15:30:14,548 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-07-23 15:30:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,549 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-07-23 15:30:14,549 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:30:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-07-23 15:30:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-23 15:30:14,550 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,550 INFO L353 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-07-23 15:30:14,550 INFO L414 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2042902996, now seen corresponding path program 24 times [2018-07-23 15:30:14,552 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:14,839 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:14,839 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:30:14,840 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:30:14,840 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:30:14,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:30:14,841 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-07-23 15:30:14,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:14,861 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 15:30:14,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:30:14,862 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-07-23 15:30:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:14,862 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:30:14,862 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:30:14,863 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:30:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:30:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-23 15:30:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 15:30:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 15:30:14,868 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-07-23 15:30:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:14,868 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 15:30:14,868 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:30:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 15:30:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 15:30:14,869 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:14,869 INFO L353 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-07-23 15:30:14,869 INFO L414 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1094531943, now seen corresponding path program 25 times [2018-07-23 15:30:14,869 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:15,127 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,127 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:30:15,127 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:30:15,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:30:15,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:30:15,128 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-07-23 15:30:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:15,147 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-07-23 15:30:15,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:30:15,147 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-07-23 15:30:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:15,148 INFO L225 Difference]: With dead ends: 32 [2018-07-23 15:30:15,148 INFO L226 Difference]: Without dead ends: 30 [2018-07-23 15:30:15,148 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:30:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-07-23 15:30:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-07-23 15:30:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-07-23 15:30:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-07-23 15:30:15,152 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-07-23 15:30:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:15,153 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-07-23 15:30:15,153 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:30:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-07-23 15:30:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-23 15:30:15,154 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:15,154 INFO L353 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-07-23 15:30:15,154 INFO L414 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash -429232756, now seen corresponding path program 26 times [2018-07-23 15:30:15,154 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:15,421 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,421 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:30:15,421 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:30:15,421 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:30:15,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:30:15,422 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-07-23 15:30:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:15,440 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-23 15:30:15,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:30:15,440 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-07-23 15:30:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:15,441 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:30:15,441 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:30:15,442 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:30:15,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:30:15,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:30:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:30:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-07-23 15:30:15,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-07-23 15:30:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:15,446 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-07-23 15:30:15,446 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:30:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-07-23 15:30:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:30:15,447 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:15,447 INFO L353 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-07-23 15:30:15,447 INFO L414 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:15,447 INFO L82 PathProgramCache]: Analyzing trace with hash -421298169, now seen corresponding path program 27 times [2018-07-23 15:30:15,447 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:15,734 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:15,734 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:30:15,735 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:30:15,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:30:15,736 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:30:15,736 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-07-23 15:30:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:15,764 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-07-23 15:30:15,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:30:15,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-07-23 15:30:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:15,765 INFO L225 Difference]: With dead ends: 34 [2018-07-23 15:30:15,765 INFO L226 Difference]: Without dead ends: 32 [2018-07-23 15:30:15,766 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:30:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-07-23 15:30:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-07-23 15:30:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-07-23 15:30:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-07-23 15:30:15,777 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-07-23 15:30:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:15,777 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-07-23 15:30:15,777 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:30:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-07-23 15:30:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-23 15:30:15,778 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:15,778 INFO L353 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-07-23 15:30:15,778 INFO L414 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:15,778 INFO L82 PathProgramCache]: Analyzing trace with hash -175325972, now seen corresponding path program 28 times [2018-07-23 15:30:15,778 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:16,102 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:16,102 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:30:16,103 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:30:16,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:30:16,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:30:16,104 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-07-23 15:30:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,124 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-23 15:30:16,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:30:16,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-07-23 15:30:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,125 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:30:16,125 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:30:16,126 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:30:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:30:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-23 15:30:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:30:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-23 15:30:16,137 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-07-23 15:30:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,137 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-23 15:30:16,137 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:30:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-23 15:30:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:30:16,138 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,138 INFO L353 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-07-23 15:30:16,138 INFO L414 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1140122457, now seen corresponding path program 29 times [2018-07-23 15:30:16,139 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:16,484 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:16,484 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:30:16,484 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:30:16,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:30:16,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:30:16,486 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-07-23 15:30:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,514 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-07-23 15:30:16,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:30:16,514 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-07-23 15:30:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,515 INFO L225 Difference]: With dead ends: 36 [2018-07-23 15:30:16,515 INFO L226 Difference]: Without dead ends: 34 [2018-07-23 15:30:16,517 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:30:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-07-23 15:30:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-07-23 15:30:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-07-23 15:30:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-07-23 15:30:16,522 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-07-23 15:30:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,523 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-07-23 15:30:16,523 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:30:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-07-23 15:30:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-07-23 15:30:16,523 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,524 INFO L353 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-07-23 15:30:16,524 INFO L414 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -984042420, now seen corresponding path program 30 times [2018-07-23 15:30:16,524 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:16,922 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:16,922 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:30:16,923 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:30:16,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:30:16,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:30:16,924 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-07-23 15:30:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:16,950 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 15:30:16,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:30:16,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-07-23 15:30:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:16,951 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:30:16,951 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:30:16,952 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:30:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:30:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 15:30:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 15:30:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 15:30:16,956 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-07-23 15:30:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:16,956 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 15:30:16,956 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:30:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 15:30:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 15:30:16,957 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:16,957 INFO L353 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-07-23 15:30:16,959 INFO L414 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash -440528569, now seen corresponding path program 31 times [2018-07-23 15:30:16,960 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:17,375 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:17,375 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:30:17,375 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:30:17,376 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:30:17,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:30:17,376 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-07-23 15:30:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:17,397 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-07-23 15:30:17,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:30:17,397 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-07-23 15:30:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:17,398 INFO L225 Difference]: With dead ends: 38 [2018-07-23 15:30:17,398 INFO L226 Difference]: Without dead ends: 36 [2018-07-23 15:30:17,399 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:30:17,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-07-23 15:30:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-07-23 15:30:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-07-23 15:30:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-07-23 15:30:17,407 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-07-23 15:30:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:17,412 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-07-23 15:30:17,412 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:30:17,412 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-07-23 15:30:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-23 15:30:17,412 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:17,412 INFO L353 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-07-23 15:30:17,413 INFO L414 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:17,413 INFO L82 PathProgramCache]: Analyzing trace with hash -771468372, now seen corresponding path program 32 times [2018-07-23 15:30:17,413 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:17,736 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:17,736 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:30:17,736 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:30:17,737 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:30:17,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:30:17,740 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-07-23 15:30:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:17,759 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-23 15:30:17,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:30:17,759 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-07-23 15:30:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:17,760 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:30:17,760 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:30:17,761 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:30:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:30:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:30:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:30:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-07-23 15:30:17,765 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-07-23 15:30:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:17,766 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-07-23 15:30:17,766 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:30:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-07-23 15:30:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:30:17,766 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:17,766 INFO L353 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-07-23 15:30:17,767 INFO L414 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1854299623, now seen corresponding path program 33 times [2018-07-23 15:30:17,767 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:18,102 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:18,102 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:30:18,102 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:30:18,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:30:18,103 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:30:18,104 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-07-23 15:30:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:18,127 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-07-23 15:30:18,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:30:18,127 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-07-23 15:30:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:18,127 INFO L225 Difference]: With dead ends: 40 [2018-07-23 15:30:18,128 INFO L226 Difference]: Without dead ends: 38 [2018-07-23 15:30:18,129 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:30:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-07-23 15:30:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-07-23 15:30:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-07-23 15:30:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-07-23 15:30:18,136 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-07-23 15:30:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:18,136 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-07-23 15:30:18,136 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:30:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-07-23 15:30:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-23 15:30:18,137 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:18,137 INFO L353 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-07-23 15:30:18,137 INFO L414 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1648728844, now seen corresponding path program 34 times [2018-07-23 15:30:18,137 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:18,510 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:18,511 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:30:18,511 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:30:18,511 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:30:18,512 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:30:18,512 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-07-23 15:30:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:18,533 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-23 15:30:18,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:30:18,533 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-07-23 15:30:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:18,534 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:30:18,534 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:30:18,535 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:30:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:30:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-23 15:30:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:30:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-23 15:30:18,543 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-07-23 15:30:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:18,544 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-23 15:30:18,544 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:30:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-23 15:30:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:30:18,550 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:18,550 INFO L353 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-07-23 15:30:18,550 INFO L414 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:18,550 INFO L82 PathProgramCache]: Analyzing trace with hash -428998009, now seen corresponding path program 35 times [2018-07-23 15:30:18,550 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:18,915 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:18,915 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:30:18,915 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:30:18,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:30:18,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:30:18,917 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-07-23 15:30:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:18,935 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-07-23 15:30:18,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:30:18,936 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-07-23 15:30:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:18,936 INFO L225 Difference]: With dead ends: 42 [2018-07-23 15:30:18,936 INFO L226 Difference]: Without dead ends: 40 [2018-07-23 15:30:18,937 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:30:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-07-23 15:30:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-07-23 15:30:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-07-23 15:30:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-07-23 15:30:18,940 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-07-23 15:30:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:18,941 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-07-23 15:30:18,941 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:30:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-07-23 15:30:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-07-23 15:30:18,941 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:18,941 INFO L353 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-07-23 15:30:18,942 INFO L414 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:18,942 INFO L82 PathProgramCache]: Analyzing trace with hash -414021012, now seen corresponding path program 36 times [2018-07-23 15:30:18,942 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:19,305 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:19,305 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:30:19,305 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:30:19,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:30:19,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:30:19,308 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-07-23 15:30:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:19,330 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 15:30:19,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:30:19,330 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-07-23 15:30:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:19,331 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:30:19,331 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:30:19,332 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:30:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:30:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-23 15:30:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 15:30:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 15:30:19,336 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-07-23 15:30:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:19,336 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 15:30:19,336 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:30:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 15:30:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 15:30:19,337 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:19,337 INFO L353 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-07-23 15:30:19,337 INFO L414 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash 50265895, now seen corresponding path program 37 times [2018-07-23 15:30:19,338 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:19,713 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:19,713 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:30:19,713 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:30:19,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:30:19,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:30:19,715 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-07-23 15:30:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:19,744 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-07-23 15:30:19,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:30:19,745 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-07-23 15:30:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:19,745 INFO L225 Difference]: With dead ends: 44 [2018-07-23 15:30:19,745 INFO L226 Difference]: Without dead ends: 42 [2018-07-23 15:30:19,746 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:30:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-07-23 15:30:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-07-23 15:30:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-07-23 15:30:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-07-23 15:30:19,752 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-07-23 15:30:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:19,753 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-07-23 15:30:19,753 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:30:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-07-23 15:30:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-23 15:30:19,753 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:19,754 INFO L353 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-07-23 15:30:19,754 INFO L414 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:19,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1558258124, now seen corresponding path program 38 times [2018-07-23 15:30:19,755 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:20,204 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:20,204 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:30:20,205 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:30:20,205 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:30:20,206 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:30:20,207 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-07-23 15:30:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:20,236 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-23 15:30:20,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:30:20,237 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-07-23 15:30:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:20,237 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:30:20,237 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:30:20,238 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:30:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:30:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:30:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:30:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-07-23 15:30:20,243 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-07-23 15:30:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:20,243 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-07-23 15:30:20,243 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:30:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-07-23 15:30:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:30:20,244 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:20,244 INFO L353 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-07-23 15:30:20,244 INFO L414 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:20,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1061376967, now seen corresponding path program 39 times [2018-07-23 15:30:20,244 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:20,677 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:20,677 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:30:20,678 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:30:20,678 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:30:20,679 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:30:20,679 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-07-23 15:30:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:20,701 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-07-23 15:30:20,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:30:20,702 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-07-23 15:30:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:20,702 INFO L225 Difference]: With dead ends: 46 [2018-07-23 15:30:20,702 INFO L226 Difference]: Without dead ends: 44 [2018-07-23 15:30:20,704 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:30:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-07-23 15:30:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-07-23 15:30:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-07-23 15:30:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-07-23 15:30:20,707 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-07-23 15:30:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:20,707 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-07-23 15:30:20,708 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:30:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-07-23 15:30:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-07-23 15:30:20,708 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:20,708 INFO L353 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-07-23 15:30:20,708 INFO L414 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1457037012, now seen corresponding path program 40 times [2018-07-23 15:30:20,709 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:21,102 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:21,102 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:30:21,102 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:30:21,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:30:21,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:30:21,104 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-07-23 15:30:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:21,134 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-23 15:30:21,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:30:21,134 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-07-23 15:30:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:21,135 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:30:21,135 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:30:21,136 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:30:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:30:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-23 15:30:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:30:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-07-23 15:30:21,140 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-07-23 15:30:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:21,140 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-07-23 15:30:21,140 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:30:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-07-23 15:30:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:30:21,141 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:21,141 INFO L353 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-07-23 15:30:21,141 INFO L414 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2076508263, now seen corresponding path program 41 times [2018-07-23 15:30:21,142 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:21,538 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:21,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:30:21,539 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:30:21,539 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:30:21,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:30:21,540 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-07-23 15:30:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:21,563 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-07-23 15:30:21,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:30:21,563 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-07-23 15:30:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:21,564 INFO L225 Difference]: With dead ends: 48 [2018-07-23 15:30:21,564 INFO L226 Difference]: Without dead ends: 46 [2018-07-23 15:30:21,565 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:30:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-07-23 15:30:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-07-23 15:30:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-07-23 15:30:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-07-23 15:30:21,569 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-07-23 15:30:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:21,569 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-07-23 15:30:21,569 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:30:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-07-23 15:30:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-23 15:30:21,570 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:21,570 INFO L353 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-07-23 15:30:21,570 INFO L414 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash -52737908, now seen corresponding path program 42 times [2018-07-23 15:30:21,571 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:21,962 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:21,962 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:30:21,963 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:30:21,963 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:30:21,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:30:21,964 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-07-23 15:30:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:21,988 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 15:30:21,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:30:21,989 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-07-23 15:30:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:21,989 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:30:21,990 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:30:21,991 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:30:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:30:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 15:30:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 15:30:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 15:30:21,995 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-07-23 15:30:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:21,995 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 15:30:21,995 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:30:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 15:30:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 15:30:21,996 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:21,996 INFO L353 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-07-23 15:30:21,996 INFO L414 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1634859769, now seen corresponding path program 43 times [2018-07-23 15:30:21,996 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:22,410 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:22,410 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:30:22,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:30:22,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:30:22,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:30:22,412 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-07-23 15:30:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:22,442 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-07-23 15:30:22,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:30:22,442 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-07-23 15:30:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:22,443 INFO L225 Difference]: With dead ends: 50 [2018-07-23 15:30:22,443 INFO L226 Difference]: Without dead ends: 48 [2018-07-23 15:30:22,444 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:30:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-07-23 15:30:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-07-23 15:30:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-07-23 15:30:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-07-23 15:30:22,448 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-07-23 15:30:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:22,448 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-07-23 15:30:22,448 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:30:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-07-23 15:30:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-07-23 15:30:22,449 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:22,449 INFO L353 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-07-23 15:30:22,449 INFO L414 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash 858970092, now seen corresponding path program 44 times [2018-07-23 15:30:22,449 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:22,910 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:22,910 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:30:22,910 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:30:22,911 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:30:22,911 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:30:22,912 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-07-23 15:30:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:22,940 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-23 15:30:22,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:30:22,940 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-07-23 15:30:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:22,941 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:30:22,941 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:30:22,941 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:30:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:30:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:30:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:30:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-07-23 15:30:22,945 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-07-23 15:30:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:22,945 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-07-23 15:30:22,946 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:30:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-07-23 15:30:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:30:22,946 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:22,946 INFO L353 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-07-23 15:30:22,946 INFO L414 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash 858284455, now seen corresponding path program 45 times [2018-07-23 15:30:22,947 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:23,459 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:23,459 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:30:23,459 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:30:23,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:30:23,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:30:23,461 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-07-23 15:30:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:23,488 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-07-23 15:30:23,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:30:23,489 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-07-23 15:30:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:23,489 INFO L225 Difference]: With dead ends: 52 [2018-07-23 15:30:23,489 INFO L226 Difference]: Without dead ends: 50 [2018-07-23 15:30:23,490 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:30:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-07-23 15:30:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-07-23 15:30:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-07-23 15:30:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-07-23 15:30:23,495 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-07-23 15:30:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:23,495 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-07-23 15:30:23,495 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:30:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-07-23 15:30:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-07-23 15:30:23,496 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:23,496 INFO L353 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-07-23 15:30:23,496 INFO L414 AbstractCegarLoop]: === Iteration 47 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash 837029708, now seen corresponding path program 46 times [2018-07-23 15:30:23,496 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:23,951 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:23,951 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:30:23,951 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:30:23,952 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:30:23,952 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:30:23,953 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-07-23 15:30:23,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:23,977 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-23 15:30:23,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:30:23,978 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-07-23 15:30:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:23,978 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:30:23,979 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:30:23,979 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:30:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:30:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-23 15:30:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:30:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-07-23 15:30:23,983 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-07-23 15:30:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:23,984 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-07-23 15:30:23,984 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:30:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-07-23 15:30:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:30:23,984 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:23,984 INFO L353 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-07-23 15:30:23,985 INFO L414 AbstractCegarLoop]: === Iteration 48 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:23,985 INFO L82 PathProgramCache]: Analyzing trace with hash 178132551, now seen corresponding path program 47 times [2018-07-23 15:30:23,985 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:24,399 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:24,399 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:30:24,399 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:30:24,400 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:30:24,400 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:30:24,401 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-07-23 15:30:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:24,427 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-07-23 15:30:24,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:30:24,428 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-07-23 15:30:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:24,428 INFO L225 Difference]: With dead ends: 54 [2018-07-23 15:30:24,428 INFO L226 Difference]: Without dead ends: 52 [2018-07-23 15:30:24,429 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:30:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-07-23 15:30:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-07-23 15:30:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-07-23 15:30:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-07-23 15:30:24,435 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-07-23 15:30:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:24,435 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-07-23 15:30:24,436 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:30:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-07-23 15:30:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-23 15:30:24,436 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:24,437 INFO L353 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-07-23 15:30:24,437 INFO L414 AbstractCegarLoop]: === Iteration 49 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1227157164, now seen corresponding path program 48 times [2018-07-23 15:30:24,437 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:24,903 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:24,903 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:30:24,903 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:30:24,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:30:24,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:30:24,905 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-07-23 15:30:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:24,937 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 15:30:24,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:30:24,937 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-07-23 15:30:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:24,938 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:30:24,938 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:30:24,939 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:30:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:30:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-23 15:30:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 15:30:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 15:30:24,946 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-07-23 15:30:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:24,946 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 15:30:24,946 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:30:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 15:30:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 15:30:24,947 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:24,947 INFO L353 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-07-23 15:30:24,947 INFO L414 AbstractCegarLoop]: === Iteration 50 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash -612818201, now seen corresponding path program 49 times [2018-07-23 15:30:24,948 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:25,466 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:25,466 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:30:25,467 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:30:25,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:30:25,468 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:30:25,468 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-07-23 15:30:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:25,506 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-07-23 15:30:25,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:30:25,507 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-07-23 15:30:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:25,507 INFO L225 Difference]: With dead ends: 56 [2018-07-23 15:30:25,507 INFO L226 Difference]: Without dead ends: 54 [2018-07-23 15:30:25,508 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:30:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-07-23 15:30:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-07-23 15:30:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-07-23 15:30:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-07-23 15:30:25,513 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-07-23 15:30:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:25,513 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-07-23 15:30:25,513 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:30:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-07-23 15:30:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-07-23 15:30:25,514 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:25,514 INFO L353 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-07-23 15:30:25,514 INFO L414 AbstractCegarLoop]: === Iteration 51 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1817479668, now seen corresponding path program 50 times [2018-07-23 15:30:25,514 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:26,030 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:26,030 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:30:26,030 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:30:26,031 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:30:26,031 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:30:26,031 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-07-23 15:30:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:26,070 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-23 15:30:26,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:30:26,070 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-07-23 15:30:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:26,071 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:30:26,071 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:30:26,072 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:30:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:30:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:30:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:30:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-07-23 15:30:26,080 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-07-23 15:30:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:26,080 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-07-23 15:30:26,080 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:30:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-07-23 15:30:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:30:26,081 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:26,081 INFO L353 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-07-23 15:30:26,082 INFO L414 AbstractCegarLoop]: === Iteration 52 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:26,083 INFO L82 PathProgramCache]: Analyzing trace with hash -507279481, now seen corresponding path program 51 times [2018-07-23 15:30:26,083 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:26,607 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:26,607 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:30:26,608 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:30:26,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:30:26,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:30:26,609 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-07-23 15:30:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:26,636 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-07-23 15:30:26,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:30:26,636 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-07-23 15:30:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:26,637 INFO L225 Difference]: With dead ends: 58 [2018-07-23 15:30:26,637 INFO L226 Difference]: Without dead ends: 56 [2018-07-23 15:30:26,638 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:30:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-07-23 15:30:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-07-23 15:30:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-07-23 15:30:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-07-23 15:30:26,643 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-07-23 15:30:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:26,643 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-07-23 15:30:26,643 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:30:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-07-23 15:30:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-23 15:30:26,644 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:26,644 INFO L353 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-07-23 15:30:26,644 INFO L414 AbstractCegarLoop]: === Iteration 53 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1454220652, now seen corresponding path program 52 times [2018-07-23 15:30:26,644 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:27,083 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:27,083 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:30:27,083 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:30:27,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:30:27,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:30:27,084 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-07-23 15:30:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:27,122 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-23 15:30:27,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:30:27,122 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-07-23 15:30:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:27,123 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:30:27,123 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:30:27,124 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:30:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:30:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-23 15:30:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:30:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-07-23 15:30:27,128 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-07-23 15:30:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:27,129 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-07-23 15:30:27,129 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:30:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-07-23 15:30:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:30:27,129 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:27,129 INFO L353 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-07-23 15:30:27,130 INFO L414 AbstractCegarLoop]: === Iteration 54 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2131182631, now seen corresponding path program 53 times [2018-07-23 15:30:27,130 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:27,656 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:27,656 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:30:27,657 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:30:27,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:30:27,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:30:27,658 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-07-23 15:30:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:27,695 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-07-23 15:30:27,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:30:27,695 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-07-23 15:30:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:27,696 INFO L225 Difference]: With dead ends: 60 [2018-07-23 15:30:27,696 INFO L226 Difference]: Without dead ends: 58 [2018-07-23 15:30:27,696 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:30:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-07-23 15:30:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-07-23 15:30:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-07-23 15:30:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-07-23 15:30:27,701 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-07-23 15:30:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:27,702 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-07-23 15:30:27,702 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:30:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-07-23 15:30:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-07-23 15:30:27,704 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:27,704 INFO L353 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-07-23 15:30:27,704 INFO L414 AbstractCegarLoop]: === Iteration 55 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1642167500, now seen corresponding path program 54 times [2018-07-23 15:30:27,704 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:28,215 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:28,215 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:30:28,215 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:30:28,216 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:30:28,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:30:28,217 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-07-23 15:30:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:28,261 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 15:30:28,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:30:28,261 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-07-23 15:30:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:28,262 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:30:28,262 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:30:28,263 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:30:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:30:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 15:30:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 15:30:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 15:30:28,268 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-07-23 15:30:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:28,268 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 15:30:28,268 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:30:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 15:30:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 15:30:28,269 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:28,269 INFO L353 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-07-23 15:30:28,269 INFO L414 AbstractCegarLoop]: === Iteration 56 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash -632399673, now seen corresponding path program 55 times [2018-07-23 15:30:28,270 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:28,769 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:28,769 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:30:28,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:30:28,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:30:28,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:30:28,771 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-07-23 15:30:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:28,803 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-07-23 15:30:28,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:30:28,803 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-07-23 15:30:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:28,804 INFO L225 Difference]: With dead ends: 62 [2018-07-23 15:30:28,804 INFO L226 Difference]: Without dead ends: 60 [2018-07-23 15:30:28,805 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:30:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-07-23 15:30:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-07-23 15:30:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-07-23 15:30:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-07-23 15:30:28,810 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-07-23 15:30:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:28,810 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-07-23 15:30:28,810 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:30:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-07-23 15:30:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-07-23 15:30:28,811 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:28,811 INFO L353 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-07-23 15:30:28,811 INFO L414 AbstractCegarLoop]: === Iteration 57 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1870461996, now seen corresponding path program 56 times [2018-07-23 15:30:28,812 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:29,437 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:29,437 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:30:29,438 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:30:29,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:30:29,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:30:29,439 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-07-23 15:30:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:29,489 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-23 15:30:29,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:30:29,489 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-07-23 15:30:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:29,490 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:30:29,490 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:30:29,491 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:30:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:30:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:30:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:30:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-07-23 15:30:29,496 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-07-23 15:30:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:29,496 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-07-23 15:30:29,496 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:30:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-07-23 15:30:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:30:29,497 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:29,497 INFO L353 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-07-23 15:30:29,497 INFO L414 AbstractCegarLoop]: === Iteration 58 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2145204889, now seen corresponding path program 57 times [2018-07-23 15:30:29,497 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:30,122 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:30,122 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:30:30,122 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:30:30,123 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:30:30,123 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:30:30,123 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-07-23 15:30:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:30,170 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-07-23 15:30:30,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:30:30,171 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-07-23 15:30:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:30,171 INFO L225 Difference]: With dead ends: 64 [2018-07-23 15:30:30,172 INFO L226 Difference]: Without dead ends: 62 [2018-07-23 15:30:30,172 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:30:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-07-23 15:30:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-07-23 15:30:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-07-23 15:30:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-07-23 15:30:30,177 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-07-23 15:30:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:30,177 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-07-23 15:30:30,177 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:30:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-07-23 15:30:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-23 15:30:30,178 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:30,178 INFO L353 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-07-23 15:30:30,178 INFO L414 AbstractCegarLoop]: === Iteration 59 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:30,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2076826740, now seen corresponding path program 58 times [2018-07-23 15:30:30,178 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:30,663 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:30,663 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:30:30,663 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:30:30,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:30:30,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:30:30,665 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-07-23 15:30:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:30,711 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-23 15:30:30,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:30:30,711 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-07-23 15:30:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:30,712 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:30:30,712 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:30:30,712 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:30:30,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:30:30,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-23 15:30:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:30:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-07-23 15:30:30,716 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-07-23 15:30:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:30,716 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-07-23 15:30:30,717 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:30:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-07-23 15:30:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:30:30,717 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:30,717 INFO L353 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-07-23 15:30:30,718 INFO L414 AbstractCegarLoop]: === Iteration 60 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:30,718 INFO L82 PathProgramCache]: Analyzing trace with hash 42895879, now seen corresponding path program 59 times [2018-07-23 15:30:30,718 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:31,282 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:31,282 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:30:31,282 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:30:31,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:30:31,284 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:30:31,284 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-07-23 15:30:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:31,330 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-07-23 15:30:31,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:30:31,330 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-07-23 15:30:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:31,331 INFO L225 Difference]: With dead ends: 66 [2018-07-23 15:30:31,331 INFO L226 Difference]: Without dead ends: 64 [2018-07-23 15:30:31,331 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:30:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-07-23 15:30:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-07-23 15:30:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-07-23 15:30:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-07-23 15:30:31,335 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-07-23 15:30:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:31,335 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-07-23 15:30:31,335 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:30:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-07-23 15:30:31,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-07-23 15:30:31,336 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:31,336 INFO L353 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-07-23 15:30:31,336 INFO L414 AbstractCegarLoop]: === Iteration 61 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1329787628, now seen corresponding path program 60 times [2018-07-23 15:30:31,337 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:31,879 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:31,879 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:30:31,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:30:31,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:30:31,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:30:31,881 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-07-23 15:30:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:31,927 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 15:30:31,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:30:31,928 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-07-23 15:30:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:31,928 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:30:31,928 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:30:31,929 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:30:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:30:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-23 15:30:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 15:30:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 15:30:31,933 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-07-23 15:30:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:31,933 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 15:30:31,933 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:30:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 15:30:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 15:30:31,934 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:31,934 INFO L353 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-07-23 15:30:31,934 INFO L414 AbstractCegarLoop]: === Iteration 62 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1726241113, now seen corresponding path program 61 times [2018-07-23 15:30:31,935 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:32,572 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:32,572 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:30:32,573 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:30:32,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:30:32,574 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:30:32,574 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-07-23 15:30:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:32,613 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-07-23 15:30:32,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:30:32,613 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-07-23 15:30:32,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:32,613 INFO L225 Difference]: With dead ends: 68 [2018-07-23 15:30:32,614 INFO L226 Difference]: Without dead ends: 66 [2018-07-23 15:30:32,614 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:30:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-07-23 15:30:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-07-23 15:30:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-07-23 15:30:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-07-23 15:30:32,618 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-07-23 15:30:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:32,618 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-07-23 15:30:32,618 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:30:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-07-23 15:30:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-07-23 15:30:32,619 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:32,619 INFO L353 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-07-23 15:30:32,619 INFO L414 AbstractCegarLoop]: === Iteration 63 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1973851572, now seen corresponding path program 62 times [2018-07-23 15:30:32,619 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:33,126 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:33,127 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:30:33,127 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:30:33,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:30:33,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:30:33,128 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-07-23 15:30:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:33,169 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-23 15:30:33,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:30:33,169 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-07-23 15:30:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:33,170 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:30:33,170 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:30:33,170 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:30:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:30:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:30:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:30:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-07-23 15:30:33,174 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-07-23 15:30:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:33,175 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-07-23 15:30:33,175 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:30:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-07-23 15:30:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:30:33,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:33,176 INFO L353 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-07-23 15:30:33,176 INFO L414 AbstractCegarLoop]: === Iteration 64 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1059841209, now seen corresponding path program 63 times [2018-07-23 15:30:33,176 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:33,689 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:33,689 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:30:33,690 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:30:33,690 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:30:33,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:30:33,692 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-07-23 15:30:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:33,724 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-07-23 15:30:33,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:30:33,724 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-07-23 15:30:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:33,725 INFO L225 Difference]: With dead ends: 70 [2018-07-23 15:30:33,725 INFO L226 Difference]: Without dead ends: 68 [2018-07-23 15:30:33,726 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:30:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-07-23 15:30:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-07-23 15:30:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-07-23 15:30:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-07-23 15:30:33,730 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-07-23 15:30:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:33,730 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-07-23 15:30:33,730 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:30:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-07-23 15:30:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-07-23 15:30:33,731 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:33,731 INFO L353 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-07-23 15:30:33,731 INFO L414 AbstractCegarLoop]: === Iteration 65 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1504676268, now seen corresponding path program 64 times [2018-07-23 15:30:33,732 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:34,264 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:34,265 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:30:34,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:30:34,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:30:34,266 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:30:34,266 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-07-23 15:30:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:34,305 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-23 15:30:34,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:30:34,305 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-07-23 15:30:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:34,306 INFO L225 Difference]: With dead ends: 71 [2018-07-23 15:30:34,306 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:30:34,307 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:30:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:30:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-23 15:30:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:30:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-07-23 15:30:34,310 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-07-23 15:30:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:34,310 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-07-23 15:30:34,310 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:30:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-07-23 15:30:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:30:34,311 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:34,311 INFO L353 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-07-23 15:30:34,311 INFO L414 AbstractCegarLoop]: === Iteration 66 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash -599660569, now seen corresponding path program 65 times [2018-07-23 15:30:34,312 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:35,051 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:35,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:30:35,052 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:30:35,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:30:35,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:30:35,053 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-07-23 15:30:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:35,112 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-07-23 15:30:35,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:30:35,112 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-07-23 15:30:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:35,113 INFO L225 Difference]: With dead ends: 72 [2018-07-23 15:30:35,113 INFO L226 Difference]: Without dead ends: 70 [2018-07-23 15:30:35,113 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:30:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-07-23 15:30:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-07-23 15:30:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-07-23 15:30:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-07-23 15:30:35,117 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-07-23 15:30:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:35,118 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-07-23 15:30:35,118 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:30:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-07-23 15:30:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-07-23 15:30:35,119 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:35,119 INFO L353 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-07-23 15:30:35,119 INFO L414 AbstractCegarLoop]: === Iteration 67 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:35,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1409593076, now seen corresponding path program 66 times [2018-07-23 15:30:35,119 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:35,898 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:35,898 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:30:35,899 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:30:35,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:30:35,899 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:30:35,900 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-07-23 15:30:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:35,939 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 15:30:35,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:30:35,940 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-07-23 15:30:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:35,940 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:30:35,940 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:30:35,941 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:30:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:30:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 15:30:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 15:30:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 15:30:35,945 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-07-23 15:30:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:35,946 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 15:30:35,946 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:30:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 15:30:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 15:30:35,947 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:35,947 INFO L353 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-07-23 15:30:35,947 INFO L414 AbstractCegarLoop]: === Iteration 68 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash -747697017, now seen corresponding path program 67 times [2018-07-23 15:30:35,947 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:36,503 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:36,503 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:30:36,504 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:30:36,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:30:36,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:30:36,504 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-07-23 15:30:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:36,528 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-07-23 15:30:36,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:30:36,529 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-07-23 15:30:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:36,529 INFO L225 Difference]: With dead ends: 74 [2018-07-23 15:30:36,529 INFO L226 Difference]: Without dead ends: 72 [2018-07-23 15:30:36,530 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:30:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-07-23 15:30:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-07-23 15:30:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-07-23 15:30:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-07-23 15:30:36,534 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-07-23 15:30:36,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:36,535 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-07-23 15:30:36,535 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:30:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-07-23 15:30:36,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-07-23 15:30:36,535 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:36,535 INFO L353 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-07-23 15:30:36,536 INFO L414 AbstractCegarLoop]: === Iteration 69 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:36,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1703755668, now seen corresponding path program 68 times [2018-07-23 15:30:36,536 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:37,046 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:37,046 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:30:37,046 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:30:37,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:30:37,047 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:30:37,047 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-07-23 15:30:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:37,098 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-23 15:30:37,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:30:37,098 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-07-23 15:30:37,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:37,099 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:30:37,099 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:30:37,100 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:30:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:30:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:30:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:30:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-07-23 15:30:37,104 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-07-23 15:30:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:37,105 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-07-23 15:30:37,105 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:30:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-07-23 15:30:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:30:37,105 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:37,106 INFO L353 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-07-23 15:30:37,106 INFO L414 AbstractCegarLoop]: === Iteration 70 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:37,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1276802777, now seen corresponding path program 69 times [2018-07-23 15:30:37,106 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:37,667 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:37,667 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:30:37,668 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:30:37,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:30:37,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:30:37,668 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-07-23 15:30:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:37,710 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-07-23 15:30:37,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:30:37,710 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-07-23 15:30:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:37,711 INFO L225 Difference]: With dead ends: 76 [2018-07-23 15:30:37,711 INFO L226 Difference]: Without dead ends: 74 [2018-07-23 15:30:37,711 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:30:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-07-23 15:30:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-07-23 15:30:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-07-23 15:30:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-07-23 15:30:37,715 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-07-23 15:30:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:37,715 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-07-23 15:30:37,715 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:30:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-07-23 15:30:37,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-23 15:30:37,716 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:37,716 INFO L353 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-07-23 15:30:37,716 INFO L414 AbstractCegarLoop]: === Iteration 71 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash -926165044, now seen corresponding path program 70 times [2018-07-23 15:30:37,716 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:38,331 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:38,331 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:30:38,331 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:30:38,332 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:30:38,332 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:30:38,332 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-07-23 15:30:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:38,377 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-23 15:30:38,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:30:38,378 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-07-23 15:30:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:38,378 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:30:38,378 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:30:38,379 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:30:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:30:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-23 15:30:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:30:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-07-23 15:30:38,384 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-07-23 15:30:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:38,384 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-07-23 15:30:38,384 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:30:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-07-23 15:30:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:30:38,385 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:38,385 INFO L353 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-07-23 15:30:38,385 INFO L414 AbstractCegarLoop]: === Iteration 72 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1353670087, now seen corresponding path program 71 times [2018-07-23 15:30:38,385 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:38,927 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:38,927 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:30:38,927 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:30:38,928 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:30:38,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:30:38,929 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-07-23 15:30:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:38,973 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-07-23 15:30:38,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:30:38,974 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-07-23 15:30:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:38,974 INFO L225 Difference]: With dead ends: 78 [2018-07-23 15:30:38,974 INFO L226 Difference]: Without dead ends: 76 [2018-07-23 15:30:38,975 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:30:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-07-23 15:30:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-07-23 15:30:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-07-23 15:30:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-07-23 15:30:38,980 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-07-23 15:30:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:38,980 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-07-23 15:30:38,980 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:30:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-07-23 15:30:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-07-23 15:30:38,980 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:38,981 INFO L353 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-07-23 15:30:38,981 INFO L414 AbstractCegarLoop]: === Iteration 73 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash -985884884, now seen corresponding path program 72 times [2018-07-23 15:30:38,981 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:39,575 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:39,575 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:30:39,576 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:30:39,576 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:30:39,576 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:30:39,577 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-07-23 15:30:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:39,633 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 15:30:39,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:30:39,633 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-07-23 15:30:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:39,634 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:30:39,634 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:30:39,635 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:30:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:30:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-23 15:30:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 15:30:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 15:30:39,638 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-07-23 15:30:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:39,639 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 15:30:39,639 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:30:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 15:30:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 15:30:39,639 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:39,639 INFO L353 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-07-23 15:30:39,639 INFO L414 AbstractCegarLoop]: === Iteration 74 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:39,640 INFO L82 PathProgramCache]: Analyzing trace with hash -497644953, now seen corresponding path program 73 times [2018-07-23 15:30:39,640 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:40,184 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:40,184 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:30:40,185 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:30:40,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:30:40,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:30:40,186 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-07-23 15:30:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:40,235 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-07-23 15:30:40,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:30:40,235 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-07-23 15:30:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:40,235 INFO L225 Difference]: With dead ends: 80 [2018-07-23 15:30:40,236 INFO L226 Difference]: Without dead ends: 78 [2018-07-23 15:30:40,236 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:30:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-07-23 15:30:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-07-23 15:30:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-07-23 15:30:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-07-23 15:30:40,239 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-07-23 15:30:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:40,239 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-07-23 15:30:40,240 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:30:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-07-23 15:30:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-07-23 15:30:40,240 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:40,240 INFO L353 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-07-23 15:30:40,240 INFO L414 AbstractCegarLoop]: === Iteration 75 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1752891020, now seen corresponding path program 74 times [2018-07-23 15:30:40,241 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:40,798 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:40,798 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:30:40,798 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:30:40,799 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:30:40,799 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:30:40,799 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-07-23 15:30:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:40,850 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-23 15:30:40,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:30:40,850 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-07-23 15:30:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:40,851 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:30:40,851 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:30:40,851 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:30:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:30:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:30:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:30:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-07-23 15:30:40,856 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-07-23 15:30:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:40,857 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-07-23 15:30:40,857 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:30:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-07-23 15:30:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:30:40,857 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:40,858 INFO L353 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-07-23 15:30:40,858 INFO L414 AbstractCegarLoop]: === Iteration 76 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:40,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1494937849, now seen corresponding path program 75 times [2018-07-23 15:30:40,858 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:41,590 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:41,590 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:30:41,590 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:30:41,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:30:41,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:30:41,591 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-07-23 15:30:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:41,639 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-07-23 15:30:41,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:30:41,639 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-07-23 15:30:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:41,640 INFO L225 Difference]: With dead ends: 82 [2018-07-23 15:30:41,640 INFO L226 Difference]: Without dead ends: 80 [2018-07-23 15:30:41,640 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:30:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-07-23 15:30:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-07-23 15:30:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-07-23 15:30:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-07-23 15:30:41,644 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-07-23 15:30:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:41,644 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-07-23 15:30:41,644 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:30:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-07-23 15:30:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-23 15:30:41,645 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:41,645 INFO L353 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-07-23 15:30:41,645 INFO L414 AbstractCegarLoop]: === Iteration 77 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash 901582316, now seen corresponding path program 76 times [2018-07-23 15:30:41,645 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:42,219 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:42,219 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:30:42,219 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:30:42,220 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:30:42,220 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:30:42,220 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-07-23 15:30:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:42,259 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-23 15:30:42,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:30:42,260 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-07-23 15:30:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:42,260 INFO L225 Difference]: With dead ends: 83 [2018-07-23 15:30:42,260 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:30:42,261 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:30:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:30:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-23 15:30:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:30:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-07-23 15:30:42,266 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-07-23 15:30:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:42,266 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-07-23 15:30:42,266 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:30:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-07-23 15:30:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:30:42,267 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:42,267 INFO L353 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-07-23 15:30:42,267 INFO L414 AbstractCegarLoop]: === Iteration 78 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:42,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2115703897, now seen corresponding path program 77 times [2018-07-23 15:30:42,267 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:42,904 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:42,904 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:30:42,904 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:30:42,905 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:30:42,905 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:30:42,905 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-07-23 15:30:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:42,942 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-07-23 15:30:42,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:30:42,942 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-07-23 15:30:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:42,942 INFO L225 Difference]: With dead ends: 84 [2018-07-23 15:30:42,942 INFO L226 Difference]: Without dead ends: 82 [2018-07-23 15:30:42,943 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:30:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-07-23 15:30:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-07-23 15:30:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-07-23 15:30:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-07-23 15:30:42,946 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-07-23 15:30:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:42,946 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-07-23 15:30:42,947 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:30:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-07-23 15:30:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-07-23 15:30:42,947 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:42,947 INFO L353 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-07-23 15:30:42,947 INFO L414 AbstractCegarLoop]: === Iteration 79 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:42,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1162295988, now seen corresponding path program 78 times [2018-07-23 15:30:42,947 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:43,612 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:43,612 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:30:43,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:30:43,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:30:43,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:30:43,614 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-07-23 15:30:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:43,674 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 15:30:43,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:30:43,674 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-07-23 15:30:43,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:43,675 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:30:43,675 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:30:43,676 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:30:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:30:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 15:30:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 15:30:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 15:30:43,679 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-07-23 15:30:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:43,680 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 15:30:43,680 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:30:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 15:30:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 15:30:43,680 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:43,680 INFO L353 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-07-23 15:30:43,681 INFO L414 AbstractCegarLoop]: === Iteration 80 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1671421881, now seen corresponding path program 79 times [2018-07-23 15:30:43,681 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:44,453 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:44,453 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:30:44,453 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:30:44,454 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:30:44,454 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:30:44,454 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-07-23 15:30:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:44,521 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-07-23 15:30:44,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:30:44,521 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-07-23 15:30:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:44,522 INFO L225 Difference]: With dead ends: 86 [2018-07-23 15:30:44,522 INFO L226 Difference]: Without dead ends: 84 [2018-07-23 15:30:44,523 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:30:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-07-23 15:30:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-07-23 15:30:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-07-23 15:30:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-07-23 15:30:44,529 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-07-23 15:30:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:44,529 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-07-23 15:30:44,529 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:30:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-07-23 15:30:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-23 15:30:44,530 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:44,530 INFO L353 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-07-23 15:30:44,530 INFO L414 AbstractCegarLoop]: === Iteration 81 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:44,531 INFO L82 PathProgramCache]: Analyzing trace with hash -274455380, now seen corresponding path program 80 times [2018-07-23 15:30:44,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:45,254 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:45,254 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:30:45,254 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:30:45,255 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:30:45,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:30:45,256 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-07-23 15:30:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:45,295 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-23 15:30:45,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:30:45,295 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-07-23 15:30:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:45,296 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:30:45,296 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:30:45,297 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:30:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:30:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:30:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:30:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-07-23 15:30:45,302 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-07-23 15:30:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:45,303 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-07-23 15:30:45,303 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:30:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-07-23 15:30:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:30:45,303 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:45,304 INFO L353 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-07-23 15:30:45,304 INFO L414 AbstractCegarLoop]: === Iteration 82 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash 81833191, now seen corresponding path program 81 times [2018-07-23 15:30:45,304 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:45,939 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:45,939 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:30:45,940 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:30:45,940 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:30:45,940 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:30:45,941 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-07-23 15:30:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:45,986 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-07-23 15:30:45,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:30:45,986 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-07-23 15:30:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:45,987 INFO L225 Difference]: With dead ends: 88 [2018-07-23 15:30:45,987 INFO L226 Difference]: Without dead ends: 86 [2018-07-23 15:30:45,987 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:30:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-07-23 15:30:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-07-23 15:30:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-07-23 15:30:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-07-23 15:30:45,992 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-07-23 15:30:45,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:45,992 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-07-23 15:30:45,992 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:30:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-07-23 15:30:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-23 15:30:45,992 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:45,993 INFO L353 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-07-23 15:30:45,993 INFO L414 AbstractCegarLoop]: === Iteration 83 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1758122996, now seen corresponding path program 82 times [2018-07-23 15:30:45,993 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:46,646 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:46,646 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:30:46,646 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:30:46,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:30:46,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:30:46,647 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-07-23 15:30:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:46,724 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-23 15:30:46,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:30:46,724 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-07-23 15:30:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:46,724 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:30:46,724 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:30:46,725 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:30:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:30:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-23 15:30:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:30:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-07-23 15:30:46,728 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-07-23 15:30:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:46,728 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-07-23 15:30:46,728 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:30:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-07-23 15:30:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:30:46,729 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:46,729 INFO L353 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-07-23 15:30:46,729 INFO L414 AbstractCegarLoop]: === Iteration 84 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:46,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1332777351, now seen corresponding path program 83 times [2018-07-23 15:30:46,729 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:47,561 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:47,561 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:30:47,561 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:30:47,562 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:30:47,563 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:30:47,563 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-07-23 15:30:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:47,614 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-07-23 15:30:47,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:30:47,615 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-07-23 15:30:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:47,616 INFO L225 Difference]: With dead ends: 90 [2018-07-23 15:30:47,616 INFO L226 Difference]: Without dead ends: 88 [2018-07-23 15:30:47,616 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:30:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-07-23 15:30:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-07-23 15:30:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-07-23 15:30:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-07-23 15:30:47,621 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-07-23 15:30:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:47,622 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-07-23 15:30:47,622 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:30:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-07-23 15:30:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-23 15:30:47,622 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:47,623 INFO L353 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-07-23 15:30:47,623 INFO L414 AbstractCegarLoop]: === Iteration 85 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1633559700, now seen corresponding path program 84 times [2018-07-23 15:30:47,623 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:48,278 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:48,278 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:30:48,279 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:30:48,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:30:48,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:30:48,280 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-07-23 15:30:48,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:48,362 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 15:30:48,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:30:48,363 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-07-23 15:30:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:48,363 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:30:48,363 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:30:48,364 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:30:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:30:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-23 15:30:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 15:30:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 15:30:48,368 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-07-23 15:30:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:48,368 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 15:30:48,368 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:30:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 15:30:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 15:30:48,369 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:48,369 INFO L353 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-07-23 15:30:48,369 INFO L414 AbstractCegarLoop]: === Iteration 86 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:48,370 INFO L82 PathProgramCache]: Analyzing trace with hash 899272231, now seen corresponding path program 85 times [2018-07-23 15:30:48,370 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:49,115 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:49,115 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:30:49,116 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:30:49,116 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:30:49,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:30:49,117 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-07-23 15:30:49,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:49,176 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-07-23 15:30:49,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:30:49,176 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-07-23 15:30:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:49,177 INFO L225 Difference]: With dead ends: 92 [2018-07-23 15:30:49,177 INFO L226 Difference]: Without dead ends: 90 [2018-07-23 15:30:49,178 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:30:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-07-23 15:30:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-07-23 15:30:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-07-23 15:30:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-07-23 15:30:49,183 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-07-23 15:30:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:49,184 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-07-23 15:30:49,184 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:30:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-07-23 15:30:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-07-23 15:30:49,184 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:49,185 INFO L353 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-07-23 15:30:49,185 INFO L414 AbstractCegarLoop]: === Iteration 87 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2107650764, now seen corresponding path program 86 times [2018-07-23 15:30:49,185 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:50,016 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:50,016 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:30:50,016 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:30:50,017 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:30:50,018 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:30:50,018 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-07-23 15:30:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:50,104 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-23 15:30:50,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:30:50,104 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-07-23 15:30:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:50,105 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:30:50,105 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:30:50,106 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:30:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:30:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:30:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:30:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-07-23 15:30:50,111 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-07-23 15:30:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:50,112 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-07-23 15:30:50,112 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:30:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-07-23 15:30:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:30:50,113 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:50,113 INFO L353 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-07-23 15:30:50,113 INFO L414 AbstractCegarLoop]: === Iteration 88 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash 912679623, now seen corresponding path program 87 times [2018-07-23 15:30:50,113 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:50,960 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:50,960 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:30:50,960 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:30:50,961 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:30:50,961 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:30:50,962 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-07-23 15:30:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:51,007 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-07-23 15:30:51,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:30:51,007 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-07-23 15:30:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:51,008 INFO L225 Difference]: With dead ends: 94 [2018-07-23 15:30:51,008 INFO L226 Difference]: Without dead ends: 92 [2018-07-23 15:30:51,009 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:30:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-07-23 15:30:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-07-23 15:30:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-07-23 15:30:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-07-23 15:30:51,014 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-07-23 15:30:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:51,015 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-07-23 15:30:51,015 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:30:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-07-23 15:30:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-07-23 15:30:51,015 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:51,016 INFO L353 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-07-23 15:30:51,016 INFO L414 AbstractCegarLoop]: === Iteration 89 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:51,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1771687380, now seen corresponding path program 88 times [2018-07-23 15:30:51,016 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:51,799 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:51,799 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:30:51,800 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:30:51,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:30:51,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:30:51,801 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-07-23 15:30:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:51,885 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-23 15:30:51,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:30:51,885 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-07-23 15:30:51,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:51,886 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:30:51,886 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:30:51,887 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:30:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:30:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-23 15:30:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:30:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-07-23 15:30:51,892 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-07-23 15:30:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:51,892 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-07-23 15:30:51,892 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:30:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-07-23 15:30:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:30:51,893 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:51,894 INFO L353 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-07-23 15:30:51,894 INFO L414 AbstractCegarLoop]: === Iteration 90 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash 912281447, now seen corresponding path program 89 times [2018-07-23 15:30:51,894 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:52,742 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:52,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:30:52,743 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:30:52,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:30:52,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:30:52,744 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-07-23 15:30:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:52,843 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-07-23 15:30:52,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:30:52,843 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-07-23 15:30:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:52,844 INFO L225 Difference]: With dead ends: 96 [2018-07-23 15:30:52,844 INFO L226 Difference]: Without dead ends: 94 [2018-07-23 15:30:52,845 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:30:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-07-23 15:30:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-07-23 15:30:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-07-23 15:30:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-07-23 15:30:52,850 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-07-23 15:30:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:52,850 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-07-23 15:30:52,850 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:30:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-07-23 15:30:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-23 15:30:52,851 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:52,851 INFO L353 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-07-23 15:30:52,851 INFO L414 AbstractCegarLoop]: === Iteration 91 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1784030836, now seen corresponding path program 90 times [2018-07-23 15:30:52,852 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:53,828 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:53,828 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:30:53,829 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:30:53,830 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:30:53,830 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:30:53,831 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-07-23 15:30:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:53,882 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 15:30:53,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:30:53,883 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-07-23 15:30:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:53,883 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:30:53,884 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:30:53,885 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:30:53,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:30:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 15:30:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 15:30:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 15:30:53,891 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-07-23 15:30:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:53,891 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 15:30:53,891 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:30:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 15:30:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 15:30:53,892 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:53,892 INFO L353 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-07-23 15:30:53,892 INFO L414 AbstractCegarLoop]: === Iteration 92 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash 529634311, now seen corresponding path program 91 times [2018-07-23 15:30:53,893 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:54,846 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:54,846 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:30:54,847 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:30:54,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:30:54,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:30:54,848 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-07-23 15:30:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:54,923 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-07-23 15:30:54,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:30:54,924 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-07-23 15:30:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:54,924 INFO L225 Difference]: With dead ends: 98 [2018-07-23 15:30:54,924 INFO L226 Difference]: Without dead ends: 96 [2018-07-23 15:30:54,925 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:30:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-07-23 15:30:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-07-23 15:30:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-07-23 15:30:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-07-23 15:30:54,930 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-07-23 15:30:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:54,930 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-07-23 15:30:54,930 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:30:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-07-23 15:30:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-07-23 15:30:54,931 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:54,931 INFO L353 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-07-23 15:30:54,931 INFO L414 AbstractCegarLoop]: === Iteration 93 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:54,931 INFO L82 PathProgramCache]: Analyzing trace with hash -761190164, now seen corresponding path program 92 times [2018-07-23 15:30:54,931 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:55,809 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:55,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:30:55,809 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:30:55,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:30:55,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:30:55,810 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-07-23 15:30:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:55,912 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-23 15:30:55,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-07-23 15:30:55,912 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-07-23 15:30:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:55,913 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:30:55,913 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:30:55,914 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:30:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:30:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:30:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:30:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-07-23 15:30:55,918 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-07-23 15:30:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:55,918 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-07-23 15:30:55,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-07-23 15:30:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-07-23 15:30:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:30:55,919 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:55,919 INFO L353 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-07-23 15:30:55,919 INFO L414 AbstractCegarLoop]: === Iteration 94 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2122043225, now seen corresponding path program 93 times [2018-07-23 15:30:55,919 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:56,846 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:56,846 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-07-23 15:30:56,847 INFO L450 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-07-23 15:30:56,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-07-23 15:30:56,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:30:56,848 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-07-23 15:30:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:56,984 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-07-23 15:30:56,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-07-23 15:30:56,984 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-07-23 15:30:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:56,985 INFO L225 Difference]: With dead ends: 100 [2018-07-23 15:30:56,985 INFO L226 Difference]: Without dead ends: 98 [2018-07-23 15:30:56,985 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-07-23 15:30:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-07-23 15:30:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-07-23 15:30:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-07-23 15:30:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-07-23 15:30:56,990 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-07-23 15:30:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:56,990 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-07-23 15:30:56,990 INFO L472 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-07-23 15:30:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-07-23 15:30:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-07-23 15:30:56,991 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:56,991 INFO L353 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-07-23 15:30:56,991 INFO L414 AbstractCegarLoop]: === Iteration 95 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:56,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1358815156, now seen corresponding path program 94 times [2018-07-23 15:30:56,991 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:58,097 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:58,097 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-07-23 15:30:58,097 INFO L450 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-07-23 15:30:58,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-07-23 15:30:58,098 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:30:58,098 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-07-23 15:30:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:58,162 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-23 15:30:58,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-07-23 15:30:58,162 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-07-23 15:30:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:58,163 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:30:58,163 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:30:58,164 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:30:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:30:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-23 15:30:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:30:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-07-23 15:30:58,170 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-07-23 15:30:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:58,171 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-07-23 15:30:58,171 INFO L472 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-07-23 15:30:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-07-23 15:30:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:30:58,171 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:58,172 INFO L353 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-07-23 15:30:58,172 INFO L414 AbstractCegarLoop]: === Iteration 96 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash 826418503, now seen corresponding path program 95 times [2018-07-23 15:30:58,172 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:30:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:30:59,133 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:30:59,133 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-07-23 15:30:59,133 INFO L450 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-07-23 15:30:59,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-07-23 15:30:59,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:30:59,135 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-07-23 15:30:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:30:59,192 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-07-23 15:30:59,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-07-23 15:30:59,192 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-07-23 15:30:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:30:59,193 INFO L225 Difference]: With dead ends: 102 [2018-07-23 15:30:59,193 INFO L226 Difference]: Without dead ends: 100 [2018-07-23 15:30:59,194 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-07-23 15:30:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-07-23 15:30:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-07-23 15:30:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-07-23 15:30:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-07-23 15:30:59,200 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-07-23 15:30:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:30:59,200 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-07-23 15:30:59,200 INFO L472 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-07-23 15:30:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-07-23 15:30:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-07-23 15:30:59,201 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:30:59,201 INFO L353 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-07-23 15:30:59,201 INFO L414 AbstractCegarLoop]: === Iteration 97 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:30:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -150814804, now seen corresponding path program 96 times [2018-07-23 15:30:59,202 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:30:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:00,093 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:00,094 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-07-23 15:31:00,094 INFO L450 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-07-23 15:31:00,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-07-23 15:31:00,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:31:00,096 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-07-23 15:31:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:00,166 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 15:31:00,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-07-23 15:31:00,167 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-07-23 15:31:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:00,167 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:31:00,167 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:31:00,168 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:31:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:31:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-23 15:31:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 15:31:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 15:31:00,171 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-07-23 15:31:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:00,172 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 15:31:00,172 INFO L472 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-07-23 15:31:00,172 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 15:31:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 15:31:00,172 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:00,172 INFO L353 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-07-23 15:31:00,172 INFO L414 AbstractCegarLoop]: === Iteration 98 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash -380276249, now seen corresponding path program 97 times [2018-07-23 15:31:00,173 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:01,183 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:01,184 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-07-23 15:31:01,184 INFO L450 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-07-23 15:31:01,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-07-23 15:31:01,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:31:01,187 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-07-23 15:31:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:01,274 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-07-23 15:31:01,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-07-23 15:31:01,275 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-07-23 15:31:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:01,275 INFO L225 Difference]: With dead ends: 104 [2018-07-23 15:31:01,275 INFO L226 Difference]: Without dead ends: 102 [2018-07-23 15:31:01,276 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-07-23 15:31:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-07-23 15:31:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-07-23 15:31:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-07-23 15:31:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-07-23 15:31:01,280 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-07-23 15:31:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:01,280 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-07-23 15:31:01,280 INFO L472 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-07-23 15:31:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-07-23 15:31:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-23 15:31:01,281 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:01,281 INFO L353 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-07-23 15:31:01,281 INFO L414 AbstractCegarLoop]: === Iteration 99 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1096353548, now seen corresponding path program 98 times [2018-07-23 15:31:01,281 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:02,787 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:02,787 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-07-23 15:31:02,788 INFO L450 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-07-23 15:31:02,788 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-07-23 15:31:02,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:31:02,789 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-07-23 15:31:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:02,857 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-23 15:31:02,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-07-23 15:31:02,857 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-07-23 15:31:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:02,858 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:31:02,858 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:31:02,858 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:31:02,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:31:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:31:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:31:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-07-23 15:31:02,862 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-07-23 15:31:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:02,862 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-07-23 15:31:02,862 INFO L472 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-07-23 15:31:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-07-23 15:31:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:31:02,863 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:02,863 INFO L353 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-07-23 15:31:02,863 INFO L414 AbstractCegarLoop]: === Iteration 100 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:02,863 INFO L82 PathProgramCache]: Analyzing trace with hash -372763001, now seen corresponding path program 99 times [2018-07-23 15:31:02,863 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:03,782 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:03,783 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2018-07-23 15:31:03,783 INFO L450 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-07-23 15:31:03,784 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-07-23 15:31:03,784 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:31:03,784 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-07-23 15:31:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:03,849 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-07-23 15:31:03,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-07-23 15:31:03,849 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-07-23 15:31:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:03,850 INFO L225 Difference]: With dead ends: 106 [2018-07-23 15:31:03,850 INFO L226 Difference]: Without dead ends: 104 [2018-07-23 15:31:03,851 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-07-23 15:31:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-23 15:31:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-07-23 15:31:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-23 15:31:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-07-23 15:31:03,856 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-07-23 15:31:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:03,856 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-07-23 15:31:03,856 INFO L472 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-07-23 15:31:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-07-23 15:31:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-23 15:31:03,857 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:03,857 INFO L353 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-07-23 15:31:03,857 INFO L414 AbstractCegarLoop]: === Iteration 101 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:03,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1329264236, now seen corresponding path program 100 times [2018-07-23 15:31:03,858 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:04,886 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:04,886 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2018-07-23 15:31:04,886 INFO L450 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-07-23 15:31:04,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-07-23 15:31:04,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:31:04,888 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-07-23 15:31:04,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:04,958 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-23 15:31:04,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-07-23 15:31:04,959 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-07-23 15:31:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:04,960 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:31:04,960 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:31:04,961 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:31:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:31:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-23 15:31:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:31:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-07-23 15:31:04,966 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-07-23 15:31:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:04,966 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-07-23 15:31:04,967 INFO L472 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-07-23 15:31:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-07-23 15:31:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:31:04,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:04,967 INFO L353 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-07-23 15:31:04,968 INFO L414 AbstractCegarLoop]: === Iteration 102 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1742466265, now seen corresponding path program 101 times [2018-07-23 15:31:04,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:06,121 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:06,121 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2018-07-23 15:31:06,122 INFO L450 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-07-23 15:31:06,123 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-07-23 15:31:06,124 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:31:06,124 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-07-23 15:31:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:06,208 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-07-23 15:31:06,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-07-23 15:31:06,208 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-07-23 15:31:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:06,209 INFO L225 Difference]: With dead ends: 108 [2018-07-23 15:31:06,209 INFO L226 Difference]: Without dead ends: 106 [2018-07-23 15:31:06,210 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-07-23 15:31:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-07-23 15:31:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-07-23 15:31:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-07-23 15:31:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-07-23 15:31:06,216 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-07-23 15:31:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:06,216 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-07-23 15:31:06,216 INFO L472 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-07-23 15:31:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-07-23 15:31:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-23 15:31:06,217 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:06,217 INFO L353 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-07-23 15:31:06,217 INFO L414 AbstractCegarLoop]: === Iteration 103 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1818136012, now seen corresponding path program 102 times [2018-07-23 15:31:06,218 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:07,261 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:07,261 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2018-07-23 15:31:07,261 INFO L450 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-07-23 15:31:07,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-07-23 15:31:07,264 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:31:07,264 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-07-23 15:31:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:07,376 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 15:31:07,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-07-23 15:31:07,376 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-07-23 15:31:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:07,377 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:31:07,377 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:31:07,378 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:31:07,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:31:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 15:31:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 15:31:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 15:31:07,384 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-07-23 15:31:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:07,384 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 15:31:07,384 INFO L472 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-07-23 15:31:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 15:31:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 15:31:07,385 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:07,385 INFO L353 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-07-23 15:31:07,385 INFO L414 AbstractCegarLoop]: === Iteration 104 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:07,386 INFO L82 PathProgramCache]: Analyzing trace with hash 527656903, now seen corresponding path program 103 times [2018-07-23 15:31:07,386 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:08,656 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:08,656 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2018-07-23 15:31:08,657 INFO L450 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-07-23 15:31:08,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-07-23 15:31:08,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:31:08,659 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-07-23 15:31:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:08,778 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-07-23 15:31:08,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-07-23 15:31:08,779 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-07-23 15:31:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:08,779 INFO L225 Difference]: With dead ends: 110 [2018-07-23 15:31:08,779 INFO L226 Difference]: Without dead ends: 108 [2018-07-23 15:31:08,780 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-07-23 15:31:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-07-23 15:31:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-07-23 15:31:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-07-23 15:31:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-07-23 15:31:08,785 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-07-23 15:31:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:08,786 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-07-23 15:31:08,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-07-23 15:31:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-07-23 15:31:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-23 15:31:08,787 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:08,787 INFO L353 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-07-23 15:31:08,787 INFO L414 AbstractCegarLoop]: === Iteration 105 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:08,787 INFO L82 PathProgramCache]: Analyzing trace with hash -822489812, now seen corresponding path program 104 times [2018-07-23 15:31:08,787 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:09,858 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:09,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2018-07-23 15:31:09,858 INFO L450 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-07-23 15:31:09,859 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-07-23 15:31:09,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:31:09,860 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-07-23 15:31:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:09,936 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-23 15:31:09,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-07-23 15:31:09,936 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-07-23 15:31:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:09,937 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:31:09,937 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:31:09,938 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:31:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:31:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:31:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:31:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-07-23 15:31:09,944 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-07-23 15:31:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:09,944 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-07-23 15:31:09,944 INFO L472 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-07-23 15:31:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-07-23 15:31:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:31:09,945 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:09,945 INFO L353 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-07-23 15:31:09,945 INFO L414 AbstractCegarLoop]: === Iteration 106 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash 272634983, now seen corresponding path program 105 times [2018-07-23 15:31:09,946 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:11,144 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:11,144 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2018-07-23 15:31:11,144 INFO L450 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-07-23 15:31:11,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-07-23 15:31:11,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:31:11,145 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-07-23 15:31:11,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:11,210 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-07-23 15:31:11,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-07-23 15:31:11,210 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-07-23 15:31:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:11,211 INFO L225 Difference]: With dead ends: 112 [2018-07-23 15:31:11,211 INFO L226 Difference]: Without dead ends: 110 [2018-07-23 15:31:11,212 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-07-23 15:31:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-07-23 15:31:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-07-23 15:31:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-07-23 15:31:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-07-23 15:31:11,218 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-07-23 15:31:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:11,218 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-07-23 15:31:11,218 INFO L472 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-07-23 15:31:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-07-23 15:31:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-07-23 15:31:11,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:11,219 INFO L353 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-07-23 15:31:11,219 INFO L414 AbstractCegarLoop]: === Iteration 107 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash -138234740, now seen corresponding path program 106 times [2018-07-23 15:31:11,219 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:12,827 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:12,827 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2018-07-23 15:31:12,827 INFO L450 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-07-23 15:31:12,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-07-23 15:31:12,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:31:12,829 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-07-23 15:31:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:13,041 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-23 15:31:13,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-07-23 15:31:13,042 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-07-23 15:31:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:13,042 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:31:13,042 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:31:13,044 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:31:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:31:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-23 15:31:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:31:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-07-23 15:31:13,054 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-07-23 15:31:13,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:13,054 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-07-23 15:31:13,054 INFO L472 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-07-23 15:31:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-07-23 15:31:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:31:13,055 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:13,055 INFO L353 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-07-23 15:31:13,055 INFO L414 AbstractCegarLoop]: === Iteration 108 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:13,056 INFO L82 PathProgramCache]: Analyzing trace with hash 9705735, now seen corresponding path program 107 times [2018-07-23 15:31:13,056 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:14,440 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:14,440 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2018-07-23 15:31:14,440 INFO L450 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-07-23 15:31:14,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-07-23 15:31:14,443 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:31:14,443 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-07-23 15:31:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:14,628 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-07-23 15:31:14,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-07-23 15:31:14,628 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-07-23 15:31:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:14,629 INFO L225 Difference]: With dead ends: 114 [2018-07-23 15:31:14,629 INFO L226 Difference]: Without dead ends: 112 [2018-07-23 15:31:14,629 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-07-23 15:31:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-07-23 15:31:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-07-23 15:31:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-07-23 15:31:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-07-23 15:31:14,633 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-07-23 15:31:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:14,634 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-07-23 15:31:14,634 INFO L472 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-07-23 15:31:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-07-23 15:31:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-07-23 15:31:14,634 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:14,634 INFO L353 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-07-23 15:31:14,634 INFO L414 AbstractCegarLoop]: === Iteration 109 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:14,635 INFO L82 PathProgramCache]: Analyzing trace with hash 300893164, now seen corresponding path program 108 times [2018-07-23 15:31:14,635 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:16,010 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:16,010 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2018-07-23 15:31:16,010 INFO L450 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-07-23 15:31:16,011 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-07-23 15:31:16,012 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:31:16,012 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-07-23 15:31:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:16,120 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 15:31:16,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-07-23 15:31:16,120 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-07-23 15:31:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:16,120 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:31:16,121 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:31:16,121 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:31:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:31:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-23 15:31:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 15:31:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 15:31:16,126 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-07-23 15:31:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:16,127 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 15:31:16,127 INFO L472 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-07-23 15:31:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 15:31:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 15:31:16,127 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:16,128 INFO L353 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-07-23 15:31:16,128 INFO L414 AbstractCegarLoop]: === Iteration 110 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:16,128 INFO L82 PathProgramCache]: Analyzing trace with hash 737768871, now seen corresponding path program 109 times [2018-07-23 15:31:16,128 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:17,340 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:17,340 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2018-07-23 15:31:17,341 INFO L450 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-07-23 15:31:17,342 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-07-23 15:31:17,342 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:31:17,343 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-07-23 15:31:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:17,499 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-07-23 15:31:17,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-07-23 15:31:17,500 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-07-23 15:31:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:17,500 INFO L225 Difference]: With dead ends: 116 [2018-07-23 15:31:17,500 INFO L226 Difference]: Without dead ends: 114 [2018-07-23 15:31:17,501 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-07-23 15:31:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-07-23 15:31:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-07-23 15:31:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-07-23 15:31:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-07-23 15:31:17,505 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-07-23 15:31:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:17,505 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-07-23 15:31:17,505 INFO L472 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-07-23 15:31:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-07-23 15:31:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-23 15:31:17,506 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:17,506 INFO L353 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-07-23 15:31:17,506 INFO L414 AbstractCegarLoop]: === Iteration 111 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:17,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1396013900, now seen corresponding path program 110 times [2018-07-23 15:31:17,506 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:18,678 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:18,678 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2018-07-23 15:31:18,678 INFO L450 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-07-23 15:31:18,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-07-23 15:31:18,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:31:18,681 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-07-23 15:31:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:18,769 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-23 15:31:18,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-07-23 15:31:18,769 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-07-23 15:31:18,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:18,770 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:31:18,770 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:31:18,771 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:31:18,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:31:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:31:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:31:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-07-23 15:31:18,777 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-07-23 15:31:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:18,777 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-07-23 15:31:18,777 INFO L472 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-07-23 15:31:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-07-23 15:31:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:31:18,778 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:18,778 INFO L353 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-07-23 15:31:18,778 INFO L414 AbstractCegarLoop]: === Iteration 112 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash 326773319, now seen corresponding path program 111 times [2018-07-23 15:31:18,779 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:20,088 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:20,088 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2018-07-23 15:31:20,089 INFO L450 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-07-23 15:31:20,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-07-23 15:31:20,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:31:20,090 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-07-23 15:31:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:20,260 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-07-23 15:31:20,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-07-23 15:31:20,260 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-07-23 15:31:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:20,261 INFO L225 Difference]: With dead ends: 118 [2018-07-23 15:31:20,261 INFO L226 Difference]: Without dead ends: 116 [2018-07-23 15:31:20,261 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-07-23 15:31:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-07-23 15:31:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-07-23 15:31:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-07-23 15:31:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-07-23 15:31:20,267 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-07-23 15:31:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:20,267 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-07-23 15:31:20,268 INFO L472 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-07-23 15:31:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-07-23 15:31:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-07-23 15:31:20,268 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:20,268 INFO L353 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-07-23 15:31:20,268 INFO L414 AbstractCegarLoop]: === Iteration 113 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:20,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1540053676, now seen corresponding path program 112 times [2018-07-23 15:31:20,269 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:21,779 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:21,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2018-07-23 15:31:21,779 INFO L450 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-07-23 15:31:21,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-07-23 15:31:21,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:31:21,782 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-07-23 15:31:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:21,899 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-23 15:31:21,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-07-23 15:31:21,899 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-07-23 15:31:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:21,900 INFO L225 Difference]: With dead ends: 119 [2018-07-23 15:31:21,900 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:31:21,902 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:31:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:31:21,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-23 15:31:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:31:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-07-23 15:31:21,907 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-07-23 15:31:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:21,908 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-07-23 15:31:21,908 INFO L472 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-07-23 15:31:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-07-23 15:31:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:31:21,908 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:21,908 INFO L353 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-07-23 15:31:21,909 INFO L414 AbstractCegarLoop]: === Iteration 114 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:21,909 INFO L82 PathProgramCache]: Analyzing trace with hash 497039079, now seen corresponding path program 113 times [2018-07-23 15:31:21,909 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:23,214 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:23,214 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115] total 115 [2018-07-23 15:31:23,214 INFO L450 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-07-23 15:31:23,215 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-07-23 15:31:23,216 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:31:23,216 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-07-23 15:31:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:23,331 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-07-23 15:31:23,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-07-23 15:31:23,331 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-07-23 15:31:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:23,332 INFO L225 Difference]: With dead ends: 120 [2018-07-23 15:31:23,332 INFO L226 Difference]: Without dead ends: 118 [2018-07-23 15:31:23,333 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-07-23 15:31:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-07-23 15:31:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-07-23 15:31:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-07-23 15:31:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-07-23 15:31:23,338 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-07-23 15:31:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:23,338 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-07-23 15:31:23,338 INFO L472 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-07-23 15:31:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-07-23 15:31:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-23 15:31:23,339 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:23,339 INFO L353 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-07-23 15:31:23,339 INFO L414 AbstractCegarLoop]: === Iteration 115 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1771642356, now seen corresponding path program 114 times [2018-07-23 15:31:23,339 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:24,668 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:24,669 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2018-07-23 15:31:24,669 INFO L450 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-07-23 15:31:24,669 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-07-23 15:31:24,670 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:31:24,670 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-07-23 15:31:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:24,819 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 15:31:24,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-07-23 15:31:24,819 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-07-23 15:31:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:24,820 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:31:24,820 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:31:24,820 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:31:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:31:24,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 15:31:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 15:31:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 15:31:24,825 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-07-23 15:31:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:24,825 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 15:31:24,825 INFO L472 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-07-23 15:31:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 15:31:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 15:31:24,826 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:24,826 INFO L353 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-07-23 15:31:24,826 INFO L414 AbstractCegarLoop]: === Iteration 116 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash 913677191, now seen corresponding path program 115 times [2018-07-23 15:31:24,826 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:26,075 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:26,075 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117] total 117 [2018-07-23 15:31:26,075 INFO L450 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-07-23 15:31:26,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-07-23 15:31:26,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:31:26,077 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-07-23 15:31:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:26,200 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-07-23 15:31:26,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-23 15:31:26,200 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-07-23 15:31:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:26,201 INFO L225 Difference]: With dead ends: 122 [2018-07-23 15:31:26,201 INFO L226 Difference]: Without dead ends: 120 [2018-07-23 15:31:26,201 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-07-23 15:31:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-07-23 15:31:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-07-23 15:31:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-07-23 15:31:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-07-23 15:31:26,205 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-07-23 15:31:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:26,205 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-07-23 15:31:26,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-07-23 15:31:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-07-23 15:31:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-23 15:31:26,206 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:26,206 INFO L353 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-07-23 15:31:26,206 INFO L414 AbstractCegarLoop]: === Iteration 117 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:26,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1740762772, now seen corresponding path program 116 times [2018-07-23 15:31:26,206 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:27,518 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:27,518 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2018-07-23 15:31:27,519 INFO L450 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-07-23 15:31:27,520 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-07-23 15:31:27,520 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:31:27,521 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-07-23 15:31:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:27,642 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-23 15:31:27,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-07-23 15:31:27,642 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-07-23 15:31:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:27,642 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:31:27,643 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:31:27,643 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:31:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:31:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:31:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:31:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-07-23 15:31:27,647 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-07-23 15:31:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:27,647 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-07-23 15:31:27,647 INFO L472 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-07-23 15:31:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-07-23 15:31:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:31:27,648 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:27,648 INFO L353 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-07-23 15:31:27,648 INFO L414 AbstractCegarLoop]: === Iteration 118 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1870944295, now seen corresponding path program 117 times [2018-07-23 15:31:27,648 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:29,056 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:29,056 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119] total 119 [2018-07-23 15:31:29,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-07-23 15:31:29,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-07-23 15:31:29,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:31:29,059 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-07-23 15:31:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:29,240 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-07-23 15:31:29,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-07-23 15:31:29,241 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-07-23 15:31:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:29,241 INFO L225 Difference]: With dead ends: 124 [2018-07-23 15:31:29,241 INFO L226 Difference]: Without dead ends: 122 [2018-07-23 15:31:29,243 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-07-23 15:31:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-07-23 15:31:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-07-23 15:31:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-07-23 15:31:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-07-23 15:31:29,247 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-07-23 15:31:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:29,248 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-07-23 15:31:29,248 INFO L472 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-07-23 15:31:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-07-23 15:31:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-23 15:31:29,248 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:29,248 INFO L353 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-07-23 15:31:29,248 INFO L414 AbstractCegarLoop]: === Iteration 119 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2130253620, now seen corresponding path program 118 times [2018-07-23 15:31:29,249 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:30,647 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:30,647 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2018-07-23 15:31:30,647 INFO L450 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-07-23 15:31:30,648 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-07-23 15:31:30,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:31:30,649 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-07-23 15:31:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:30,826 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-23 15:31:30,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-07-23 15:31:30,826 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-07-23 15:31:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:30,827 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:31:30,827 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:31:30,828 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:31:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:31:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-23 15:31:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:31:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-07-23 15:31:30,834 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-07-23 15:31:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:30,834 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-07-23 15:31:30,834 INFO L472 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-07-23 15:31:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-07-23 15:31:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:31:30,835 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:30,835 INFO L353 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-07-23 15:31:30,835 INFO L414 AbstractCegarLoop]: === Iteration 120 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:30,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1613337401, now seen corresponding path program 119 times [2018-07-23 15:31:30,835 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:32,362 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:32,362 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121] total 121 [2018-07-23 15:31:32,362 INFO L450 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-07-23 15:31:32,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-07-23 15:31:32,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:31:32,364 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-07-23 15:31:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:32,448 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-07-23 15:31:32,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-07-23 15:31:32,448 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-07-23 15:31:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:32,449 INFO L225 Difference]: With dead ends: 126 [2018-07-23 15:31:32,449 INFO L226 Difference]: Without dead ends: 124 [2018-07-23 15:31:32,450 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-07-23 15:31:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-07-23 15:31:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-07-23 15:31:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-07-23 15:31:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-07-23 15:31:32,455 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-07-23 15:31:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:32,455 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-07-23 15:31:32,455 INFO L472 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-07-23 15:31:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-07-23 15:31:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-07-23 15:31:32,456 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:32,456 INFO L353 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-07-23 15:31:32,456 INFO L414 AbstractCegarLoop]: === Iteration 121 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1526163500, now seen corresponding path program 120 times [2018-07-23 15:31:32,457 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:33,882 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:33,882 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2018-07-23 15:31:33,882 INFO L450 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-07-23 15:31:33,883 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-07-23 15:31:33,884 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:31:33,884 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-07-23 15:31:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:34,048 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 15:31:34,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-07-23 15:31:34,048 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-07-23 15:31:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:34,048 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:31:34,048 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:31:34,049 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:31:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:31:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-23 15:31:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 15:31:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 15:31:34,053 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-07-23 15:31:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:34,054 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 15:31:34,054 INFO L472 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-07-23 15:31:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 15:31:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 15:31:34,054 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:34,054 INFO L353 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-07-23 15:31:34,055 INFO L414 AbstractCegarLoop]: === Iteration 122 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 66443623, now seen corresponding path program 121 times [2018-07-23 15:31:34,055 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:35,739 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:35,739 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123] total 123 [2018-07-23 15:31:35,739 INFO L450 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-07-23 15:31:35,741 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-07-23 15:31:35,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:31:35,742 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-07-23 15:31:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:35,854 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-07-23 15:31:35,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-07-23 15:31:35,854 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-07-23 15:31:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:35,855 INFO L225 Difference]: With dead ends: 128 [2018-07-23 15:31:35,855 INFO L226 Difference]: Without dead ends: 126 [2018-07-23 15:31:35,857 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-07-23 15:31:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-07-23 15:31:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-07-23 15:31:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-23 15:31:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-07-23 15:31:35,861 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-07-23 15:31:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:35,861 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-07-23 15:31:35,861 INFO L472 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-07-23 15:31:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-07-23 15:31:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-07-23 15:31:35,861 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:35,862 INFO L353 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-07-23 15:31:35,862 INFO L414 AbstractCegarLoop]: === Iteration 123 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:35,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2059767692, now seen corresponding path program 122 times [2018-07-23 15:31:35,862 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:37,447 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:37,447 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2018-07-23 15:31:37,447 INFO L450 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-07-23 15:31:37,448 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-07-23 15:31:37,448 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:31:37,448 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-07-23 15:31:37,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:37,650 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-23 15:31:37,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-07-23 15:31:37,651 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-07-23 15:31:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:37,651 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:31:37,651 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:31:37,652 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:31:37,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:31:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:31:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:31:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-07-23 15:31:37,655 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-07-23 15:31:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:37,656 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-07-23 15:31:37,656 INFO L472 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-07-23 15:31:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-07-23 15:31:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:31:37,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:37,656 INFO L353 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-07-23 15:31:37,656 INFO L414 AbstractCegarLoop]: === Iteration 124 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash -571695609, now seen corresponding path program 123 times [2018-07-23 15:31:37,657 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:39,173 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:39,173 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125] total 125 [2018-07-23 15:31:39,173 INFO L450 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-07-23 15:31:39,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-07-23 15:31:39,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:31:39,175 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-07-23 15:31:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:39,301 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-07-23 15:31:39,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-23 15:31:39,301 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-07-23 15:31:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:39,301 INFO L225 Difference]: With dead ends: 130 [2018-07-23 15:31:39,301 INFO L226 Difference]: Without dead ends: 128 [2018-07-23 15:31:39,302 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-07-23 15:31:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-23 15:31:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-07-23 15:31:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-07-23 15:31:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-07-23 15:31:39,306 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-07-23 15:31:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:39,306 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-07-23 15:31:39,306 INFO L472 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-07-23 15:31:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-07-23 15:31:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-23 15:31:39,307 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:39,307 INFO L353 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-07-23 15:31:39,307 INFO L414 AbstractCegarLoop]: === Iteration 125 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash -542679316, now seen corresponding path program 124 times [2018-07-23 15:31:39,307 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:40,862 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:40,862 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2018-07-23 15:31:40,862 INFO L450 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-07-23 15:31:40,863 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-07-23 15:31:40,864 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:31:40,864 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-07-23 15:31:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:41,081 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-23 15:31:41,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-07-23 15:31:41,081 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-07-23 15:31:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:41,081 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:31:41,082 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:31:41,083 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:31:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:31:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-23 15:31:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:31:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-07-23 15:31:41,087 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-07-23 15:31:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:41,087 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-07-23 15:31:41,087 INFO L472 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-07-23 15:31:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-07-23 15:31:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:31:41,088 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:41,088 INFO L353 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-07-23 15:31:41,088 INFO L414 AbstractCegarLoop]: === Iteration 126 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:41,088 INFO L82 PathProgramCache]: Analyzing trace with hash 356825767, now seen corresponding path program 125 times [2018-07-23 15:31:41,088 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:42,618 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:42,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2018-07-23 15:31:42,618 INFO L450 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-07-23 15:31:42,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-07-23 15:31:42,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:31:42,621 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-07-23 15:31:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:42,726 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-07-23 15:31:42,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-07-23 15:31:42,726 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-07-23 15:31:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:42,726 INFO L225 Difference]: With dead ends: 132 [2018-07-23 15:31:42,726 INFO L226 Difference]: Without dead ends: 130 [2018-07-23 15:31:42,728 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-07-23 15:31:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-07-23 15:31:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-07-23 15:31:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-07-23 15:31:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-07-23 15:31:42,732 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-07-23 15:31:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:42,732 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-07-23 15:31:42,732 INFO L472 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-07-23 15:31:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-07-23 15:31:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-07-23 15:31:42,733 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:42,733 INFO L353 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-07-23 15:31:42,733 INFO L414 AbstractCegarLoop]: === Iteration 127 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1823287732, now seen corresponding path program 126 times [2018-07-23 15:31:42,733 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:44,411 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:44,411 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2018-07-23 15:31:44,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-07-23 15:31:44,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-07-23 15:31:44,413 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:31:44,414 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-07-23 15:31:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:44,611 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 15:31:44,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-07-23 15:31:44,611 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-07-23 15:31:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:44,612 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:31:44,612 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:31:44,613 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:31:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:31:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 15:31:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 15:31:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 15:31:44,616 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-07-23 15:31:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:44,616 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 15:31:44,616 INFO L472 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-07-23 15:31:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 15:31:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 15:31:44,617 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:44,617 INFO L353 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-07-23 15:31:44,617 INFO L414 AbstractCegarLoop]: === Iteration 128 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:44,618 INFO L82 PathProgramCache]: Analyzing trace with hash -687329465, now seen corresponding path program 127 times [2018-07-23 15:31:44,618 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:46,375 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:46,375 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129] total 129 [2018-07-23 15:31:46,375 INFO L450 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-07-23 15:31:46,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-07-23 15:31:46,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:31:46,378 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-07-23 15:31:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:46,479 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-07-23 15:31:46,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-07-23 15:31:46,479 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-07-23 15:31:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:46,480 INFO L225 Difference]: With dead ends: 134 [2018-07-23 15:31:46,480 INFO L226 Difference]: Without dead ends: 132 [2018-07-23 15:31:46,482 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-07-23 15:31:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-07-23 15:31:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-07-23 15:31:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-07-23 15:31:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-07-23 15:31:46,487 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-07-23 15:31:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:46,487 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-07-23 15:31:46,487 INFO L472 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-07-23 15:31:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-07-23 15:31:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-07-23 15:31:46,488 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:46,488 INFO L353 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-07-23 15:31:46,488 INFO L414 AbstractCegarLoop]: === Iteration 129 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash 167638444, now seen corresponding path program 128 times [2018-07-23 15:31:46,488 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:48,114 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:48,114 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2018-07-23 15:31:48,114 INFO L450 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-07-23 15:31:48,116 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-07-23 15:31:48,117 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:31:48,117 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-07-23 15:31:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:48,326 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-23 15:31:48,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-07-23 15:31:48,326 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-07-23 15:31:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:48,327 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:31:48,327 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:31:48,328 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:31:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:31:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:31:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:31:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-07-23 15:31:48,332 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-07-23 15:31:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:48,332 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-07-23 15:31:48,332 INFO L472 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-07-23 15:31:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-07-23 15:31:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:31:48,333 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:48,333 INFO L353 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-07-23 15:31:48,333 INFO L414 AbstractCegarLoop]: === Iteration 130 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash 901839847, now seen corresponding path program 129 times [2018-07-23 15:31:48,333 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:50,168 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:50,168 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131] total 131 [2018-07-23 15:31:50,168 INFO L450 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-07-23 15:31:50,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-07-23 15:31:50,169 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:31:50,170 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-07-23 15:31:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:50,391 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-07-23 15:31:50,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-07-23 15:31:50,391 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-07-23 15:31:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:50,392 INFO L225 Difference]: With dead ends: 136 [2018-07-23 15:31:50,392 INFO L226 Difference]: Without dead ends: 134 [2018-07-23 15:31:50,393 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-07-23 15:31:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-07-23 15:31:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-07-23 15:31:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-07-23 15:31:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-07-23 15:31:50,396 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-07-23 15:31:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:50,397 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-07-23 15:31:50,397 INFO L472 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-07-23 15:31:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-07-23 15:31:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-23 15:31:50,397 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:50,397 INFO L353 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-07-23 15:31:50,397 INFO L414 AbstractCegarLoop]: === Iteration 131 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2107720436, now seen corresponding path program 130 times [2018-07-23 15:31:50,397 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:52,142 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:52,142 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2018-07-23 15:31:52,142 INFO L450 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-07-23 15:31:52,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-07-23 15:31:52,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:31:52,145 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-07-23 15:31:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:52,317 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-23 15:31:52,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-07-23 15:31:52,317 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-07-23 15:31:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:52,318 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:31:52,318 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:31:52,320 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:31:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:31:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-23 15:31:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:31:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-07-23 15:31:52,324 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-07-23 15:31:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:52,325 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-07-23 15:31:52,325 INFO L472 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-07-23 15:31:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-07-23 15:31:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:31:52,325 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:52,326 INFO L353 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-07-23 15:31:52,326 INFO L414 AbstractCegarLoop]: === Iteration 132 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:52,326 INFO L82 PathProgramCache]: Analyzing trace with hash -914808697, now seen corresponding path program 131 times [2018-07-23 15:31:52,326 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:54,270 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:54,270 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133] total 133 [2018-07-23 15:31:54,270 INFO L450 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-07-23 15:31:54,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-07-23 15:31:54,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:31:54,271 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-07-23 15:31:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:54,493 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-07-23 15:31:54,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-07-23 15:31:54,493 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-07-23 15:31:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:54,493 INFO L225 Difference]: With dead ends: 138 [2018-07-23 15:31:54,493 INFO L226 Difference]: Without dead ends: 136 [2018-07-23 15:31:54,494 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-07-23 15:31:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-07-23 15:31:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-07-23 15:31:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-07-23 15:31:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-07-23 15:31:54,500 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-07-23 15:31:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:54,501 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-07-23 15:31:54,501 INFO L472 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-07-23 15:31:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-07-23 15:31:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-23 15:31:54,502 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:54,502 INFO L353 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-07-23 15:31:54,502 INFO L414 AbstractCegarLoop]: === Iteration 133 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1705716844, now seen corresponding path program 132 times [2018-07-23 15:31:54,502 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:56,281 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:56,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2018-07-23 15:31:56,281 INFO L450 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-07-23 15:31:56,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-07-23 15:31:56,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:31:56,284 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-07-23 15:31:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:56,484 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 15:31:56,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-07-23 15:31:56,484 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-07-23 15:31:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:56,485 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:31:56,485 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:31:56,487 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:31:56,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:31:56,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-23 15:31:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 15:31:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 15:31:56,493 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-07-23 15:31:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:56,493 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 15:31:56,493 INFO L472 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-07-23 15:31:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 15:31:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 15:31:56,494 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:56,494 INFO L353 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-07-23 15:31:56,494 INFO L414 AbstractCegarLoop]: === Iteration 134 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:56,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1337629991, now seen corresponding path program 133 times [2018-07-23 15:31:56,494 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:31:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:31:58,411 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:31:58,411 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135] total 135 [2018-07-23 15:31:58,411 INFO L450 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-07-23 15:31:58,412 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-07-23 15:31:58,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:31:58,412 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-07-23 15:31:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:31:58,584 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-07-23 15:31:58,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-07-23 15:31:58,584 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-07-23 15:31:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:31:58,585 INFO L225 Difference]: With dead ends: 140 [2018-07-23 15:31:58,585 INFO L226 Difference]: Without dead ends: 138 [2018-07-23 15:31:58,586 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-07-23 15:31:58,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-07-23 15:31:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-07-23 15:31:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-07-23 15:31:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-07-23 15:31:58,592 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-07-23 15:31:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:31:58,592 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-07-23 15:31:58,593 INFO L472 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-07-23 15:31:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-07-23 15:31:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-23 15:31:58,593 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:31:58,593 INFO L353 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-07-23 15:31:58,593 INFO L414 AbstractCegarLoop]: === Iteration 135 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:31:58,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1483127860, now seen corresponding path program 134 times [2018-07-23 15:31:58,594 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:31:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:00,458 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:00,459 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2018-07-23 15:32:00,459 INFO L450 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-07-23 15:32:00,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-07-23 15:32:00,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:32:00,461 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-07-23 15:32:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:00,704 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-23 15:32:00,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-07-23 15:32:00,705 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-07-23 15:32:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:00,705 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:32:00,705 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:32:00,707 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:32:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:32:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:32:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:32:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-07-23 15:32:00,710 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-07-23 15:32:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:00,711 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-07-23 15:32:00,711 INFO L472 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-07-23 15:32:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-07-23 15:32:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:32:00,711 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:00,711 INFO L353 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-07-23 15:32:00,711 INFO L414 AbstractCegarLoop]: === Iteration 136 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:00,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1267691975, now seen corresponding path program 135 times [2018-07-23 15:32:00,712 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:02,738 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:02,738 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137] total 137 [2018-07-23 15:32:02,739 INFO L450 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-07-23 15:32:02,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-07-23 15:32:02,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:32:02,741 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-07-23 15:32:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:03,032 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-07-23 15:32:03,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-07-23 15:32:03,033 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-07-23 15:32:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:03,033 INFO L225 Difference]: With dead ends: 142 [2018-07-23 15:32:03,033 INFO L226 Difference]: Without dead ends: 140 [2018-07-23 15:32:03,034 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-07-23 15:32:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-07-23 15:32:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-07-23 15:32:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-07-23 15:32:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-07-23 15:32:03,038 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-07-23 15:32:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:03,038 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-07-23 15:32:03,038 INFO L472 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-07-23 15:32:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-07-23 15:32:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-23 15:32:03,038 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:03,039 INFO L353 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-07-23 15:32:03,039 INFO L414 AbstractCegarLoop]: === Iteration 137 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash 643760940, now seen corresponding path program 136 times [2018-07-23 15:32:03,039 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:05,070 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:05,070 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2018-07-23 15:32:05,070 INFO L450 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-07-23 15:32:05,072 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-07-23 15:32:05,072 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:32:05,073 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-07-23 15:32:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:05,196 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-23 15:32:05,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-07-23 15:32:05,196 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-07-23 15:32:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:05,197 INFO L225 Difference]: With dead ends: 143 [2018-07-23 15:32:05,197 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:32:05,198 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:32:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:32:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-23 15:32:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:32:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-07-23 15:32:05,202 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-07-23 15:32:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:05,202 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-07-23 15:32:05,202 INFO L472 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-07-23 15:32:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-07-23 15:32:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:32:05,202 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:05,202 INFO L353 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-07-23 15:32:05,203 INFO L414 AbstractCegarLoop]: === Iteration 138 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1518231961, now seen corresponding path program 137 times [2018-07-23 15:32:05,203 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:07,299 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:07,299 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139] total 139 [2018-07-23 15:32:07,300 INFO L450 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-07-23 15:32:07,301 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-07-23 15:32:07,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:32:07,302 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-07-23 15:32:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:07,562 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-07-23 15:32:07,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-07-23 15:32:07,562 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-07-23 15:32:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:07,563 INFO L225 Difference]: With dead ends: 144 [2018-07-23 15:32:07,563 INFO L226 Difference]: Without dead ends: 142 [2018-07-23 15:32:07,564 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-07-23 15:32:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-07-23 15:32:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-07-23 15:32:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-07-23 15:32:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-07-23 15:32:07,567 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-07-23 15:32:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:07,568 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-07-23 15:32:07,568 INFO L472 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-07-23 15:32:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-07-23 15:32:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-23 15:32:07,568 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:07,568 INFO L353 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-07-23 15:32:07,568 INFO L414 AbstractCegarLoop]: === Iteration 139 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:07,568 INFO L82 PathProgramCache]: Analyzing trace with hash 179464844, now seen corresponding path program 138 times [2018-07-23 15:32:07,569 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:09,546 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:09,546 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2018-07-23 15:32:09,546 INFO L450 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-07-23 15:32:09,548 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-07-23 15:32:09,549 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:32:09,549 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-07-23 15:32:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:09,823 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 15:32:09,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-07-23 15:32:09,824 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-07-23 15:32:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:09,824 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:32:09,824 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:32:09,825 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:32:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:32:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 15:32:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 15:32:09,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 15:32:09,829 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-07-23 15:32:09,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:09,830 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 15:32:09,830 INFO L472 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-07-23 15:32:09,830 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 15:32:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 15:32:09,831 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:09,831 INFO L353 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-07-23 15:32:09,831 INFO L414 AbstractCegarLoop]: === Iteration 140 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1268458247, now seen corresponding path program 139 times [2018-07-23 15:32:09,831 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:11,953 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:11,953 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141] total 141 [2018-07-23 15:32:11,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-07-23 15:32:11,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-07-23 15:32:11,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:32:11,955 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-07-23 15:32:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:12,286 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-07-23 15:32:12,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-07-23 15:32:12,286 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-07-23 15:32:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:12,287 INFO L225 Difference]: With dead ends: 146 [2018-07-23 15:32:12,287 INFO L226 Difference]: Without dead ends: 144 [2018-07-23 15:32:12,288 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-07-23 15:32:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-07-23 15:32:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-07-23 15:32:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-23 15:32:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-07-23 15:32:12,294 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-07-23 15:32:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:12,294 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-07-23 15:32:12,294 INFO L472 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-07-23 15:32:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-07-23 15:32:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-07-23 15:32:12,295 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:12,295 INFO L353 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-07-23 15:32:12,295 INFO L414 AbstractCegarLoop]: === Iteration 141 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:12,296 INFO L82 PathProgramCache]: Analyzing trace with hash 667515372, now seen corresponding path program 140 times [2018-07-23 15:32:12,296 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:14,323 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:14,323 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2018-07-23 15:32:14,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-07-23 15:32:14,325 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-07-23 15:32:14,326 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:32:14,326 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-07-23 15:32:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:14,596 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-23 15:32:14,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-07-23 15:32:14,596 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-07-23 15:32:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:14,597 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:32:14,597 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:32:14,598 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:32:14,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:32:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:32:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:32:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-07-23 15:32:14,603 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-07-23 15:32:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:14,604 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-07-23 15:32:14,604 INFO L472 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-07-23 15:32:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-07-23 15:32:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:32:14,604 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:14,605 INFO L353 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-07-23 15:32:14,605 INFO L414 AbstractCegarLoop]: === Iteration 142 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -781844569, now seen corresponding path program 141 times [2018-07-23 15:32:14,605 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:16,957 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:16,957 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143] total 143 [2018-07-23 15:32:16,957 INFO L450 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-07-23 15:32:16,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-07-23 15:32:16,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:32:16,959 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-07-23 15:32:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:17,099 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-07-23 15:32:17,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-07-23 15:32:17,099 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-07-23 15:32:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:17,099 INFO L225 Difference]: With dead ends: 148 [2018-07-23 15:32:17,099 INFO L226 Difference]: Without dead ends: 146 [2018-07-23 15:32:17,100 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-07-23 15:32:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-07-23 15:32:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-07-23 15:32:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-07-23 15:32:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-07-23 15:32:17,104 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-07-23 15:32:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:17,104 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-07-23 15:32:17,104 INFO L472 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-07-23 15:32:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-07-23 15:32:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-23 15:32:17,105 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:17,105 INFO L353 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-07-23 15:32:17,105 INFO L414 AbstractCegarLoop]: === Iteration 143 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1532637516, now seen corresponding path program 142 times [2018-07-23 15:32:17,105 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:19,223 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:19,223 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2018-07-23 15:32:19,223 INFO L450 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-07-23 15:32:19,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-07-23 15:32:19,226 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:32:19,226 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-07-23 15:32:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:19,399 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-23 15:32:19,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-07-23 15:32:19,399 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-07-23 15:32:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:19,399 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:32:19,400 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:32:19,401 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:32:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:32:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-23 15:32:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:32:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-07-23 15:32:19,405 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-07-23 15:32:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:19,405 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-07-23 15:32:19,406 INFO L472 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-07-23 15:32:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-07-23 15:32:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:32:19,406 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:19,406 INFO L353 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-07-23 15:32:19,406 INFO L414 AbstractCegarLoop]: === Iteration 144 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:19,406 INFO L82 PathProgramCache]: Analyzing trace with hash 267138119, now seen corresponding path program 143 times [2018-07-23 15:32:19,406 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:21,611 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:21,611 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145] total 145 [2018-07-23 15:32:21,612 INFO L450 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-07-23 15:32:21,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-07-23 15:32:21,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:32:21,614 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-07-23 15:32:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:21,908 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-07-23 15:32:21,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-07-23 15:32:21,909 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-07-23 15:32:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:21,909 INFO L225 Difference]: With dead ends: 150 [2018-07-23 15:32:21,909 INFO L226 Difference]: Without dead ends: 148 [2018-07-23 15:32:21,910 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-07-23 15:32:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-07-23 15:32:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-07-23 15:32:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-07-23 15:32:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-07-23 15:32:21,914 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-07-23 15:32:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:21,914 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-07-23 15:32:21,914 INFO L472 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-07-23 15:32:21,914 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-07-23 15:32:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-23 15:32:21,915 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:21,915 INFO L353 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-07-23 15:32:21,915 INFO L414 AbstractCegarLoop]: === Iteration 145 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:21,915 INFO L82 PathProgramCache]: Analyzing trace with hash -308637524, now seen corresponding path program 144 times [2018-07-23 15:32:21,915 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:24,140 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:24,140 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2018-07-23 15:32:24,140 INFO L450 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-07-23 15:32:24,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-07-23 15:32:24,143 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:32:24,143 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-07-23 15:32:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:24,499 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 15:32:24,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-07-23 15:32:24,499 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-07-23 15:32:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:24,499 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:32:24,499 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:32:24,501 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:32:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:32:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-23 15:32:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 15:32:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 15:32:24,505 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-07-23 15:32:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:24,505 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 15:32:24,505 INFO L472 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-07-23 15:32:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 15:32:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 15:32:24,506 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:24,506 INFO L353 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-07-23 15:32:24,506 INFO L414 AbstractCegarLoop]: === Iteration 146 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash -977813273, now seen corresponding path program 145 times [2018-07-23 15:32:24,506 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:26,619 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:26,619 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147] total 147 [2018-07-23 15:32:26,619 INFO L450 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-07-23 15:32:26,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-07-23 15:32:26,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:32:26,622 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-07-23 15:32:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:26,985 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-07-23 15:32:26,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-07-23 15:32:26,985 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-07-23 15:32:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:26,985 INFO L225 Difference]: With dead ends: 152 [2018-07-23 15:32:26,986 INFO L226 Difference]: Without dead ends: 150 [2018-07-23 15:32:26,987 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-07-23 15:32:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-07-23 15:32:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-07-23 15:32:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-07-23 15:32:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-07-23 15:32:26,992 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-07-23 15:32:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:26,992 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-07-23 15:32:26,992 INFO L472 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-07-23 15:32:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-07-23 15:32:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-23 15:32:26,993 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:26,993 INFO L353 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-07-23 15:32:26,993 INFO L414 AbstractCegarLoop]: === Iteration 147 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:26,994 INFO L82 PathProgramCache]: Analyzing trace with hash -247425012, now seen corresponding path program 146 times [2018-07-23 15:32:26,994 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:29,509 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:29,509 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2018-07-23 15:32:29,510 INFO L450 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-07-23 15:32:29,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-07-23 15:32:29,511 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:32:29,511 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-07-23 15:32:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:29,864 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-23 15:32:29,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-07-23 15:32:29,864 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-07-23 15:32:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:29,865 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:32:29,865 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:32:29,865 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:32:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:32:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:32:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:32:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-07-23 15:32:29,872 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-07-23 15:32:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:29,872 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-07-23 15:32:29,872 INFO L472 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-07-23 15:32:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-07-23 15:32:29,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:32:29,873 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:29,873 INFO L353 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-07-23 15:32:29,873 INFO L414 AbstractCegarLoop]: === Iteration 148 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 919774599, now seen corresponding path program 147 times [2018-07-23 15:32:29,873 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:32,251 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:32,251 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149] total 149 [2018-07-23 15:32:32,251 INFO L450 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-07-23 15:32:32,252 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-07-23 15:32:32,253 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:32:32,254 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-07-23 15:32:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:32,631 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-07-23 15:32:32,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-07-23 15:32:32,631 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-07-23 15:32:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:32,631 INFO L225 Difference]: With dead ends: 154 [2018-07-23 15:32:32,631 INFO L226 Difference]: Without dead ends: 152 [2018-07-23 15:32:32,633 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-07-23 15:32:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-07-23 15:32:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-07-23 15:32:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-07-23 15:32:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-07-23 15:32:32,637 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-07-23 15:32:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:32,637 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-07-23 15:32:32,637 INFO L472 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-07-23 15:32:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-07-23 15:32:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-23 15:32:32,637 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:32,638 INFO L353 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-07-23 15:32:32,638 INFO L414 AbstractCegarLoop]: === Iteration 149 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:32,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1551743124, now seen corresponding path program 148 times [2018-07-23 15:32:32,638 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:35,081 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:35,081 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2018-07-23 15:32:35,082 INFO L450 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-07-23 15:32:35,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-07-23 15:32:35,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:32:35,084 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-07-23 15:32:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:35,491 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-23 15:32:35,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-07-23 15:32:35,491 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-07-23 15:32:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:35,492 INFO L225 Difference]: With dead ends: 155 [2018-07-23 15:32:35,492 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:32:35,493 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:32:35,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:32:35,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-23 15:32:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:32:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-07-23 15:32:35,497 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-07-23 15:32:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:35,497 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-07-23 15:32:35,497 INFO L472 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-07-23 15:32:35,497 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-07-23 15:32:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:32:35,497 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:35,498 INFO L353 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-07-23 15:32:35,498 INFO L414 AbstractCegarLoop]: === Iteration 150 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash -859381209, now seen corresponding path program 149 times [2018-07-23 15:32:35,498 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:37,934 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:37,934 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151] total 151 [2018-07-23 15:32:37,935 INFO L450 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-07-23 15:32:37,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-07-23 15:32:37,938 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:32:37,938 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-07-23 15:32:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:38,374 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-07-23 15:32:38,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-07-23 15:32:38,374 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-07-23 15:32:38,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:38,375 INFO L225 Difference]: With dead ends: 156 [2018-07-23 15:32:38,375 INFO L226 Difference]: Without dead ends: 154 [2018-07-23 15:32:38,378 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-07-23 15:32:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-07-23 15:32:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-07-23 15:32:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-07-23 15:32:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-07-23 15:32:38,385 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-07-23 15:32:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:38,385 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-07-23 15:32:38,385 INFO L472 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-07-23 15:32:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-07-23 15:32:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-07-23 15:32:38,386 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:38,386 INFO L353 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-07-23 15:32:38,386 INFO L414 AbstractCegarLoop]: === Iteration 151 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash -870998324, now seen corresponding path program 150 times [2018-07-23 15:32:38,386 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:40,740 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:40,740 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2018-07-23 15:32:40,740 INFO L450 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-07-23 15:32:40,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-07-23 15:32:40,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:32:40,743 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-07-23 15:32:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:41,189 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 15:32:41,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-07-23 15:32:41,189 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-07-23 15:32:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:41,190 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:32:41,190 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:32:41,191 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:32:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:32:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 15:32:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 15:32:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 15:32:41,196 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-07-23 15:32:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:41,196 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 15:32:41,196 INFO L472 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-07-23 15:32:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 15:32:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 15:32:41,196 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:41,196 INFO L353 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-07-23 15:32:41,197 INFO L414 AbstractCegarLoop]: === Iteration 152 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:41,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1231128889, now seen corresponding path program 151 times [2018-07-23 15:32:41,197 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:43,939 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:43,939 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153] total 153 [2018-07-23 15:32:43,939 INFO L450 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-07-23 15:32:43,941 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-07-23 15:32:43,941 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:32:43,942 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-07-23 15:32:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:44,368 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-07-23 15:32:44,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-07-23 15:32:44,368 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-07-23 15:32:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:44,369 INFO L225 Difference]: With dead ends: 158 [2018-07-23 15:32:44,369 INFO L226 Difference]: Without dead ends: 156 [2018-07-23 15:32:44,370 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-07-23 15:32:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-07-23 15:32:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-07-23 15:32:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-07-23 15:32:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-07-23 15:32:44,374 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-07-23 15:32:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:44,374 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-07-23 15:32:44,374 INFO L472 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-07-23 15:32:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-07-23 15:32:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-23 15:32:44,375 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:44,375 INFO L353 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-07-23 15:32:44,375 INFO L414 AbstractCegarLoop]: === Iteration 153 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:44,375 INFO L82 PathProgramCache]: Analyzing trace with hash 489725484, now seen corresponding path program 152 times [2018-07-23 15:32:44,375 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:47,047 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:47,047 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2018-07-23 15:32:47,048 INFO L450 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-07-23 15:32:47,050 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-07-23 15:32:47,051 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:32:47,051 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-07-23 15:32:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:47,490 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-23 15:32:47,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-07-23 15:32:47,490 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-07-23 15:32:47,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:47,490 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:32:47,490 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:32:47,492 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:32:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:32:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:32:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:32:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-07-23 15:32:47,498 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-07-23 15:32:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:47,499 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-07-23 15:32:47,499 INFO L472 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-07-23 15:32:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-07-23 15:32:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:32:47,499 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:47,500 INFO L353 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-07-23 15:32:47,500 INFO L414 AbstractCegarLoop]: === Iteration 154 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:47,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1998363801, now seen corresponding path program 153 times [2018-07-23 15:32:47,500 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:50,189 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:50,189 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155] total 155 [2018-07-23 15:32:50,189 INFO L450 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-07-23 15:32:50,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-07-23 15:32:50,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:32:50,193 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-07-23 15:32:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:50,641 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-07-23 15:32:50,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-07-23 15:32:50,641 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-07-23 15:32:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:50,641 INFO L225 Difference]: With dead ends: 160 [2018-07-23 15:32:50,641 INFO L226 Difference]: Without dead ends: 158 [2018-07-23 15:32:50,643 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-07-23 15:32:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-07-23 15:32:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-07-23 15:32:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-07-23 15:32:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-07-23 15:32:50,647 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-07-23 15:32:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:50,647 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-07-23 15:32:50,647 INFO L472 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-07-23 15:32:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-07-23 15:32:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-07-23 15:32:50,648 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:50,648 INFO L353 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-07-23 15:32:50,648 INFO L414 AbstractCegarLoop]: === Iteration 155 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1819720308, now seen corresponding path program 154 times [2018-07-23 15:32:50,648 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:53,519 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:53,519 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2018-07-23 15:32:53,520 INFO L450 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-07-23 15:32:53,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-07-23 15:32:53,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:32:53,523 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-07-23 15:32:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:53,922 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-23 15:32:53,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-07-23 15:32:53,922 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-07-23 15:32:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:53,923 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:32:53,923 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:32:53,924 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:32:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:32:53,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-23 15:32:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:32:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-07-23 15:32:53,928 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-07-23 15:32:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:53,928 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-07-23 15:32:53,928 INFO L472 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-07-23 15:32:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-07-23 15:32:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:32:53,928 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:53,929 INFO L353 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-07-23 15:32:53,929 INFO L414 AbstractCegarLoop]: === Iteration 156 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -576739321, now seen corresponding path program 155 times [2018-07-23 15:32:53,929 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:56,716 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:56,717 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157] total 157 [2018-07-23 15:32:56,717 INFO L450 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-07-23 15:32:56,719 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-07-23 15:32:56,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:32:56,720 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-07-23 15:32:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:32:56,970 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-07-23 15:32:56,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-07-23 15:32:56,970 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-07-23 15:32:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:32:56,970 INFO L225 Difference]: With dead ends: 162 [2018-07-23 15:32:56,970 INFO L226 Difference]: Without dead ends: 160 [2018-07-23 15:32:56,972 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-07-23 15:32:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-07-23 15:32:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-07-23 15:32:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-07-23 15:32:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-07-23 15:32:56,976 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-07-23 15:32:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:32:56,976 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-07-23 15:32:56,976 INFO L472 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-07-23 15:32:56,976 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-07-23 15:32:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-23 15:32:56,977 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:32:56,977 INFO L353 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-07-23 15:32:56,977 INFO L414 AbstractCegarLoop]: === Iteration 157 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:32:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash -699034388, now seen corresponding path program 156 times [2018-07-23 15:32:56,977 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:32:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:32:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:32:59,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:32:59,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2018-07-23 15:32:59,813 INFO L450 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-07-23 15:32:59,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-07-23 15:32:59,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:32:59,817 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-07-23 15:33:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:00,002 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 15:33:00,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-07-23 15:33:00,002 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-07-23 15:33:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:00,003 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:33:00,003 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:33:00,005 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:33:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:33:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-23 15:33:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 15:33:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 15:33:00,009 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-07-23 15:33:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:00,009 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 15:33:00,009 INFO L472 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-07-23 15:33:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 15:33:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 15:33:00,010 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:00,010 INFO L353 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-07-23 15:33:00,010 INFO L414 AbstractCegarLoop]: === Iteration 158 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash -195214169, now seen corresponding path program 157 times [2018-07-23 15:33:00,010 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:03,011 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:03,011 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159] total 159 [2018-07-23 15:33:03,011 INFO L450 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-07-23 15:33:03,013 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-07-23 15:33:03,014 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:33:03,014 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-07-23 15:33:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:03,342 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-07-23 15:33:03,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-07-23 15:33:03,342 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-07-23 15:33:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:03,342 INFO L225 Difference]: With dead ends: 164 [2018-07-23 15:33:03,342 INFO L226 Difference]: Without dead ends: 162 [2018-07-23 15:33:03,344 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-07-23 15:33:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-07-23 15:33:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-07-23 15:33:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-07-23 15:33:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-07-23 15:33:03,348 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-07-23 15:33:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:03,348 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-07-23 15:33:03,348 INFO L472 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-07-23 15:33:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-07-23 15:33:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-07-23 15:33:03,348 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:03,349 INFO L353 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-07-23 15:33:03,349 INFO L414 AbstractCegarLoop]: === Iteration 159 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1756656564, now seen corresponding path program 158 times [2018-07-23 15:33:03,349 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:06,321 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:06,321 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160] total 160 [2018-07-23 15:33:06,321 INFO L450 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-07-23 15:33:06,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-07-23 15:33:06,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:33:06,324 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-07-23 15:33:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:06,894 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-23 15:33:06,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-07-23 15:33:06,895 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-07-23 15:33:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:06,895 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:33:06,895 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:33:06,898 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:33:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:33:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:33:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:33:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-07-23 15:33:06,903 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-07-23 15:33:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:06,904 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-07-23 15:33:06,904 INFO L472 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-07-23 15:33:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-07-23 15:33:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:33:06,904 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:06,905 INFO L353 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-07-23 15:33:06,905 INFO L414 AbstractCegarLoop]: === Iteration 160 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1378236743, now seen corresponding path program 159 times [2018-07-23 15:33:06,905 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:09,603 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:09,604 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161] total 161 [2018-07-23 15:33:09,604 INFO L450 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-07-23 15:33:09,606 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-07-23 15:33:09,607 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:33:09,607 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-07-23 15:33:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:10,123 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-07-23 15:33:10,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-07-23 15:33:10,123 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-07-23 15:33:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:10,124 INFO L225 Difference]: With dead ends: 166 [2018-07-23 15:33:10,124 INFO L226 Difference]: Without dead ends: 164 [2018-07-23 15:33:10,126 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-07-23 15:33:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-07-23 15:33:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-07-23 15:33:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-07-23 15:33:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-07-23 15:33:10,133 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-07-23 15:33:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:10,133 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-07-23 15:33:10,133 INFO L472 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-07-23 15:33:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-07-23 15:33:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-07-23 15:33:10,134 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:10,134 INFO L353 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-07-23 15:33:10,134 INFO L414 AbstractCegarLoop]: === Iteration 161 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash -224318548, now seen corresponding path program 160 times [2018-07-23 15:33:10,134 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:13,247 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:13,248 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162] total 162 [2018-07-23 15:33:13,248 INFO L450 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-07-23 15:33:13,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-07-23 15:33:13,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:33:13,251 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 163 states. [2018-07-23 15:33:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:13,712 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-23 15:33:13,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-07-23 15:33:13,712 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 163 [2018-07-23 15:33:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:13,713 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:33:13,713 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:33:13,714 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:33:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:33:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-23 15:33:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:33:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-07-23 15:33:13,719 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-07-23 15:33:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:13,719 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-07-23 15:33:13,719 INFO L472 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-07-23 15:33:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-07-23 15:33:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:33:13,719 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:13,719 INFO L353 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-07-23 15:33:13,719 INFO L414 AbstractCegarLoop]: === Iteration 162 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1636074983, now seen corresponding path program 161 times [2018-07-23 15:33:13,720 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:17,033 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:17,033 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163] total 163 [2018-07-23 15:33:17,034 INFO L450 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-07-23 15:33:17,035 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-07-23 15:33:17,036 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:33:17,036 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 164 states. [2018-07-23 15:33:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:17,215 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-07-23 15:33:17,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-07-23 15:33:17,215 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 164 [2018-07-23 15:33:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:17,216 INFO L225 Difference]: With dead ends: 168 [2018-07-23 15:33:17,216 INFO L226 Difference]: Without dead ends: 166 [2018-07-23 15:33:17,218 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-07-23 15:33:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-07-23 15:33:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-07-23 15:33:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-07-23 15:33:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-07-23 15:33:17,225 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-07-23 15:33:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:17,225 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-07-23 15:33:17,226 INFO L472 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-07-23 15:33:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-07-23 15:33:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-23 15:33:17,226 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:17,227 INFO L353 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-07-23 15:33:17,227 INFO L414 AbstractCegarLoop]: === Iteration 163 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:17,227 INFO L82 PathProgramCache]: Analyzing trace with hash -821267700, now seen corresponding path program 162 times [2018-07-23 15:33:17,227 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:20,797 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:20,798 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164] total 164 [2018-07-23 15:33:20,798 INFO L450 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-07-23 15:33:20,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-07-23 15:33:20,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:33:20,802 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 165 states. [2018-07-23 15:33:21,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:21,391 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 15:33:21,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-07-23 15:33:21,391 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 165 [2018-07-23 15:33:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:21,392 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:33:21,392 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:33:21,395 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:33:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:33:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 15:33:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 15:33:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 15:33:21,400 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-07-23 15:33:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:21,400 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 15:33:21,400 INFO L472 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-07-23 15:33:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 15:33:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 15:33:21,401 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:21,401 INFO L353 BasicCegarLoop]: trace histogram [163, 1, 1, 1] [2018-07-23 15:33:21,401 INFO L414 AbstractCegarLoop]: === Iteration 164 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash 310520455, now seen corresponding path program 163 times [2018-07-23 15:33:21,401 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:24,534 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:24,534 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165] total 165 [2018-07-23 15:33:24,534 INFO L450 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-07-23 15:33:24,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-07-23 15:33:24,538 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:33:24,538 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 166 states. [2018-07-23 15:33:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:25,109 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-07-23 15:33:25,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-07-23 15:33:25,110 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-07-23 15:33:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:25,110 INFO L225 Difference]: With dead ends: 170 [2018-07-23 15:33:25,110 INFO L226 Difference]: Without dead ends: 168 [2018-07-23 15:33:25,112 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-07-23 15:33:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-07-23 15:33:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-07-23 15:33:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-07-23 15:33:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-07-23 15:33:25,117 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-07-23 15:33:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:25,117 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-07-23 15:33:25,117 INFO L472 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-07-23 15:33:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-07-23 15:33:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-07-23 15:33:25,117 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:25,117 INFO L353 BasicCegarLoop]: trace histogram [164, 1, 1, 1] [2018-07-23 15:33:25,118 INFO L414 AbstractCegarLoop]: === Iteration 165 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:25,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1036214892, now seen corresponding path program 164 times [2018-07-23 15:33:25,118 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:28,365 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:28,365 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166] total 166 [2018-07-23 15:33:28,365 INFO L450 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-07-23 15:33:28,367 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-07-23 15:33:28,368 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:33:28,368 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 167 states. [2018-07-23 15:33:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:28,764 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-23 15:33:28,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-07-23 15:33:28,764 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 167 [2018-07-23 15:33:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:28,765 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:33:28,765 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:33:28,766 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:33:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:33:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:33:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:33:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-07-23 15:33:28,771 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-07-23 15:33:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:28,771 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-07-23 15:33:28,771 INFO L472 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-07-23 15:33:28,771 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-07-23 15:33:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:33:28,772 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:28,772 INFO L353 BasicCegarLoop]: trace histogram [165, 1, 1, 1] [2018-07-23 15:33:28,772 INFO L414 AbstractCegarLoop]: === Iteration 166 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:28,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2057905959, now seen corresponding path program 165 times [2018-07-23 15:33:28,772 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:32,057 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:32,057 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167] total 167 [2018-07-23 15:33:32,058 INFO L450 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-07-23 15:33:32,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-07-23 15:33:32,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:33:32,060 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 168 states. [2018-07-23 15:33:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:32,355 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-07-23 15:33:32,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-07-23 15:33:32,355 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 168 [2018-07-23 15:33:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:32,356 INFO L225 Difference]: With dead ends: 172 [2018-07-23 15:33:32,356 INFO L226 Difference]: Without dead ends: 170 [2018-07-23 15:33:32,357 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-07-23 15:33:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-07-23 15:33:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-07-23 15:33:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-07-23 15:33:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-07-23 15:33:32,361 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-07-23 15:33:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:32,362 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-07-23 15:33:32,362 INFO L472 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-07-23 15:33:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-07-23 15:33:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-07-23 15:33:32,362 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:32,363 INFO L353 BasicCegarLoop]: trace histogram [166, 1, 1, 1] [2018-07-23 15:33:32,363 INFO L414 AbstractCegarLoop]: === Iteration 167 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:32,363 INFO L82 PathProgramCache]: Analyzing trace with hash -629409332, now seen corresponding path program 166 times [2018-07-23 15:33:32,363 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:35,609 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:35,609 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168] total 168 [2018-07-23 15:33:35,610 INFO L450 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-07-23 15:33:35,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-07-23 15:33:35,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:33:35,613 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 169 states. [2018-07-23 15:33:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:36,270 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-23 15:33:36,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-07-23 15:33:36,270 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 169 [2018-07-23 15:33:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:36,270 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:33:36,270 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:33:36,273 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:33:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:33:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-23 15:33:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:33:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-07-23 15:33:36,277 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2018-07-23 15:33:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:36,277 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-07-23 15:33:36,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-07-23 15:33:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-07-23 15:33:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:33:36,278 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:36,278 INFO L353 BasicCegarLoop]: trace histogram [167, 1, 1, 1] [2018-07-23 15:33:36,278 INFO L414 AbstractCegarLoop]: === Iteration 168 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1963162567, now seen corresponding path program 167 times [2018-07-23 15:33:36,278 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:39,297 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:39,297 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169] total 169 [2018-07-23 15:33:39,298 INFO L450 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-07-23 15:33:39,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-07-23 15:33:39,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:33:39,301 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 170 states. [2018-07-23 15:33:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:39,746 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-07-23 15:33:39,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-07-23 15:33:39,746 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-07-23 15:33:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:39,746 INFO L225 Difference]: With dead ends: 174 [2018-07-23 15:33:39,746 INFO L226 Difference]: Without dead ends: 172 [2018-07-23 15:33:39,749 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-07-23 15:33:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-07-23 15:33:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-07-23 15:33:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-23 15:33:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-07-23 15:33:39,753 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2018-07-23 15:33:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:39,753 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-07-23 15:33:39,753 INFO L472 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-07-23 15:33:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-07-23 15:33:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-07-23 15:33:39,754 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:39,754 INFO L353 BasicCegarLoop]: trace histogram [168, 1, 1, 1] [2018-07-23 15:33:39,754 INFO L414 AbstractCegarLoop]: === Iteration 169 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash 728512812, now seen corresponding path program 168 times [2018-07-23 15:33:39,754 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:43,179 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:43,179 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170] total 170 [2018-07-23 15:33:43,179 INFO L450 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-07-23 15:33:43,181 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-07-23 15:33:43,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:33:43,182 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 171 states. [2018-07-23 15:33:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:43,568 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 15:33:43,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-07-23 15:33:43,569 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 171 [2018-07-23 15:33:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:43,569 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:33:43,569 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:33:43,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:33:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:33:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-23 15:33:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 15:33:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 15:33:43,579 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2018-07-23 15:33:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:43,579 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 15:33:43,579 INFO L472 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-07-23 15:33:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 15:33:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 15:33:43,580 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:43,580 INFO L353 BasicCegarLoop]: trace histogram [169, 1, 1, 1] [2018-07-23 15:33:43,580 INFO L414 AbstractCegarLoop]: === Iteration 170 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1109076071, now seen corresponding path program 169 times [2018-07-23 15:33:43,580 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:47,143 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:47,143 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171] total 171 [2018-07-23 15:33:47,143 INFO L450 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-07-23 15:33:47,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-07-23 15:33:47,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:33:47,147 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 172 states. [2018-07-23 15:33:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:47,972 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-07-23 15:33:47,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-07-23 15:33:47,972 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 172 [2018-07-23 15:33:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:47,973 INFO L225 Difference]: With dead ends: 176 [2018-07-23 15:33:47,973 INFO L226 Difference]: Without dead ends: 174 [2018-07-23 15:33:47,975 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-07-23 15:33:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-23 15:33:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-07-23 15:33:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-07-23 15:33:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-07-23 15:33:47,981 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 172 [2018-07-23 15:33:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:47,981 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-07-23 15:33:47,981 INFO L472 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-07-23 15:33:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-07-23 15:33:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-07-23 15:33:47,981 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:47,982 INFO L353 BasicCegarLoop]: trace histogram [170, 1, 1, 1] [2018-07-23 15:33:47,982 INFO L414 AbstractCegarLoop]: === Iteration 171 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash 21635212, now seen corresponding path program 170 times [2018-07-23 15:33:47,982 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:51,613 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:51,613 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172] total 172 [2018-07-23 15:33:51,614 INFO L450 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-07-23 15:33:51,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-07-23 15:33:51,619 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:33:51,619 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 173 states. [2018-07-23 15:33:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:51,847 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-23 15:33:51,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-07-23 15:33:51,847 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 173 [2018-07-23 15:33:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:51,848 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:33:51,848 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:33:51,849 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:33:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:33:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:33:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:33:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-07-23 15:33:51,855 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 173 [2018-07-23 15:33:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:51,855 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-07-23 15:33:51,855 INFO L472 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-07-23 15:33:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-07-23 15:33:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:33:51,856 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:51,856 INFO L353 BasicCegarLoop]: trace histogram [171, 1, 1, 1] [2018-07-23 15:33:51,856 INFO L414 AbstractCegarLoop]: === Iteration 172 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:51,856 INFO L82 PathProgramCache]: Analyzing trace with hash 670706951, now seen corresponding path program 171 times [2018-07-23 15:33:51,856 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:55,338 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:55,338 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173] total 173 [2018-07-23 15:33:55,339 INFO L450 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-07-23 15:33:55,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-07-23 15:33:55,341 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:33:55,341 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 174 states. [2018-07-23 15:33:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:33:56,073 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-07-23 15:33:56,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-07-23 15:33:56,073 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 174 [2018-07-23 15:33:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:33:56,073 INFO L225 Difference]: With dead ends: 178 [2018-07-23 15:33:56,074 INFO L226 Difference]: Without dead ends: 176 [2018-07-23 15:33:56,075 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-07-23 15:33:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-07-23 15:33:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-07-23 15:33:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-23 15:33:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-07-23 15:33:56,080 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 174 [2018-07-23 15:33:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:33:56,080 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-07-23 15:33:56,080 INFO L472 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-07-23 15:33:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-07-23 15:33:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-07-23 15:33:56,080 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:33:56,080 INFO L353 BasicCegarLoop]: trace histogram [172, 1, 1, 1] [2018-07-23 15:33:56,081 INFO L414 AbstractCegarLoop]: === Iteration 173 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:33:56,081 INFO L82 PathProgramCache]: Analyzing trace with hash -682905620, now seen corresponding path program 172 times [2018-07-23 15:33:56,081 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:33:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:33:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:33:59,637 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:33:59,637 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174] total 174 [2018-07-23 15:33:59,637 INFO L450 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-07-23 15:33:59,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-07-23 15:33:59,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:33:59,641 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 175 states. [2018-07-23 15:34:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:00,020 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-23 15:34:00,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-07-23 15:34:00,020 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 175 [2018-07-23 15:34:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:00,021 INFO L225 Difference]: With dead ends: 179 [2018-07-23 15:34:00,021 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:34:00,023 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:34:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:34:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-23 15:34:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:34:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-07-23 15:34:00,028 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 175 [2018-07-23 15:34:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:00,029 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-07-23 15:34:00,029 INFO L472 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-07-23 15:34:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-07-23 15:34:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:34:00,029 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:00,030 INFO L353 BasicCegarLoop]: trace histogram [173, 1, 1, 1] [2018-07-23 15:34:00,030 INFO L414 AbstractCegarLoop]: === Iteration 174 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash 304777639, now seen corresponding path program 173 times [2018-07-23 15:34:00,030 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:03,265 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:03,265 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [175] total 175 [2018-07-23 15:34:03,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-07-23 15:34:03,268 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-07-23 15:34:03,269 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:34:03,269 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 176 states. [2018-07-23 15:34:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:03,959 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2018-07-23 15:34:03,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2018-07-23 15:34:03,959 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 176 [2018-07-23 15:34:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:03,959 INFO L225 Difference]: With dead ends: 180 [2018-07-23 15:34:03,959 INFO L226 Difference]: Without dead ends: 178 [2018-07-23 15:34:03,961 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=15400, Invalid=15400, Unknown=0, NotChecked=0, Total=30800 [2018-07-23 15:34:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-07-23 15:34:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-07-23 15:34:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-07-23 15:34:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-07-23 15:34:03,966 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 176 [2018-07-23 15:34:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:03,966 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-07-23 15:34:03,966 INFO L472 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-07-23 15:34:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-07-23 15:34:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-07-23 15:34:03,967 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:03,967 INFO L353 BasicCegarLoop]: trace histogram [174, 1, 1, 1] [2018-07-23 15:34:03,967 INFO L414 AbstractCegarLoop]: === Iteration 175 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 858187596, now seen corresponding path program 174 times [2018-07-23 15:34:03,967 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15225 backedges. 0 proven. 15225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:07,410 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:07,410 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [176] total 176 [2018-07-23 15:34:07,410 INFO L450 AbstractCegarLoop]: Interpolant automaton has 177 states [2018-07-23 15:34:07,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2018-07-23 15:34:07,415 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:34:07,415 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 177 states. [2018-07-23 15:34:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:07,930 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 15:34:07,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-07-23 15:34:07,930 INFO L78 Accepts]: Start accepts. Automaton has 177 states. Word has length 177 [2018-07-23 15:34:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:07,930 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:34:07,930 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:34:07,933 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:34:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:34:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 15:34:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 15:34:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 15:34:07,937 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 177 [2018-07-23 15:34:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:07,938 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 15:34:07,938 INFO L472 AbstractCegarLoop]: Interpolant automaton has 177 states. [2018-07-23 15:34:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 15:34:07,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 15:34:07,938 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:07,938 INFO L353 BasicCegarLoop]: trace histogram [175, 1, 1, 1] [2018-07-23 15:34:07,938 INFO L414 AbstractCegarLoop]: === Iteration 176 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:07,938 INFO L82 PathProgramCache]: Analyzing trace with hash 834027079, now seen corresponding path program 175 times [2018-07-23 15:34:07,939 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:11,597 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:11,597 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [177] total 177 [2018-07-23 15:34:11,598 INFO L450 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-07-23 15:34:11,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-07-23 15:34:11,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:34:11,601 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 178 states. [2018-07-23 15:34:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:12,317 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-07-23 15:34:12,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2018-07-23 15:34:12,317 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 178 [2018-07-23 15:34:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:12,318 INFO L225 Difference]: With dead ends: 182 [2018-07-23 15:34:12,318 INFO L226 Difference]: Without dead ends: 180 [2018-07-23 15:34:12,320 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15753, Invalid=15753, Unknown=0, NotChecked=0, Total=31506 [2018-07-23 15:34:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-07-23 15:34:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-07-23 15:34:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-23 15:34:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-07-23 15:34:12,324 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 178 [2018-07-23 15:34:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:12,325 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-07-23 15:34:12,325 INFO L472 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-07-23 15:34:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-07-23 15:34:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-23 15:34:12,325 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:12,325 INFO L353 BasicCegarLoop]: trace histogram [176, 1, 1, 1] [2018-07-23 15:34:12,325 INFO L414 AbstractCegarLoop]: === Iteration 177 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash 85051052, now seen corresponding path program 176 times [2018-07-23 15:34:12,326 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15576 backedges. 0 proven. 15576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:16,159 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:16,159 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [178] total 178 [2018-07-23 15:34:16,159 INFO L450 AbstractCegarLoop]: Interpolant automaton has 179 states [2018-07-23 15:34:16,162 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2018-07-23 15:34:16,164 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:34:16,164 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 179 states. [2018-07-23 15:34:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:16,624 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-23 15:34:16,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2018-07-23 15:34:16,625 INFO L78 Accepts]: Start accepts. Automaton has 179 states. Word has length 179 [2018-07-23 15:34:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:16,625 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:34:16,625 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:34:16,627 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15931, Invalid=15931, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:34:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:34:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:34:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:34:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-07-23 15:34:16,632 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 179 [2018-07-23 15:34:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:16,632 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-07-23 15:34:16,632 INFO L472 AbstractCegarLoop]: Interpolant automaton has 179 states. [2018-07-23 15:34:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-07-23 15:34:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:34:16,632 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:16,632 INFO L353 BasicCegarLoop]: trace histogram [177, 1, 1, 1] [2018-07-23 15:34:16,632 INFO L414 AbstractCegarLoop]: === Iteration 178 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1658369305, now seen corresponding path program 177 times [2018-07-23 15:34:16,633 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:34:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:34:20,364 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:34:20,364 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [179] total 179 [2018-07-23 15:34:20,364 INFO L450 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-07-23 15:34:20,366 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-07-23 15:34:20,367 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:34:20,367 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 180 states. [2018-07-23 15:34:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:34:21,354 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-07-23 15:34:21,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2018-07-23 15:34:21,355 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 180 [2018-07-23 15:34:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:34:21,355 INFO L225 Difference]: With dead ends: 184 [2018-07-23 15:34:21,355 INFO L226 Difference]: Without dead ends: 182 [2018-07-23 15:34:21,357 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-07-23 15:34:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-07-23 15:34:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-07-23 15:34:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-07-23 15:34:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-07-23 15:34:21,363 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 180 [2018-07-23 15:34:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:34:21,363 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-07-23 15:34:21,363 INFO L472 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-07-23 15:34:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-07-23 15:34:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-23 15:34:21,364 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:34:21,364 INFO L353 BasicCegarLoop]: trace histogram [178, 1, 1, 1] [2018-07-23 15:34:21,364 INFO L414 AbstractCegarLoop]: === Iteration 179 === [mainErr0AssertViolationASSERT]=== [2018-07-23 15:34:21,364 INFO L82 PathProgramCache]: Analyzing trace with hash 130174476, now seen corresponding path program 178 times [2018-07-23 15:34:21,364 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:34:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-23 15:34:24,620 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:34:24,625 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:34:24,626 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:34:24 BoogieIcfgContainer [2018-07-23 15:34:24,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:34:24,627 INFO L168 Benchmark]: Toolchain (without parser) took 255293.70 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 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 322.7 MB. Max. memory is 7.1 GB. [2018-07-23 15:34:24,635 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:34:24,635 INFO L168 Benchmark]: Boogie Preprocessor took 61.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:34:24,636 INFO L168 Benchmark]: RCFGBuilder took 352.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:34:24,636 INFO L168 Benchmark]: TraceAbstraction took 254873.36 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 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 312.1 MB. Max. memory is 7.1 GB. [2018-07-23 15:34:24,638 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 352.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 254873.36 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 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 312.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 41). Cancelled while BasicCegarLoop was analyzing trace of length 182 with TraceHistMax 178, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 140 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 254.8s OverallTime, 179 OverallIterations, 178 TraceHistogramMax, 27.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 536 SDtfs, 2 SDslu, 10243 SDs, 0 SdLazy, 26351 SolverSat, 295 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16109 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 15931 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 158.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=182occurred in iteration=178, 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: 0.8s AutomataMinimizationTime, 178 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 46.9s SatisfiabilityAnalysisTime, 171.3s InterpolantComputationTime, 16287 NumberOfCodeBlocks, 16287 NumberOfCodeBlocksAsserted, 178 NumberOfCheckSat, 16109 ConstructedInterpolants, 0 QuantifiedInterpolants, 15229326 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 178 InterpolantComputations, 1 PerfectInterpolantSequences, 0/939929 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/Luxembourg-ArraysIntegefied.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-34-24-658.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-34-24-658.csv Completed graceful shutdown